Alert archive / Arizona / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 26, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Jul 29, 1997, 8:40 PM MST for Maricopa County, Arizona. 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
- Jul 29, 1997, 8:40 PM MST (03:40 UTC)
- Expired
- Jul 29, 1997, 9:40 PM MST
- In force
- 60 min
- Issued by
- NWS Phoenix, AZ
- Area
- Whole counties
County Maricopa County, AZ
The radar
The Phoenix radar (KIWA), 77 km from the middle of the area, began a volume at 03:41 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
Tuscon, AZ (KTUS), launched 00:00Z, 3.7 hours before the alert went out and 198 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
- 804 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 2497 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 2 m²/s²
- 0-3 km storm-relative helicity
- 10 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 300341 RRA SVRPHX AZC013-300440- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PHOENIX AZ 840 PM MST TUE JUL 29 1997 * SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN MARICOPA COUNTY IN CENTRAL ARIZONA * UNTIL 940 PM MST * SOME LOCATIONS AFFECTED ARE.... GILA BEND AND VICINITY...INCLUDING PORTIONS OF INTERSTATE 8 AND STATE HIGHWAY 85. * AT 836 PM MST RADAR DETECTED A SEVERE THUNDERSTORM 8 MILES SOUTHEAST OF GILA BEND. MOVEMENT WAS TO THE NORTHWEST AT 9 MILES PER HOUR. DAMAGING WINDS IN EXCESS OF 57 MPH AND HAIL GREATER THAN 3/4 INCHES IN DIAMETER ARE LIKELY WITH THIS STORM. TAKE SHELTER IMMEDIATELY IF THREATENING WEATHER APPROACHES.D 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 29, 2:53 PM MST, 5 hours 47 minutes before
AZZ020>025-CAZ030>033-300130- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE PHOENIX AZ 245 PM MST/PDT TUE JUL 29 1997 ...SLIGHT RISK OF SEVERE THUNDERSTORMS THE REST OF THIS AFTERNOON AND EARLY TONIGHT OVER SOUTHERN GILA COUNTY AND THE TONTO NATIONAL FORESTS FOOTHILLS...EAST OF THE GREATER PHOENIX AREA... A SLIGHT RISK OF SEVERE THUNDERSTORMS WILL EXIST OVER THE FAR EASTERN PORTIONS OF THE OUTLOOK AREA...GENERALLY TO THE EAST OF THE GREATER PHOENIX AREA...THE REMAINDER OF THIS AFTERNOON AND EVENING. THE PRIMARY SEVERE WEATHER THREAT WILL BE STRONG...DAMAGING WINDS IN EXCESS OF 60 MPH. BRIEF...LOCALLY HEAVY RAIN IS ALSO POSSIBLE. ELSEWHERE WITHIN THE OUTLOOK AREA...ISOLATED EVENING THUNDERSTORMS ARE POSSIBLE OVER MUCH OF MARICOPA COUNTY...INCLUDING THE GREATER PHOENIX AREA. ALTHOUGH THESE THUNDERSTORMS ARE NOT EXPECTED TO BECOME SEVERE...THEY WILL HAVE THE POTENTIAL FOR WINDS OF OVER 30 MPH WHICH MAY PRODUCE AREAS OF BLOWING DUST. SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DIMINISH BEFORE MIDNIGHT. MEANWHILE...THE FAR SOUTHWEST ARIZONA DESERTS...AS WELL AS THE EXTREME SOUTHEAST PORTION OF CALIFORNIA ARE EXPECTED TO REMAIN FREE OF ANY THUNDERSTORMS THROUGH TONIGHT. ALTHOUGH THE AIR HAS DRIED OUT IN THE MID AND UPPER LEVELS OVER MOST OF THE OUTLOOK AREA...ENOUGH MOISTURE REMAINS TO GIVE THE ISOLATED THUNDERSTORM THREAT INTO THE EVENING HOURS. STRONGER...POSSIBLY SEVERE THUNDERSTORMS...WILL BE FOUND OVER THE FAR EASTERN OUTLOOK AREA DUE TO THE PRESENCE OF DEEPER MOISTURE ALONG WITH THE INTERACTION OF AN UPPER LEVEL DISTURBANCE APPROACHING FROM THE SOUTH. .................................................................... THE OUTLOOK AREA INCLUDES THE FOLLOWING COUNTIES... IN ARIZONA IN CALIFORNIA MARICOPA YUMA IMPERIAL SOUTHERN GILA LA PAZ CENTRAL/EASTERN RIVERSIDE NORTHWEST PINAL CRAIG ELLIS
Special weather statement, Jul 29, 3:04 PM MST, 5 hours 36 minutes before
AZZ020>025-CAZ030>033-300130- SEVERE WEATHER OUTLOOK...CORRECTION NATIONAL WEATHER SERVICE PHOENIX AZ 245 PM MST/PDT TUE JUL 29 1997 ...SLIGHT RISK OF SEVERE THUNDERSTORMS THE REST OF THIS AFTERNOON AND EARLY TONIGHT OVER SOUTHERN GILA COUNTY AND THE TONTO NATIONAL FORESTS FOOTHILLS...EAST OF THE GREATER PHOENIX AREA... A SLIGHT RISK OF SEVERE THUNDERSTORMS WILL EXIST OVER THE FAR EASTERN PORTIONS OF THE OUTLOOK AREA...GENERALLY TO THE EAST OF THE GREATER PHOENIX AREA...THE REMAINDER OF THIS AFTERNOON AND THIS EVENING. THE PRIMARY SEVERE WEATHER THREAT WILL BE STRONG...DAMAGING WINDS IN EXCESS OF 60 MPH. BRIEF...LOCALLY HEAVY RAIN IS ALSO POSSIBLE. MOST SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DIMINISH BEFORE MIDNIGHT BUT SOME MAY CONTINUE DURING THE NIGHT. MEANWHILE...THE SOUTHWEST ARIZONA DESERTS...AS WELL AS THE EXTREME SOUTHEAST PORTION OF CALIFORNIA ARE EXPECTED TO REMAIN FREE OF ANY THUNDERSTORMS THROUGH TONIGHT. ALTHOUGH THERE IS LESS MOISTURE IN THE MID AND LOWER LEVELS OF THE AIRMASS OVER MOST OF THE OUTLOOK AREA...ENOUGH MOISTURE REMAINS TO GIVE THE ISOLATED THUNDERSTORM THREAT FAR EAST PORTION TONIGHT MAINLY DURING THE EVENING HOURS. STRONGER...POSSIBLY SEVERE EVENING THUNDERSTORMS...WILL BE FOUND OVER THE FAR EASTERN OUTLOOK AREA DUE TO THE PRESENCE OF DEEPER MOISTURE ALONG WITH THE INTERACTION OF AN UPPER LEVEL DISTURBANCE APPROACHING FROM THE SOUTHEAST. .................................................................... THE OUTLOOK AREA INCLUDES THE FOLLOWING COUNTIES... IN ARIZONA IN CALIFORNIA MARICOPA YUMA IMPERIAL SOUTHERN GILA LA PAZ CENTRAL/EASTERN RIVERSIDE NORTHWEST PINAL CRAIG ELLIS
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 29, 9:43 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 62 min |
| Jul 30, 4:58 PM MST | Severe Thunderstorm Warning | PSR | La Paz | 62 min |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.