Alert archive / California / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 21, NWS Hanford, CA
NWS Hanford, CA issued this severe thunderstorm warning at Aug 31, 1998, 3:07 PM PDT for Kern County, California. It was in force for 58 min. 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 31, 1998, 3:07 PM PDT (22:07 UTC)
- Expired
- Aug 31, 1998, 4:05 PM PDT
- In force
- 58 min
- Issued by
- NWS Hanford, CA
- Area
- Whole counties
County Kern County, CA
The radar
The Edwards AFB radar (KEYX), 110 km from the middle of the area, began a volume at 22:07 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 31, 3:30 PM PDT | Thunderstorm Wind | Lake Isabella, 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.
The nearest sounding before it
Lompoc (Awos), CA (KLPC), launched 12:00Z, 10.1 hours before the alert went out and 170 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
- 419 J/kg
- Mixed-layer CIN
- -160 J/kg
- Mixed-layer LCL
- 2792 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 6 m²/s²
- 0-3 km storm-relative helicity
- 36 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
793 WUUS1 KFAT 312208 RRA SVRFAT CAC029-312305- BULLETIN-EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM AND FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA 307 PM PDT MON AUG 31 1998 THE NATIONAL WEATHER SERVICE IN HANFORD HAS ISSUED A * SEVERE THUNDERSTORM AND FLASH FLOOD WARNING FOR... EASTERN AND CENTRAL KERN COUNTY IN CENTRAL CALIFORNIA * UNTIL 405 PM PDT * AT 300 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 5 MILES EAST OF MOUNTAIN MESA WHICH IS 15 MILES WEST OF INYOKERN...MOVING SOUTHWEST AT 10 MPH. * THE SEVERE THUNDERSTORM WILL BE... IN THE PIUTE MOUNTAINS AT 400 PM. DAMAGING WINDS AND HEAVY RAIN ARE LIKELY. AVOID DRY CREEKS AND WASHES THAT MAY SUDDENLY FLOOD. IF YOU ARE OUTDOORS MOVE INTO A STURDY BUILDING AND STAY AWAY FROM WINDOWS MENDENHALL
The office that day
Everything else NWS Hanford, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 31, 3:07 PM PDT | Flash Flood Warning | HNX | Kern | 58 min |
Nearby
Severe Thunderstorm Warnings in California, 1998Every severe thunderstorm 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.