AI6YR Ben<p>Mesoscale Precipitation Discussion 0059<br>NWS Weather Prediction Center College Park MD<br>1005 PM EDT Wed Mar 12 2025</p><p>Areas affected...portions of southern California</p><p>Concerning...Heavy rainfall</p><p>Valid 130205Z - 131405Z</p><p>Summary...A frontal band will translate from west to east across<br>southern California coastal ranges, resulting in 1-2 inch rainfall totals - highest in terrain-favored areas. This rainfall will<br>affect burn scars across the region, posing a risk of runoff,<br>flash flooding, and debris flows through at least 13Z/6a PDT.</p><p>(More)</p><p><a href="https://www.wpc.ncep.noaa.gov/metwatch/metwatch_mpd_multi.php?md=0059" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">wpc.ncep.noaa.gov/metwatch/met</span><span class="invisible">watch_mpd_multi.php?md=0059</span></a></p><p><a href="https://m.ai6yr.org/tags/CAwx" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CAwx</span></a> <a href="https://m.ai6yr.org/tags/rain" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>rain</span></a> <a href="https://m.ai6yr.org/tags/AtmosphericRiver" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AtmosphericRiver</span></a></p>
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#atmosphericriver
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AI6YR Ben<p>Oooh, grainy picture of a swirling thing in the atmosphere off the coast of California!</p><p>(not here yet, it's rather warm out and sunny. I have to bicycle to the grocery store before it starts raining.)</p><p><a href="https://m.ai6yr.org/tags/AtmosphericRiver" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AtmosphericRiver</span></a> <a href="https://m.ai6yr.org/tags/CAwx" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CAwx</span></a> <a href="https://m.ai6yr.org/tags/rain" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>rain</span></a></p>
AI6YR Ben<p>Computer models say, YES, Atmospheric River inbound on Wednesday to Santa Barbara/Ventura/Los Angeles/San Diego. <a href="https://m.ai6yr.org/tags/CAwx" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CAwx</span></a> <a href="https://m.ai6yr.org/tags/rain" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>rain</span></a> <a href="https://m.ai6yr.org/tags/AtmosphericRiver" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AtmosphericRiver</span></a></p>
Global News BC<p>Atmospheric river set to douse B.C.’s South Coast this weekend<br>Global BC senior meteorologist Kristi Gordon said there remains a significant amount of uncertainty how much rain will actually fall.<br><a href="https://mastodon.hongkongers.net/tags/weather" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>weather</span></a> <a href="https://mastodon.hongkongers.net/tags/forecast" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>forecast</span></a> <a href="https://mastodon.hongkongers.net/tags/BC" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>BC</span></a> <a href="https://mastodon.hongkongers.net/tags/SouthCoast" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SouthCoast</span></a> <a href="https://mastodon.hongkongers.net/tags/AtmosphericRiver" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AtmosphericRiver</span></a> <a href="https://mastodon.hongkongers.net/tags/BCweather" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>BCweather</span></a><br><a href="https://globalnews.ca/news/11070317/march-6-atmospheric-river/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">globalnews.ca/news/11070317/ma</span><span class="invisible">rch-6-atmospheric-river/</span></a></p>
Spin D'Accord<p>Wow. <a href="https://mas.to/tags/PDX" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>PDX</span></a> <a href="https://mas.to/tags/Weather" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Weather</span></a> <a href="https://mas.to/tags/PineappleExpress" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>PineappleExpress</span></a> <a href="https://mas.to/tags/AtmosphericRiver" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AtmosphericRiver</span></a> </p><p><a href="https://www.youtube.com/watch?v=6jOVBrofamA" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">youtube.com/watch?v=6jOVBrofam</span><span class="invisible">A</span></a></p>
Joseph Elfelt<p>Hey, <a href="https://m.ai6yr.org/tags/PNW" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>PNW</span></a> - Keep your eye on the prize.<br>One more <a href="https://m.ai6yr.org/tags/AtmosphericRiver" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AtmosphericRiver</span></a> to go.<br>Just hang on until Wednesday.<br><a href="https://m.ai6yr.org/tags/WAwx" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>WAwx</span></a> <a href="https://m.ai6yr.org/tags/seattle" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>seattle</span></a></p>
Douglas<p><a href="https://mastodon.social/tags/ForkedMeadow" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ForkedMeadow</span></a> <a href="https://mastodon.social/tags/California" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>California</span></a> has received about 6 inches of precipitation today so far. At one point it was raining at the rate of a half an inch an hour which is incredibly heavy for there.</p><p>It has been switching back and forth between heavy snow and heavy rain all day. Currently the creeks are at the tops of their banks and will soon overflow. The temperature is 36f at the moment but it keeps swinging between the freezing point and 37f.</p><p><a href="https://mastodon.social/tags/atmosphericRiver" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>atmosphericRiver</span></a></p>
Joseph Elfelt<p>Info on <a href="https://m.ai6yr.org/tags/DebrisFlow" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>DebrisFlow</span></a> cameras. Snipped from FB. <a href="https://m.ai6yr.org/tags/AtmosphericRiver" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AtmosphericRiver</span></a> <a href="https://m.ai6yr.org/tags/CAwx" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CAwx</span></a> </p><p>"Update: all seven new cameras are now online<br>With a major atmospheric river projected to hit Southern California this week, ALERTCalifornia's field team has been working hard to install seven new cameras around Los Angeles to help emergency managers monitor potential debris flows from the Eaton and Palisades burn scars. The Bailey Canyon 1 & 2, Sierra Madre Canyon 1 & 2, and Sierra Madre Bridge cameras are already online for the the Eaton Fire scar. Cloudcroft 1 & 2 cameras will be online soon for the Palisades Fire scar. Search camera names at cameras.alertcalifornia.org to see their locations."</p>
Joseph Elfelt<p>When this map opens it is centered on the <a href="https://m.ai6yr.org/tags/EatonFire" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>EatonFire</span></a> area and shows the drainage ways with a black dot at the low end of each one. The map also shows the weather radar with yellow areas indicating heavier rain than green areas. </p><p>There is concern that heavy rains may cause <a href="https://m.ai6yr.org/tags/DebrisFlow" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>DebrisFlow</span></a></p><p>You can drag the map over to the area of the <a href="https://m.ai6yr.org/tags/PalisadesFire" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>PalisadesFire</span></a> and see the same thing.<br><a href="https://m.ai6yr.org/tags/AtmosphericRiver" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AtmosphericRiver</span></a> <a href="https://m.ai6yr.org/tags/CAwx" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CAwx</span></a> </p><p>Open GISsurfer map:<br><a href="https://mappingsupport.com/p2/gissurfer.php?center=34.198322,-118.093758&zoom=12&basemap=Open_Topo_Map&overlay=USA_weather_radar,All_stream_river_lake,2025_segment_combined_hazard,2025_basin_outlet&txtfile=https://mappingsupport.com/p2/special_maps/disaster/fires_debris_flow.txt" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">mappingsupport.com/p2/gissurfe</span><span class="invisible">r.php?center=34.198322,-118.093758&zoom=12&basemap=Open_Topo_Map&overlay=USA_weather_radar,All_stream_river_lake,2025_segment_combined_hazard,2025_basin_outlet&txtfile=https://mappingsupport.com/p2/special_maps/disaster/fires_debris_flow.txt</span></a></p>
Joseph Elfelt<p>The colors on this map always show an estimate from NOAA of the rainfall expected over the next 5 days. As is typical, south facing slopes are expected to receive increased rain.</p><p>The map also shows pink shading for recent fire perimeters including for the <a href="https://m.ai6yr.org/tags/EatonFire" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>EatonFire</span></a> and <a href="https://m.ai6yr.org/tags/PalisadesFire" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>PalisadesFire</span></a> where there is at least some <a href="https://m.ai6yr.org/tags/DebrisFlow" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>DebrisFlow</span></a> risk.<br><a href="https://m.ai6yr.org/tags/AtmosphericRiver" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AtmosphericRiver</span></a> <a href="https://m.ai6yr.org/tags/CAwx" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CAwx</span></a> </p><p>Open GISsurfer map:<br><a href="https://mappingsupport.com/p2/gissurfer.php?center=34.137404,-118.358459&zoom=10&basemap=USA_basemap&overlay=Rain_forecast_day_1-5,Lake_river_stream,Perimeter_WFGIS_all_this_year,USA_roads&data=https://mappingsupport.com/p2/special_maps/disaster/USA_weather.txt||overlay^name=Perimeter_WFGIS_all_this_year^url=https://services3.arcgis.com/T4QMspbfLg3qTGWY/arcgis/rest/services/WFIGS_Interagency_Perimeters_YearToDate/FeatureServer^layers=0^cacheLayers=false" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">mappingsupport.com/p2/gissurfe</span><span class="invisible">r.php?center=34.137404,-118.358459&zoom=10&basemap=USA_basemap&overlay=Rain_forecast_day_1-5,Lake_river_stream,Perimeter_WFGIS_all_this_year,USA_roads&data=https://mappingsupport.com/p2/special_maps/disaster/USA_weather.txt||overlay^name=Perimeter_WFGIS_all_this_year^url=https://services3.arcgis.com/T4QMspbfLg3qTGWY/arcgis/rest/services/WFIGS_Interagency_Perimeters_YearToDate/FeatureServer^layers=0^cacheLayers=false</span></a></p>
Daniel Swain<p>A shift back toward much wetter conditions in NorCal now appears likely by this weekend, with a pretty strong warm/wet <a href="https://mastodon.social/tags/AtmosphericRiver" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AtmosphericRiver</span></a> potentially bringing heavy rain somewhere between SF Bay Area and Oregon border (likely heaviest northern/central Sierra). <a href="https://mastodon.social/tags/CAwx" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CAwx</span></a> <a href="https://mastodon.social/tags/CAwater" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CAwater</span></a></p>
Daniel Swain<p>The proximal culprit has been persistent subtropical ridging over and west of SoCal since autumn. This has kept SoCal high and dry (and near record-warm, too), but directed a parade of mostly warm <a href="https://mastodon.social/tags/AtmosphericRiver" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AtmosphericRiver</span></a> storms into PacNW and NorCal. <a href="https://mastodon.social/tags/CAwx" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CAwx</span></a> <a href="https://mastodon.social/tags/CAwater" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CAwater</span></a> <a href="https://mastodon.social/tags/CAfire" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CAfire</span></a></p>
💧🌏 Greg Cocks<p>Changes In Store For Atmospheric Rivers [California and PNW, USA and Canada]<br>--<br><a href="https://yubanet.com/scitech/changes-in-store-for-atmospheric-rivers/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">yubanet.com/scitech/changes-in</span><span class="invisible">-store-for-atmospheric-rivers/</span></a> <-- shared technical article<br>--<br><a href="https://doi.org/10.1038/s43247-024-01774-0" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">doi.org/10.1038/s43247-024-017</span><span class="invisible">74-0</span></a> <-- shared paper<br>--<br><a href="https://techhub.social/tags/GIS" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>GIS</span></a> <a href="https://techhub.social/tags/spatial" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>spatial</span></a> <a href="https://techhub.social/tags/mapping" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>mapping</span></a> <a href="https://techhub.social/tags/spatialanalysis" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>spatialanalysis</span></a> <a href="https://techhub.social/tags/meteorology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>meteorology</span></a> <a href="https://techhub.social/tags/weather" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>weather</span></a> <a href="https://techhub.social/tags/climatechange" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>climatechange</span></a> <a href="https://techhub.social/tags/warming" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>warming</span></a> <a href="https://techhub.social/tags/WestCoast" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>WestCoast</span></a> <a href="https://techhub.social/tags/USA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>USA</span></a> <a href="https://techhub.social/tags/California" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>California</span></a> <a href="https://techhub.social/tags/PNW" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>PNW</span></a> <a href="https://techhub.social/tags/PacificNorthWest" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>PacificNorthWest</span></a> <a href="https://techhub.social/tags/Canada" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Canada</span></a> <a href="https://techhub.social/tags/atmosphericriver" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>atmosphericriver</span></a> <a href="https://techhub.social/tags/extremeweather" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>extremeweather</span></a> <a href="https://techhub.social/tags/risk" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>risk</span></a> <a href="https://techhub.social/tags/hazard" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>hazard</span></a> <a href="https://techhub.social/tags/model" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>model</span></a> <a href="https://techhub.social/tags/modeling" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>modeling</span></a> <a href="https://techhub.social/tags/spatiotemporal" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>spatiotemporal</span></a> <a href="https://techhub.social/tags/precipitation" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>precipitation</span></a> <a href="https://techhub.social/tags/snowpack" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>snowpack</span></a> <a href="https://techhub.social/tags/rainfall" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>rainfall</span></a> <a href="https://techhub.social/tags/ocean" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ocean</span></a> <a href="https://techhub.social/tags/atmosphere" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>atmosphere</span></a> <a href="https://techhub.social/tags/risk" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>risk</span></a> <a href="https://techhub.social/tags/hazard" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>hazard</span></a> <a href="https://techhub.social/tags/flood" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>flood</span></a> <a href="https://techhub.social/tags/flooding" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>flooding</span></a> <a href="https://techhub.social/tags/storm" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>storm</span></a> <a href="https://techhub.social/tags/stormsurge" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>stormsurge</span></a> <a href="https://techhub.social/tags/regional" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>regional</span></a><br><a href="https://techhub.social/tags/NCAR" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NCAR</span></a> @NCAR</p>
💧🌏 Greg Cocks<p>California Storms Recharged Watersheds, Geodesy Data Reveal<br>--<br><a href="https://eos.org/articles/california-storms-recharged-watersheds-geodesy-data-reveal" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">eos.org/articles/california-st</span><span class="invisible">orms-recharged-watersheds-geodesy-data-reveal</span></a> <-- shared technical article<br>--<br><a href="https://doi.org/10.1029/2023GL107721" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">doi.org/10.1029/2023GL107721</span><span class="invisible"></span></a> <-- shared paper<br>--<br><a href="https://techhub.social/tags/GIS" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>GIS</span></a> <a href="https://techhub.social/tags/spatial" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>spatial</span></a> <a href="https://techhub.social/tags/mapping" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>mapping</span></a> <a href="https://techhub.social/tags/remotesensing" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>remotesensing</span></a> <a href="https://techhub.social/tags/GPS" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>GPS</span></a> <a href="https://techhub.social/tags/GNSS" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>GNSS</span></a> <a href="https://techhub.social/tags/water" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>water</span></a> <a href="https://techhub.social/tags/recharge" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>recharge</span></a> <a href="https://techhub.social/tags/hydrology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>hydrology</span></a> <a href="https://techhub.social/tags/geodesy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>geodesy</span></a> <a href="https://techhub.social/tags/meteorology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>meteorology</span></a> <a href="https://techhub.social/tags/data" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>data</span></a> <a href="https://techhub.social/tags/atmosphericriver" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>atmosphericriver</span></a> <a href="https://techhub.social/tags/climatechange" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>climatechange</span></a> <a href="https://techhub.social/tags/extremeweather" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>extremeweather</span></a> <a href="https://techhub.social/tags/storms" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>storms</span></a> <a href="https://techhub.social/tags/rainfall" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>rainfall</span></a> <a href="https://techhub.social/tags/precipitation" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>precipitation</span></a> <a href="https://techhub.social/tags/watersheds" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>watersheds</span></a> <a href="https://techhub.social/tags/drought" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>drought</span></a> <a href="https://techhub.social/tags/groundwater" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>groundwater</span></a> <a href="https://techhub.social/tags/reservoir" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>reservoir</span></a> <a href="https://techhub.social/tags/snowpack" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>snowpack</span></a> <a href="https://techhub.social/tags/waterresources" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>waterresources</span></a> <a href="https://techhub.social/tags/model" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>model</span></a> <a href="https://techhub.social/tags/modeling" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>modeling</span></a> <a href="https://techhub.social/tags/spatialanalysis" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>spatialanalysis</span></a> <a href="https://techhub.social/tags/spatiotemporal" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>spatiotemporal</span></a> <a href="https://techhub.social/tags/ground" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ground</span></a> <a href="https://techhub.social/tags/changes" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>changes</span></a> <a href="https://techhub.social/tags/waterstorage" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>waterstorage</span></a> <a href="https://techhub.social/tags/management" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>management</span></a> <a href="https://techhub.social/tags/hydrogeodesy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>hydrogeodesy</span></a> <a href="https://techhub.social/tags/interdisciplinary" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>interdisciplinary</span></a> <a href="https://techhub.social/tags/gravity" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>gravity</span></a> <a href="https://techhub.social/tags/shape" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>shape</span></a> <a href="https://techhub.social/tags/Earth" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Earth</span></a> <a href="https://techhub.social/tags/risk" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>risk</span></a> <a href="https://techhub.social/tags/hazard" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>hazard</span></a> <a href="https://techhub.social/tags/ecosystems" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ecosystems</span></a> <a href="https://techhub.social/tags/naturaldisasters" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>naturaldisasters</span></a> <a href="https://techhub.social/tags/California" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>California</span></a> <a href="https://techhub.social/tags/USA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>USA</span></a></p>
Zoom Earth<p>An <a href="https://mapstodon.space/tags/AtmosphericRiver" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AtmosphericRiver</span></a> spanning over 2,000 miles from the Gulf of Mexico to Atlantic Canada is bringing heavy rain and strong winds to the U.S. East Coast.</p><p>Here’s the latest view from satellite + rain detected by radar:</p>
MikeDunnAuthor<p>As California's first Atmospheric River of the season dies out, I thought folks might like to read my article: "Worse Than the Big One," about the Great Flood of 1862, caused by nonstop Atmospheric Rivers lasting more than 40 days straight.</p><p>It was the worst natural disaster to hit the west in the last 160 years, inundating much of the land, from Oregon to San Diego. The agriculturally rich Central Valley became a vast inland sea, 300 miles long and 20 miles wide. The state capital in Sacramento was under water for six months, forcing the government to relocate to San Francisco. 33% of California’s state property was destroyed, along with one in every eight private homes. Thousands of people died, possibly up to 1% of California’s entire population. And while floods of this magnitude used to happen every 200 years or so, models generated by Daniel Swain and researchers at UCLA’s Department of Atmospheric and Oceanic Sciences found that they will now happen roughly every 65 years, due to the effects of climate change. Swain also predicts a 20% increase in the intensity of megastorms, meaning the next one could be far more devastating.</p><p>The event also influenced the course of wars. In New Mexico Territory, for example, the flooded Rio Grande impeded the California Column as it attempted to cut off the retreating Confederate Army of New Mexico, allowing them to escape into Texas. And in California’s Owens Valley, it brought the Paiutes, who were on the brink of starvation because the storms had decimated the wild game they relied on, into conflict with ranchers, who were trespassing on their lands to graze their herds. Over 200 Native Americans died in the Owens Valley Indian War (1862-1867), along with roughly 60 members of the California Militia.</p><p>Even without the effects of climate change, the consequences of a megaflood today are much more serious than they were in 1862, when California had only 500,000 residents. Today there are hundreds of communities and large cities just in the vulnerable Central Valley, with a combined population of 6.5 million people. The Sacramento area, alone, is home to more than one million people, while Fresno has over 500,000 people, and Bakersfield has nearly 400,000 residents. The Central Valley includes the flood plains of two major rivers, the Sacramento and the San Joaquin, as well as many smaller rivers that drain down from the Sierra Nevada mountains.</p><p>This is not just a problem for Californians, either. Another flood like the one in 1862 would have a dire effect on the availability and cost of food for everyone in the U.S. The Central Valley comprises less than 1% of all U.S. farmland, yet it produces 25% of the nation’s food supply, including 90% of the broccoli, carrots, garlic, celery, grapes, tangerines, and plums, as well as 40% of the lettuce, cabbage, oranges, peaches and peppers, and over 20% of the milk. That is $46 billion worth of food annually, double the next most agriculturally productive state in the U.S.</p><p>A megaflood would also be an ecological nightmare. There are still lots of cows in California, nearly 4 million, to be precise. A massive flood would severely pollute the soil and groundwater with rotting carcasses, highly pathogenic H5N1 birdflu, and concentrated manure. Then there are all the other toxins in the region, like fertilizers and pesticides. In Kern County, alone, farmers use 30 million pounds of pesticides per year, while California, as a whole, uses over 200 million pounds of pesticides. Kern County is also one of the nation’s most prolific oil-producing regions, generating 70% of California’s oil and more than double what the state of Louisiana produces. It also has two large refineries. A major flood would pull much of these toxins into the soil and ground water and quickly spread them throughout the flooded regions, creating by far the biggest Superfund clean-up site in the nation’s history.</p><p>You can read the full article here: <a href="https://michaeldunnauthor.com/2023/01/04/worse-than-the-big-one-californias-coming-megaflood-2/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">michaeldunnauthor.com/2023/01/</span><span class="invisible">04/worse-than-the-big-one-californias-coming-megaflood-2/</span></a></p><p><a href="https://kolektiva.social/tags/workingclass" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>workingclass</span></a> <a href="https://kolektiva.social/tags/LaborHistory" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>LaborHistory</span></a> <a href="https://kolektiva.social/tags/atmosphericriver" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>atmosphericriver</span></a> <a href="https://kolektiva.social/tags/bombcyclone" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>bombcyclone</span></a> <a href="https://kolektiva.social/tags/weather" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>weather</span></a> <a href="https://kolektiva.social/tags/ClimateChange" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ClimateChange</span></a> <a href="https://kolektiva.social/tags/inflation" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>inflation</span></a> <a href="https://kolektiva.social/tags/food" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>food</span></a> <a href="https://kolektiva.social/tags/flood" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>flood</span></a> <a href="https://kolektiva.social/tags/california" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>california</span></a> <a href="https://kolektiva.social/tags/indigenous" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>indigenous</span></a> <a href="https://kolektiva.social/tags/mexican" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>mexican</span></a> <a href="https://kolektiva.social/tags/disaster" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>disaster</span></a> <a href="https://kolektiva.social/tags/H5N1" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>H5N1</span></a> <a href="https://kolektiva.social/tags/birdflu" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>birdflu</span></a></p>
Daniel Swain<p>As predicted, the <a href="https://mastodon.social/tags/AtmosphericRiver" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AtmosphericRiver</span></a> has re-intensified today as it makes very slow southeastward progress. Heavy rain has redeveloped from Santa Rosa southward into central Bay Area, with narrow lines of torrential downpours triggering Flash Flood Warning for City of San Francisco! <a href="https://mastodon.social/tags/CAwx" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CAwx</span></a></p>
Daniel Swain<p>The parent low pressure system (former "bomb cyclone") has now weakened somewhat and remains nearly stationary SW of Vancouver Island, but the strong and extremely slow-moving <a href="https://mastodon.social/tags/AtmosphericRiver" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AtmosphericRiver</span></a> over NorCal is just getting started--and is nearly stalled out. <a href="https://mastodon.social/tags/CAwx" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CAwx</span></a> <a href="https://mastodon.social/tags/CAwater" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CAwater</span></a> [1/4]</p>
The Conversation U.S.<p>A powerful <a href="https://newsie.social/tags/AtmosphericRiver" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AtmosphericRiver</span></a> is combining with a <a href="https://newsie.social/tags/BombCyclone" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>BombCyclone</span></a> off the Pacific Northwest, bringing heavy rain and snow to the West Coast. </p><p>The unusual storm could last for days, with some areas expecting over a foot of precipitation. Meterologist Chad Hecht explains:<br><a href="https://theconversation.com/when-an-atmospheric-river-meets-a-bomb-cyclone-the-result-is-like-a-fire-hose-flailing-out-of-control-244175" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">theconversation.com/when-an-at</span><span class="invisible">mospheric-river-meets-a-bomb-cyclone-the-result-is-like-a-fire-hose-flailing-out-of-control-244175</span></a></p>
Zoom Earth<p>The <a href="https://mapstodon.space/tags/AtmosphericRiver" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AtmosphericRiver</span></a> currently hosing Northern California and Oregon won’t let up until the weekend. <a href="https://mapstodon.space/tags/CAwx" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CAwx</span></a> <a href="https://mapstodon.space/tags/ORwx" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ORwx</span></a> <a href="https://mapstodon.space/tags/WAwx" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>WAwx</span></a></p>
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