Alert archive / Arizona / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 18, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Jul 22, 1997, 4:57 PM MST for Yuma County, Arizona. It was in force for 78 min. 3 reports 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
- Jul 22, 1997, 4:57 PM MST (23:57 UTC)
- Expired
- Jul 22, 1997, 6:15 PM MST
- In force
- 78 min
- Issued by
- NWS Phoenix, AZ
- Area
- Whole counties
County Yuma County, AZ
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 22, 5:55 PM MST | Thunderstorm Wind 52 | Yuma, AZ | |
| Jul 22, 5:55 PM MST | Hail 0.75 | Yuma, AZ | |
| Jul 22, 6:22 PM MST | Thunderstorm Wind 52 | Yuma, AZ | Reports of several downed power poles. |
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
Yuma Prvg Ground, AZ (K1Y7), launched 12:00Z, 12.0 hours before the alert went out and 55 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 222358 RRA SVRPHX AZC027-230115- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PHOENIX AZ 457 PM MST TUE JUL 22 1997 * SEVERE THUNDERSTORM WARNING FOR WESTERN YUMA COUNTY IN SOUTHWESTERN ARIZONA * UNTIL 615 PM MST * SOME LOCATIONS AFFECTED SAN LUIS...GADSDEN...SOMERTON AND YUMA * AT 455 PM MST RADAR INDICATED SEVERE THUNDERSTORMS OVER FAR SOUTHWEST YUMA COUNTY AND DEVELOPING EASTWARD. MOVEMENT OF THE STORMS WAS TO THE NORTH AND NORTHEAST AT 10 MPH. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH... HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME VOR BUSINESS. JAH
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 MST, 2 hours 1 minute 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
Nearby
Severe Thunderstorm Warnings in Arizona, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.