#SevereWeather #AtmosphericRiver

From CNN.com: This notorious West Coast phenomenon fueled historic floods in the East. Another one is on the way

https://www.cnn.com/2025/04/18/weather/kentucky-floods-atmospheric-river-climate?cid=ios_app

Atmospheric Rivers Raise Temperatures

Atmospheric rivers are narrow streams of moisture-rich air running from tropical regions to mid- or polar latitudes. Though relatively short-lived, they are capable of carrying — and depositing — more water than the largest rivers. But researchers have found that their impact is not measured in water content alone. Instead, a survey of 43 years’ worth of data shows that atmospheric rivers also bring unusually warm temperatures. In some cases, the authors found surface temperatures near an atmospheric river climbed to as high as 15 degrees Celsius above the typical. On average, temperatures were about 5 degrees Celsius higher than expected for the region’s climate.

Several factors raise those temperatures — like the heat released when rising vapor meets cooler air and condenses into liquid — but the biggest effect came from carrying warm tropical temperatures to (usually) cooler regions. (Image credit: L. Dauphin/NASA; research credit: S. Scholz and J. Lora; via Physics Today)

#atmosphericRiver #atmosphericScience #fluidDynamics #meteorology #physics #science #weather

#Chicago high-rises above low clouds — just now.

On the left is #TrumpTower. On the right is #WillisTower, formerly known as #SearsTower.

This is a full-color photo, not a greyscale image.

#AtmosphericRiver

Mesoscale Precipitation Discussion 0059
NWS Weather Prediction Center College Park MD
1005 PM EDT Wed Mar 12 2025

Areas affected...portions of southern California

Concerning...Heavy rainfall

Valid 130205Z - 131405Z

Summary...A frontal band will translate from west to east across
southern California coastal ranges, resulting in 1-2 inch rainfall totals - highest in terrain-favored areas. This rainfall will
affect burn scars across the region, posing a risk of runoff,
flash flooding, and debris flows through at least 13Z/6a PDT.

(More)

https://www.wpc.ncep.noaa.gov/metwatch/metwatch_mpd_multi.php?md=0059

#CAwx #rain #AtmosphericRiver

#AtmosphericRiver #California

Well this is fun: bang, crash, boom, hiss

I expect power will fail at some point this afternoon

Great weather overview on what to expect from the incoming California atmospheric river from @SeattleWXGuy @seattlewxguy.bsky.social

Well worth a watch!

https://www.youtube.com/watch?v=SJ76Dt0_Edw

#CAwx #rain #weather #AtmosphericRiver

Birds waiting for the atmospheric river to roll in. My new earworm is "Birdies On The Storm" by The Doors.

#Napa #Califoria #AtmosphericRiver #birds

Oooh, grainy picture of a swirling thing in the atmosphere off the coast of California!

(not here yet, it's rather warm out and sunny. I have to bicycle to the grocery store before it starts raining.)

#AtmosphericRiver #CAwx #rain