Alert archive / California / Flash Flood Warnings in 1989
Flash Flood Warning 4, NWS Los Angeles, CA
NWS Los Angeles, CA issued this flash flood warning at Aug 9, 1989, 7:00 PM PDT for Riverside County, California. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Aug 9, 1989, 7:00 PM PDT (02:00 UTC)
- Expired
- Aug 9, 1989, 9:00 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 00:00Z, 2.0 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
- 3643 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 45 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
Local storm report, Aug 9, 1:56 PM PDT, 5 hours 4 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE LOS ANGELES, CA
1255 PM PST WED AUG 09 1989
FOLLOWING INFORMATION IS FROM THE SERIES OF THUNDERSTORMS IN
SOUTHERN CALIFORNIA ON AUGUST 8 1989.
THUNDERSTORMS FORMED ALONG THE EAST SIDE OF MANY OF THE MOUNTAIN
RANGES DURING THE AFTERNOON. THE MORE SIGNIFICANT ONES PRODUCED HEAVY
SHOWERS OVER THE HIGHER REACHES OF THE MOUNTAINS WITH LIGHTER AMOUNTS
IN THE VALLEY AREAS.
509PM PDT...INYO COUNTY...10S OF LONE PINE. HEAVY RAINS IN THE MOUNTAINS
CAUSED MUD TO COVER ALL 4 LANES OF U.S. 395 APPROXIMATELY
1-1 1/2 FT DEEP. ROAD CLOSED FROM 515PM TO 430AM WED.
706PM PDT...INYO COUNTY...OLANCHA. APPROXIMATELY 1 MILE NORTH AND SOUTH
OF HIGHWAYS 395/190 JUNCTION. FLOW FROM MOUNTAIN THUNDER/
STORMS WASHED CONSIDERABLE DEBRIS INTO AQUEDUCT COMPLETELY
DAMMING IT. WATER AND MUD WAS OVER HIGHWAY JUNCTION AREA.
1 MILE OF AQUEDUCT COMPLETELY FILLED WITH DEBRIS AND MORE
THAN 1 MILE WITH VARIOUS AMOUNTS OF DEBRIS. 10-14 DAYS
ESTIMATED TO CLEAR.
SOME DEBRIS OVER HIGHWAY 168 NEAR DEEP SPRINGS AREA ESE OF BISHOP DUE
TO HEAVY RAINS. LOCAL FLOODING OCCURRED IN THE SHERWOOD CREEK AREA
SW OF BISHOP IN THE LATE AFTERNOON AND EVENING.
IN MONO COUNTY...LOCAL FLOODING 10-15 W OF LEE VINING WHERE HEAVY RAIN
REPORTED FOR 1-2 HOURS. ROCK AND DEBRIS SLIDES NEAR TIOGA PASS WITH
A CAR OFF THE ROAD DURING MORNING OF AUG 8 DUE TO RAINS.
RAINFALL REPORTS...
OAK CREEK .40 CAINE RANCH .61
ROUND VALLEY .10 TINAMAHA...S OF BIG PINE. .08
BENTON .13 LONE PINE OVER 1.00
ROCK CREEK .10 INDEPENDENCE .18
WILD ROSE .08 HAIWEE .08
STOVEPIPE WELLS .20 BISHOP T
BIG PINE .21 MAMMOTH LAKES OVER 1.00
LONG VALLEY .39
M_CDUFFIEThe office that day
Everything else NWS Los Angeles, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 5:20 PM PDT | Flash Flood Warning | LOX | San Bernardino | 100 min |
| Aug 9, 5:20 PM PDT | Severe Thunderstorm Warning | LOX | San Bernardino | 100 min |
| Aug 9, 7:00 PM PDT | Flash Flood Warning | LOX | San Bernardino | 2 hr |
| Aug 9, 7:00 PM PDT | Severe Thunderstorm Warning | LOX | San Bernardino | 2 hr |
| Aug 9, 7:00 PM PDT | Severe Thunderstorm Warning | LOX | Riverside | 2 hr |
| Aug 9, 8:30 PM PDT | Flash Flood Warning | LOX | Riverside | 90 min |
| Aug 9, 8:30 PM PDT | Severe Thunderstorm Warning | LOX | Riverside | 90 min |
| Aug 9, 10:00 PM PDT | Flash Flood Warning | LOX | Riverside | 2 hr |
| Aug 10, 12:15 AM PDT | Flash Flood Warning | LOX | Riverside | 105 min |
Nearby
Flash Flood Warnings in California, 1989Every flash flood warning in 1989
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.