Jen DeHart

and with a cool clock, nonetheless
I want a front range train 😭

Details: This imagery showcases a composite of every category 4 and 5 hurricane in the Atlantic ocean since 2020, using the GeoColor product from the GOES-16 and GOES-19 weather satellites. It spans from 22:30 UTC on 2020-08-26 (Hurricane Laura) to 14:00 UTC on 2025-10-28 (Hurricane Melissa).

Every Category 4 and 5 Atlantic hurricane since 2020, all together, in one group photo.

H/t to @ferragamowx.bsky.social for the inspiration.

what was the upstream pattern like? It felt like steering flow was consistent (and a bit wacky) all the way over to the west pac too

if it's anything like Dairy Queen's frozen hot chocolate, it's much much thicker than milk.

aww man, that's a bummer :(

The aurora (pink on top of green) from a residential neighborhood that was far from dark.

The aurora was visible with the naked eye and a 3-second iPhone exposure even within a Loveland neighborhood tonight!

sunset over radar facility

satellite dishes

Picnic with community

Join our Virtual Prospective Student Information Session on Nov. 17, 2025 at 4 p.m. MT. Register at forms.gle/BJeBrbHe9CcE...

Sometimes I wonder if people think "oh, we're the 3rd most populous country in the world, we must not be that far behind India/China"

not realizing that we're 3rd by a large margin and really not that much bigger than Indonesia....

Red Flag Warning for the foothills today. A don’t-be-stupid day for foothills and NE Plains.

#COwx

now how do we get asian carp (and zebra mussels?) under control...

2026 NSF SOARS® First-Year Protege Job Description Summary: UCAR is excited to announce the application opening of the U.S. National Science Foundation (NSF) Significant Opportunities in Atmospheric Research and Science (SOARS) program...

Undergraduate opportunity! 📣 The NSF SOARS program is open for applications! SOARS is an undergrad-grad bridge program focusing on promoting and supporting research, mentoring, and community.

Learn more about eligibility and the app process:
ucar.wd5.myworkdayjobs.com/en-US/UCAR_C...

fully engaged in our meeting huh 😅
(says the person replying to this post)

Alrighty, ready to see something really cool? (and maybe a little nauseating)

The evolution of Hurricane Melissa's mesovortices at peak strength.

according to my *very accurate* google search earlier, Taiwan is ~3 times the size of Jamaica? and the CMR is taller too, I believe.

...CATEGORY 5 MELISSA MAKES LANDFALL IN JAMAICA... ...ONE OF THE MOST POWERFUL HURRICANE LANDFALLS ON RECORD IN THE ATLANTIC BASIN... Melissa has made landfall in southwestern Jamaica near New Hope with estimated maximum sustained winds of 185 mph (295 km/h) and an estimated minimum central pressure of 892 mb (26.34 inches). THIS IS AN EXTREMELY DANGEROUS AND LIFE-THREATENING SITUATION! DO not leave your shelter as the eye passes over, as winds will quickly, and rapidly increase on the other side of the eye. Residents should remain in place through the passage of these life-threatening conditions. To protect yourself from wind, the best thing you can do is put as many walls as possible between you and the outside. An interior room without windows, ideally one where you can also avoid falling trees, is the safest place you can be in a building. You can cover yourself with a mattress and wear a helmet for added protection. The next position update will be provided with the intermediate advisory at 200 PM EDT (1800 UTC) . SUMMARY OF 100 PM EDT...1700 UTC...INFORMATION LocatIoN..18.1N 78.0W ABOUT 25 MI...40 KM SE OF NEGRIL JAMAICA ABOUT 145 MI...235 KM S OF GUANTANAMO CUBA MAXIMUM SUSTAINED WINDS...185 MPН...295 KM/H PRESENT MOVEMENT... NNE OR 25 DEGREES AT 9 PH...15 KM/H MINIMUM CENTRAL PRESSURE...892 MB...26.34 INCHES

Visible satellite image of Melissa at 1:01pm EDT, October 28.

#Melissa makes landfall in southwestern Jamaica near New Hope as a powerful category 5 hurricane. For the latest updates visit hurricanes.gov

I was worried for my crew mates when I saw them circling in the eye for over 20 mins. Looks like the very rough ride was confirmed. Plane had to leave early. They reported svr turb and a "sawtooth" eye. Looks like they moved 600-700ft up & down during this stretch in ~1 min.

I'm not sure whether anyone's quantified the 3-D size of a mountainous island needed to deflect a TC's track, but if it persists, that could be a contributing factor (among others).

The last hurricane hunter flights into Melissa have departed before its landfall in Jamaica.

As always kudos to them for their work powering through especially powerful storms like this to collect invaluable data.

From a crewmember on yesterday's Teal 74 mission into now-Category 5 Hurricane #Melissa. As clear of an eye as you will see in the Atlantic basin.

The federal government ends funding for an ambitious AI project The Trump administration has pledged to invest in artificial intelligence. Yet a promising program that uses AI to solve weather-related problems lost funding from the National Science Foundation.

NPR’s All Things Considered covered our renewal cut to AI2ES.

www.npr.org/2025/10/21/n...

Lunch is on the house: Being in the heart of downtown DC, we love that so many of our Federal employees stop by during lunch for a Donburi at China Chilcano or a Fútbol Club at Jaleo. And just because the government is shut down doesn't mean you have to miss out on your favorite lunch spot- because this time, its on us! Join us for lunch from 11:30 AM to 3:00 PM at any of our participating restaurants and enjoy a free lunch item when you present your government ID-you heard that right! Dine in with us Monday through Friday and choose your favorite: a sandwich at Jaleo, a donburi at China Chilcano, a wrap or pita at Zaytinya, or a torta at Oyamel. We've always believed in serving our community with open arms and good food-no shutdown can stop that.

Government workers 👇🏾

Two open faculty positions at CSU!
Topic areas: 1) climate dynamics and 2) applications of AI to atmospheric science.

Deadline: 1 December 2025.

probably one of the more intense ones I've seen? maybe because it's so shallow?
(not sure to what degree other atmospheric circulations are contributing)

it's quite a unique case!

imagery from @cira-csu.bsky.social

rammb-slider.cira.colostate.edu?sat=goes-18&...

our research group has been obsessed with the decay and remnants of Octave this week. such a persistent (and adorable?!) low-level circulation 😍

(cc @drkimwood.bsky.social)

Renowned U.S. climate center trims staff ahead of expected budget cuts NSF-funded National Center for Atmospheric Research is already shuttered during shutdown

Anticipating steep cuts to its budget, the National Center for Atmospheric Research, one of the world’s leading climate research centers, has laid off 29 employees and decided not to fill 21 vacant positions. https://scim.ag/46yaM9g

And with the 15z advisories -- #Hurricane #Imdelda & #Humberto are just 479 miles apart.

This might be the closest two simultaneous hurricanes have ever been in the Atlantic basin in the satellite era (since ~1975).

Close enough for their outer sfc circulations to interact as well.

Map of precipitation from CoAgMET on September 23, 2025. It shows over 1" of rain across all of northeast Colorado, with a maximum of 2.33" at Akron.

Yesterday was the wettest day in quite some time for northeastern Colorado. Widespread observations of over 1" of rain, and over 2" in some spots on the Plains.

Several inches of snow in the mountains too!

Map from coagmet.colostate.edu #cowx

Just a reminder that the application deadline for positions in the Hurricane Specialist Unit (HSU) & Technology and Science Branch (TSB) at the National Hurricane Center is *Tomorrow*

So get those applications in!