Alert archive / Arizona / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 50, NWS Phoenix, AZ

August 8, 1997Gila County, Arizona

NWS Phoenix, AZ issued this severe thunderstorm warning at Aug 8, 1997, 5:26 PM MST for Gila County, Arizona. It was in force for 34 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 8, 1997, 5:26 PM MST (00:26 UTC)
Expired: Aug 8, 1997, 6:00 PM MST
In force: 34 min
Issued by: NWS Phoenix, AZ
Area: Whole counties

County Gila County, AZ

The radar

The Flagstaff radar (KFSX), 93 km from the middle of the area, began a volume at 00:27 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 8, 5:15 PM MST	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Tuscon, AZ (KTUS), launched 00:00Z, 0.4 hours before the alert went out and 181 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 657 J/kg
Mixed-layer CIN: -196 J/kg
Mixed-layer LCL: 1881 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 100 m²/s²
0-3 km storm-relative helicity: 196 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KPHX 090026 RRA
SVRPHX
AZC007-090100-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PHOENIX AZ
526 PM MST FRI AUG 8 1997

*  SEVERE THUNDERSTORM WARNING FOR
   SOUTHEASTERN GILA COUNTY IN CENTRAL ARIZONA

*  UNTIL 600 PM MST

*  SOME LOCATIONS AFFECTED
   SAN CARLOS
   GLOBE
   CUTTER
   ALONG U.S. HIGHWAY 70 BETWEEN PERIDOT AND GLOBE
 
*  AT 526 MST RADAR INDICATED A SEVERE THUNDERSTORM OVER SAN CARLOS
   AND OVER GLOBE. MOVEMENT WAS TO THE SOUTHWEST AT 10 TO 15 MPH.

DAMAGING WINDS IN EXCESS OF 57 MPH AND HAIL GREATER THAN 3/4 INCH
IN DIAMETER ARE LIKELY WITH THIS STORM.

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 8, 5:03 PM MST	Severe Thunderstorm Warning	PSR	Gila	62 min
Aug 8, 6:40 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	65 min
Aug 8, 7:19 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	61 min
Aug 8, 7:42 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	78 min
Aug 8, 7:46 PM MST	Severe Thunderstorm Warning	PSR	Pinal	44 min
Aug 8, 8:15 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	75 min
Aug 8, 9:00 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	60 min
Aug 8, 9:31 PM MST	Severe Thunderstorm Warning	PSR	La Paz	54 min

Nearby

Severe Thunderstorm Warnings in Arizona, 1997 Every 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.