#Tag
Los Angeles County evacuation zone map is here:
https://lacounty.maps.arcgis.com/apps/webappviewer/index.html?id=695f0c805ba046b28c84da79bbf252dc
#CAwx #flooding #EatonFire #PalisadesFire #rain #AtmosphericRiver
From the Ventura County Amateur Radio emergency mailing list:
"A strong storm system is forecast to impact the Ventura County area from Tuesday through Friday. The event is expected to peak on Wednesday, when many areas of the county can expect to receive 8-10 hours of moderate to heavy rainfall. Current projections suggest rainfall totals will range from 2 to 4 inches in the coastal and valley areas and between 4 to 8 inches in foothill and mountain areas. The National Weather Service forecast is available HERE.
MOUNTAIN FIRE DEBRIS FLOW THRESHOLDS (YEAR 2)
≥0.50 inches/15 minutes
≥0.80 inches/30 minutes
≥1.0 inches/hour"
(1/x)
From the Ventura County Amateur Radio emergency mailing list:
"A strong storm system is forecast to impact the Ventura County area from Tuesday through Friday. The event is expected to peak on Wednesday, when many areas of the county can expect to receive 8-10 hours of moderate to heavy rainfall. Current projections suggest rainfall totals will range from 2 to 4 inches in the coastal and valley areas and between 4 to 8 inches in foothill and mountain areas. The National Weather Service forecast is available HERE.
MOUNTAIN FIRE DEBRIS FLOW THRESHOLDS (YEAR 2)
≥0.50 inches/15 minutes
≥0.80 inches/30 minutes
≥1.0 inches/hour"
(1/x)
Los Angeles County evacuation zone map is here:
https://lacounty.maps.arcgis.com/apps/webappviewer/index.html?id=695f0c805ba046b28c84da79bbf252dc
#CAwx #flooding #EatonFire #PalisadesFire #rain #AtmosphericRiver
NWS Los Angeles: A long duration Atmospheric River event will impact Southwest California bringing heavy rainfall resulting in very high rainfall totals Tuesday through Saturday. Christmas Eve and Christmas Day will have the heaviest rain, and the areas of most concern are from southeast Santa Barbara County through Central Ventura County extending through Central Los Angeles County. The areas included within the outline in the graphic.
#CAwx #VenturaCounty #SantaBarbara #SantaBarbaraCounty #PalisadesFire #EatonFire
#CAwx #LOX #graphicast
A long duration Atmospheric River event will impact Southwest California bringing heavy rainfall resulting in very high rainfall totals Tuesday through Saturday. Christmas Eve and Christmas Day will have the heaviest rain, and the areas of most concern are from southeast Santa Barbara County through Central Ventura County extending through Central Los Angeles County. The areas included within the outline in the gra
Via #LosAngelesCounty: Unincorporated Community Residents: If you experience storm-related damage, traffic signal outages, or other issues, contact the LA County Public Works 24/7 Dispatch at 1-800-675-HELP (4357).
NWS WPC has issued a top-of-scale "high risk" flood outlook in/near Transverse Ranges of SoCal; most of the SoCal urban corridor is in "moderate"(second highest) tier. This is a strong signal that significant flash flooding/urban flooding/debris flows are possible on Wed. #CAwx
This upcoming storm will bring very heavy, though not unprecedented, rainfall to SoCal coastal plain (2-4+ inches), with 10+ inches in mountains. But bigger issue will be high rainfall *rates*: torrential 1-3 hour downpours are possible, along w/t-storms. #CAwx
There is also a notably high risk of thunderstorm activity with both the Tue-Wed and Wed-Thu storm waves this week. Even more unusual is elevated threat of *severe* thunderstorms, possibly containing very strong wind gusts, torrential rainfall, and even a brief tornado. #CAwx
#HighWindWarning for south central Oregon - light gold. Possible gusts to 70mph.
High wind watch for California - darker gold.
For details from NOAA, including timing, open the map and click any colored area. Scroll down in the popup since the spot you clicked might have more than one type of weather watch/warning and each one has its own link for the details.
#ORwx #CAwx #Severewx #WindStorm
Reminder: I'll be going live @ noon Pacific time today to discuss incoming series of (very?) strong winter storms slated to affect all of CA. Wind risk & flood risk have notched upward vs my blog post yesterday in some spots; I'll discuss in detail. #CAwx https://www.youtube.com/live/m5iMi4MaHf0
Excessive Rainfall Discussion
NWS Weather Prediction Center College Park MD
229 PM EST Mon Dec 22 2025
Day 3
Valid 12Z Wed Dec 24 2025 - 12Z Thu Dec 25 2025
...THERE IS A HIGH RISK FOR EXCESSIVE RAINFALL ACROSS SOUTHERN
CALIFORNIA...
2100 UTC UPDATE:
The primary change to the previous day 3 Excessive Rainfall Outlook was to add a high risk area along the west to east Transverse Range region of Southern California after collaboration with WFO
LOX. Anomalous 850-700 mb moisture flux...5+ standard deviations above the mean...will impact Southern CA late day 2 into day 3 ahead of the amplifying mid to upper level trof off the CA coast. The heavy rainfall totals for Southern CA will likely occur over an 18 hour period, with widespread 4-7 inch totals, with isolated max amounts of 9"+. Expect a well defined south to north precip band
in this anomalous moisture flux axis with hourly rainfall rates of.50-1.5"+ likely. The potential for high hourly rainfall totals
will accentuate runoff over soil that is relatively dry and or over recent burn scar areas. This will pose a significant threat of flash flooding, landslides, rock falls and mud slides. (...)
#CAwx #AtmosphericRiver #SouthernCalifornia #LosAngelesCounty #VenturaCounty #SantaBarbaraCounty
Anthony Edwards (Newsroom Meteorologist at the San Francisco Chronicle): "Ocean Prediction Center forecasts a 985 mb low tracking into Southern Oregon early Christmas Eve. That would bring significant wind to Northern California. High wind watch in effect across the Bay Area for gusts up to 60 mph.|
https://bsky.app/profile/edwardsanthonyb.bsky.social/post/3malybu5qxc2s
CALFIRE CZU: Sandbag Stacking Tutorial
NWS Los Angeles: A long duration Atmospheric River event will impact Southwest California bringing heavy rainfall resulting in very high rainfall totals Tuesday through Saturday. Christmas Eve and Christmas Day will have the heaviest rain, and the areas of most concern are from southeast Santa Barbara County through Central Ventura County extending through Central Los Angeles County. The areas included within the outline in the graphic.
#CAwx #VenturaCounty #SantaBarbara #SantaBarbaraCounty #PalisadesFire #EatonFire
CALFIRE CZU: Sandbag Stacking Tutorial
This is a bonfire demo instance for testing purposes
