Alert archive / California / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 51, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Aug 24, 2000, 3:30 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 24, 2000, 3:30 PM PDT (22:30 UTC)
- Expired
- Aug 24, 2000, 4:30 PM PDT
- In force
- 60 min
- Issued by
- NWS Phoenix, AZ
- Area
- Whole counties
County Imperial County, CA
The radar
The Yuma radar (KYUX), 90 km from the middle of the area, began a volume at 22:29 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.
The nearest sounding before it
Yuma Intl Airpor, AZ (KYUM), launched 12:00Z, 10.5 hours before the alert went out and 84 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
- 906 J/kg
- Mixed-layer CIN
- -127 J/kg
- Mixed-layer LCL
- 1657 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 35 m²/s²
- 0-3 km storm-relative helicity
- 21 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
358 WUUS55 KPSR 242322 SVRPHX CAC025-242330- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PHOENIX AZ 330 PM MST (330 PM PDT) THU AUG 24 2000 TEST...TEST...TEST. $$
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 24, 2:55 PM PDT, 35 minutes earlier.
Area forecast discussion, Aug 24, 2:55 PM PDT, 35 minutes before
AZZ020>028-CAZ030>033-250545- SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PHOENIX AZ 255 PM MST THU AUG 24 2000 .SYNOPSIS... HIGH PRESSURE ALOFT IS EXPECTED TO CONTINUE CENTERED AROUND COLORADO AND OKLAHOMA THE REST OF THE WEEK AND EARLY NEXT WEEK. THIS WILL CONTINUE A MOIST FLOW OF AIR FROM THE SOUTHEAST OVER ARIZONA AND SOUTHEAST CALIFORNIA. A LOW PRESSURE SYSTEM IN THIS FLOW IS EXPECTED TO HELP ENHANCE THUNDERSTORMS WITH LOCALLY HEAVY RAIN OVER PORTIONS OF SOUTHEAST CALIFORNIA INTO THIS EVENING. ANOTHER LOW PRESSURE SYSTEM IS EXPECTED TO ENHANCE THUNDERSTORMS OVER SOUTH-CENTRAL ARIZONA LATE TONIGHT THROUGH FRIDAY NIGHT. .DISCUSSION... THE GENERAL FLOW ALOFT FROM THE SOUTHEAST WITH MOIST AND UNSTABLE AIR CONTINUES OVER ARIZONA AND SOUTHEAST CALIFORNIA. A LOW PRESSURE SYSTEM IN THIS FLOW HAS ENHANCED THUNDERSTORMS WITH SOME HEAVY RAIN IN PORTIONS OF SOUTHEAST CALIFORNIA WHICH IS EXPECTED TO CONTINUE INTO THIS EVENING. FLASH FLOODING WAS REPORTED IN JOSHUA TREE NATIONAL PARK THIS AFTERNOON. A HAZARDOUS WEATHER OUTLOOK WAS ISSUED A FEW HOURS BEFORE THIS EVENT EMPHASIZING FLOODING OF NORMALLY DRY CREEKS AND WASHES IN SOUTHWEST ARIZONA AND SOUTHEAST CALIFORNIA THIS AFTERNOON AND EVENING. THE NEXT SYSTEM FROM NORTHERN MEXICO AND FAR SOUTHWEST TEXAS NEAR EL PASO IS EXPECTED TO AFFECT SOUTH-CENTRAL ARIZONA LATE TONIGHT CONTINUING WITH ENHANCEMENT OF SHOWERS AND THUNDERSTORMS THROUGH FRIDAY NIGHT WHICH IS COVERED IN THE FORECAST. CONTINUING SIMILAR BROAD BRUSH EXTENDED FORECAST SUNDAY THROUGH TUESDAY AS MORE MOISTURE FROM MEXICO MOVES INTO THE SOUTHWESTERN U.S. ELLIS
In the hours before
Special weather statement, Aug 24, 11:10 AM PDT, 4 hours 20 minutes before
AZZ020-021-025-026-CAZ030>033-242345-
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PHOENIX AZ
1111 AM MST (1111 AM PDT) THU AUG 24 2000
...SLIGHT RISK OF HAZARDOUS WEATHER OVER SOUTHWEST ARIZONA AND
EXTREME SOUTHEAST CALIFORNIA...
...COUNTIES IN THE RISK AREA INCLUDE...
IN ARIZONA...LA PAZ AND YUMA.
IN CALIFORNIA...IMPERIAL AND EASTERN RIVERSIDE.
...THE PRIMARY HAZARDOUS WEATHER RISKS INCLUDE...
HEAVY RAIN THAT THE COULD CAUSE FLOODING OF NORMALLY DRY
CREEKS AND WASHES.
...ADDITIONAL THREATS INCLUDE...
THUNDERSTORMS PRODUCING WIND GUSTS IN EXCESS OF 60 MPH.
BLOWING DUST WHICH COULD REDUCE VISIBILITY TO LESS THAN
ONE QUARTER MIL>E.
STORM SPOTTER ACTIVATION MAY BE NECESSARY LATER TODAY.
AHSpecial weather statement, Aug 24, 1:20 PM PDT, 2 hours 10 minutes before
AZZ020>028-CAZ030>033-250215-
HAZARDOUS WEATHER OUTLOOK...UPDATED...
NATIONAL WEATHER SERVICE PHOENIX AZ
121 PM MST (121 PM PDT) THU AUG 24 2000
...SLIGHT RISK OF HAZARDOUS WEATHER OVER SOUTH CENTRAL AND
SOUTHWEST ARIZONA...AND EXTREME SOUTHEAST CALIFORNIA THIS AFTERNOON
AND TONIGHT...
COUNTIES IN THE RISK AREA INCLUDE:
IN ARIZONA...MARICOPA...SOUTHERN GILA...NORTHWEST PINAL...
LA PAZ...AND YUMA.
IN CALIFORNIA...IMPERIAL AND EASTERN RIVERSIDE.
THE PRIMARY HAZARDOUS WEATHER RISKS INCLUDE:
THUNDERSTORMS PRODUCING WIND GUSTS IN EXCESS OF 60 MPH.
BLOWING DUST REDUCING VISIBILITY TO LESS THAN ONE QUARTER MILE.
HEAVY RAIN THAT COULD CAUSE FLOODING zOF STREETS AND NORMALLY
DRY CREEKS AND WASHES.
STORM SPOTTER ACTIVATION MAY BE NECESSARY LATER TODAY.
MBThe office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 24, 2:34 PM PDT | Flash Flood Warning | PSR | Riverside | 56 min |
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; radar from the NEXRAD Level II archive.