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Reposted by Milind Sharma

AMS Committee on Hydrology @amshydrology.bsky.social · 3d

Did you know that @ametsoc.org offers a Substack channel!? Called "Weather with a Twist", it offers short, free, whimsical dispatches about the latest research in meteorology, courtesy of the AMS's education team. #WaterWednesday

🔗https://weathertwist.substack.com/

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Dr. Robin Tanamachi 🌪️ @tornatrix.bsky.social · 20d

Weather radar people: I’m on the steering committee for a Radar Technology Community Workshop to be held at NCAR in early 2026. We’re trying to nail down dates and topics to attract a good cross section. Please fill out this 5-minute survey and share the link! www.eol.ucar.edu/Radar-Techno...

Radar Technology Community Workshop | Earth Observing LaboratoryRadar Technology Community Workshop | Earth Observing Laboratory

www.eol.ucar.edu

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Dr. Robin Tanamachi 🌪️ @tornatrix.bsky.social · 27d

I am so excited to announce that one of the radar meteorology courses that I developed with @comet-meted.bsky.social is now available! "Dual-Polarization Fundamentals" picks up where "Weather Radar Fundamentals" left off! learn.meted.ucar.edu#/online-cour... (Register on learn.meted.ucar.edu first.)

Screenshot of the lesson, showing a radar dish overlaid with text:
"Online Course
Dual-Polarization Fundamentals
1h 30m - 2h
Description
Once an experimental type of weather radar, dual-polarized (“dual-pol”) weather radar is now deployed across the United States and many parts of the world. This lesson will introduce the basic principles of dual-pol weather radar. By the end of this lesson, learners will understand physical meanings of several commonly used polarimetric radar variables, including differential reflectivity, correlation coefficient, differential phase, specific differential phase, and linear depolarization ratio. Examples will be presented demonstrating the distinctive polarimetric signatures of different scatterer types, both meteorological and non-meteorological. Note: This lesson has as a prerequisite the prior lesson, Weather Radar Fundamentals. It is strongly recommended that beginning learners complete that lesson before starting this one."

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Milind Sharma @gewitterblitz.bsky.social · Aug 28

Moisture convergence:

Milind Sharma @gewitterblitz.bsky.social · Aug 28

Here is the perfect alignment of the surface front along the state border. Source: NOAA NWS SPC Mesoanalysis

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Milind Sharma @gewitterblitz.bsky.social · Aug 28

Seems like preferential organization of deep convective cells along the Red River #okwx #txwx

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Eloquent Science (Prof. David Schultz) @eloquentscience.com · Aug 27

Has anyone else noticed an increase in new publications in generalist journals (e.g., Sci Rep, Nature Comms) with declarative titles that state already well-known realities in your specialty discipline?

a man sits at a table with a plate of food and says " i don t love the way you phrased that "

Alt: David from Schitt's Creek saying "I don t love the way you phrased that."

media.tenor.com

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Milind Sharma @gewitterblitz.bsky.social · Aug 13

One upvote from me for the blog post!

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Kelton Halbert @stormscale.io · Aug 13

Finally pushed a full 1.0.0 (not release candidate) to PyPI and conda-forge.

This also means that:
mamba install sharplib
conda install sharplib

Work now (assuming you have conda-forge set as your primary channel).

There is also now a Dask/Xarray/kerchunk example notebook for HRRR data!

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Milind Sharma @gewitterblitz.bsky.social · Aug 9

I love papers that are well written and link to the open datasets they use, so I can follow the methods and reproduce the figures. #reproduciblescience

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Milind Sharma @gewitterblitz.bsky.social · Aug 8

Did you notice any patterns in the sounding profiles or parcel's initial T/p/z for the cases when the assumption failed?

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Matt Lanza @mattlanza.bsky.social · Aug 8

Houston AFD this morning belongs in the AFD hall of fame.

forecast.weather.gov/product.php?...

National Weather Service

forecast.weather.gov

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AMS Severe Local Storms STAC @ams-sls-stac.bsky.social · Aug 1

Congratulations to Richard Thompson on receiving the 2025 AMS SLS STAC award! Rich is the Director of Forecast Operations at the Storm Prediction Center in Norman, OK. He received the award for conducting exceptional applied research to advance severe thunderstorm and tornado forecasting.

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Eos @eos.org · Jul 30

Liftoff! The NASA-ISRO Synthetic Aperture Radar mission has launched from Satish Dhawan Space Centre. #NISAR will scan the entire globe twice every 12 days to measure changes in Earth’s ecosystems, cryosphere, and land surface.

“It’s orbiting magic.” —Alex Gardner, NASAJPL

eos.org/articles/tra...

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@ztresearch.bsky.social @ztresearch.bsky.social · Jul 21

Outstanding captures of bolt-from-the-blue lightning flashes by Dan Robinson @stormhighway.bsky.social showing the negative end of the bipolar leader typically exits the upper positive charge region and travels to ground outside the storm causing a -CG return stroke. www.youtube.com/watch?v=8r1c...

Clear-air lightning bolts-from-the-blue - timelapse and slow motion!

YouTube video by Dan Robinson

www.youtube.com

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Philippe Papin @pppapin.bsky.social · Jul 5

It's been a bit since I've done a meteorological deep dive, but the devastating flash #flood in central Texas this July 4th/5th deserve a closer look. #TXwx

Yes remnants of #Barry were involved helping enhance moisture. A remnant MCV from Mexico on 3 July also played a role.

Full evolution below ⤵️

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Clark Evans @clarkevanswx.bsky.social · Jul 5

An aspect of the catastrophic flash flooding events that I haven’t yet seen discussed: over land, mesoscale convective vortices have a diurnal cycle that favors rain near their center at night. And, as @rschumacher.cloud and others have shown, mesoscale rotation can increase rainfall totals. (1/2)

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ICECHIP @nsficechip.bsky.social · Jul 3

After 42 days and 15,000 + miles driven, #ICECHIP completed 24 IOPs across 11 states, including within 75 miles from both the Mexico and Canada borders. This totaled more than 10,000 hailstones collected by our teams while data was gathered on different types of hailstorms!

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Insurance Institute for Business & Home Safety @ibhs.org · Jun 26

During the 8-week @nsficechip.bsky.social project, #researchers used the latest technology to collect important #hail data. Hear from lead PI Rebecca Adams-Selin from Atmospheric and Environmental Research as she describes one of the more all-encompassing instruments – the SUMO.

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American Meteorological Society @ametsoc.org · Jun 26

Join the Committee on Weather Analysis and Forecasting for a free webinar that highlights the important work that NOAA meteorologists throughout the agency do to keep the public safe during severe weather events.

Register here: bit.ly/43RIUvq

Graphic for the "Weathering the Storm: How NOAA Forecasters Collaborate and Communicate During Severe Weather Events" webinar on 17 July 2025 at 2:00 PM ET.

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Jason Keeler @chasinjason.bsky.social · Jun 20

Today was a ferry day from Kearney northward, but my van couldn't resist pausing to check out this nice updraft near Onaka, SD.

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Jeff Frame @vortexjeff.bsky.social · Jun 20

The backside of the North Dakota supercell

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Russ Schumacher @rschumacher.cloud · Jun 17

was not expecting to wake up and see reports of an early-morning swath of large hail along the Front Range (apologies to those who woke up to damage.) Big hail in the early am is *exceedingly* rare. Prior to today, only 7 reports in state records of 2"+ hail between the hours of 2-5am. #cowx

Photo of a CoCoRaHS hail observation with a 2.5" hailstone from Wellington, Colorado at 2:30am on June 17, 2025. From https://www.cocorahs.org/ViewData/ViewHailReport.aspx?HailReportID=5595acd1-dca2-42df-a22d-65f6218d4087

Hourly distribution of large hail reports in Colorado, showing a big spike in the afternoon and evening, and almost none in the early morning hours.

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Milind Sharma @gewitterblitz.bsky.social · Jun 17

A tribute to Dr. V.N. Bringi, a towering figure in radar meteorology, as featured in the May 2025 issue of BAMS. Dr. Bringi's pioneering contributions to polarimetric radar have transformed how we observe and understand precipitation processes. His legacy continues to inspire many around the world.

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@ztresearch.bsky.social @ztresearch.bsky.social · Jun 15

Close one for Daniel Shaw. You hear a "snap" coincident with the return stroke b4 thunder arrives from pole behind him. The "snap" is likely acoustic waves from attempted connecting leaders from objects closer to him (antennas or nearby power line structures). www.youtube.com/watch?v=Ilz-...

Extremely Close Lightning - Wyoming 14 June, 2025

YouTube video by Storm Chaser Daniel Shaw

www.youtube.com

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