Randy Chase

Hi all, if you like what I have posted here in the past, check me out (with the same name) on 🦋 (the other site). I will not be posting here anymore ✌️

link to repo:github.com/dopplerchase/D…

🚨 A long overdue update to DRpy has been pushed up. I suggest installing with mamba, but conda did work for me (~10 mins). Here is the GPM overpass from this morning of #Zelia Updates: 1) Fixed auto-download functionality 2) small fixes to visual aspects of plots

@CamiiNaranjo23 @esa_earthcare h5py: import h5py as h5 hdf = h5.File(filename) list(hdf)

@DopplerChase @esa_earthcare Hi @DopplerChase, I would to like to know which Python module are you using to open the @esa_earthcare data?

More .@esa_earthcare data for your timeline. This time, some top down views in visible and infrared with the radar track along side that sweet sweet W-band radar data. Of course this time, some more deep convection ⛈️ This was from today at 0420-ish UTC

@LuchoVidalOK @esa_earthcare use this site to find orbits to download: web.meteo.mcgill.ca/EarthCARE/

@DopplerChase @esa_earthcare Where and how can I acces to the data? I'm interesting in explore this data in Argentina

@Flexi23 Looks like there has been some folks looking into it: scholar.google.com/scholar?hl=en&…, but it looks like primary concerns are chemistry first (e.g., ozone). I am curious of the greenhouse impact of the H20 vapor in the strato-meso sphere

@DopplerChase closest thing that comes to my mind is this geoengineering proposal: brisam9.blogspot.com/2025/01/simm.h… "Stratospheric Ice Micro-Mirrors (SIMM): A Novel Solar Radiation Management Strategy to Mitigate Global Warming." at the cost of $230m even feasible, apparently

Question for climate model folks, are we accounting for this new water vapor supply to the upper atmosphere in the CMIPS?

@LuchoVidalOK @esa_earthcare only level 1 data are available at the moment, but thats all the plots you have seen: earth.esa.int/eogateway/cata…

I'm thrilled to share that my #AMS2025 talk and poster received awards! My talk on ML research, done with @DopplerChase, earned third place in the student radar oral presentation category, and my student poster on the same research won an outstanding student presentation award.😎

“Harness AI/ML for data driven forecasting” labeled one of five key scientific pillars for the next 10 years. Continued commitment by one of the world’s major weather forecasting entities

𝗝𝗢𝗦𝗛 𝗔𝗟𝗟𝗘𝗡 𝗜𝗦 𝗧𝗛𝗘 𝟮𝟬𝟮𝟰 𝗡𝗙𝗟 𝗠𝗩𝗣!! 🏆 bufbills.co/3CDu1lG | #NFLHonors

How much information does just 2 satellite images have for forecasting? Alone, maybe more than you would guess but beyond 4 hours it gets weird. "A 🦋 flaps its wings..."

It's worth repeating: the @NWS costs each American taxpayer just $4/yr, but creates over $100,000,000,000 in value to the economy. And this ROI has been _increasing_ over time. See the linked report coordinated and supported by the @AMSPolicy program. ametsoc.org/index.cfm/ams/…

@MeteopressEN Was this a field campaign? i.e., could the data be public for research?

Precipitation over the island of Tongatapu from January 27 to 31, 2025, as observed by the Meteopress weather radar.

the desire to hook my pi-sdr setup (or just the ambientweather api directly) to this is strong... big fan of e-ink devices

@wxKobold Yup! Finally writing it all up

@DopplerChase Oh heck that's exciting. This is presumably the paper behind the sim cloud cover loops you've been sharing?

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More .@esa_earthcare radar data here. What does sub- km along track resolution get you? You can start to see fine-scale features like generating cells and 'ocean effect' snow. This level of detail use to only be accomplished from plane radars flying 10x closer and 100x slower 🤯

@MatthewCappucci Hey Matt, while the aerosols from the engines could in theory help here, I personally think the adiabatic cooling behind the plane wing cools the drops to enhance ice nucleation (support for this idea: science.org/doi/full/10.11…)

SNOW produced by AIRPLANES!? It just happened in Denver on Saturday! ❄️ A type of "accidental cloud seeding" by several United Airlines flights! How did it work? The airplanes flew through a layer of supercooled water droplets on their approach to Runways 35L and 35R. Supercooled water droplets are water droplets that remain a liquid even at temperatures below freezing. The air is too clean, and the droplets have nothing to freeze onto – so they remain suspended as a very, very cold liquid... UNTIL an airplane flies through that layer (in this case, about 1,500 to 3,000 feet). That's where the supercooled water droplets were. Planes have dirty exhaust, with little bits of soot and microscopic metallic particulates. Those aerosols act as "condensation nuclei" for moisture to congeal on and, in subfreezing conditions, freeze. Then ice crystals can form. Generally speaking, ice crystals naturally form/grow at temperatures between 0 and 10 degrees Fahrenheit. It was 17.4 degrees at the surface, but, at 3,000 feet, temperatures would have been around 5 degrees Fahrenheit... PERFECT for ice crystal formation! Those ice crystals fell! We know based on observations at the airport. It was the only snow/precipitation in the region! And you can see on radar how it traces the arrival path of aircraft. There was one plane that was an especially-efficient snow producer... it is perhaps an older plane and therefore a little bit dirtier: United Flight 5528 — operated by SkyWest Airlines — which originated from Williston Basin International Airport in northwest North Dakota. (I've pasted the flight plan below). This has happened a couple other times before – in Chicago with planes landing at O’Hare on Nov. 27, 2018, and in Dallas on Feb. 12, 2021.