Alert archive / Arizona / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 68, NWS Phoenix, AZ

August 26, 1997Pinal County, Arizona

NWS Phoenix, AZ issued this severe thunderstorm warning at Aug 26, 1997, 1:43 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 26, 1997, 1:43 PM MST (20:43 UTC)
Expired
Aug 26, 1997, 2:45 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 20:47 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 12:00Z, 8.7 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.

Skew-T log-pSkew-T log-p diagram, Tuscon, AZ at 12:00Z on 1997-08-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 718 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tuscon, AZ at 12:00Z on 1997-08-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -27 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
718 J/kg
Mixed-layer CIN
-165 J/kg
Mixed-layer LCL
2056 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
-27 m²/s²
0-3 km storm-relative helicity
-2 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KPHX 262043 RRA
SVRPHX
AZC021-262145-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PHOENIX AZ
143 PM MST TUE AUG 26 1997

*  SEVERE THUNDERSTORM WARNING FOR
   NORTHEASTERN PINAL COUNTY IN CENTRAL ARIZONA

*  UNTIL 245 PM MST

*  SOME LOCATIONS AFFECTED
   SUPERIOR
 
*  AT 143 PM MST RADAR INDICATED A SEVERE THUNDERSTORM
   5 MILES SOUTHWEST OF SUPERIOR.  MOVEMENT WAS TO THE
   NORTH-NORTHEAST AT 15 MPH.

DAMAGING WINDS IN EXCESS OF 57 MPH AND HAIL GREATER THAN OR EQUAL TO
3/4 INCH IN DIAMETER ARE LIKELY WITH THIS STORM.  IN ADDITION...VERY
HEAVY RAINFALL AND INTENSE LIGHTNING CAN BE EXPETED.

The office that day

Everything else NWS Phoenix, AZ issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 26, 8:10 AM MSTSevere Thunderstorm WarningPSRMaricopa45 min
Aug 26, 8:54 AM MSTFlash Flood WarningPSRMaricopa66 min
Aug 26, 8:54 AM MSTSevere Thunderstorm WarningPSRMaricopa66 min
Aug 26, 8:55 AM MSTFlash Flood WarningPSRMaricopa65 min
Aug 26, 8:55 AM MSTSevere Thunderstorm WarningPSRMaricopa65 min
Aug 26, 10:18 AM MSTFlash Flood WarningPSRMaricopa3 hr
Aug 26, 1:37 PM MSTFlash Flood WarningPSRMaricopa2 hr
Aug 26, 4:15 PM MSTSevere Thunderstorm WarningPSRYuma55 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.