Arthur Witt

🧵In support of NOAA+OAR+NSSL's R2O efforts, for those here involved in severe-storm warning operations, I'll share some results from my current study on radar-based prediction of hail size, which focuses on improved detection of giant hail. Background info (from an article submitted to WAF) (1/11)

Those at the NWC (Norman, OK) interested in early voting (Wed-Fri, 8am-6pm) can do so at the nearby Noble Public Library (3 miles south of the NWC; but you must be registered to vote in Cleveland County). If you decide to drive down to the Library, @swingleft.bsky.social (east) at the McClain Bank.

Here we go again (round #2). Long TBSS with max storm reflectivity of 79 dBZ.

Lots of hailstorm activity across Arizona and surrounding areas over the past 24 hours (Oct 21 through early Oct 22).

Hailstorm with reflectivity of 78 dBZ and a major TBSS, west of Payson, AZ.

Flagstaff, AZ under serious threat.

Supercell NW of Sedona, AZ with an increasing tornado risk.

Intense supercell with impressive TBSS south of Prescott, AZ.

It’s not just about affordability. Maybe for the first time since 1974, voters say their main concern heading into the midterms is corruption in government. Great to see.

Although it may be convenient to use "diameter" here, given that the pictured hailstone has an aspect ratio of ~2, "maximum dimension" would be more accurate. www.ncei.noaa.gov/monitoring-c...

Ukrainian President Zelenskyy has announced that he would support the energy ceasefire. He always supported ceasefires. He offered them numerous times. Putin and Russia never did. But this puts the ball back in Putin‘s (and Trump‘s) court.

podcasts.apple.com/us/podcast/t...

Thank you @wxjaime.bsky.social for your award-winning research helping to advance hail science.

4 pics from today’s western Maine and NH fall foliage road trip in the White Mountains.

Ugh. Mentions Trump's desire to eliminate NOAA Research (OAR). Includes remarks from @weatherwest.bsky.social www.npr.org/2026/10/01/n...

Join us today for an AOS-CPEP joint colloquium at 3:30 CT! Adam Sobel, professor at Columbia University’s Lamont-Doherty Earth Observatory, will discuss "Usable Climate Risk Science: Motivation, Examples, and a Proposal." Livestream: go.wisc.edu/uwaos-youtube

Gratitude, humility, responsibility: Those are the virtues our overlapping histories should instill. But the new right turns that upside-down. It replaces gratitude with a sense of entitlement, humility with arrogance, and a sense of duty with the will to power and the right to dominate.

"Please, don't say a 100%! " "Call it 70% and let's just move on." H/t @ghostpanther.bsky.social

www.youtube.com/watch?v=EPGT...

Learn more about Phased Array Radar (PAR) and how PAR data may affect the severe-weather warning decision process of National Weather Service forecasters: journals.ametsoc.org/view/journal...

We need to rev it up. Cancer vaccines. nature.com/articles/d41... @nature.com

Time lapse of nocturnal convection in Goodland, KS during the late evening on Wednesday August 19, 2026. View looking toward the SSW. In this case, a long-lived, eastward moving anticyclonic supercell (and descending precipitation core) passes just south of the NWS office. #kswx #cowx #newx

My thoughts on how we are witnessing the eatablishment of an institutionalized system of corruption in the United States. I write more about this administration and how it compares to other autocracies at my Substack, Lucid.Substack.com

Charlie and Ed call out the absolute stupidity of climate change denialism. Even reference the movie Don't Look Up.

Widespread radar velocities of 40-50 m/s on the lowest elevation scan.

For anyone interested in radar-based hail detection, and who did not attend the 32nd SLS conference last week, here is a copy of our poster. #32SLS #AMSMadisonSummit

Less protein, more lifespan! A comprehensive review of the merits of protein restriction for healthy aging A flip from the proteinmaxxing craze cell.com/cell-press-b...

Drone video of the tornado damage in Menasha, WI. www.youtube.com/watch?v=FIeX...

I’ve always loved Jennifer. #JenniferLawrence #Gaza

More Menasha footage. Source: www.reddit.com/r/wisconsin/...

Menasha was hit really hard. Source: www.reddit.com/r/wisconsin/...

Tornado impact footage from Appleton. I retract all my whining about the 80+ dew point. Source: www.reddit.com/r/wisconsin/...

Yikes! The tornado path went across the center of Appleton, WI.

Very distinct TDS in both ZDR and CC.

The 12Z GRB sounding aptly indicated the risk of very large hail (high CAPE and very elongated hodograph) with this morning's intense hailstorms across northern WI (multiple reports of hail up to 3 inches in diameter).

🎧NEW: In the latest episode of “The Best People,” @nicollewallace.bsky.social is joined by historian @hcrichardson.bsky.social to discuss the financial realities facing everyday Americans, threats to democracy, Trump 2.0 and more. Listen now ⬇️ podcasts.apple.com/us/podcast/t...

United Airlines has basically melted down today. Computer crash delayed morning flights, United ops decided to prioritize moving airplanes instead of passengers. And now bad weather has flights diverting all over the place. Passengers have no idea what's going to happen to them.

@united.com has a system-wide outage underway. No check-in, no baggage, no planes taking off.

This is tonight’s A block

... and the overlay

God is angry. bsky.app/profile/acyn...

"Let me just say what should be obvious: Thank God for air conditioning, one of the greatest achievements of modern civilization." But America's approach to A/C is imperfect, too. The latest edition of Receipts from @crampell.bsky.social: lnk.thebulwark.com/4y98qtl

A New York poll worker says two federal agents confronted her at her polling place over a social media post criticizing ICE. The incident didn't disrupt voting, but it raises a bigger question: why is ICE keeping tabs on the people helping run our elections?