Alert archive / California / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 45, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Aug 17, 2000, 5:40 PM PDT for Imperial County, California. It was in force for 60 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 17, 2000, 5:40 PM PDT (00:40 UTC)
- Expired
- Aug 17, 2000, 6:40 PM PDT
- In force
- 60 min
- Issued by
- NWS Phoenix, AZ
- Area
- Whole counties
County Imperial County, CA
The nearest sounding before it
San Diego, CA (KNKX), launched 00:00Z, 0.7 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
- 2347 m above ground
- 0-6 km bulk shear
- 4 kt
- 0-1 km storm-relative helicity
- 21 m²/s²
- 0-3 km storm-relative helicity
- 8 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.
NWS Phoenix, AZ wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 17, 2:54 PM PDT, 2 hours 46 minutes earlier.
Area forecast discussion, Aug 17, 2:54 PM PDT, 2 hours 46 minutes before
AZZ020>028-CAZ030>033-180545- SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PHOENIX AZ 245 AM MST THU AUG 17 2000 .SYNOPSIS... LOW PRESSURE ALOFT OVER NORTHERN BAJA...COUPLED WITH REMNANTS OF OLD TROPICAL STORM BERYL MOVING OVER SOUTHEAST ARIZONA...WILL RESULT IN SHOWERS AND THUNDERSTORMS OVER MUCH OF SOUTHWEST AND SOUTH-CENTRAL ARIZONA INTO THE WEEKEND...INCLUDING FAR SOUTHEAST CALIFORNIA FRIDAY NIGHT. HEAVY RAINFALL WILL BE POSSIBLE WITH SOME STORMS AND A FLASH FLOOD WATCH IS IN EFFECT FOR SOUTH-CENTRAL ARIZONA TONIGHT. AS THE REMNANTS OF BERYL MOVE NORTH...CONDITIONS WILL IMPROVE OVER THE AREA THIS WEEKEND...RETURNING TO A NORMAL MONSOON REGIME WITH CHANCES OF AFTERNOON AND EVENING THUNDERSTORMS ON THE HIGHER TERRAIN OF SOUTH- CENTRAL ARIZONA AND SLIGHT CHANCES ON THE DESERTS...WITH SOUTHEAST CALIFORNIA STAYING MOSTLY CLEAR TO PARTLY CLOUDY. .DISCUSSION... SOME OF THE WHAT IS LEFT OF TS BERYL IS STILL HEADED THIS WAY...AND LOW LEVEL MOISTURE HAS INCREASED ON THE DESERTS DUE TO GULF SURGE AND OUTFLOW FROM STORMS LAST NIGHT AND EARLY THIS MORNING. 18Z SOUNDINGS INDICATE P-WATER HAS INCREASED AGAIN...WITH AN INCH AND TWO-THIRDS AT YUMA AND ALMOST AN INCH AND A HALF AT PHOENIX. FLASH FLOOD WATCH HAS BEEN ISSUED FOR SOUTH-CENTRAL ARIZONA FOR TONIGHT...INCLUDING ALL OF MARICOPA...NW PINAL AND SRN GILA COUNTIES AND COMMUNITIES THEREIN. QPF ESTIMATED IN EXCESS OF AN INCH FOR MUCH OF THE SOUTH-CENTRAL AZ REGION...WITH MOST OF IT EXPECTED OVERNIGHT. FOR CONTINUITY...WILL GO ALONG WITH THE IDEA OF THE AVN AND KEEP A MENTION OF STORMS IN FAR SW AZ AND FAR SE CA FOR FRI NIGHT...ALTHOUGH THE ETA IMPLIES OTHERWISE. LOOKS LIKE THE MAIN EVENT...INVOLVING REMNANTS OF BERYL...WILL BE OVER FRI NIGHT...WITH A RETURN TO GENERAL MONSOON WEATHER. HOWEVER... MODELS INDICATE AT LEAST THE ERN HALF OF THE CWA WILL REMAIN IN AN AREA OF DEFORMATION UNDER UPPER-LEVEL DIFLUENCE...AND STORMS WILL BE DEVELOPING ON THE HIGHER TERRAIN AND DRIFTING OFF TO LOWER ELEVATIONS IN THE EVENING AND STEERING FLOW WILL BE TOUGH TO CALL. THEREFORE... A GENERAL CHANCE OF STORMS FOR ERN PORTIONS OF CWA FOR THE EXTENDED PERIOD SHOULD SUFFICE. WILT
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 17, 6:57 PM PDT | Flash Flood Warning | PSR | Riverside | 2 hr |
Nearby
Severe Thunderstorm Warnings in California, 2000Every severe thunderstorm warning in 2000
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.