Alert archive / California / Flash Flood Warnings in 1989

Flash Flood Warning 8, NWS Los Angeles, CA

August 10, 1989Riverside County, California

NWS Los Angeles, CA issued this flash flood warning at Aug 10, 1989, 12:15 AM PDT for Riverside County, California. It was in force for 105 min.

The area

The counties it named.

The facts

Issued
Aug 10, 1989, 12:15 AM PDT (07:15 UTC)
Expired
Aug 10, 1989, 2:00 AM PDT
In force
105 min
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, 7.3 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.

Skew-T log-pSkew-T log-p diagram, San Diego, CA at 00:00Z on 1989-08-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, San Diego, CA at 00:00Z on 1989-08-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 16 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
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

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

Everything else NWS Los Angeles, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 9, 5:20 PM PDTFlash Flood WarningLOXSan Bernardino100 min
Aug 9, 5:20 PM PDTSevere Thunderstorm WarningLOXSan Bernardino100 min
Aug 9, 7:00 PM PDTFlash Flood WarningLOXRiverside2 hr
Aug 9, 7:00 PM PDTFlash Flood WarningLOXSan Bernardino2 hr
Aug 9, 7:00 PM PDTSevere Thunderstorm WarningLOXSan Bernardino2 hr
Aug 9, 7:00 PM PDTSevere Thunderstorm WarningLOXRiverside2 hr
Aug 9, 8:30 PM PDTFlash Flood WarningLOXRiverside90 min
Aug 9, 8:30 PM PDTSevere Thunderstorm WarningLOXRiverside90 min
Aug 9, 10:00 PM PDTFlash Flood WarningLOXRiverside2 hr

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.