Alert archive / California / Flash Flood Warnings in 1992
Flash Flood Warning 6, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Aug 23, 1992, 1:55 PM PDT for Imperial County, California. It was in force for 61 min.
The area
The counties it named.
The facts
- Issued
- Aug 23, 1992, 1:55 PM PDT (20:55 UTC)
- Expired
- Aug 23, 1992, 2:56 PM PDT
- In force
- 61 min
- Issued by
- NWS San Diego, CA
- Area
- Whole counties
County Imperial County, CA
The nearest sounding before it
San Diego, CA (KNKX), launched 12:00Z, 8.9 hours before the alert went out and 173 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
- 1861 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 65 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSAN 232055 FFWSAN CAC025-232200- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SAN DIEGO CA 155 PM PDT SUN AUG 23 1992 THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 300 PM PDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHEAST CALIFORNIA ...NORTHEASTERN IMPERIAL COUNTY A FLASH FLOOD WARNING IS IN EFFECT FOR NORTHEAST IMPERIAL COUNTY UNTIL 3 PM PDT. IMPERIAL COUNTY HIGHWAY PATROL AND IMPERIAL COUNTY SHIERIFFS REPORT FLASH FLOODING ON HIGHWAY 78 NEAR PALO VERDE AND THE HIGHWAY IS CLOSED IN THIS AREA. RADAR AND SATELLITE INDICATE THUNDERSTORMS WITH HEAVY RAIN IN NORTHEAST IMPERIAL COUNTY. THESE THUNDERSTORMS WILL LIKELY CAUSE FLASH FLOODING FOR AT LEAST THE NEXT HOUR. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. MOVE TO HIGHER GROUND. MOST DEATHS IN FLASH FLOODING OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. ATKIN
What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Aug 23, 11:23 AM PDT, 2 hours 32 minutes before
CAC025-232300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 1120 AM PDT SUN AUG 23 1992 ...THUNDERSTORMS DEVELOPING IN NORTHEAST IMPERIAL COUNTY... AT 11 AM RADAR INDICATES THAT THUNDERSTORMS...SOME HEAVY...ARE DEVELOPING IN NORTHCENTRAL AND NORTHEAST IMPERIAL COUNTY...MAINLY FROM THE CHOCOLATE MOUNTAINS TO PALO VERDE AT THE RIVERSIDE COUNTY LINE. THESE THUNDERSTORMS HAVE THE POTENTIAL TO PRODUCE HEAVY...FLOOD CAUSING RAINS...DANGEROUS LIGHTNING AND LOCAL WIND GUSTS TO NEAR 40 MPH. SMALL HAIL IS ALSO A POSSIBILITY. THESE STORMS SHOULD MOVE GENERALLY TO THE NORTHEAST. THESE STORMS ARE THE RESULT OF A COLD FRONT MOVING SLOWLY EAST THROUGH IMPERIAL COUNTY COLLIDING WITH MOIST MOVING NORTH FROM TROPICAL STORM LESTER LOCATED ABOUT 300 MILES SOUTH IN MEXICO. . FURTHER DEVELOPMENT OF THUNDERSTORMS IN THE EASTERN HALF OF IMPERIAL COUNTY CAN OCCUR THROUGHOUT THIS AFTERNOON. THIS WEATHER SITUATION HAS POTENTIAL TO@ TURN DANGEROUS AT ANY TIME THIS AFTERNOON...AND PEOPLE IN AND TRAVELLING THROUGH IMPERIAL COUNTY SHOULD BE PREPARED TAKE ACTION IF THREATENING WEATHER APPROACHES. HEPBURN
Nearby
Flash Flood Warnings in California, 1992Every flash flood warning in 1992
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.