Alert archive / Arizona / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 33, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Aug 1, 1997, 6:58 PM MST for Pinal County, Arizona. It was in force for 62 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 1, 1997, 6:58 PM MST (01:58 UTC)
- Expired
- Aug 1, 1997, 8:00 PM MST
- In force
- 62 min
- Issued by
- NWS Phoenix, AZ
- Area
- Whole counties
County Pinal County, AZ
The radar
The Phoenix radar (KIWA), 52 km from the middle of the area, began a volume at 02:01 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, 2.0 hours before the alert went out and 92 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
- 115 J/kg
- Mixed-layer CIN
- -180 J/kg
- Mixed-layer LCL
- 2370 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -26 m²/s²
- 0-3 km storm-relative helicity
- -29 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.
In the hours before
Special weather statement, Aug 1, 2:46 PM MST, 4 hours 12 minutes before
AZZ020>025-CAZ030>033-020130- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE PHOENIX AZ 245 PM MST/PDT THU AUG 1 1997 ...A MODERATE RISK OF SEVERE THUNDERSTORMS OVER NORTHWEST PINAL AND SOUTHERN GILA COUNTIES... ...A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER MARICOPA COUNTY... A SIGNIFICANT INCREASE IN MID AND HIGH LEVEL MOISTURE HAS TAKEN PLACE ACROSS SOUTH CENTRAL AND SOUTHWEST ARIZONA TODAY. THIS MOISTURE INCREASE...COUPLED WITH VERY WARM SURFACE TEMPERATURES...WILL MAKE FOR VERY UNSTABLE ATMOSPHERIC CONDITIONS OVER THE RISK AREA THIS AFTERNOON AND TONIGHT. THE MAIN THREAT OF SEVERE WEATHER FOR SOUTHERN GILA COUNTY AND NORTHWEST PINAL COUNTY WILL BE THIS AFTERNOON AND TONIGHT. THE GREATEST RISK FOR SEVERE WEATHER OVER MARICOPA COUNTY WILL BE LATER TONIGHT...AFTER 7 PM. ANY THUNDERSTORMS THAT FORM OVER THE REST OF THE PHOENIX COUNTY WARNING AREA ARE NOT EXPECTED TO REACH SEVERE LIMITS. THE MAIN SEVERE WEATHER THREAT THIS AFTERNOON AND TONIGHT WILL BE DAMAGING WINDS IN EXCESS OF 57 MPH. HEAVY RAINFALL...FREQUENT DANGEROUS LIGHTNING...HAIL...AND BLOWING DUST MAY ACCOMPANY THE STRONGER STORMS. .................................................................... THE OUTLOOK AREA INCLUDES THE FOLLOWING COUNTIES... IN ARIZONA IN CALIFORNIA MARICOPA YUMA IMPERIAL SOUTHERN GILA LA PAZ CENTRAL/EASTERN RIVERSIDE NORTHWEST PINAL KOCH
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 5:57 PM MST | Severe Thunderstorm Warning | PSR | Pinal | 48 min |
| Aug 2, 4:58 PM MST | Severe Thunderstorm Warning | PSR | Maricopa, Pinal | 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.