Alert archive / California / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 17, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Jul 22, 1997, 4:14 PM PDT for Imperial County, California. It was in force for 71 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
- Jul 22, 1997, 4:14 PM PDT (23:14 UTC)
- Expired
- Jul 22, 1997, 5:25 PM PDT
- In force
- 71 min
- Issued by
- NWS Phoenix, AZ
- Area
- Whole counties
County Imperial County, CA
The nearest sounding before it
Yuma Intl Airpor, AZ (KYUM), launched 12:00Z, 11.2 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
- 344 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1635 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- 59 m²/s²
- 0-3 km storm-relative helicity
- 82 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KPHX 222315 RRA SVRPHX CAC025-230025- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PHOENIX AZ 414 PM MST (414 PM PDT) TUE JUL 22 1997 * SEVERE THUNDERSTORM WARNING FOR IMPERIAL COUNTY IN SOUTHEASTERN CALIFORNIA * UNTIL 525 PM PDT (525 PM MST) * SOME LOCATIONS AFFECTED OCOTILLO PLASTER CITY SEELEY HEBER CALEXICO THE SEVERE THUNDERSTORM WARNING ISSUED EARLIER FOR SOUTH CENTRAL IMPERIAL COUNTY HAS BEEN EXPANDED TO INCLUDE PORTIONS OF SOUTHWEST IMPERIAL COUNTY UNTIL 525 PM PDT. NUMEROUS THUNDERSTORMS ARE MOVING NORTH INTO MUCH OF SOUTHWEST AND SOUTH CENTRAL IMPERIAL COUNTY FROM MEXICO. MANY OF THESE STORMS LIKELY CONTAIN STRONG WINDS IN EXCESS OF 57 MPH... INTENSE RAIN AND HAIL. THUNDERSTORMS ARE MOVING NORTH AT 12 MPH. THESE ARE DANGEROUS STORMS. TAKE SHELTER IMMEDIATELY IF THREATENING WEATHER APPROACHES. STAY AWAY FROM WINDOWS AND THE HAZARDS OF FLYING GLASS AND DEBRIS. VASQUEZ
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, Jul 22, 2:56 PM PDT, 1 hour 18 minutes before
AZZ020>025-CAZ030>033-230130- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE PHOENIX AZ 245 PM MST/PDT TUE JUL 22 1997 ...SLIGHT RISK FOR SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING OVER PORTIONS OF THE FAR SOUTHEAST CALIFORNIA DESERTS NEAR IMPERIAL... SCATTERED THUNDERSTORMS DEVELOPED OVER THE BAJA CALIFORNIA MOUNTAINS SOUTH OF IMPERIAL AND MEXICALI THIS AFTERNOON. THESE STORMS WERE MOVING NORTH TOWARD WESTERN IMPERIAL COUNTY. THERE IS A SLIGHT RISK OF DAMAGING STRAIGHTLINE WINDS AND LOCALLY HEAVY RAINFALL IN WESTERN IMPERIAL COUNTY. THE FAVORED LOCATIONS FOR STRONG THUNDERSTORMS IN WESTERN IMPERIAL COUNTY ARE FROM THE TOWNS OF HOLTVILLE AND BRAWLEY WESTWARD TO THE SAN DIEGO COUNTY LINE. THIS INCLUDES PORTIONS OF INTERSTATE 8 AND THE SOUTHWESTERN SHORES OF THE SALTON SEA. .................................................................... THE OUTLOOK AREA INCLUDES THE FOLLOWING COUNTIES... IN ARIZONA IN CALIFORNIA MARICOPA YUMA IMPERIAL SOUTHERN GILA LA PAZ CENTRAL/EASTERN RIVERSIDE NORTHWEST PINAL VASQUEZ
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 22, 3:08 PM PDT | Severe Thunderstorm Warning | PSR | Imperial | 92 min |
Nearby
Severe Thunderstorm Warnings in California, 1997Every severe thunderstorm warning in 1997
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.