Alert archive / California / Flash Flood Warnings in 2008
Flash Flood Warning 4, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this flash flood warning at Jan 25, 2008, 10:43 PM PST for Marin County, California. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jan 25, 2008, 10:43 PM PST (06:43 UTC)
- Expired
- Jan 26, 2008, 1:45 AM PST
- In force
- 3 hr
- Issued by
- NWS San Francisco Bay Area, CA
- Area
- Storm-based polygon
- Flood severity
- None
County Marin County, CA
The radar
The Sacramento radar (KDAX), 99 km from the middle of the area, began a volume at 06:45 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Oakland, CA (KOAK), launched 00:00Z, 6.7 hours before the alert went out and 42 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 622 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 217 m²/s²
- 0-3 km storm-relative helicity
- 426 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS56 KMTR 260648 FFWMTR CAC041-260945- /O.NEW.KMTR.FF.W.0004.080126T0643Z-080126T0945Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SAN FRANCISCO CA 1043 PM PST FRI JAN 25 2008 THE NATIONAL WEATHER SERVICE IN SAN FRANCISCO BAY AREA HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTHEASTERN MARIN COUNTY IN WESTERN CALIFORNIA... THIS INCLUDES THE CITY OF SAN RAFAEL... * UNTIL 145 AM PST * AT 1036 PM PST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN AREA OF MODERATE TO LOCALLY HEAVY RAIN ACROSS MARIN COUNTY. RADAR ALSO INDICATED THAT MODERATE TO LOCALLY HEAVY RAIN WILL CONTINUE OVER THE NEXT ONE TO TWO HOURS. THE CORTE MADERA CREEK AT ROSS HAS REACHED BANKFUL AND IS CURRENTLY HOLDING STEADY. ANY ADDITIONAL HEAVY RAINFALL MAY CAUSE THE CORTE MADERA CREEK TO FLOOD COMMUNITIES ALONG ITS BANKS. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SAN ANSELMO...FAIRFAX...KENTFIELD AND ROSS. RUNOFF FROM HEAVY RAINFALL WILL CAUSE LOCALIZED FLOODING OF SMALL CREEKS AS WELL AS ROADWAYS...UNDERPASSES AND OTHER LOW LYING SPOTS. DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATER OR WATER OF UNKNOWN DEPTH. TURN AROUND...DONT DROWN. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT CAN BE DIFFICULT TO RECOGNIZE FLOODING. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. TURN AROUND...DONT DROWN. A FLASH FLOOD WARNING MEANS THAT FLOODING HAS BEEN REPORTED OR IS IMMINENT. IF YOU ARE IN THE WARNING AREA TAKE NECESSARY PRECAUTIONS IMMEDIATELY. MOVE TO HIGHER GROUND. TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE. LAT...LON 3802 12264 3807 12249 3782 12246 3788 12265 TIME...MOT...LOC 0643Z 180DEG 0KT 3791 12253 $$ MEHLE/DYKEMA
The office that day
Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 25, 7:46 PM PST | Flash Flood Warning | MTR | Marin | 3 hr |
Nearby
Flash Flood Warnings in California, 2008Every flash flood warning in 2008
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.