Alert archive / California / Flash Flood Warnings in 2008
Flash Flood Warning 2, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Jan 5, 2008, 1:25 AM PST for Orange 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 5, 2008, 1:25 AM PST (09:25 UTC)
- Expired
- Jan 5, 2008, 4:30 AM PST
- In force
- 3 hr
- Issued by
- NWS San Diego, CA
- Area
- Storm-based polygon
- Flood severity
- None
County Orange County, CA
The radar
The Santa Ana Mts radar (KSOX), 11 km from the middle of the area, began a volume at 09:27 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
San Diego, CA (KNKX), launched 00:00Z, 9.4 hours before the alert went out and 111 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
- 1074 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 142 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 KSGX 050934 FFWSGX CAC059-051230- /O.NEW.KSGX.FF.W.0002.080105T0925Z-080105T1230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SAN DIEGO CA 125 AM PST SAT JAN 5 2008 THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL ORANGE COUNTY IN SOUTHWEST CALIFORNIA... * UNTIL 430 AM PST * AT 125 AM PST...NATIONAL WEATHER SERVICE DOPPLER RADAR AND RAINFALL REPORTS INDICATED FLASH FLOODING FROM HEAVY RAIN OVER THE WARNED AREA. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SILVERADO CANYON. THE TOWNS OF SILVERADO AND MODJESKA...IN ADDITION TO OTHER NEIGHBORHOODS AND BUILDINGS LOCATED ALONG DRAINAGES WITHIN OR BELOW ANY OF THE BURNED BASINS...CAN BE IMPACTED BY DEBRIS FLOWS. DEBRIS FLOWS ISSUING FROM BURNED BASINS CAN IMPACT ROADS TRAVELING UP SILVERADO CREEK...WILLIAMS CANYON...HARDING CANYON AND MODJESKA CREEK...AS WELL AS ANY OTHER ROADS WITHIN THE BURNED AREA... PARTICULARLY WHERE THEY CROSS BURNED DRAINAGES. RESIDENTS AND MOTORISTS IN AND BELOW RECENTLY BURNED AREAS SHOULD BE ALERT TO HEAVY MUD AND DEBRIS FLOWS WHICH MAY BLOCK ROADS AND CULVERTS. POTENTIALLY DANGEROUS FLOODING AND PROPERTY LOSS COULD RESULT IN AREAS WHERE RUNOFF IS RESTRICTED OR BLOCKED. ADDITIONAL RAINFALL AMOUNTS OF ONE-HALF INCH PER HOUR ARE POSSIBLE IN THE WARNED AREA. LAT...LON 3374 11754 3362 11763 3372 11780 3378 11776 TIME...MOT...LOC 0925Z 180DEG 0KT 3370 11767 $$ SGX
The office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 4, 7:54 PM PST | Flash Flood Warning | SGX | Riverside, San Bernardino | 9 hr |
| Jan 5, 2:36 AM PST | Flash Flood Warning | SGX | San Bernardino | 114 min |
| Jan 5, 4:00 AM PST | Flash Flood Warning | SGX | San Diego | 4 hr |
| Jan 5, 4:21 AM PST | Flash Flood Warning | SGX | San Bernardino | 4 hr |
| Jan 5, 4:37 AM PST | Flash Flood Warning | SGX | Orange | 4 hr |
| Jan 5, 5:05 AM PST | Heavy Snow Warning | SGX | Riverside, San Bernardino | 51 hr |
| Jan 5, 5:18 AM PST | Dense Fog Advisory | SGX | Orange, Riverside, San Bernardino, San Diego | 51 hr |
| Jan 5, 10:25 AM PST | Flash Flood Warning | SGX | San Diego | 2 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.