Alert archive / California / Severe Thunderstorm Warnings in 1989
Severe Thunderstorm Warning 3, NWS San Diego, CA
NWS San Diego, CA issued this severe thunderstorm warning at Aug 9, 1989, 7:00 PM PDT for Imperial County, California. It was in force for 2 hr. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
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 San Diego, CA
- Area
- Whole counties
County Imperial County, CA
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 9, 7:20 PM PDT | Thunderstorm Wind 52 | Imperial, CA |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
San Diego, CA (KNKX), launched 00:00Z, 2.0 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
- 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 severe thunderstorm 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, 1:41 PM PDT, 5 hours 19 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 1:40 PM PDT WED AUG 09 1989 ...DEVELOPING THUNDERSTORMS HAVE PROMPTED A FLASH FLOOD WATCH FOR SAN DIEGO MOUNTAINS AND DESERTS TIL 9 PM PDT... THUNDERSTORMS IN A MOIST SOUTHERLY FLOW ARE RAPIDLY DEVELOPING AND HAVE PROMPTED A FLASH FLOOD WATCH FORTHE MOUNTAINS AND DESERTS OF SAN DIEGO COUNTY UNTIL 9 TONIGHT. SATELLITE PICTURES AND RADAR INDICATES THUNDERSTORMS ERUPTING RAPIDLY IN THE MOUNTAINS AND DESERTS OF SAN DIEGO COUNTY WITH STORMS HEADING NORTH. HEAVIEST RAINS SO FAR HAVE BEEN REPORTED FROM THE SANTA YSABEL ALERT RAIN GAGE WHERE 0.67 INCH FELL IN A HALF HOUR. SO FAR .08 INCH AT CUYAMACA. A FLASH FLOOD WATCH MEANS THAT FLASH FLOODING OF WASHES...SMALL STREAMS...RIVERS AND OTHER DRAINAGE AREAS IS POSSIBLE IN THE WATCH AREA. IF YOU ARE IN THE WATCH AREA KEEP AN EYE ON THE CHANGING WEATHER AND BE READY FOR IMMEDIATE ACTION IF HEAVY RAINS BEGIN OR A WARNING IS ISSSUED. SHIGEHARA
The office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 7:00 PM PDT | Flash Flood Warning | SGX | Imperial | 2 hr |
| Aug 10, 3:33 PM PDT | Flash Flood Warning | SGX | San Diego | 57 min |
Nearby
Severe Thunderstorm Warnings in California, 1989Every severe thunderstorm 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.