Philippe Papin @pppapin Twitter profile

Last Seen Profiles

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@N_Miyaki

@HacerZeki

Philippe Papin

@pppapin

3 years

Everyone has been sharing the incredible satellite footage of ongoing #volcano eruption in Tonga, but wanted to share larger scale view. You can still see the shockwave traveling out rapidly to the east (though unclear if its now sfc based or aloft). Jaw dropping! 🌋🛰

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Philippe Papin

@pppapin

4 years

I have a big announcement. Today is my 1st day at the National Hurricane Center ( @NWSNHC ) as a new member of the Hurricane Specialist Unit! This is my dream job, & I am humbled to work for @NOAA / @NWS helping forecast to protect life & property. So grateful for this opportunity🙏

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Philippe Papin

@pppapin

5 years

Feast your eyes on this full day 1-min resolution GOES-16 visible animation of #Hurricane #Dorian as it rapidly intensified from a Category 2 (90kt) to Category 4 (120kt) hurricane today. Incredible "stadium effect" with the #eyewall at the end of the animation. So mesmerizing.

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Philippe Papin

@pppapin

6 years

Here is a full-day loop of #Hurricane #Florence from the #GOES16 mesoscale sector over the #TC . No matter how many times you see it, it's still mesmerizing to watch the #eye clear out & watch the rapid motion of mesovortices within the eye.

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Philippe Papin

@pppapin

3 years

Certainly one of the largest & strongest west coast cyclones I can recall! For its location (20-40N/120-140W) it set the new minimum sea-level pressure (942.5 hPa w/ 10 kt winds). Its huge wind/rain footprint affecting the NPAC from British Columbia to California. #BCStorm #CAwx

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Philippe Papin

@pppapin

3 years

Hurricane #Sam has put on a show the last 24 hours intensifying from a Category 1 to Category 4 Hurricane. Thought it would be nice to share what that 24-h evolution looks like on 1-min res GOES-16 water vapor. Wait until the end as the 👁 fully clears out. Incredible.

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Philippe Papin

@pppapin

3 years

Want to take a moment to compare last 2 eruptions of Tonga #Volcano . Can infer ash plume hgt comparing Bt of IR/WV to near radiosonde profile. 1/13 eruption got to ~15-20 km aloft. 1/15 eruption (today) possibly >30 km! Deep Stratospheric injection likely given sat signature.

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Philippe Papin

@pppapin

3 years

Holy moly, this is one of the more incredible lightning plots I've ever seen. The spatial ring that forms after the initial plume eruption is something I've never seen before. Incredible imagery tonight coming from the #Tonga #Volvano eruption. 🌋

William Churchill

@ChurchillWx

3 years

1-min CG lightning plot of #Tonga eruption

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Philippe Papin

@pppapin

2 years

Let's talk #Fiona 's upcoming Extratropical Transition. Given current intensity of Fiona & strength of the upcoming upper-level trough dropping in, this could be a *very dynamic* warm-seclusion ET, similar to Teddy in 2020. Unfortunately this may occur near Canadian provinces.

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Philippe Papin

@pppapin

4 years

This is the most ridiculous radar loop I've seen yet. Within the same tornado warned polygon there appear to be two low CC/ high REFL debris balls that rotated around each other & merged between Springfield & Livingston, SC. Possible merger of two large tornados? Unreal. #SCwx

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Philippe Papin

@pppapin

4 years

Excited to share that as of today, I'm a NOAA/NWS employee! This month I join the Model Evaluation Group at @NWSEMC to help build new tools & products in model verification of existing & future upgrades! A bit crazy changing jobs mid-pandemic, but happy to join the @NWS team!🌍

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Philippe Papin

@pppapin

5 years

I'll say it time & time again. Numerical weather prediction enabling the ability to make reasonably accurate weather predictions 3-5 days out might be one of the biggest achievements in science over the last 50 years. Cases like #Dorian show you the value of NWP guidance.

Eric Blake 🌀

@EricBlake12

5 years

Incredible to think there is a category 5 hurricane less than 200 miles east of me, and the threat from #Dorian is judged to be low enough that there’s no warning in place for #Miami . We live in amazing scientific times!

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Philippe Papin

@pppapin

3 years

What did I do on my day off from @NHC_Atlantic today? Cheating at TD-tic-tac-toe ❌⭕️

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Philippe Papin

@pppapin

2 years

Been a busy last two weeks forecasting Hurricanes #Lisa , #Martin , & #Nicole , but my most important forecast verified this week in Seattle. ☀️ @ajda_savarin , my smarter & kinder counterpart, I have a lifetime to love you & learn from you. ❤️💍 #shesaidYes !

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Philippe Papin

@pppapin

5 years

It's been a long 10+ day odyssey since the MCV that ultimately spawned #Barry formed in Missouri. Here is a long wv loop, with Barry's track overaid in 24h snapshots. Ten days later, the remnants of Barry are nearly back where it started & interacting with a mid-latitude trough.

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Philippe Papin

@pppapin

2 years

Just want to say how appreciative we are at NHC of @NOAA_HurrHunter & @53rdWRS for tremendous efforts they provide to get us critical data. Their morning flights in extreme turbulence provided necessary data making #Ian a 135 kt Cat 4 hurricane on the 11z special advisory today.

Tropical Nick Underwood

@TheTropicNick

2 years

When I say this was the roughest flight of my career so far, I mean it. I have never seen the bunks come out like that. There was coffee everywhere. I have never felt such lateral motion. Aboard Kermit ( #NOAA42 ) this morning into Hurricane #Ian . Please stay safe out there.

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Philippe Papin

@pppapin

1 year

Plenty of media talking #Hurricane #Dora influence on #MauiFires , so worth a deep dive 🧵 quantifying overall TC impact by removing vortex. 🌀 Result ➡️ Dora played a *very* minor role, slightly enhancing low-level flow over Maui at fire initiation time.

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Philippe Papin

@pppapin

2 years

A full day GOES-16 water vapor loop shows the evolution of #Fiona completing a phase with a strong upper-level trough dropping out of Canada. The hurricane's extratropical transition is complete marked by upper-level PV wrapping cyclonically around its core. Remarkable event.

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Philippe Papin

@pppapin

4 years

Tonight I had the opportunity starting advisories on #Theta breaking 2005's record for # of named storms in a NATL Hurricane Season. It was also the 1st storm I've started advisories on since starting at NHC last month. Thanks @DBrownie23 for letting me be a tiny part of history

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Philippe Papin

@pppapin

3 years

One more animation, of 1-minute 500m visible imagery of #Ida as it begins making landfall just south of Grand Isle, LA. The #eye cleared out enough that you can see the low-level flow of the eye rapidly spinning as the TC barrels its way to shore.

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Philippe Papin

@pppapin

5 years

Zoomed in 30-second res visible view w/ lightning of #Dorian has it makes landfall in #GreatAbaco islands in the #Bahamas . I'm speechless. This tops what we saw with #Michael last year.

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Philippe Papin

@pppapin

10 months

Hard to not be extremely concerned for Acapulco, Mexico & adjacent coastal areas as #Hurricane #Otis rapidly intensified into a 145 mph Category 4 hurricane this evening. This area does not have experience with such an intense hurricane before. A very dangerous situation.

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Philippe Papin

@pppapin

3 years

Really just fascinating dynamics with #Nicholas we have been able to watch via KBRO radar today. First there was the center reformation last night. Now, two distinct vorticity maxima are rotating about a common axis. Net result: Nicholas is reorganizing as it pivots NNE. #TXwx

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Philippe Papin

@pppapin

5 years

Here is the sequel to my steering flow animated explanations. I'm covering 2 periods. 1st period is when #Dorian is expected to stall. 3 Features Cancel out: 1) Ridge over the NATL 2) Ridge over the Midwest 3) Trough that creates a weakness between the two ridges.

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Philippe Papin

@pppapin

7 years

Another deep dive into #Irma 's steering. As #TC approaches #Florida , elongated trough over US imparts local steering, causing sharp N turn.

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Philippe Papin

@pppapin

1 year

Synoptic setup 🧵 of high-profile rainfall event for the SW US in association with #Hurricane #Hilary . Offshore upper-level trough helps steer Hilary towards California, but will also provide forcing for ascent leading to heavy rains beginning well before the TC arrives. #CAwx

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Philippe Papin

@pppapin

6 years

1) Let's reason out why the #GFS tracks #Florence NE of the #ECWMF even now 3 days till verification? Look at the upper-level cirrus canopy b/c cloud-radiative feedback is important. The #GFS has a thicker & more expansive cirrus plume NW of #Florence . What is its significance?

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Philippe Papin

@pppapin

4 years

It has been quite something watching #Hurricane #Laura traverse the Gulf of Mexico the last 54h from #Cuba to #Louisiana . In that time, winds dramatically increased from 55 kt-->130 kt & the satellite presentation went from ragged due to N shear into a textbook major hurricane.

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Philippe Papin

@pppapin

4 years

Earlier the KDMX radar N of #DesMoines found some of the highest velocity data I have ever seen in a #Derecho . These values were higher than any velocity data seen w/ #Isaias last week. A very damaging & dangerous wind storm moving through Iowa. #IAwx

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Philippe Papin

@pppapin

3 years

Everyone sharing pressure traces around world, so figured I'd check my PWS in Miami to see if there was an acoustic wave signature from the #TongaVolcano eruption. Sure enough there is a 2-3 hPa spike at 930 AM EDT, matching when wave should have been propagating over. Amazing!

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Philippe Papin

@pppapin

3 years

Incredible capture of what appears to be a waterspout making landfall in #Greece in sub-freezing conditions. Also known as a "snownado." ❄️🌪️

meteo.gr - Ο καιρός

@meteogr

3 years

Η κίνηση του υδροσίφωνα στις Στενιές Άνδρου όπως καταγράφηκε από κάμερα καιρού! #κακοκαιρια #ελπις

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Philippe Papin

@pppapin

5 years

Here is today's incredible full day 1-min GOES-16 animation of #Hurricane #Dorian . Its structure has remained remarkably consistent today with no signs of an eyewall replacement cycle imminent.

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Philippe Papin

@pppapin

1 year

The sea surface temperature cooling footprint left behind by #Franklin & #Idalia is one of the more impressive I've seen. Widespread sub 26 C & a chunk taken out of the record +SSTAs in west part of the NATL basin. Something to watch if additional TCs traverse this region soon.

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Philippe Papin

@pppapin

2 years

For last 3⃣ days, we were fortunate to have both GOES-16 meso sectors centered on #Hurricane #Ian for 30 sec data for both landfalls in Cuba & Florida. Here is yesterday's full day visible loop. Amazing how quickly eye cleared coming off Cuba & then clouded over as an ERC begin.

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Philippe Papin

@pppapin

5 years

Concerning short term trends with #Dorian tonight. The storm for the last 4 recon fixes has been consistently moving south of due west. This was suggested as a possible solution by a few members in the ECMWF ensemble guidance the last few days & it is verifying.

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Philippe Papin

@pppapin

2 years

There was an impressive left moving cell that produced some severe hail in Kendall & South Miami at around 650pm. From apartment rooftop in Doral there was some modest rotation as cell passed to my SE. Fizzling out now, but made for an ominous view. #FLwx @NWSMiami

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Philippe Papin

@pppapin

3 years

For posterity, here is a 24-h+ loop of #Ida making landfall in Louisiana. You can see the attempt of an ERC right before landfall & very slow decay moving over the marshes of SE LA. The eye also remained distinct up until moving poleward of #NewOrleans . A devastating storm.

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Philippe Papin

@pppapin

3 years

It's been a long journey for #Hurricane #Sam , maintaining major hurricane intensity over the past week! Its conclusion as a TC will likely be highly dynamic undergoing "warm seclusion" type extratropical transition resulting in a substantial wind field expansion. Watch below👇

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Philippe Papin

@pppapin

4 years

Got lucky again on my run again this evening & witnessed a fantastic double rainbow going across the sky over Monterey Bay. The atmosphere is providing a wonderful tribute for Paul Vasquez aka #DoubleRainbowGuy 🌈

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Philippe Papin

@pppapin

4 years

Still in absolute awe looking at tonight's water vapor imagery over the Southern US. In the last hour, Amarillo, TX reported thunder #snow w/ a TROWAL N of the cutoff cyclone. Meanwhile, #Hurricane #Zeta remains impressive w/ >100-mph gusts still being observed on the MS coast.

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Philippe Papin

@pppapin

6 years

This is up there with one of the more impressive reflectivity signatures from a WSR-88D before. Incredible signature in SE #Wyoming of what is likely a very large rain wrapped #tornado .

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Philippe Papin

@pppapin

2 years

Up there with some of the worst storm surge footage I’ve ever seen. My heart hurts for all the people that have been affected by #Ian so far. 💔😞

Max Olson

@MesoMax919

2 years

Absolutely heartbreaking footage captured by our surge probe of catastrophic storm surge washing away homes. I have never seen anything like this. We have now left the area as hoards of emergency crew have arrived. #HurricaneIan FULL VIDEO -

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Philippe Papin

@pppapin

11 months

At long last, #Philippe (the storm, not the forecaster) completed its life as a tropical cyclone today, as it merged w/ a developing non-tropical low. It spent 14 days as a tropical storm -- the longest-lasting continuous NATL TC to never intensify to hurricane intensity.

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Philippe Papin

@pppapin

5 years

Here is a 2-day radar animation of #Dorian from KAMX (1000 UTC 1 Sep - 0332UTC 3 Sep). Watch the eye come into view, undergo an ERC over #GrandBahama island & then remain stationary for the rest of the day as it slowly degrades & broadens from ocean upwelling / land interaction.

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Philippe Papin

@pppapin

5 years

Okay, let's do a steering diagnosis of #Hurricane #Dorian ! This is Part 1, focused on its 1st bend west & slowdown in motion. Key Features: 1) Deep-layer ridge to the N 2) Small cutoff low to the SW 3) PV streamer off to the NE 4) Ridge produced by Dorian's own outflow to the SE

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Philippe Papin

@pppapin

4 years

Really potent setup on tap this weekend for entire Eastern US. The potent upper-level low thats been giving SoCal unsettled weather will finally ejects east & phase w/ another incoming northern stream trough. End result: a large baroclinic cyclone that deepens to <970-hPa!

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Philippe Papin

@pppapin

2 years

Sharing this super long KBUF radar loop from 23 to 26 December 2022. Nearly 72 hours of continuous lake effect snow & many of those hours under Blizzard conditions & near zero visibility. A historic Buffalo Christmas Storm that many won't soon forget. ❄️🌬 #NYwx

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Philippe Papin

@pppapin

5 years

With talk of a record breaking low forming in the Great Plains this week, I thought I'd make a animation illustrating the evolution. In short: Two +PV anomalies phase in the Rockies, initiating sfc cyclogenesis in the lee. Min pressure in low 970's may rival records in the area.

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Philippe Papin

@pppapin

6 years

Latest recon center pass for #HurricaneMichael ... minimum extrapolated pressure was 919.9-hPa. My jaw just hit the floor.

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Philippe Papin

@pppapin

3 years

The lifespan of #Hurricane #Henri was certainly a bit out of the ordinary. From non-tropical origins, to looping around Bermuda, successfully battling shear, & finally hooking back to landfall in the NE US, it had quite an odyssey for a TC spending life in the subtropics.🌀

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Philippe Papin

@pppapin

4 years

Exciting times for me as today is my first @NHC_Atlantic day-shift helping out with tropical weather outlooks & advisories for #Epsilon . Thanks to @EricBlake12 & @DBrownie23 for showing me the ropes!

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Philippe Papin

@pppapin

3 years

Extratropical Transition ( #ET ) comes in many shapes & sizes. #Hurricane #Sam 's ET-merger with a mid-latitude cyclone is certainly on the larger size of the spectrum. The resulting circulation stretches more than 25 degrees of longitude over the North Atlantic! Watch below 👇

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Philippe Papin

@pppapin

6 years

This is a hall of fame tropical weather outlook map right here. I've never seen anything like this! #Florence , #Helene , #Issac , #95L , #96L , & lets just throw in another 20% baroclinicity induced system for the heck of it. Yes its peak season, but this is getting ridiculous.

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Philippe Papin

@pppapin

2 years

Somebody earlier was mentioning similarities between #Hortense (1996) & #Fiona today. Well, the IR satellite imagery unfortunately bears this out. A near carbon copy of each other on IR when their centers were just W of #PuertoRico . Both produced devastating flooding.😨

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Philippe Papin

@pppapin

2 years

Remember when we had a Major Hurricane "drought" for U.S. landfalls from 2006-2016? Seems like a long time ago now...

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Philippe Papin

@pppapin

4 years

Watching the last 72h water vapor animation of #Epsilon from genesis to major hurricane is mesmerizing. Starting on 00z 20 Oct, deep convection focused near the center & helped build an anticyclonic cocoon of moisture; shielding it from very dry air rotating around cyclonically.

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Philippe Papin

@pppapin

3 years

An unusually long-lived subtropical cyclone ( #Medicane ) traversed the Mediterranean Sea in 9 days (23 Oct-2 Nov), affecting Tunisia, Malta, Sicily, Libya, & finally Turkey in its wandering route E across the basin. Here is its entire lifecycle annotated. Imagery via @zoom_earth

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Philippe Papin

@pppapin

5 years

This is the first I've seen #SAR instruments using satellite borne radar to see flooded areas though clouds. This is a sobering view of #GrandBahamas earlier today. #Dorian 's storm surge is evident over the north side. More than 50% of the land in this photo is underwater.

ICEYE

@ICEYEfi

5 years

#HurricaneDorian has affected Bahamas heavily on Monday, with vast areas hit with #flooding , including the Grand Bahama International Airport, Freeport. ICEYE #SAR satellite image from 11:44AM local time. Please, stay safe! (Y: coastline. W: roads. Source: OpenStreetMap.)

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Philippe Papin

@pppapin

5 years

Here is an annotated 48-h wv animation of the #bombcyclone . The rapid deepening & sheer size of this cyclone was supported by the complete phasing of two troughs on the subtropical & polar jet stream over the Rockies. An incredible system well forecasted 5 days in advance!

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Philippe Papin

@pppapin

5 years

Zooming out on the western hemisphere, there are 5 systems being monitored by the National Hurricane Center right now ( #Juliette , #Dorian , #91L , #92L , & #93L )! Certainly working overtime this #LaborDay !

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Philippe Papin

@pppapin

3 years

Watch this mesmerizing 21-h water vapor loop of #Hurricane #Felicia developing annular characteristics. Thanks in part to Felicia's annular structure under light easterly shear, the TC has been resilient, & in fact the CDO has cooled again during the diurnal max. Tiny mighty 🍩

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Philippe Papin

@pppapin

3 years

This morning's 0524 UTC AMSR2 microwave pass of #Larry is a work of art. Rare to see such symmetric structure from such a large single eye & eyewall w/ little outer banding. Big & beautiful (and far away from land 👍)

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Philippe Papin

@pppapin

6 years

Zooming in, the structure of #Michael 's #eyewall has become very impressive. A obvious wavenumber 5 pattern has developed with the eyewall, with these points representing mesovortices rotating cyclonically around. These features can locally enhance winds in the eyewall.

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Philippe Papin

@pppapin

4 years

Wanted to rewind to see key synoptic elements responsible for the Central US cold air outbreak. Ridge building over Alaska & SE Canada dislodged a TPV complex into S Canada, where it persisted more than a week as the air mass grew colder before it was diverted S the Central US.

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Philippe Papin

@pppapin

5 years

Here is a longer KGRB radar animation of the last night's MCS that rolled through Wisconsin. It is still fascinating to watch how as the supercell merges with the main line, with the vorticity growing upscale into a large MCV by the time the line gets to Lake Michigan.

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Philippe Papin

@pppapin

10 months

Unfortunately the eyewall of Category 5 #Hurricane #Otis is nearing landfall & still appears likely to directly impact #Acapulco , #Mexico . Estimated winds 165 mph as of 05 UTC. A Category 5 hurricane has never made landfall on the Pacific coast of Mexico before.

NHC Eastern Pacific

@NHC_Pacific

10 months

12 AM Update: Eyewall of Category 5 Hurricane #Otis moving ashore near Acapulco, Mexico. Maximum winds are estimated to be 165 mph. Otis is forecast to remain a category 5 hurricane through landfall within the next few hours

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Philippe Papin

@pppapin

4 years

Hard to not be concerned for #Nicaragua tonight with #Iota becoming better organized over the warm Caribbean waters. Forecasted to become a major hurricane tomorrow & unfortunately impact nearly the same communities devastated by #Eta less than two weeks ago. 😟

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Philippe Papin

@pppapin

7 years

I am pleased to announce my #PhD #dissertation has been successfully defended!👨🏻‍🎓I couldn’t get the livestream going but did get a video to edit later. As for now it’s time to celebrate 😎

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Philippe Papin

@pppapin

3 years

Well that escalated quickly. Surrounded by near -90C cloud tops, #Rai is clearing out a pinhole eye & the latest JTWC forecast now takes the system to Cat 5 intensity. Unfortunately happening at the worst time possible with impact in the #Philippines in ~12 h.

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Philippe Papin

@pppapin

4 years

The RI of #Hurricane #Delta has been stunning to watch this morning. However, worth zooming out & witnessing one of the more unusual vortex interactions playing out today. While PTC #Gamma is much weaker, its similar in size to #Delta . Their combined circulation is large!

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Philippe Papin

@pppapin

10 months

This is quite the radar animation for S Florida & thr Florida Keys right now. Multiple low topped supercells merging into a formative MCV north of Marathon Key. Vorticity galore. 👀 #FLwx

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Philippe Papin

@pppapin

1 year

Quick radar breakdown of how #Hurricane #Idalia 's core evolved in the hours before landfall in the Florida Big Bend region. As several mentioned, an eyewall replacement cycle appeared to begin just before landfall. There were some telltale signs on radar beforehand. 👇

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Philippe Papin

@pppapin

5 years

What a remarkable evolution seen offshore of North Carolina from the KMRX radar this afternoon. The coastal cyclone rapidly intensified as supercellular convection provided incipient vorticity that grew upscale into the synoptic cyclone. Gale force + winds likely offshore. #NCwx

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Philippe Papin

@pppapin

3 years

Put together a 48-h WV loop over #Larry since becoming a major #hurricane . You can see the obvious growth in size over time as the inner-core has gone through several eyewall replacement cycles. 👁️♻️ Also note the subtle SW shear maintaining a touch of outflow asymmetry as well.

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Philippe Papin

@pppapin

3 years

A brief summary of my twitter feed today on my day off. #Larry #Chanthu #wxtwitter

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Philippe Papin

@pppapin

4 years

Hurricane #Laura & #Delta 's eyewalls in the same exact location just 6 weeks apart. Not my favorite instance of weather #DejaVu . 😟 My heart goes out to all the folks in #Louisiana , especially #LakeCharles dealing with yet another impactful storm.

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Philippe Papin

@pppapin

3 years

The shockwave from the #Tonga #Volcano (Hunga Tonga-Hunga Ha’apai) eruption has now reached New Zealand. Note the rapid rise and fall from the pressure trace at the end of the plot. We haven’t seen a volcano eruption of this intensity in a long time.

David B

@dbanksnz

3 years

@MetService From my weather station in Howick!

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Philippe Papin

@pppapin

4 years

In addition to impressive satellite imagery seen with now Major #Hurricane #Eta , there is also an inner core lightning burst that's encircling the eyewall on GLM. The lightning appears in the eye, because the eyewall is sloped inward & likely is smaller than satellite estimates.

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Philippe Papin

@pppapin

4 years

Yet another incredible example of inner core lightning with a very powerful hurricane, this time being featured on the latest category 5 hurricane and on record. #Iota

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Philippe Papin

@pppapin

4 years

This is just downright spooky. Same day, same location, just 16 years apart. As I always say, weather sure does love #DejaVu

Stu Ostro

@StuOstro

4 years

#Sally #Ivan

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Philippe Papin

@pppapin

2 years

This has unfortunately quickly become a dangerous hurricane over the past 24 hours. Hurricane Warnings up for Islas Marias & Mainland Mexico as Cat 4 #Orlene approaches.

NHC Eastern Pacific

@NHC_Pacific

2 years

Hurricane #Orlene Advisory 15A: Extremely Dangerous Category 4 Hurricane Orlene Continues Northward. Significant Wind, Storm Surge, and Rainfall Impacts Expected in The Islas Marias and Portions of Southwestern Mexico.

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Philippe Papin

@pppapin

4 years

The structure of #Cristobal remains very broad, with the lack of an inner wind core where convection can focus. What it lacks in core structure it makes up in sheer size, with its circulation spanning the entire Gulf of Mexico!

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Philippe Papin

@pppapin

3 years

Even before the core of #Henri nears the coast, there has been major flooding in New York City as seen on radar (via @NissenbaumMark ). PRE-like event driven by tropical moisture transport around Henri lifted at coast by favorable jet dynamics near a negatively tilted trough.

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Philippe Papin

@pppapin

5 years

Another indication that #Hurricane #Dorian is intensifying today is the marked increase in lightning within the eyewall. The last few frames shows a circular ring of lightning rotating around the storm, indicating intense convection.

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Philippe Papin

@pppapin

3 years

Simply mesmerizing to watch a full day 1-min GOES-16 visible animation of Major #Hurricane #Larry . The eye especially is spectacular w/ obvious mesovortices rotating around along its outer edges. 🌀

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Philippe Papin

@pppapin

7 years

Incredible 1-min #GOES16 visible imagery of #Irma . Incredibly destructive storm barreling towards #StJohns & #Barbuda to the left.

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Philippe Papin

@pppapin

5 years

Yesterday between 700-730pm, I captured this amazing timelapse over Monterey of Kelvin-Helmholtz instability waves in the low-level clouds. These waves are caused by vertical shear between the fast winds in the clouds vs. slower winds above. @CityofMonterey @NWSBayArea @ksbw

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Philippe Papin

@pppapin

5 years

1) Let's talk about Invest #92L & where it may ultimately go. As usual, there are different features influencing the motion of the storm. Beginning with a GFS animation showing the 3 features likely to impact 92L track; The Rockies ridge appears to have the largest impact.

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Philippe Papin

@pppapin

3 years

Sustained winds of 149 MPH gusting to 172 MPH as #Ida was making landfall. This is an incredible observation if verified. It is incredibly rare for a surface in-situ platform to record winds that essentially match the maximum sustained winds of a Category 4 hurricane.

NWS New Orleans

@NWSNewOrleans

3 years

@SteveWAFB @ulmwxr Here is the observation we received.

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Philippe Papin

@pppapin

5 years

In addition to its recent upgrade to a #Category5 hurricane, #Dorian 's structure on a recent ASMR2 microwave pass is jaw dropping. A very symmetrical thick eyewall is seen on the 85GHz channel with still no sign of a secondary eyewall.

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Philippe Papin

@pppapin

3 years

Watching #Larry undergo extratropical transition really shows you how much a large TC can perturb the downstream waveguide. In its place is a large SW-to-NE orientated PV streamer taking up a large portion of the subtropical Atlantic. A temporary respite in TC activity.

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Philippe Papin

@pppapin

5 years

The mesovort recon was making center fixes on #Barry earlier has dropped back south into the convection. Sometimes, this convective coupling helps the mesovort grow upscale & realign the llvl vortex w/ the mid-level center. Will be watching the next 3-6hrs to see if this occurs.

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Philippe Papin

@pppapin

4 years

Well this is interesting. There appears to be a convective mesovortex that has organizing over Lake Erie this morning, complete with banding features. Water temps are well above normal on the lake and are likely supporting sustained deep convection.

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Philippe Papin

@pppapin

8 years

Went chasing with @AliciaMBentley and found a fantastic rotating wall cloud w/ a #SVR warned #storm n/ Albany! #nywx

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Philippe Papin

@pppapin

4 years

There are *7* features on the NATL tropical weather outlook from @NHC_Atlantic this morning. I am pretty sure that is a record. Even for peak season this is getting ridiculous. 🥴

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Philippe Papin

@pppapin

3 years

Thanks to ERA-5 reanalysis, we can take a detailed look back at this historic event.❄️ Arctic front pushed through early on 1-19-77, but most of the #snow in extreme S Florida was generated behind via ocean effect precip. Simulated 850 hPa T down to -4C in #Miami is nuts! #FLwx

NWS Miami

@NWSMiami

3 years

On this day in 1977, snow fell in #SoFla for the first time in recorded history, from West Palm Beach to Homestead, and even across the Gulf Stream on Grand Bahama Island! If you saw it, please share your story with us!

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Philippe Papin

@pppapin

6 years

On my flight from Seattle to San Jose, I traveled through the #AtmosphericRiver landfalling over Oregon & California. Halfway through, there was a sharp edge to the high-level cloud deck, which was also easily seen via #GOES17 . Always fun to match flight photos w/ sat imagery 🙂

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Philippe Papin

@pppapin

6 years

1) Lets talk #90L , the 1st invest of the NATL season. A unique aspect of this system is its broad circulation & ample moisture, features of its monsoonal origin; resembling a Central American Gyre ( #CAG ) in the #GoM this week. In this thread, I want to highlight key CAG aspects.

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Philippe Papin

@pppapin

4 years

Here is a full day GOES-17 geocolor loop centered near the #CreekFire . Probably the #PyroCb event of the year in #California . PyroCb initiated around 1900 UTC w/ lightning & extreme fire behavior at 2100 UTC. Extent of the fire shows up in black at end of loop. #CAfire #CAwx

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Philippe Papin

@pppapin

4 years

Really was fascinating watching the radar this morning as Tropical Storm #Bertha formed before our eyes. Check out the two "vortical hot towers" (fancy name for supercells) merging between 900-1100 UTC & likely aiding the formation of tightly curved bands leading to TC genesis.

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