Bob Henson @bhensonweather Twitter profile

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Bob Henson

@bhensonweather

9 months

You can find me there too! Same handle as here…

Prof. Katharine Hayhoe

@KHayhoe

9 months

Great news! The new platform from the original creator of Twitter - blue sky - is now open. Run, don’t walk, over there for an active & thriving science community with the kind of discussions that used to occur here back in the day. Can’t recommend it highly enough. Here’s me ⬇️

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Bob Henson

@bhensonweather

2 years

Cheyenne WY just dropped from 43F to 11F in 9 minutes. After 21 more minutes, they're down to 3F.

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Bob Henson

@bhensonweather

8 years

Oh yes. #marchforscience

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Bob Henson

@bhensonweather

1 year

I caught these unearthly mammatus west of the Kimball NE area just after sunset on Fri 6/23/23. They were generated by a severe storm complex in far NE CO.

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Bob Henson

@bhensonweather

4 years

Incredible, and frightening: this is the northernmost 100°F reading ever reliably observed.

Richard Heatwave Berler

@HeatwaveKGNS

4 years

Saturday 10:24 am: Hottest on record in Siberia...Verhojansk, which has an average high of the day of 68F during June, had their first 100F reading on record today!

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Bob Henson

@bhensonweather

1 year

Lest anyone think this is some kind of mapping error, SST reports from buoys around the Florida Keys posted as of ~7 PM ET Sun are downright shocking, e.g.: Key West 92.1F Vaca Key 94.3F Johnson Key 95.7F 😱

Brian McNoldy

@BMcNoldy

1 year

Ok, not sure I've ever seen the water around Florida look quite like this before... at any time of year. 😬

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Bob Henson

@bhensonweather

27 days

A critical point here. Katrina reached Cat 5 strength in the Gulf but "only" made landfall as a Cat 3. That didn't matter for Katrina's catastrophic surge. There are other examples. Simply no precedent in living memory for a FL W Coast storm of this trajectory & strength....

Jeremy DeHart

@JeremyDeHart53d

27 days

#Milton is on a path to Cat 5 today. But want to address the "it's supposed to weaken" talk before it even gets out the gate. Regardless of winds at landfall, this 10-12 ft surge is set in motion. Wall of water higher than a basketball hoop. If you're <12 ft of elevation, GET OUT

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Bob Henson

@bhensonweather

2 years

If confirmed, this prelim total of 22.59” in just seven hours tonight at Fort Lauderdale would obliterate the city’s rainfall record for any ***three calendar days** (18.24” on Oct 19-21, 1924)

Tucker Antico

@tuckerweather

2 years

Easily one of the wildest mesoscale weather events I've seen... This supercell recently divided after being stationary for hours. Both cyclonic & anticyclonic rotation has been exhibited. Between 3-10pm, the Fort Lauderdale-Hollywood Int'l AP measured 22.59" of rainfall... #FLwx

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Bob Henson

@bhensonweather

6 years

Australia has just seen the world's hottest temperature recorded next to open ocean: 120.4°F (49.1°C), less than a block from the sea.

Weather Underground

@wunderground

6 years

Imagine 120°F (49°C) in the shade--and even by the water. You're picturing the #heatwave now scorching #Australia . Fire threat will be top-of-the-scale in some areas on Friday

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Bob Henson

@bhensonweather

3 years

Today is hotter in Portland OR - at least 115F - than it has ever been in: Oklahoma City OK (113F on 8/11/1936 and 8/3/2012) Dallas-Fort Worth TX (113F on 6/26 and 6/27/1980) Austin TX (112F on 9/5/2000 and 8/28/2011)

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Bob Henson

@bhensonweather

2 years

A overnight "low" of 94.8F?? And this hellish night was not in a tiny town. Chongqing has close to 9 million residents, with 30 million in the entire administrative area.

Scott Duncan

@ScottDuncanWX

2 years

We are looking at the hottest August night in Chinese history (if passes verification) with a Tmin of 34.9°C in Chongqing via @extremetemps

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Bob Henson

@bhensonweather

2 years

It's hard to overstate the scenario in Atlantic Canada with #Fiona . Multiple models in multiple runs now predict Fiona could set a national record low for sea-level pressure at landfall. See attached example, from the 12Z HWRF, showing 927 mb *after* crossing Nova Scotia. 1/3

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Bob Henson

@bhensonweather

4 years

Let's nip this "frozen wind turbines" narrative in the bud, right here and now. Yes, that's a thing, but by far the biggest factor in Texas' electricity emergency today was the loss of thermal power plants--and most of them are gas-powered.

Daniel Cohan

@cohan_ds

4 years

Wind has been producing ~1.5 GW less than ERCOT expected for a winter peak event, solar ~1 GW more than expected, & nuclear running 100%. Meanwhile, >30 GW of fossil plants, mostly natural gas, went down. So of course the narrative is -- frozen wind turbines! 🤦‍♂️ #RollingBlackouts

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Bob Henson

@bhensonweather

3 years

Seattle's NWS forecaster is laying it out: "...temperatures will skyrocket at sunrise. As there is no previous occurrence of the event we're experiencing in the local climatological record, it's somewhat disconcerting to have no analogy to work with."

IEM :: AFD from NWS SEW

AFD issued by NWS SEW at 28 Jun 2021 03:30 UTC

mesonet.agron.iastate.edu

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Bob Henson

@bhensonweather

2 months

When seasonal forecasts flop, you tend to hear about it—but when they're good, it's often crickets. Here are NOAA's 2024 summer temp outlook (Jun-Aug), w/the observed temp anomalies for virtually the same period. The general flavors are right there.

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Bob Henson

@bhensonweather

6 years

2018 is the first year on record with Category 5 storms in the Atlantic, East Pacific, Central Pacific, and West Pacific.

Weather Underground

@wunderground

6 years

Last year's Hurricane Michael has now been upgraded to Category 5, making it just the fourth storm on record to strike the Gulf or Atlantic U.S. coast at Cat 5 strength.

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Bob Henson

@bhensonweather

6 years

Arctic sea ice extent is plummeting into truly uncharted territory for mid-April.

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Bob Henson

@bhensonweather

7 years

Broward County's last direct hit from a Cat 3/4/5 hurricane was in 1947. Population then: 80,000. Population now: 1.9 million.

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Bob Henson

@bhensonweather

7 years

Since records began in 1898, Dallas-Fort Worth had never hit 90°F in November. Now they've done it on 3 of last 4 days (at least 93F Sun).

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Bob Henson

@bhensonweather

7 years

Not-so-fun fact: The contiguous U.S. has never been struck by two Cat 4 hurricanes in a single year, in records going back to 1851.

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Bob Henson

@bhensonweather

9 months

This value would be mind-boggling in March, never mind January.

Nahel Belgherze

@WxNB_

9 months

BREAKING: Earth’s oceans have preliminarily set a new all-time record high temperature yesterday at 21.10°C. The previous record was set only a few months ago in August 2023.

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Bob Henson

@bhensonweather

3 years

Cyclone #Shaheen -Gulab is predicted to strike as a Cat 2 storm near #Sohar , Oman--a city that's never even recorded a tropical depression before. Waves could approach 40 feet, and rains of 8-20" are possible. Sohar's entire *annual* average is 4". 1/2

Shaheen headed for historic landfall in Oman » Yale Climate Connections

The cyclone is pushing west on an unprecedented track through the Gulf of Oman.

yaleclimateconnections.org

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Bob Henson

@bhensonweather

4 years

The just-failed #Sanford and #Edenville dams--both 95 years old and privately owned--are both rated "high hazard" in the National Inventory of Dams. () High hazard = "loss of human life is likely if a dam were to fail."

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Bob Henson

@bhensonweather

5 years

Here is a quietly amazing development: Great Britain, the very cradle of the Industrial Revolution, now has a coal-free electric grid.

Coal - GB Grid

@UK_Coal

5 years

GB National Grid: #Coal is currently generating 0.00GW (0.00%) out of a total of 27.01GW Continuous hours without coal: 263 (10 Days 23 Hours)

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Bob Henson

@bhensonweather

6 years

Judging from the crickets on major U.S. news sites, who would ever know that a hurricane ( #Yutu ) is expected to slam into a U.S. commonwealth as a Category 5 storm in about 12 hours? Most of the 53,000 residents of the #northernmarianas are U.S. citizens

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Bob Henson

@bhensonweather

4 months

Rapidly developing fire in the #Boulder Flatirons just west of town. I saw flames briefly.

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Bob Henson

@bhensonweather

3 years

The Schuylkill River in Philadelphia is at its highest level since Oct. 4, 1869. That was nearly 152 years ago.

Taryn Hatcher

@TarynNBCS

3 years

The River Walk is absolutely submerged

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Bob Henson

@bhensonweather

1 year

#Otis poses a sudden, dire, and unusual threat to the Acapulco area after leaping from tropical storm to cat-3 hurricane strength in just 6 hrs. No major hurricane landfall has been recorded within 50 miles of the city, as is now predicted for #Otis early Wed.

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Bob Henson

@bhensonweather

5 years

Here is a graphic showing all floods over 110 cm in Venice since the 1800s. There is a trend.

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Bob Henson

@bhensonweather

5 years

The NWS is calling for *each* of the next five days to be hotter than the *official all-time record* for Anchorage. I don’t think I’ve ever seen a forecast quite like this.

Brian Brettschneider

@Climatologist49

5 years

Grid forecast for east Anchorage beginning on the 4th. This is unbelievable. @AlaskaWx @DaveSnider

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Bob Henson

@bhensonweather

2 years

@AriGerstman Hey, Ari! There's not a solid long-term database on hourly temp swings. That said, this is the biggest drop on record in Cheyenne for a one-hour span, much less 30 minutes.

NWS Cheyenne

@NWSCheyenne

2 years

The cold front has arrived in Cheyenne and it is already a record-breaker! From 1:05 to 1:35, the temperature plunged from 43 to 3 degrees, a FOURTY-DEGREE drop in just 30 minutes! This shatters our previous 1-hour temp drop record of 37 degrees, and we are still dropping! #wywx

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Bob Henson

@bhensonweather

7 years

In a nutshell: “the most extraordinary heat event to ever affect the northeastern quadrant of the U.S. during the month of February,” in records going back to the 1800s.

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Bob Henson

@bhensonweather

2 years

Last week the U.S. Drought Monitor reported the highest fraction of abnormal dryness/drought (81.78% of the contiguous U.S.) in the monitor's 23-year history. This week the record was toppled again, with 82.23%.

More than 80 percent of the U.S. is facing troubling dry conditions

There has not been more widespread abnormally dry and drought conditions in the U.S. since at least 2000.

www.washingtonpost.com

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Bob Henson

@bhensonweather

5 years

#Alert , Nunavut, Canada—at latitude 82.5°N, the northernmost permanently inhabited spot on Earth—hit 69°F today (20.5°C) for the first time on record. Needless to say, this one can't be pinned on an urban heat island.

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Bob Henson

@bhensonweather

4 years

The 136F from Al Azizia, Libya, has been tossed. WMO still recognizes 134F (56.7C) from Death Valley (10 July 1913) and 131F (55C) from Kebili, Tunisia (7 July 1931). Some experts argue for 129.2F (54C) as the world record. See

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Bob Henson

@bhensonweather

3 years

The building PacNW/SW Canada heat wave is not just a grave public health threat. I think it'll have a profound effect on the collective psyche of the region, and just maybe on climate change awareness. 1/7

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Bob Henson

@bhensonweather

6 years

As of today, the U.S. has gone five years without an EF5 tornado. That's the second longest grace period in records going back to 1950.

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Bob Henson

@bhensonweather

7 years

Please don't fixate on whether Harvey arrives as a Cat 2, 3, or 4. It's the mammoth rainfall amounts (up to 35") that will affect millions.

Weather Underground

@wunderground

7 years

Intensifying #Harvey is on track to strike TX early Sat. as a major hurricane--the nation's first in 12 years

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Bob Henson

@bhensonweather

1 year

Basically the hottest day in the recorded weather history of southeast Texas and southern Louisiana, affecting upwards of 10 million people.

Extreme Temperatures Around The World

@extremetemps

1 year

RECORD DAY Historic heat wave on the Gulf All time records fell by dozens including New Orleans, Houston (tie) and many others. Here a list of the most important all time records broken, tied and some for August.

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Bob Henson

@bhensonweather

3 years

Another day, another U.S. landfall: #Nicholas will be the 19th named storm to strike the U.S. in the last 17 months. The 1950-2020 annual average for U.S. named-storm landfalls (tropical storms and hurricanes) is three.

Nicholas to hit Texas by Monday eve close to hurricane strength » Yale Climate Connections

Heavy rains and a storm surge of 3-5 feet are the main threat of the slow-moving tropical storm.

yaleclimateconnections.org

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Bob Henson

@bhensonweather

4 years

Per mapping by @DrJeffMasters atop NOAA’s historical hurricanes database, Zeta is the strongest hurricane on record whose center passed directly over the city of New Orleans (light orange area).

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Bob Henson

@bhensonweather

9 months

Breaking a monthly temperature record (not just a daily record) by a full 3°F—at a location with 150 years of recordkeeping—is no minor feat.

NWS Boise

@NWSBoise

9 months

🚨 Today's high of 66° in Boise is the warmest temperature on record for the month of January. It breaks the previous monthly record of 63° (1/9/53) Temperature records date back to 1875. #idwx

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Bob Henson

@bhensonweather

4 years

Not to go off on a tangent, but this is a clear sine of the times.

Tomer Burg

@burgwx

4 years

Latest forecast for Subtropical Storm Theta:

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Bob Henson

@bhensonweather

1 year

Colossal catastrophe appears imminent on NW coast of Myanmar. Cyclone #Mocha peaked as Cat 5 (sustained winds 150 kts/175 mph) per JTWC update, at 0Z 5/14. Huge storm surge likely in/near Sittwe (pop 180K) & nearby refugee camps. Landfall ~ 7-10Z 5/14.

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Bob Henson

@bhensonweather

3 years

Not only is this scorching 107.7°F the warmest daily low in U.S. history, assuming it holds till midnight (a safe bet), but it was recorded at one of the nation's gold-standard Climate Reference Network stations:

Thierry Goose

@ThierryGooseBC

3 years

Min temperature of 42.0°C [107.7°F] in Stovepipe Wells, #DeathValley 🇺🇸 last night! This is the highest min temperature ever recorded in North America & the highest worldwide outside Oman (in Khasab). Previous record in N.A. was 41.7°C [107°F] in Furnace Creek on July 12, 2012.

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Bob Henson

@bhensonweather

3 years

What made the landscape so fire-prone before Thursday's extreme high winds spawned the #MarshallFire ? Denver data for Sep 1-Dec 29: --Avg temp: 52.2F (2nd warmest in 150 yrs of data) --Precip: 0.47" (least in 150 yrs of data) --Snowfall: 0.3" (least in 140 yrs of data)

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Bob Henson

@bhensonweather

6 years

Today is the hottest day ever recorded at Alice Springs, Australia: 114°F

Etienne Kapikian

@EKMeteo

6 years

#canicule #Australie #Australia #heatwave Records absolus sur la partie centrale ce 3 janvier 45,6°C Alice Springs (=29-12-2018, > 45,2 03-01-1960) 46,8°C Uluru (Ayers Rock) > 46,4 11-01-2013 47,4°C Walungurru > 46,7 09-01-2013 (le + chaud depuis 1960 dans le Territoire du Nord)

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Bob Henson

@bhensonweather

8 months

In the history of “key messages” issued by NWS offices, this smorgasbord is as key as it gets. Good Lord!

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Bob Henson

@bhensonweather

6 years

There's virtually no precedent for a hurricane moving southwest for some time along the Carolina coast. Such an unorthodox track could produce some very unexpected outcomes, including a storm surge propagating from north to south.

Weather Underground

@wunderground

6 years

#Florence may produce the heaviest rains of any East Coast hurricane on record, and its storm surge could unfold in some unusual, dangerous ways.

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Bob Henson

@bhensonweather

4 years

You *know* it's a bad hurricane season when NHC puts a yellow area (for possible new development in the next 5 days) around an existing hurricane.

Jonathan Erdman

@wxjerdman

4 years

#Kappa later this week? Possible threat for Nicaragua and Costa Rica. Some ensemble guidance suggests it's possible, and NHC has now circled it. What a dreadful #hurricane season.

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Bob Henson

@bhensonweather

6 years

Key point from the article: Beaufort, NC, had its highest water level on record early today--but without sea level rise since the 1950s, that record would not have occurred.

Weather Underground

@wunderground

6 years

Already, #Florence has produced record-high coastal water levels, and rainfall may top 40" in some areas through the weekend. The risk of devastating floods is going up. This disaster is far, far from over. The latest from WU experts:

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Bob Henson

@bhensonweather

7 years

Fascinating patterns in U.S. spring leaf-out this year: 2-3 weeks late in the near-record-cold-April zone from NoPlains to Northeast, and 1-2 weeks late in Deep South, but 1-3 weeks early across the Southwest & Upper South.

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Bob Henson

@bhensonweather

5 years

Boulder hit 9F this morning, the coldest it's ever been this late in the season. Incredible scenery today after a 17.7" snowstorm that pushed up our record seasonal total to 152.0" (so far....)

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Bob Henson

@bhensonweather

2 years

An unexpectedly dire situation: we suddenly have a super typhoon, #Nori , forecast to strike the Philippines as a compact category 5 storm in less than 24 hours.

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Bob Henson

@bhensonweather

3 years

Suffice it to say that the Pac NW + adjacent Canada are facing what may be one of the worst heat waves in their history this weekend into next week. Multiple runs of multiple models are spitting out astonishingly high temps (see attached for just one example). 1/4

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Bob Henson

@bhensonweather

3 years

So much to say about this disaster, which is still resonating profoundly among local friends and colleagues, several of whom lost their homes. More than a few in the Boulder-area weather and climate community were hit hard, along with so many other folks.

A month of unprecedented U.S. weather disasters ends with Colorado fire catastrophe » Yale Climate...

December 2021 put an exclamation point on a migration of warm-season threats toward winter.

yaleclimateconnections.org

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Bob Henson

@bhensonweather

3 years

Today's 103.3°F in Canada's Northwest Territories is the highest temp ever recorded north of latitude 60°N (!).

Extreme Temperatures Around The World

@extremetemps

3 years

🇨🇦 Canadian Heat Wave-3pm update:Another world record was set today 30 June!39.6C at Fort Smith NWT highest temperature ever recorded worldwide above 60N and Highest temperature ever recorded in the Northwest Territory. More south 46.1C provisional at Ashcroft.

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Bob Henson

@bhensonweather

2 years

It's August 17 (01Z), and there is not a single active tropical cyclone anywhere on planet Earth. That is all.

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Bob Henson

@bhensonweather

3 years

Prior to this week, Canada's all-time high was 113F. Now it's 121.3°F. Moreover, this is at one of Canada's high-quality Reference Climate Stations. To break a national heat record by more than 8F over three days...words fail.

An Overview of Surface-Based Precipitation Observations at Environment and Climate Change Canada

The objective of this paper is to provide an overview of the present status and procedures related to surface precipitation observations at Environment and Climate Change Canada (ECCC). This work w...

www.tandfonline.com

Rob's Obs

@robsobs

3 years

Updated maximum: 49.6C (121F) #BCheat

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Bob Henson

@bhensonweather

4 years

It's hard to overstate the seriousness of this threat to the world's most surge-vulnerable coastline.

Weather Underground

@wunderground

4 years

With top winds now 165 mph, Category 5 #Amphan continues to barrel toward east India and Bangladesh with a potentially catastrophic storm surge.

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Bob Henson

@bhensonweather

1 year

Just one year after extreme heat killed 18,000+ people in Italy, another historic heat wave looms. The @wunderground forecast of 107F (41.7C) at Rome on Tues 7/18 would set an all-time high for the Eternal City.

Guy Walton

@climateguyw

1 year

Main Topic: #HeatwaveCerberus Has Southern Europe in Its Jaws On The Extreme Temperature Diary- THU 7/13/2023 At: +New linked #Climate #Weather articles @MichaelEMann @KHayhoe @ClimateOfGavin @ZLabe

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Bob Henson

@bhensonweather

3 years

Even before an attribution study, we know #Ida checks off many of the key boxes of how climate change influences hurricanes, including: --warmer oceans --rapid intensification --greater likelihood of Cat 4/5 Katharine Hayhoe says it best, as she so often does:

Prof. Katharine Hayhoe

@KHayhoe

5 years

"Was it caused by climate change?" is the most common question when we hear about an extreme event. But when it comes to hurricanes, that's the wrong question. The right one is, "how much worse did climate change make it?" (thread)

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Bob Henson

@bhensonweather

4 years

Ten people were slaughtered today at my neighborhood grocery, just down the road. My heart goes out to their friends, colleagues, and loved ones. I've shopped at this store many hundreds of times over the past 30 years. I can't possibly capture in a tweet how awful this feels.

Boulder Police Dept.

@boulderpolice

4 years

Chief: Our hearts go out to all families impacted. There are 10 fatalities. She identified slain Police Officer Eric Talley, who was one of the first on the scene. She calls officer's actions "heroic."

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Bob Henson

@bhensonweather

3 years

Amazing to see roughly a third of the contiguous U.S. literally off the color scale on the warm side...and across a 15-day average to boot.

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Bob Henson

@bhensonweather

5 years

In a case of incredible timing, the annual meeting of the National Weather Association—which includes many NOAA and NWS operational meteorologists—gets under way on Saturday 9/7 (in Alabama, as it happens). There will be much to discuss.

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Bob Henson

@bhensonweather

5 years

Note: Some levee segments along MS River in New Orleans may be as low as 18 feet. "Thus, a 20-foot river height could cause overtopping at some of those locations, something that has never happened in the city's modern history."

Mississippi River will rise to top of lowest New Orleans levees as possible hurricane nears,...

South Louisiana should brace for the effects of a storm expected to be named Hurricane Barry by the time it makes landfall with maximum winds of 85 mph along the

www.nola.com

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Bob Henson

@bhensonweather

1 year

If Sunday's official forecast high of 120F at Rio Grande Village, TX, comes to pass, it will tie the all-time high temperature for the entire state of Texas, first recorded on August 12, 1936, in Seymour—at the height of the Dust Bowl— and again on June 28, 1994, in Monahans.

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Bob Henson

@bhensonweather

1 year

Pretty incredible to have the hottest day in recorded weather history at roughly 100 stations in France...and more than two months after the summer solstice.

Extreme Temperatures Around The World

@extremetemps

1 year

🧵 Historic heat in France with 44.4C at Salindres and 44.2C at Siran,hottest in August in French history. 223 MONTHLY RECORDS today (nearly half were all time records) with a total of nearly 500 RECORDS broken so far LONG POR ALL TIME HIGHS Thread:

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Bob Henson

@bhensonweather

6 years

This is the real deal. Hurricanes that intensify overnight just before reaching land are the worst nightmare of forecasters and emergency managers.

Weather Underground

@wunderground

6 years

Heads up: Florida's entire Gulf Coast north of Punta Gorda has never recorded a Category 4 hurricane landfall. #Michael is now predicted to reach Cat 4 strength just before it hits the FL Panhandle

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Bob Henson

@bhensonweather

1 year

Cat 4 Hurricane #Dora is passing more than 700 miles S of Maui, but Dora is teaming up with strong high pressure N of Maui to push 40-60 mph wind gusts into Lahaina, heating/drying as they flow downslope. West coast of Maui in moderate to severe drought:

Marc Cota-Robles

@abc7marccr

1 year

Major fires are burning across #Maui and the Big Island amid high winds. This video shows Lahaina's popular Front Street on fire - multiple structures have burned. No confirmed fatalities. We'll keep you posted on @ABC7

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Bob Henson

@bhensonweather

5 years

San Francisco just had its first rainless February since the Civil War.

Daniel Alrick

@SFmeteorologist

5 years

February 2020 ends with zero rainfall in San Francisco. Only other Feb on record with no rain was way back in 1864 (records go to 1849-50). Also a big difference from Feb 2019 when almost 8" of rain fell. Temps averaged well above normal (17th warmest Feb on record). #SF #CAwx

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Bob Henson

@bhensonweather

1 year

Canada's Year of Wildfire Hell continues. The capital of the Northwest Territories—roughly 250 miles south of the Arctic Circle—is now under a partial evacuation alert.

ts'ǫǫ̀kołı̨ı̨ 🍉

@porterfieldlol

1 year

parts of Yellowknife are now on evacuation alert, a historic first for the capital city.

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Bob Henson

@bhensonweather

1 year

Eeeek. #Hilary 's top sustained winds have rocketed from 40 mph to 105 mph in the past 21 hours. That's almost twice the strengthening rate that defines rapid intensification (35 mph in 24 hrs).

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Bob Henson

@bhensonweather

6 years

In the world's oldest weather database (Central England Temperature series, which began in 1659), the summer of 2018 is in the top 3, neck and neck with 1826 and 1976. Of the CET's 10 hottest summers since 1659, 8 have occurred since 1900 and 6 since 1976

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Bob Henson

@bhensonweather

5 years

Boulder is still in the throes of its biggest November snowstorm in decades. 22" here in South Boulder as of late morning Tuesday.

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Bob Henson

@bhensonweather

6 years

Terrible case of deja vu tonight in #EllicottCity , MD, where the second catastrophic flash flood in two years is still in progress

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Bob Henson

@bhensonweather

2 years

It's especially impressive (and unsettling) to see all-time heat records being set in Europe before we even get to the summer solstice.

Scott Duncan

@ScottDuncanWX

2 years

Extreme heat is now breaking long-standing all-time records in Germany 🇩🇪 Cottbus station in the northeast of the country about 100 km from Berlin has set a new all-time heat record (for any month). The new record is 39.2°C (102.6°F). Observations here began in 1888.

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Bob Henson

@bhensonweather

1 year

Trying to imagine how Ted Fujita, who first conceptualized downbursts, would have reacted to this amazing video 😮

Bobby Johnson

@wx_okla

1 year

Downburst around 6:30 am this morning looking north towards Edmond from Sante Fe and Memorial. #okwx @LaceySwope @CassieHeiter

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Bob Henson

@bhensonweather

6 years

Here's the landmark 1975 paper in Science by the late Wallace (Wally) Broecker in Science—the first paper to use the phrase "global warming" in its title.

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Bob Henson

@bhensonweather

2 years

More perspective: the annual average rainfall at FLL (1991-2020) is 68.77". So the city apparently got about 1/3 of its annual rainfall in seven hours today. Desert climates can sometimes do this (rarely), but it's astonishing to see it happen in a moist climate like SoFla's.

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Bob Henson

@bhensonweather

1 year

An upper low morphing into a " #Medicane " is dumping titanic amounts of rain on central Greece, just days after northeast Greece was hit with the EU's worst fire of this century. @CC_Yale

Fire to flood: Greece's destructive roller-coaster ride » Yale Climate Connections

After the EU’s largest wildfire this century, Greece is being deluged with massive rains.

yaleclimateconnections.org

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Bob Henson

@bhensonweather

12 days

Not only could this be the driest month in contiguous-U.S. history (see below from @BillKarins ), but it also seems to have an inside track on being the warmest.

Bill Karins 💧

@BillKarins

12 days

We will likely have ~ ½ of the US Climate stations recording their driest October. Look at how many are #1 for the driest month-to-date! Could this be the driest month ever recorded in the Lower 48? Not much will fall from the sky over the next 7 days either.

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Bob Henson

@bhensonweather

3 years

Claudette may be the first tropical storm to be named over land (LA) and then reborn as a tropical storm over land (NC).

Tropical Storm Claudette reclaims tropical storm status while over North Carolina » Yale Climate...

Claudette is the first deadly storm of the 2021 Atlantic hurricane season.

yaleclimateconnections.org

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Bob Henson

@bhensonweather

6 years

Another reminder of how truly unusual #Florence is: No hurricane on record within 200 miles of Florence's location on Friday has come close to the U.S. East Coast before. Unusual paths can produce outcomes that history doesn't prepare us for.

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Bob Henson

@bhensonweather

4 years

Ahh, Denver...

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Bob Henson

@bhensonweather

5 years

Lihue has set or tied its record high on the last 17 consecutive days. That's likely unprecedented for any longstanding U.S. observing site. (Records at Lihue go back to 1905).

Weather Underground

@wunderground

5 years

#Hawaii is baking in unprecedented heat, including 17 record highs in a row at #Lihue .

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Bob Henson

@bhensonweather

6 years

The sign says it all! #WeMissNOAA #AMS2019

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Bob Henson

@bhensonweather

2 years

Instead of weakening toward an El Niño-like state, the temperature contrast across the tropical Pacific has been strengthening toward a La Niña-like state for decades now. Why, and what's it mean? @CC_Yale

A mystery in the Pacific is complicating climate projections » Yale Climate Connections

The El Niño-Southern Oscillation, which has a huge influence on global weather patterns, isn't behaving as computer models predicted. That's puzzling scientists.

yaleclimateconnections.org

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Bob Henson

@bhensonweather

1 month

Painful irony w/Helene's colossal damage in Asheville: the city recently placed #3 on a list of US cities most likely to experience "climate migration". Asheville summers are cool by Eastern standards, and annual avg precip (~36") is low for the region.

Asheville ranks on list of cities most likely to see impact of 'climate migration'

Migration due to climate change may land Asheville a lot of new residents in coming years according to a sustainable real estate expert.

www.citizen-times.com

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Bob Henson

@bhensonweather

6 years

Today’s 114F is the hottest temperature ever recorded in Waco, where records go back to 1901.

NWS Fort Worth

@NWSFortWorth

6 years

5:03 pm: Waco has reached 114 degrees and broken its ALL TIME record high temperature of 112 set on August 11, 1969. #ctxwx #txwx

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Bob Henson

@bhensonweather

6 years

If the latest NHC forecast comes to pass, #Florence will be the only hurricane on record to make a Cat 4 U.S. landfall so far north. The dramatic slowing on Friday, and the implied risk of extreme rainfall, is the other very concerning detail on this map.

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Bob Henson

@bhensonweather

4 years

I am super-excited to be joining the YCC team of contributors!

Climate Connections

@CC_Yale

4 years

Pleased to announce that Weather Underground co-founder Jeff Masters and 'Rough Guide to Climate Change' book author Bob Henson joining as regular authors for @CC_Yale

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Bob Henson

@bhensonweather

4 years

After watching daily weather maps for many years, it's not often that an emerging pattern stops me in my tracks. This one is just plain, flat-out, take-no-prisoners weird! And awfully El Niñoish, given the moderate/strong La Niña conditions now in place. 🤔

Mike Ventrice

@MJVentrice

4 years

Impressive

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Bob Henson

@bhensonweather

3 years

#Ida is barely a blip on some of the highest-profile news websites right now. That will change. Still, we're going into a weekend, and Ida will be competing with Afghanistan and COVID. Simultaneous big stories are always a media challenge.

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Bob Henson

@bhensonweather

7 years

How often do you see a high temperature anywhere that's 64°F above normal?? Omolon, Russia, smashed its all-time Jan. record with Monday's high of 3°C (38.4°F). Average daily high this time of year in Omolon is -32°C (-25.6°F).

Etienne Kapikian

@EKMeteo

7 years

Extrémité est de la #Sib érie ce 29 janvier : plusieurs localités > 0°C. 3.0°C à Omolon, RECORD MENSUEL et +35°C/normale ! (cf. graphe) Localement 4 à 6°C, comparable aux 5.4°C observés à Montauban, France, ce lundi ! souvent +15 à +35°C/normales sur la région.

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Bob Henson

@bhensonweather

6 years

Great visualization of today's record-smashing 24°C (75°F) reading in Tofino, British Columbia (Vancouver Island). It's an unprecedented temp for any date outside the May-to-October window.

Tyler Hamilton

@50ShadesofVan

6 years

This might put the Tofino stat in a better visual perspective, temperature approximately 5 standard deviations above normal for March 19th (CYAZ). This temperature would also beat a couple daily records in the month of June. (Graph: @datawithZ ) #BCheat

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Bob Henson

@bhensonweather

8 years

The last time a hurricane developed and made landfall in Florida, Twitter did not exist.

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Bob Henson

@bhensonweather

2 years

How hot was July? More than 300 long-term weather stations in the U.S., Europe, and Asia had the hottest temperatures they've ever recorded. @CC_Yale

July 2022: Earth's 6th warmest July on record » Yale Climate Connections

An astonishing 329 weather stations with long-term periods of record broke (not just tied) their all-time high temperature records.

yaleclimateconnections.org

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Bob Henson

@bhensonweather

6 years

WIth a Thursday high of 115.9°F, Adelaide has just notched the highest temperature ever recorded in any of Australia's state/territorial capitals.

Bureau of Meteorology, South Australia

@BOM_SA

6 years

#Adelaide is now the hottest capital in Australia, having just reached 46.6C at 3:35pm, beating the previous record in #Melbourne of 46.4 @BOM_Vic More records: Whyalla 48.5 (prev. record 48.0), Leigh Creek 46.9 (prev. 46.3), and Port Augusta 49.1 (prev. 48.9) #heatwave

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Bob Henson

@bhensonweather

7 years

Disruptive tidal flooding that now affects the U.S. Gulf and Atlantic coastlines on 3-6 days per year will strike as often as 80-180 days a year by the 2040s, according to a major report from NOAA

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Bob Henson

@bhensonweather

2 years

Given the absurdly warm sea surface temperatures between Bermuda and Atlantic Canada, I can't help wonder if an event this far from average (10 standard deviations?!) would be virtually impossible w/out AGW. Post-storm research should help tell us.

Kaylan Patel

@WxPatel

2 years

To this in perspective, a pressure of 930mb at this latitude would equate to a standard deviation pushing 10 sigmas below normal. It's hard to state how anomalous this event will be for the Canadian Maritimes.

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