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Clark Evans Profile
Clark Evans

@ClarkEvansWx

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Research Physical Scientist and Model Physics Branch Chief @NOAAGSL . Adjunct Professor @UWMAtmoSci . Constantly striving to help those around me flourish.

Colorado Front Range
Joined October 2016
Don't wanna be here? Send us removal request.
@ClarkEvansWx
Clark Evans
1 year
The Florida Forgotten Coast and Big Bend are some of the most surge-prone areas in the world. The terrain is essentially flat inland a long way from the coast. The NHC’s storm surge maps for a category 4 hurricane show the potential for 6-9+ feet of surge 10 miles inland. #Idalia
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@ClarkEvansWx
Clark Evans
2 years
“In Wisconsin…while 62% worry about climate change & support policies, they believe they are in the minority, thinking that only 42% share the same concerns. In fact, surveys show that the majority of people care about climate change in every county.”
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@ClarkEvansWx
Clark Evans
7 years
Not bad, @NHC_Atlantic . Not bad at all. This sort of skill for #Irma would have been unthinkable years ago. I'll post an example next...
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@ClarkEvansWx
Clark Evans
4 months
It is with both excitement and melancholy to announce that I've accepted a position with @noaagsl in Boulder! I will be leading their model physics development branch in the Earth Prediction Advancement Divisions. I've got much to learn but am excited about the opportunity. (1/x)
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@ClarkEvansWx
Clark Evans
3 years
I annotated the first of these photos with major roads (blue lines + all-caps white road names) & geographic features (standard-case white text). The photo was taken just south of Superior, making it a bit easier to identify specific features there vs. Louisville. #MarshallFire
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@Amy_Leedham
Amy_Leedham
3 years
Just flew over the #marshalfire and wanted to share these images in case it helps anyone looking for information on the status of the fire / their property
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@ClarkEvansWx
Clark Evans
4 years
The first part of this week brought some sad news, but the end of the week brings much happier news: my case for promotion to Professor was unanimously approved this afternoon!
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@ClarkEvansWx
Clark Evans
1 year
Supporting open science and education, I'm taking a leap and publicly releasing my first-semester Synoptic Meteorology course's labs to the world! These labs incorporate Jupyter Notebooks (hosted on a local JupyterHub) for meteorological analysis!
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@ClarkEvansWx
Clark Evans
3 years
If you know, you know. I love this plate so much. Spotted in Ozaukee today. #BucksIn6
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@ClarkEvansWx
Clark Evans
3 years
Zoomed-in view with a few additional roads and points of interest highlighted. The fire's extent makes it difficult to reliably identify roads in Louisville N of 36. See the quote-tweeted post above for more context. #MarshallFire
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@ClarkEvansWx
Clark Evans
2 years
Now that it’s public, I’m excited to share that I’ve been appointed as the @ametsoc STAC Incoming Commissioner starting in January! I look forward to working closely with the other commissioners (incl. @profdesai ), boards and committees, and AMS Council over the next 6 years!
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@ClarkEvansWx
Clark Evans
3 years
The current SPC Day 2 outlook is clearly just the shallow water response to a heating source symmetric on the equator from Gill (1980).
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@ClarkEvansWx
Clark Evans
4 years
I've updated my list of atmospheric science/meteorology research internship programs for 2021: STUDENTS: these are a great way to gain research experience while getting paid to do so! MENTORS: please share and let me know of any programs I've missed!
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@ClarkEvansWx
Clark Evans
1 year
While much of the discussion surrounding #Hilary is rightly focused on its impacts (rain/flooding, wind) to Baja California and the southwest United States, it's also likely to contribute to the excessive heat forecast across the central United States next week. 🧵 (1/6)
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@ClarkEvansWx
Clark Evans
7 years
The locals know we’re here. #ams2018
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@ClarkEvansWx
Clark Evans
6 months
Wisconsin. February 8th. NOT NORMAL! (For reference - Wisconsin has *never* had a recorded tornado in February.) #wiwx
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@ClarkEvansWx
Clark Evans
2 years
The upcoming extratropical transition of #Fiona is likely to be an instant warm-seclusion, where it becomes extratropical before losing its low-level warm-core structure. A climatology of these events is in-press with @MonWeaRev :
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@ClarkEvansWx
Clark Evans
6 years
Confirmed: I did *not* hit my head against the tropopause this morning. Thanks to all who reached out to express their concern!
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@ClarkEvansWx
Clark Evans
4 years
Have you ever felt incredibly angry and incredibly sad at the same time? That’s how I feel right now as my state spirals toward an inevitable, yet completely avoidable, public-health catastrophe. Wreckless.
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@ClarkEvansWx
Clark Evans
3 months
Everyone else: <gawks at the upscale growth into a bona-fide bow echo> Me: “That sure looks like a secluding midlatitude cyclone with midlevel dry slot there at the very end of the loop…”
@mark_debruin
Mark De Bruin
3 months
Panning radar scans/storm reports from yesterday's crazy merging MCS in Kansas. Love all the cold pool dynamics that radar reveals.
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@ClarkEvansWx
Clark Evans
4 years
Not going to lie, I'm feeling a bit melancholy after e-mailing my class tonight to fill them in on shifting our class to online delivery for the rest of the semester. I *like* my students and I *like* teaching them! Online just won't be the same.
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@ClarkEvansWx
Clark Evans
4 years
This is an important analysis that I enjoyed reviewing and am glad to see published. It illustrates the anemic funding support for graduate students across the field. We need to take action to improve this. (1/2)
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@ClarkEvansWx
Clark Evans
3 years
Young atmospheric scientists, please be assured that people see and appreciate you when you act in kindness, display humility, own your mistakes, and disagree in good faith. We may not publicly acknowledge those times nearly as often as we should, but we see them. Take heart.
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@ClarkEvansWx
Clark Evans
1 year
I’m also excited to share my collection of tropical meteorology lectures! These are targeted at jr/sr undergrads and early-stage graduate students. As they are from a one-semester course, some advanced topics are missing. Still, I hope these are useful!
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@ClarkEvansWx
Clark Evans
2 years
Students - are you looking for a research-based internship this summer, whether an REU program or something at a federal lab? I've compiled an extensive listing of research-based internships on my website: #AMS2023 #AMSStudent2023
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@ClarkEvansWx
Clark Evans
6 months
Bow echo genesis over northern Illinois this evening. Quite the nice northern line-end vortex!
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@ClarkEvansWx
Clark Evans
1 year
I'm excited to share that I've been appointed as a Trustee of the Village of Grafton, WI! For those who aren't familiar with Wisconsin government, Village Trustees are the equivalent of City Councilors. I was sworn in this morning and I'm excited to get started! (1/3)
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@ClarkEvansWx
Clark Evans
2 years
The infamous #AMS2023 laughing escalator.
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@ClarkEvansWx
Clark Evans
4 years
Over the last three days prior to landfall, most @NHC_Atlantic forecasts of Laura’s track had an error of less than 25 nautical miles (or about 30 statute miles; white-shaded boxes in the left panel). It doesn’t get much better than that.
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@ClarkEvansWx
Clark Evans
5 years
So, I got an e-mail today titled, "I turned your paper into a song." Turns out, it's legit! The abstract from my 2014 @ametsoc #WeaForecasting paper with @DVDFortyTwo and @ToddLericos was put to music. Why, I don't know. But there's a first for everything!
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@ClarkEvansWx
Clark Evans
6 years
My neighbors and I made a deal this winter. We’d be gone for 3 weeks in December and they’d shovel snow for us as needed. They’d be gone for 2 weeks in January, and we’d reciprocate. It snowed a half-inch while we were gone. It’s snowed almost two feet since they’ve been gone.
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@ClarkEvansWx
Clark Evans
10 months
It's not lost on me that the $480k cost of this unnecessary UW System "rebrand" could have covered five years of Innovative Weather's operations and thus ~35 students' professional and personal development.
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@ClarkEvansWx
Clark Evans
7 months
Taylor Swift will be in Baltimore next Sunday. Here’s why that’s bad news for the American Meteorological Society.
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@ClarkEvansWx
Clark Evans
4 years
Me, describing today’s SPC forecast evolution to my wife: “It started out as a marginal risk, the lowest of the severe categories, then went through slight to enhanced to moderate risk...” My wife: “Wait, moderate is higher than enhanced??” Meteorologists everywhere:
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@ClarkEvansWx
Clark Evans
3 years
“I don’t want to change who people are or what they believe. It’s a case of showing them that they already care about this — and already believe what they need to in order to make a difference.” - @KHayhoe
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@ClarkEvansWx
Clark Evans
2 years
As the students taking synoptic 2 with me this semester will soon learn, I love me a good frontogenetic deformation pattern! Pack those isotherms across the central United States! (though please keep the 32°F one to my north through Thursday kthx)
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@ClarkEvansWx
Clark Evans
3 years
Exceptional @NHC_Atlantic forecasts for Ida, with both track and intensity forecasts more skillful vs. climatology+persistence than the 2015-19 and 2020 averages. Images from @HurricaneModels . (I’ll get around to adding those curves on the first two plots someday…)
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@ClarkEvansWx
Clark Evans
5 years
Crazy weather impacts to @LeTour this afternoon: a thunderstorm dropped accumulating hail on the road to the final mountain climb of today's stage. Snowplows have attempted to clear the road, but it's not fast enough and the stage has been neutralized. Wow!
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@ClarkEvansWx
Clark Evans
3 years
In case they're helpful to anyone, I've put together a series of Jupyter Notebooks that use wrf-python (and related packages) to visualize WRF-ARW model output. Some examples follow...
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@ClarkEvansWx
Clark Evans
5 years
Before any winter storm, I see many AFDs & social-media posts say, “the disturbance is still over the North Pacific and won’t be sampled by radiosondes for X days,” implying that the forecast needs the balloon data to anchor in on a solution. Isn’t that outdated thinking, though?
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@ClarkEvansWx
Clark Evans
2 years
I decided to use the data from the recent @Nature "Quantifying hierarchy and dynamics in US faculty hiring and retention" article to assess: where did faculty in Atmospheric Sciences & Meteorology at PhD-granting universities receive their PhD? Top 10 (32.5% of 1525 faculty):
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@ClarkEvansWx
Clark Evans
3 months
My piece de resistance - the view from my back deck about 2:15a CT. P.S. this view can be yours - buy my home! 😅 #aurora #Auroraborealis
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@ClarkEvansWx
Clark Evans
3 years
Update:
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@ClarkEvansWx
Clark Evans
3 years
👀👀👀 "The romantic drama revolves around the life and love stories of people working at the Korea Meteorological Administration." #wxtwitter
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@ClarkEvansWx
Clark Evans
7 months
#AMS2024 is the 20th anniversary of my first AMS Annual Meeting - the 84th in Seattle in 2004. I’ve now been attending the Annual Meeting for half of my life(!). I’m looking forward to seeing old friends and making new ones this week. Here’s to a great conference!
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@ClarkEvansWx
Clark Evans
1 year
Following on Tomer's analysis, one can quantify #Dora 's direct contributions to the wind over Hawaii. If you take the rotational flow unique to Dora (1st image) you can obtain the wind solely due to that flow (2nd image)! This is done through "vorticity inversion." (1/2)
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@ClarkEvansWx
Clark Evans
1 year
Tropical cyclones interacting with the midlatitude flow can, depending on the nature of that interaction, influence the large-scale weather downstream (generally east) of that interaction. Keller et al. (2019, @MonWeaRev ) discusses this in detail: (2/6)
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@ClarkEvansWx
Clark Evans
4 months
There's more I could say, but I'll close with this: I'm so proud of our students and everything we've been able to do in my 13 years at UWM. I'm excited about my opportunity with GSL, but deeply sad about the end at UWM. (end)
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@ClarkEvansWx
Clark Evans
3 years
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@ClarkEvansWx
Clark Evans
3 years
90% of computer-based scientific research is debugging errors.
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@ClarkEvansWx
Clark Evans
7 months
#AMS2024 Student Conference attendees, please join me after lunch in Rm. 338 for the Conversations with Professionals session! I’m happy to share all about the #academiclife , #gradschool , my journey, and more!
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@ClarkEvansWx
Clark Evans
10 months
#Philippe 's track errors were large - but how large were they compared to what you'd expect? Quite large. The five-year NHC average forecast improvement vs. climatology and persistence is between 45-75% at all lead times. For Philippe, it never exceeded 25%.
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@ClarkEvansWx
Clark Evans
2 years
Lot of talk about the “map room” in the Synoptic-Dynamic Meteorology session of the Education conference today. My lukewarm take, shared in part by at least one presenter: Twitter is the modern map room. #AMS2023
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@ClarkEvansWx
Clark Evans
3 months
Today was the celebration of @InnovativeWx ’s 17-year legacy, during which it has facilitated the personal and professional development of over 100 atmospheric scientists! Alumni from as far as WA, CO, TX, and GA flew in to attend the event, underscoring IW’s life-changing impact.
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@ClarkEvansWx
Clark Evans
5 years
Agree 100%. Trust in the NWS among a segment of the population particularly vulnerable to high-impact weather has been eroded as a result of this press release. People WILL be hurt by this. It’s clear, too, that the weather community has lost confidence in top NOAA leadership.
@DrShepherd2013
Dr. Marshall Shepherd
5 years
The bottom line via @afreedma -- This whole scandal was getting weirder and weirder but now it's getting dangerous if people stop believing NWS forecasts because of this.
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@ClarkEvansWx
Clark Evans
1 year
This is what disinvestment in the UW System and the young people of Wisconsin looks like. It provided forecast support for Milwaukee City+County DPW, MMSD, We Energies, Milwaukee World Festival, Lake Express, UWM, Marquette, and countless others. It transformed lives and careers.
@InnovativeWx
Innovative Weather
1 year
Important news regarding our program:
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@ClarkEvansWx
Clark Evans
1 year
!!!! It’s dancing literally right above us!
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@ClarkEvansWx
Clark Evans
1 year
Apropos of nothing, #WxTwitter , but for anyone interested, my synoptic meteorology course notes, examples, and labs are freely available: Synoptic 1: Synoptic 2: Github-hosted labs are linked from these sites. Feedback welcome!
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@ClarkEvansWx
Clark Evans
1 year
Thanks to the extensive efforts of the Twitterless Michael Vossen, I'm pleased to now share our second-semester Synoptic Meteorology course's labs! These ten labs focus on QG theory, isentropic analysis, & isentropic potential vorticity. Feedback welcome!
@ClarkEvansWx
Clark Evans
1 year
Supporting open science and education, I'm taking a leap and publicly releasing my first-semester Synoptic Meteorology course's labs to the world! These labs incorporate Jupyter Notebooks (hosted on a local JupyterHub) for meteorological analysis!
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@ClarkEvansWx
Clark Evans
8 months
@wiscobirder Mandarin duck from Milwaukee’s South Shore Park in February!
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@ClarkEvansWx
Clark Evans
1 year
Jackpot.
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@ClarkEvansWx
Clark Evans
3 years
Updating lecture materials for my Tropical Meteorology class this semester brings this flashback to the time that I used Nermal from the Garfield cartoons to represent an ascending air parcel...
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@ClarkEvansWx
Clark Evans
4 months
Rather than address the fundamental root of UWM's challenges - the poor-quality education too many students receive, manifest in a 45% 6-year grad rate - campus leadership is instead quietly (for now) cutting programs, even highly successful ones. (5/x)
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@ClarkEvansWx
Clark Evans
5 years
<log on to Facebook> <see the local NWS posted about long-term ice cover trends> Voice inside my head: "don't read the comments..." <clicks to read the comments anyway> <immediately regrets having done so> <types and deletes several responses> <logs off Facebook> Sigh.
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@ClarkEvansWx
Clark Evans
3 years
One dose down, one to go. #SMASHcovid
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@ClarkEvansWx
Clark Evans
2 years
Congratulations to Dr. Kevin Prince on successfully defending his Ph.D. (and getting the second paper from it accepted for publication in @AMS_atmos ) this afternoon! #proudadvisor
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@ClarkEvansWx
Clark Evans
2 years
Simply saying that the ECMWF and UKMET forecasts were ignored in the forecast-preparation process does not make it true, and quite frankly is insulting to those who made and make those forecasts.
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@ClarkEvansWx
Clark Evans
3 years
I appreciate Jack sharing this - it’s very well-done. I do think we need to keep working to improve how we teach the math within our courses, not to mention how math is taught from grade school up through college. A few data points…
@JackSillin
Jack Sillin 🇺🇦
3 years
For every troll who changes their ways after seeing the primitive equations meme, there are a dozen+ bright students scared away from meteorology because they don't think they'll ever be able to understand the symbols. So here are some of the primitive equations in English.
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@ClarkEvansWx
Clark Evans
4 years
The paper describing our #MachineLearning -based hurricane intensity prediction model and its performance has now officially been published in @MonWeaRev ! I'm optimistic about what we and/or others will be able to do with more refined/advanced techniques in the future!
@MonWeaRev
Monthly Weather Review
4 years
Just Published: Schaffer, J.D., P.J. Roebber, and C. Evans ( @ClarkEvansWx ), 2020: Development and Evaluation of an Evolutionary Programming-Based Tropical Cyclone Intensity Model. Mon. Wea. Rev., 148, 1951–1970, . @UWMAtmoSci
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@ClarkEvansWx
Clark Evans
4 years
The next year looks nothing like I initially hoped or planned, but with UWM's 2020-21 academic year starting Monday, it was so incredibly freeing to be able to change my e-mail signature from "Program Chair" to "(on sabbatical)" this afternoon. Onward and upward!
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@ClarkEvansWx
Clark Evans
2 months
Simply put: Robin’s professional accomplishments are exceptional.
@tornatrix
Dr. Robin Tanamachi @tornatrix.bsky.social 🌪📡
2 months
Funny. I didn’t miss you, either.
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@ClarkEvansWx
Clark Evans
4 years
I agree with @theweathermanda . Here's an insider's view - as one who has worked with many undergraduates in an atmospheric science program that is embedded within a math department - to explain why, largely from a philosophical perspective... (1/n)
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@ClarkEvansWx
Clark Evans
6 years
Off to Phoenix and #AMS2019 later today. I'm preaching to the choir when I share that it's very disappointing that federal employees won't be able to join us this year, but it's true. Know that despite the social-media trolls, your colleagues across the field support you all.
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@ClarkEvansWx
Clark Evans
4 years
I'll add my +1 to the growing chorus of attendees indicating that they're overstimulated (and in my case, overwhelmed) after several full days of a virtual meeting. For me, it doesn't help that 1) I've been fighting a stomach ailment and 2) impostor syndrome is raging hard.
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@ClarkEvansWx
Clark Evans
3 years
The #MarshallFire 's eastward progress this afternoon has been enhanced by large swaths of dry grassy open space in and west of #Louisville and #Superior . I hope firefighters are able to keep the fire from getting to the Warembourg Open Space (big open area SE/NE of the two boxes)
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@ClarkEvansWx
Clark Evans
10 months
As more REU sites begin to accept applications for their Summer 2024 cohorts, I've updated my list of REUs in the atmospheric and related sciences! Please share others I may have missed, and feel free to share with your networks!
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@ClarkEvansWx
Clark Evans
4 months
I’m happy to have been able to use my professional expertise to help my community as a Trustee. Thanks to @COweatherman and the @Wisconet for the partnership! I didn’t expect it to be the front-and-center story in today’s local newspaper, though!
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@ClarkEvansWx
Clark Evans
6 years
I've been telling people here today that a #Michael -like storm could drive water all the way to Tallahassee's southern fringes. Here's the cat-4 projection from the National Storm Surge Hazard Maps; red is 9'+ of inundation. Incredibly low-lying from Franklin->Dixie Co. & beyond.
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@ClarkEvansWx
Clark Evans
2 years
My friend @mlgriffinWX1 was telling me this week about how she values having collected good people in her life over the years. It became increasingly apparent thru the week how fortunate I am to have done the same. It was a blessing to share so many great experiences this week.
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@ClarkEvansWx
Clark Evans
5 years
Fascinating case of thunderstorm reinvigoration as the MCS’s outflow boundary collides with the lake-breeze front in eastern Wisconsin. cc: @Chasin_Jason #wiwx
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@ClarkEvansWx
Clark Evans
5 years
It’s been a fantastic week at #AMS2020 with family, friends, & colleagues; laying a foundation for research, educational, & society collaborations; and hardcore scienceing. What I cherish the most, though, are our group’s student presentations. They rocked it!
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@ClarkEvansWx
Clark Evans
5 years
Weather-geek post for the night. I love the quasi-regular spacing of the updrafts/thunderstorms embedded within the MCS across east-central Wisconsin this evening. This isn’t entirely uncommon but stands in contrast to the more contiguous or slab-like structures often seen. #WIwx
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@ClarkEvansWx
Clark Evans
4 years
For the hail geeks out there, here’s a picture of a few cores. @JTAllen3 @AdamsSelin @PSU_RadarMeteo
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@ClarkEvansWx
Clark Evans
3 years
Update:
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@ClarkEvansWx
Clark Evans
4 months
However, it is with a heavy heart that I leave @UWMAtmoSci . I couldn't have asked for better colleagues. I've grown so much personally and professionally in my 13 years at UWM, and half of that is directly because of them. (2/x)
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@ClarkEvansWx
Clark Evans
4 years
A student in my group & I have published on Atlantic hurricane season length (Karloski & Evans 2016, #JClimate - ), and the forecast potential for subtropical cyclone development north of the Bahamas this weekend has reignited the debate. A thread: (1/15)
@MichaelRLowry
Michael Lowry
4 years
The Atlantic is a bit of an odd bird compared to the Pacific. Subtropical development is a wildcard that makes for inconsistent starts. That said, 99% of hurricane activity and virtually all Cat 3+ storms occur between June and November. Last May hurricane was Alma in 1970.
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@ClarkEvansWx
Clark Evans
4 months
To be quite honest, I was never looking to leave UWM. Yet, when our Provost indicated that he would not approve replacing the two of our three other faculty members after their retirement in a year, I felt as if I had no other choice. (4/x)
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@ClarkEvansWx
Clark Evans
5 years
A somber afternoon after hearing of the unexpected passing of Fuqing Zhang, a giant in the field. I & a few others overlapped with him during PREDICT. I have many fond memories of that trip, but none fonder than a personal chat with him on the trip back. He will be dearly missed.
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@ClarkEvansWx
Clark Evans
4 years
👀 “The NOAA Office of Oceanic and Atmospheric Research (OAR) invites applications for the establishment of a Cooperative Institute (CI) for Severe and High-Impact Weather Research and Operations.”
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@ClarkEvansWx
Clark Evans
6 months
Is anyone else who attended #AMS2024 dealing with fraudulent hotel bar charges from the @Hilton that the hotel is not addressing? I’ve tried twice now & am getting nowhere. And to whoever spent $252 at the hotel bar and put my room down on the receipt: I don’t like you much rn.
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@ClarkEvansWx
Clark Evans
3 years
Looks like my home weather station in Grafton recorded a ~1 hPa blip from the #Tonga volcano’s shock/pressure wave earlier this morning. #wiwx @NWSMilwaukee
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@ClarkEvansWx
Clark Evans
4 months
The other half is because of our students. I admire them so much. It has been an absolute pleasure working with and learning from them as their advisor, teacher, or colleague. I hope that I have served them well, and I hope they know that I will always be their champion. (3/x)
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@ClarkEvansWx
Clark Evans
4 years
One big plus of this year's virtual #AMS2021 : no #AMSplague ! (Though it sadly comes thanks to a worldwide pandemic.)
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@ClarkEvansWx
Clark Evans
2 years
Why not… #PreAMS2023
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@ClarkEvansWx
Clark Evans
6 years
I’m looking for 2-3 graduate students to join our team in the fall. Interested in severe storm environments, inland tropical cyclone intensity change, and/or TCs and climate? Contact me!
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@ClarkEvansWx
Clark Evans
4 years
New paper in press for @MonWeaRev led by Ph.D. student Kevin Prince - a climatology of indirect tropical cyclone interactions in the North Atlantic and western North Pacific basins! A short thread…
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@ClarkEvansWx
Clark Evans
7 months
Neighbor’s tree collapsed in half with the weight of the snow. Sheesh. Got their roof over the garage unfortunately that’s all of the house it got. #wiwx #graftonwi
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@ClarkEvansWx
Clark Evans
3 years
My wife’s reaction to hearing me start to stream a certain Christmas song from the other room:
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@ClarkEvansWx
Clark Evans
1 year
While it is exceedingly rare to see this occur with an eastern North Pacific tropical cyclone, #Hilary appears to be an exception. This movie depicts Hilary's upper-level divergent outflow (vectors), trough/ridge pattern (black contours), and winds (blue/red shading). (3/6)
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@ClarkEvansWx
Clark Evans
5 years
Of all of the potential weather I would have expected for #AMS2020 in Boston, mostly sunny and 65°F was really low on the list. I’ll take it!
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