#atmosphericRiver
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mattmakens.bsky.social
The Atmospheric River Wildcard: Why El Niño Isn't the Whole Story for the West.

#atmosphericriver #elnino
The Atmospheric River Wildcard: Why El Niño Isn't the Whole Story for the West
YouTube video by Matt Makens, Weatherman
youtu.be
September 26, 2026 at 1:53 PM
phil-stevens.mastodon.nz.ap.brid.gy
60 mm of rain since midnight and it's still pelting down.

#atmosphericriver
September 6, 2026 at 9:38 PM
leysersturm.eurosky.social
An atmospheric river (AR) is developing over the North Atlantic that will extend into western and central Europe by the end of the week, bringing unusually muggy conditions.

#AtmosphericRiver
#Weather
#Forecast
Total column of water on Friday, IFS forecast. Extreme Forecast Index for water vapor flux on Friday.
August 31, 2026 at 11:40 AM
anonymoussewerrat.bsky.social
Atmospheric River extends from the Indian Ocean over vast areas Inland.
Widespread wind and rain expected over SA, Vic, NSW , ACT over coming days . #atmosphericriver #cloudband

Huge northwest cloudband arrives over Australia ahead of widespread rain www.weatherzone.com.au/news/huge-no...
Huge northwest cloudband arrives over Australia ahead of widespread rain
A northwest cloudband will deliver widespread rain across the southern half of Australia this weekend and early next week.
www.weatherzone.com.au
August 8, 2026 at 1:54 AM
catswx.bsky.social
Submit to AGU #AtmosphericRiver Session:
Atmospheric Rivers: Processes, Impacts, Observations, and Uncertainties

When/Where: 7-11 Dec, San Francisco
Deadline: August 5, 2026

Invited speakers:
Travis O’Brien, Indiana University (ARTMIP)
Anna Wilson, CW3E (AR-Recon)

agu.confex.com/agu/agu26/pr...
Atmospheric Rivers: Processes, Impacts, Observations, and Uncertainties
Atmospheric rivers (ARs) are synoptic-scale weather phenomena characterized by filaments of intense water vapor transport in the lower troposphere and are essential to the global hydrological cycle. A...
agu.confex.com
July 20, 2026 at 9:51 PM
weazl.bsky.social
Preventing a weather disaster by having trees taken down BEFORE they hit the house. #bombcyclone #atmosphericriver#elnino
April 26, 2026 at 9:51 PM
cw3escripps.bsky.social
A long-duration #AtmosphericRiver produced moderate-to-heavy rainfall and flooding in portions of Washington last week.

See our latest Quick Summary for more details: cw3e.ucsd.edu/wp-content/u....
Left: GEFS maximum observed coastal AR Scale analysis for the 7-day period ending 5 PM PDT 21 Mar 2026. Center: GEFS control AR Scale and IVT analyses for the 7-day period ending 5 PM PDT 21 Mar 2026 at 46.5°N, 124°W. Right: NWS Stage IV total estimated precipitation for the 6-day period ending 5 AM PDT 21 Mar 2026.
March 25, 2026 at 4:54 PM
cw3escripps.bsky.social
Unseasonably warm and dry conditions will persist over much of the southwestern US into next week, while another #AtmosphericRiver is forecast to impact the Pacific Northwest.

See our latest Quick Look for more details: cw3e.ucsd.edu/wp-content/u....
Page 1 of Quick Look. Summary of key forecast information. Page 2 of Quick Look. Top: GFS 500-hPa geopotential height (contours) and 500-hPa geopotential height standardize anomaly (shading) forecasts valid at 5 AM PDT Fri 20 Mar (left) and 11 PM PDT Tue 24 Mar (right). Bottom: National Weather Service (NWS) experimental HeatRisk forecasts valid for Fri 20 Mar (left) and Wed 25 Mar (right). Page 3 of Quick Look. Top: PRISM month-to-date (1-19 Mar) daily mean temperature anomalies. Middle: Basin snow water equivalent percent of 1991-2020 median valid on 1 Mar (left) and 19 Mar (right). Bottom: California-Nevada River Forecast Center (CNRFC) forecast peak runoff date for water year 2026 (left), average peak peak runoff date for 1991-2020 (center), and water year 2026 departure from average in days (right). Page 4 of Quick Look. Top: West-WRF GFS integrated vapor transport (IVT; shading) and sea-level pressure (SLP, contours) forecasts valid at 11 PM PDT Sun 22 Mar (left) and 11 PM PDT Mon 23 Mar (right). Bottom: Comparison of IVT and SLP forecasts from West-WRF GFS (left) and West-WRF ECMWF (right) valid at 11 AM PDT Tue 24 Mar.
March 20, 2026 at 9:12 PM
bcwildfirewkly.bsky.social
“While nobody resides in the newly declared evacuation zone, the district says the order is a precautionary measure to save lives, as the landslide is hazard is very high.” cheknews.ca/b-c-expands-... - @cheknews.ca

#AtmosphericRiver #BCFlood #BCStorm #OceanFalls
March 19, 2026 at 8:26 PM
bcwildfirewkly.bsky.social
“An atmospheric river is currently drenching parts of B.C., and the Central Coast Regional District says the local state of emergency now covers the entire area that includes Ocean Falls.” cheknews.ca/b-c-expands-... - @cheknews.ca

#AtmosphericRiver #BCFlood #BCStorm #OceanFalls
B.C. expands evacuation area due to flooding, risk of landslides
A regional district on B.C.'s central coast has expanded a local state of emergency and evacuation orders because of flooding and the risk of landslides.
cheknews.ca
March 19, 2026 at 8:24 PM
lesnielbc.bsky.social
It’s the #AtmosphericRiver of the drizzling shits in Metro Vancouver tonight.
Endless moderate drizzle soaking everything.
There’s a very sub-tropical feel to the weather tonight, too, very mild and humid.
March 19, 2026 at 5:02 AM
bcwildfirewkly.bsky.social
“An atmospheric river is now expected to stick around until Friday as heavy rain continues to soak B.C.’s South Coast.” globalnews.ca/news/1173664... - Global News

#AtmosphericRiver #BCStorm #FraserValley #HoweSound #VancouverIsland #YVR
Atmospheric river brings ‘tremendous’ amount of rain to B.C. South Coast - BC | Globalnews.ca
'We've seen some tremendous amounts of rain up on portions of the Central Coast, up in the river's inlet area,' Brian Proctor, a meteorologist with Environment Canada, said.
globalnews.ca
March 18, 2026 at 10:22 PM
cw3escripps.bsky.social
A long-duration #AtmosphericRiver will continue to impact the Pacific Northwest through early Saturday, with flooding expected in western Washington. Check out our latest Quick Look for additional information or visit: cw3e.ucsd.edu/wp-content/u...
A page with bulleted text describing the forecast atmospheric river over the Pacific Northwest and it's associated impacts in the coming days. A page including figures that describe the progression of the AR using IVT maps and CW3E's AR Scale graphics describing the ensemble AR Scale forecasts associated with this event. A page including CW3E's AR Landfall graphic highlighting the probability of AR conditions along the US West Coast and CW3E's QPF graphics highlighting 24-hour and 72-hour QPF forecast from the NWS WPC, with excessive rainfall outlooks overlaid on top. A page including graphics from the NWS Northwest River Forecast Center highlighting locations forecast to experience flood conditions over the next 10 days. Also included are a median snowpack graphic and a forecast temperature map, highlighting the impacts of warm temperatures on the overall Western US snowpack.
March 18, 2026 at 7:14 PM
lesnielbc.bsky.social
Happily it looks like the #AtmosphericRiver that is aimed at Metro Vancouver isn’t as severe as initially forecast.
That said, be wary of pooling water on the roads.
March 17, 2026 at 3:42 PM
cw3escripps.bsky.social
A long-duration #AtmosphericRiver will bring moderate-to-heavy rainfall to portions of western Washington this week. Riverine flooding is possible due to the combination of snowmelt and rain at higher elevations.

See our latest AR Outlook for more information: cw3e.ucsd.edu/cw3e-ar-upda....
March 16, 2026 at 9:25 PM
alberniweather.socialbc.ca.ap.brid.gy
Orange Level Rainfall warning issued for West Coast Vancouver Island (#tofino, #ucluelet, #bamfield, #nitinat, #portrenfrew)

https://weather.gc.ca/en/location/index.html?coords=49.151,-125.906

#bcstorm #atmosphericriver #weather #vancouverisland
Tofino, BC - 7 Day Forecast - Environment Canada
Current conditions and forecasts including 7 day outlook, daily high/low temperature, warnings, chance of precipitation, pressure, humidity/wind chill (when applicable) historical data, normals, record values and sunrise/sunset times
weather.gc.ca
March 16, 2026 at 7:22 PM
dann1960.bsky.social
youtu.be/2bxZC9qwCi4 #heatwave #pineappleexpress
#atmosphericriver

What makes it extraordinary? Other than it is still Winter?

Heat Wave Hits West Coast
What's making this heat wave so extraordinary
YouTube video by KPIX | CBS NEWS BAY AREA
youtu.be
March 16, 2026 at 7:00 PM
lesnielbc.bsky.social
Yikes. The forecast for the coming #AtmosphericRiver has worsened.
Up to 400 mm (40 cm) of rain for Torino, and close to 200 mm near my neck of the woods.
Beware of flooding and road washouts, especially in hilly areas.

DON’T DRIVE THROUGH FLOODED ROADS.
March 15, 2026 at 5:27 PM
alberniweather.socialbc.ca.ap.brid.gy
Mix of snow and rain begins on the Island. Atmospheric River event incoming. Look for ECCC to post various warnings today into tomorrow and through to Wednesday.
#bcstorm #bcsnow #portalberni #vancouverisland #atmosphericriver
A radar image shows the island in green surrounded by blue water of the straights and green mainland. Overlayed is a semi transpararent light blue and green region that stretches north to south and covered the north central island in blue indicating snow and the ocean in green indicating rain
March 15, 2026 at 5:07 PM
cw3escripps.bsky.social
Ensemble guidance is showing high confidence in a prolonged period of #AtmosphericRiver conditions over the PNW beginning this weekend and continuing through next week, with potential for heavy rain in WA from this event.

See our latest AR outlook for more details: cw3e.ucsd.edu/cw3e-ar-upda...
March 13, 2026 at 9:18 PM
cw3escripps.bsky.social
A long-duration #AtmosphericRiver is forecast to bring heavy rain and snow to portions of the Pacific Northwest this week with additional AR activity possible next week. See our latest Quick Look for more information: cw3e.ucsd.edu/wp-content/u...
Page 1 of Quick Look. Summary of key forecast information. Page 2 of Quick Look. Top Left: West-WRF integrated water vapor transport (IVT; shading), and sea-level pressure (SLP; contours) initialized 5 AM PT 11 Mar - F006. Top right: Same as top left but for F024. Bottom left: Same as top left but for F042. Bottom right: Same as top left but for F060. Page 3 of Quick Look. (Top) GEFS ensemble probability of AR conditions [IVT≥250 kg/(ms)] along the West Coast of North America for the 16-day period valid 5 AM PT Wed 11 Mar through 5 AM PST Fri 27 Mar. (Bottom) CW3E 200-member West-WRF 7-day control and ensemble AR Scale and IVT forecasts for 46.5°N, 124°W (coastal southern Washington). Page 4 of Quick Look. Top: NWS Weather Prediction Center (WPC) excessive rainfall outlooks (EROs) valid for the 24-hour periods ending 5 AM PT Thu 12 Jan, Fri 13 Jan, and Sat 14 Jan. Bottom left: WPC Total quantitative precipitation forecast (QPF) valid for the 7-day period ending 5 AM PT Sat 14 Mar. Bottom right: GEFS ensemble freezing level and WPC 6-hourly QPF forecasts in the Duwamish watershed for the 7-day period ending 11 PM PST Wed 18 Mar.
March 11, 2026 at 9:14 PM
aguadvances.bsky.social
Read the #OpenAccess article for free over at
@wiley-stem.bsky.social!

🔗 doi.org/10.1029/2025...

#atmosphere #atmospherics #AtmosphericRiver
Widespread Increase in Atmospheric River Frequency and Impacts Over the 20th Century
Atmospheric river (AR) activity has increased broadly across the midlatitudes, rather than shifting polewards, since 1940 Increases in AR frequency enhance AR-associated precipitation and snowfal...
doi.org
March 11, 2026 at 7:11 PM
cw3escripps.bsky.social
A low pressure system and an #AtmosphericRiver brought heavy precipitation to western Oregon and Northern California and snow over the Cascades and Bitterroot Ranges.

See our latest Quick Summary for more information: cw3e.ucsd.edu/wp-content/u....
February 27, 2026 at 7:03 PM
scrippsocean.bsky.social
🌎 1️⃣ 6️⃣ teams represented by students from universities across North America are teaming up to collect observations to improve global #AtmosphericRiver forecasts. Learn more about the initiative led by @cw3escripps.bsky.social. ⤵️
North American Universities Support Global Expansion of Atmospheric River Science Program
A program focused on key storm systems, known as atmospheric rivers, that provides students with hands-on research experience, launched its second season in January.
scripps.ucsd.edu
February 25, 2026 at 7:45 PM
noagendamedia.bsky.social
⚠️ DANGEROUS SETUP: An atmospheric river is slamming Northern California & the Sierra Nevada right now. Heavy rain falling on deep snowpack is triggering both flood AND avalanche warnings. A volatile mix. We are monitoring water levels LIVE. #CAwx #AtmosphericRiver pic.x.com/UQ8AvSjHiu - https://...
Image
February 25, 2026 at 1:13 PM