Alert archive / California / Flash Flood Warnings in 1998
Flash Flood Warning 3, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Feb 7, 1998, 11:45 PM PST for Orange County, California. It was in force for 75 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Feb 7, 1998, 11:45 PM PST (07:45 UTC)
- Expired
- Feb 8, 1998, 1:00 AM PST
- In force
- 75 min
- Issued by
- NWS San Diego, CA
- Area
- Whole counties
County Orange County, CA
The nearest sounding before it
San Diego, CA (KNKX), launched 00:00Z, 7.8 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
- 1 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1095 m above ground
- 0-6 km bulk shear
- 2 kt
- 0-1 km storm-relative helicity
- 1 m²/s²
- 0-3 km storm-relative helicity
- 4 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 080748 COR FFWSAN CAC059-080900- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING...CORRECTION NATIONAL WEATHER SERVICE SAN DIEGO CA 1145 PM PST SAT FEB 7 1998 THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 100 AM PST FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHWEST CALIFORNIA ...SOUTHERN ORANGE COUNTY DOPPLER RADAR AND AUTOMATED RAIN GAUGES INDICATE VERY HEAVY RAINS OVER SOUTHERN ORANGE COUNTY WHICH ARE CAPABLE OF SIGNIFICANT FLASH FLOODING. LAGUNA BEACH REPORTED 0.94 INCHES OF RAIN IN THE HALF HOUR PERIOD BETWEEN 1110 PM AND 1140 PM. THUNDERSTORMS WITH HEAVY RAIN WILL CONTINUE TO MOVE INTO SOUTHERN ORANGE COUNTY FROM THE OCEAN BETWEEN 1145 PM AND 1 AM...AND FLASH FLOODING IS EXPECTED IN THESE AREAS. ...CORRECTED EXPIRATION TIME... MAXWELL
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.
NWS San Diego, CA wrote its last area forecast discussion before this flash flood warning went out at Feb 7, 9:40 PM PST, 2 hours 5 minutes earlier.
Area forecast discussion, Feb 7, 9:40 PM PST, 2 hours 5 minutes before
SOUTHWESTERN CALIFORNIA AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
940 PM PST SAT FEB 7 1998
...SYNOPSIS...
HEAVY SURF ADVISORY THROUGH SUNDAY. WINTER WEATHER ADVISORY IN THE
MOUNTAINS ABOVE 5500 FT UNTIL 6 AM SUNDAY. URBAN FLOOD ADVISORY
FOR ORANGE COUNTY UNTIL 10 PM. A WEST-TO-EAST ORIENTED FRONT WILL
SLOWLY MOVE SOUTH OVERNIGHT...DROPPING FROM 1 TO 2 INCHES OF RAIN IN
ORANGE COUNTY AND 1/2 TO 1 INCH ELSEWHERE WEST OF THE MOUNTAINS. SNOW
LEVEL NEAR 7000 FEET TONIGHT...LOWERING TO 5000 FEET BY MORNING. RAIN
SHOULD TAPER TO SHOWERS IN THE MORNING.
...DISCUSSION...
STRONG 300 MB DIVERGENCE ASSOCIATED WITH NW QUADRANT OF 110 KT ZONAL
JET DOING A GOOD JOB OF LIFTING A 15000 FT DEEP MOIST LAYER TONIGHT...
AND CAUSING HEAVY RAINS IN ORANGE COUNTY...AND EXTREME WESTERN RIV
AND SBD COUNTIES. THIS WILL WEAKEN OVERNIGHT...AND ASSOCIATED WEST
TO EAST FRONT WIIL SLOWLY MOVE SOUTH. MUCH OF MOIST AIR SEEMS TO
ORIGINATE FROM THE MALAYSIAN PLUME...JUST ANOTHER ABBERATION OF EL
NINO. THOUGHT THE JET WOULD BECOME ANTICYCLONIC BEFORE COMING INTO
ORANGE COUNTY...BUT IT DIDNT. BUT ALL MODELS SHOW JET ZONALIZING
AND LIFTING NORTHWARD LATE SUNDAY. ONE MORE SHORT WAVE SUNDAY NIGHT
STILL HAS A GOOD CHANCE FOR LESSER RAIN...THEN RIDGING GIVING SCALIF
A BREAK FROM THE RAINS.
SAN WB 054/062 052/063 051 149632
MACKECHNIEThe office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 8, 3:30 AM PST | Flash Flood Warning | SGX | San Diego | 90 min |
Nearby
Flash Flood Warnings in California, 1998Every flash flood warning in 1998
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.