#atmosphericriver — Public Fediverse posts

[Science News] Between 2021 and 2023, a rise in #ocean temperatures in the tropical zone (between the western Pacific and the eastern Indian Ocean) led to increased #snowfall in #Antarctica and, consequently, an increase in the mass of the #ice sheet. Although temporary, this reversal of the trend appears to be recurring ... https://www.sciencedaily.com/releases/2026/09/260906170128.htm

#science #ClimateChange #AtmosphericRiver #Rossby
@nature

[Science News] Between 2021 and 2023, a rise in #ocean temperatures in the tropical zone (between the western Pacific and the eastern Indian Ocean) led to increased #snowfall in #Antarctica and, consequently, an increase in the mass of the #ice sheet. Although temporary, this reversal of the trend appears to be recurring ... https://www.sciencedaily.com/releases/2026/09/260906170128.htm

#science #ClimateChange #AtmosphericRiver #Rossby
@nature

[Open] Data Related To Flood Mapping [Canada]
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https://natural-resources.canada.ca/science-data/science-research/natural-hazards/flood-mapping/data-related-flood-mapping <-- shared link to technical details
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https://app.geo.ca/en-ca/map-browser/record/a13a2575-5bda-4bfd-a9b1-5bd2dd583f09 <-- shared map/data-portal link, Canada Flood Map Inventory (CFM)
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https://open.canada.ca/data/en/dataset/1074f781-85d3-4c86-86cb-fd1c339197dc <-- shared data-portal link, Canada Flood Susceptibility Index
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https://doi.org/10.3390/ECWS-7-14235 <-- shared (2023) paper
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https://doi.org/10.1002/2017WR020917 <-- shared (2017) paper
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H/T @Michael DePue | VP & AtkinsRéalis Fellow for Water Resources Engineering | PE, PMP, CFM
“At the Canadian Water Resources Association National Conference in Winnipeg, colleagues shared insights from Canada's Flood Hazard Identification and Mapping Program. This initiative has seen over 400 flood mapping projects and more than 1,000 flood hazard maps produced, supported by a substantial investment of $164.2 million from 2024 to 2028.
Two key datasets:
• The Canada Flood Map Inventory, which records the locations of flood hazard maps and provides information on how to access them.
• The national Flood Susceptibility Index, a machine-learning assessment of flood-prone areas, including regions that have not been mapped in detail.
When these two layers are combined on a single screen, it becomes clear where future mapping efforts should be directed — specifically, areas with high susceptibility that currently lack detailed maps…”
#water #hydrography #flood #flooding #risk #hazard #model #modeling #fedscience #publicsafety #humaninpacts #opendata #Canada #GIS #spatial #mapping #damage #infrastructure #floodmapping #prediction #spatialanalysis #spatiotemporal #historic #current #future #preduction #extremeweather #metrology #rainfall #precipitation #atmosphericriver #FloodMapInventory #CFM #floodhazard #FloodSusceptibilityIndex #floodprone #research #susceptibility
@NRCAN

Northern Hemisphere Wintertime Teleconnections from the 2023–24 El Niño Offset by Background SST Trends
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https://doi.org/10.1175/JCLI-D-25-0227.1 <-- shared paper
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https://doi.org/10.1029/2024GL108946 <-- shared paper
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#USA #Canada #NorthAmerica #Mexico #NorthernEurope #PacificOcean #ElNiño #ElNino #pluvial #precipitation #rainfall #snow #weather #climate #humanimpacts #model #modeling #spatial #spatialanalysis #spatiotemporal #atmosphere #extremeweather #CONUS #California #atmosphericriver #AtlanticOcean #IndianOcean #tropical #ENSO #winter #ocean #trend #teleconnections #seasurfacetemperature #SST #atmospheric #climatechange #natural #anthropogenic #noaa #NSF
#NationalCenterforAtmosphericResearch

Deadly #Floods Due to #Levee Failures Reflect Need for #Infrastructure Investment

Levees were never designed to handle extreme weather that is now more common due to climate change.

By Farshid Vahedifard, December 29, 2025

"In recent weeks, powerful #AtmosphericRiver storms have swept across #Washington, #Oregon and #California, unloading enormous amounts of rain. As rivers surged, they overtopped or breached multiple levees – those long, often unnoticed barriers holding #floodwaters back from homes and towns.

"Most of the time, levees don’t demand attention. They quietly do their job, year after year. But when storms intensify, levees suddenly matter in a very personal way. They can determine whether a neighborhood stays dry or ends up underwater.

"The damage in the West reflects a nationwide problem that has been building for decades. Across the U.S., levees are getting older while weather is getting more extreme. Many of these structures were never designed for the enormous responsibility they now carry.

"As a civil engineer at Tufts University, I study water infrastructure, including the vulnerability of levees and strategies for making them more resilient. My research also shows that when levees fail, the consequences don’t fall evenly on the population."

Read more:
https://truthout.org/articles/deadly-floods-due-to-levee-failures-reflect-need-for-infrastructure-investment/

#ClimateChange #AtmosphericRivers #ExtremeRain #Flooding #ExtremeFloods #WhenTheLeveeBreaks

2nd #AtmosphericRiver to flood #California with firehose of rain into Christmas

#HeavyRain and #flooding problems experienced in the #Northwest in recent weeks from atmospheric rivers will shift farther south into California through Christmas Day with major travel disruptions and safety concerns.

By Alex Sosnowski, AccuWeather senior meteorologist

Published Dec 21, 2025

"Two main atmospheric rivers will force copious amounts of #Pacific moisture into #California this week. Heavy rain with incidents of flooding, washouts and mudslides will expand and shift from north to south over the state, leading to travel disruptions at the very least and posing some risk to lives and property in extreme cases. The #SierraNevada will receive many feet of snow as freezing levels lower through the week and the region is affected by both atmospheric rivers.

"The storms are hitting at a busy time of the year, with many traveling short and long distances, running errands and planning outdoor activities.

"The first atmospheric river was already in progress and will continue to focus on Northern to Central California into Wednesday. A second atmospheric river is forecast to develop and concentrate on Central and Southern California from Tuesday night through Christmas Day. But even beyond Christmas, lingering moisture will lead to additional rounds of showers and mountain snow, according to AccuWeather.

"Through Wednesday, much of the #Sacramento Valley and the #SanFrancisco Bay region will receive 2-4 inches of rain with locally higher amounts. The anticipated rainfall for San Francisco in the stormy pattern into next weekend will bring from one to two times the historical average for December.

"On the west- and southwest-facing mountainsides of the Coast Ranges and the Sierra Nevada, 4-12 inches of rain will pour down with an AccuWeather Local StormMax™ of 20 inches.

"At times, multiple inches of rain can fall in a matter of hours, overwhelming storm drains and causing small streams and short rivers to quickly overflow their banks. As the ground becomes saturated, the risk of debris flows, road washouts and hillside collapses will increase substantially.

"From Tuesday night to early Friday, the second atmospheric river will spray rain of varying intensity throughout Central and Southern California.

"A general 4-6 inches of rain is forecast to fall on the Los Angeles basin. Downtown, L.A. had seven times its historical average monthly rainfall for November with 5.53 inches. While no rain has fallen so far in L.A. this month, from two to three times December's average rainfall of 2.48 inches may occur with the stormy pattern from Tuesday to Saturday.

"On the southwest-facing hillsides of the Transverse Ranges, 6-12 inches will pour down with an AccuWeather Local StormMax™ of 16 inches. Even in many desert areas of Southeastern California, between 0.25 of an inch to 1 inch of rain is expected to fall.

"Just as with the first atmospheric river up north, rain will be drenching, leading to rapid urban flooding and flooding of small streams and short-run rivers, along with mudslides, washouts and the potential for hillside slides in Southern California. "

Source:
https://www.accuweather.com/en/severe-weather/2nd-atmospheric-river-to-flood-california-with-firehose-of-rain-into-christmas/1846140

#ClimateChange #AtmosphericRivers #ExtremeWeather #ExtremeRain #Landslides #Flooding #ExtremeWx

Rapid Mass Movements Triggered By An Atmospheric River In Disko Island, West Greenland
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https://doi.org/10.1002/esp.70201 <-- shared paper, 2023 event(s)
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https://doi.org/10.1007/s10346-022-01922-7 <-- shared paper, 2021 event(s)
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https://www.polarresearch.at/the-great-landslide-of-assapaat/ <-- shared technical article
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#landslide #massmovement #thawing #permafrost #extremewweather #cryosphere #Qeqertarsuaq #ArcticDEM #DiskoIsland #Greenland #ERA5 #CARRA #fluvial #pluvial #precipitation #rainfall #snow #ice #glacier #glacial #temperature #slushflow #GIS #spatial #mapping #geomorphology #elevation #slope #atmosphericriver #climate #weather #snowmelt #island #coast #coastal #damage #humanimpacts #infrastructure #arctic #monitoring #geohazard #risk #hazard #engineeringgeology #polar #change #remotesensing #spatialanalysis #spatiotemporal #earthobservation #debrisflow #remoteareas
#GreenlandEcosystemMonitoring | @europeanspaceagency | #CopernicusECMWF #Copernicus

When Heavy Rain Meets #Glacial Landscapes – Record-Breaking #Flooding in #WashingtonState [USA]…
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https://www.linkedin.com/posts/geological-society-of-america_geohazards-flooding-landslides-ugcPost-7405031818007187457-wuwy <-- shared GSA LinkedIn post
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https://doi.org/10.1130/G39691.1 <-- shared paper
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https://komonews.com/news/local/landslide-risk-western-washington-severe-flooding-heavy-rain-continues-for-dirt-soil-sediment-weather-forecast-winter-storm-pacific-northwest <-- shared media article
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https://youtu.be/1yB34LibGo8?si=Z_Ug5gd3xLhvZGym <-- shared media video
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#geohazards #Landslides #Geology #landslide #severeweather #landslides #landsliderisk #weather #westernwashington #washingtonflooding #flooding #winterconditions #storm #pnw #meteorology #science #massmovement #flood #extremeweather #fluvial #pluvial #rainfall #atmosphericriver #engineeringgeology #risk #hazard #mitigation #forecasting #riskmanagement #damage #infrastructure #cost #economics #publicsafety #PNW #PacificNorthwest #water #hydrology #glacial #sediment #sedimentology #stratigraphy #GIS #spatial #mapping #remotesensing #spatialanalysis #elevation #slopestability #froundwater #hydrology #model #flow #modeling #outwash #till #clay #watertable #lithology #landscape #geomorphology #geometry #USA

The Rise Of Community-Led Landslide Monitoring
Could an innovative natural-disaster monitoring system in Alaska be a model for the rest of the country?
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https://seaklandslideworkinggroup.substack.com/p/article-in-sierra-about-southeast <-- shared technical #Substack
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#communitybased #landslidemonitoring #NationalLandslidePreparednessAct #massmovement #engineeringgeology #risk #hazard #landslide #publicsafety #monitoring #Sitka #Alaska #debrisflow #risk #hazard #water #hydrology #pluvial #fluvial #rainfall #precipitation #AK #extremeweather #climatechange #atmosphericriver #coast #coastal #slope #steepness #Haines #Ketchikan #Wrangell #Juneau #propertydamage #cost #economics #soilmositure #sensors #raingauge #Skagway #emergencymanagement #forecasting #tool #online #dashboard #situationalawareness #NSF #grant #infrastructure #threshold #historic #analysis #geomorphology #geomorphometry #communication #buddysystem #risktolerance #SitkaTribeofAlaska
#NationalScienceFoundation #USFS

California Prepares for Extreme Weather Swings as New Water Year Begins [October 1st 2025]
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https://water.ca.gov/News/News-Releases/2025/Sep-25/California-Prepares-for-Extreme-Weather-Swings-as-New-Water-Year-Begins <-- shared technical article
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#water #hydrology #waterresources #CaliforniaDepartmentOfWaterResources #change #extremeweather #watersecurity #watermanagement #California #SoCal #SouthernCalifornia #climate #drought #flood #flooding #atmosphericriver #precipitation #rainfall #planning #mitigation #policy #watershortage #wateryear #fall #winter #uncertainity #climateprediction #NOAA #LaNina #storms #risk #hazard #watershed #protection #wildfire #waterquality #atmosphere #risk #hazard #wet #dry
@CaliforniaDepartmentOfWaterResources

Global News BC: High streamflow advisories, flood watches issued for much of southern B.C. https://globalnews.ca/news/10148075/high-streamflow-advisories-bc-rainfall/ #globalnews #britishcolumbia #news #HighStreamFlowAdvisory #BCRiverForecastCentre #AtmosphericRiver #BCweather #Weather

Here's a look at the storm at 1600ft on #AtlasPeak in #Napa California today. Two fires, now this... lots of down trees and limbs today.

Can you see the water spouting from a gopher hole at the beginning? Every gopher hole is a gusher right now... wonder how the gophers handle this?! 🤔

#sfba #sfbawx #CAwx #CAwater #AtmosphericRiver #FieldNotes

#AtmosphericRiver #California #SantaBarbara #Montecito #Goleta

An EVACUATION ORDER is now in effect for the identified properties and areas in South #SantaBarbaraCounty associated with the #AlisalFire, #CaveFire & #ThomasFire

The Wake Center on 300 N. Turnpike Road in Santa Barbara is open as an evacuation shelter for persons displaced by evacuation orders.
For north county support, call the American Red Cross at (805) 678-3073

Evacuation map > https://sbcoem.maps.arcgis.com/apps/webappviewer/index.html?id=887c7b2302484e41b8f20f37660cb2cb

Biggest storm since 2011 has San Diego County in ‘crosshairs’: “The San Diego River watershed will receive about 300,000 acre feet of water, enough to serve about 500,000 homes for a year if there was a way to capture it all, said Marty Ralph, director of UC San Diego’s Center for Western Weather and Water Extremes.”

https://www.sandiegouniontribune.com/black-ice-on-I-8 via @sdut

#sandiego #AtmosphericRiver #drainagebasin #watermanagement #UCSD #watershed

Atmospheric Rivers FTW, now just need water management to survive and thrive

https://fox5sandiego.com/weather/ap-warming-to-make-california-downpours-even-wetter-study-says/

#AtmosphericRiver #California #watermanagement #aquifers #beavers #upzoning #urbanplanning #drainagebasin

#SantaBarbara #Montecito #SantaBarbaraCounty #AtmosphericRiver #California

An EVACUATION ORDER has been issued for the #ThomasFire burn scar effective Jan. 9, 2023 at 11 a.m

Shelter in place has been issued for the #AlisalFire burn scar due to the flooding

Power is now out in #Richmond. It’s not really raining, it’s relatively calm outside, and there are only occasional wind gusts. It was way worse last week. No update from PG&E yet other than that between 500 and 4999 people are affected.

#RichmondCA #BayArea #BayAreaWX #Storm #AtmosphericRiver #WX #SFBA

#BombCyclone #AtmosphericRiver #WinterStorm
#SantaBarbaraCounty #California

Mandatory evacuations ordered near the #ThomasFire, #AlisalFire & #CaveFire burn scars

Evacuation shelter
Wake Center, 300 North Turnpike Road, Santa Barbara, CA 93111

Small animals
Santa Barbara County Animal Shelter, 5473 Overpass Rd, Santa Barbara, CA 93111

Horses, Lifestock
Earl Warren Showgrounds, 3400 Calle Real, Santa Barbara, CA 93105

Animal evac hotline
(805) 681-4332

Listen to Michele K-Tel's AllSorts on @bffdotfm. Get ready for the next round of raindrops with ALLSORTS of STORMY songs 🎶 (no umbrellas or galoshes required...just yet). ☔️🌬️📻💥 #atmosphericriver #communityradio #rainsongs #BFFdotFM #MicheleKTel #AllSorts https://bff.fm/broadcasts/34590

After a clear day, the leading edge of the next #Storm brought this showstopper of a #sunset. The SF Bay region is 10 years into a #drought, and we need every drop. Even the moisture in fog makes a difference!

Looking over #NapaValley from #AtlasPeak north of San Francisco in #California

#Napa #AtlasCA #CAwx #CAwater #megadrought #AtmosphericRiver