Alert archive / California / Flash Flood Warnings in 1986
Flash Flood Warning 4, NWS Los Angeles, CA
NWS Los Angeles, CA issued this flash flood warning at Aug 9, 1986, 3:52 PM PDT for Riverside County, California. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Aug 9, 1986, 3:52 PM PDT (22:52 UTC)
- Expired
- Aug 9, 1986, 6:00 PM PDT
- In force
- 2 hr
- Issued by
- NWS Los Angeles, CA
- Area
- Whole counties
County Riverside County, CA
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
San Diego, CA (KNKX), launched 12:00Z, 10.9 hours before the alert went out and 154 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
- 3622 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- 27 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 9, 1:03 PM PDT, 2 hours 49 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LOS ANGELES CA 100 PM PDT SAT AUG 9 1986 ...WIDELY SCATTERED THUNDERSTORMS DEVELOP MOUNTAINS AND DESERTS... RADAR DETECTS WIDELY SCATTERED THUNDERSTORMS DEVELOPING IN THE MOUNTAINS AND DESERTS OF SOUTHERN CALIFORNIA THIS SATURDAY AFTERNOON. AT 1245 PM...THUNDERSTORMS WERE DETECTED TO THE WEST OF TWENTY NINE PALMS...TO THE NORTHWEST OF BIG BEAR LAKE AND IN THE SANTA ROSA MOUNTAINS TO THE WEST OF THE SALTON SEA. RADAR TOPS NEAR TWENTY NINE PALMS EXCEED FOURTY THOUSAND FEET...AND MOTORISTS ALONG STATE HIGHWAY 62 BETWEEN TWENTY NINE PALMS AND YUCCA VALLEY SHOULD BE ALERT FOR STRONG GUSTY WINDS AND POSSIBLE HAIL FOR THE NEXT ONE TO TWO HOURS. ALSO...THE THUNDERSTORMS NEAR BIG BEAR LAKE HAVE BEEN PERSISTENT FOR THE LAST HOUR. LOCAL HEAVY RAIN IS POSSIBLE. MOIST TROPICAL AIR CONTINUES TO MOVE INTO THE MOUNTAINS AND DESERTS OF SOUTHERN CALIFORNIA...AND THUNDERSTORMS ARE EXPECTED TO PERSIST IN THE AFTERNOON AND EVENING HOURS THE REMAINDER OF THIS WEEKEND. BOB GREBE
Special weather statement, Aug 9, 2:52 PM PDT, 1 hour before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LOS ANGELES CA
100 PM PDT SAT AUG 9 1986
...MOUNTAIN AND DESERT THUNDERSTORMS CONTINUE...
RADAR DETECTS SCATTERED THUNDERSTORMS IN THE MOUNTAINS AND DESERTS
OF SOUTHERN CALIFORNIA.
AT 245 PM...THUNDERSTORMS WERE DETECTED NEAR TWENTY NINE PALMS AND
NEAR BIG BEAR LAKE...AS WELL AS...THE SANTA ROSA MOUNTAINS.
RADAR TOPS NEAR TWENTY NINE PALMS EXCEED FOURTY THOUSAND FEET...AND
MOTORISTS ALONG STATE HIGHWAY 62 BETWEEN TWENTY NINE PALMS AND YUCCA
VALLEY SHOULD BE ALERT FOR STRONG GUSTY WINDS AND POSSIBLE HAIL FOR
THE NEXT SEVERAL HOURS.
ALSO...THE THUNDERSTORMS NEAR BIG BEAR LAKE HAVE BEEN PERSISTENT FOR
SEVERAL HOURS. LOCAL HEAVY RAIN IS POSSIBLE.
.
MOIST TROPICAL AIR CONTINUES TO MOVE INTO THE MOUNTAINS AND DESERTS
OF SOUTHERN CALIFORNIA...AND THUNDERSTORMS ARE EXPECTED TO PERSIST
IN THE AFTERNOON AND EVENING HOURS THE REMAINDER OF THIS WEEKEND.
BOB GREBEThe office that day
Everything else NWS Los Angeles, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 3:52 PM PDT | Flash Flood Warning | LOX | San Bernardino | 2 hr |
Nearby
Flash Flood Warnings in California, 1986Every flash flood warning in 1986
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.