Alert archive / Arizona / Severe Thunderstorm Watches in 1997

Severe Thunderstorm Watch 679

August 8, 19975 counties in Arizona

The Storm Prediction Center issued this severe thunderstorm watch at Aug 8, 1997, 5:15 PM MST for 5 counties in Arizona. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Aug 8, 1997, 5:15 PM MST (00:15 UTC)
Expired
Aug 8, 1997, 10:00 PM MST
In force
5 hr
Issued by
the Storm Prediction Center

Counties Gila County, AZ, Maricopa County, AZ, Pima County, AZ, Pinal County, AZ, Santa Cruz County, AZ

The radar

The Phoenix radar (KIWA), 42 km from the middle of the area, began a volume at 00:19 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.

Warnings issued inside it

16 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Aug 8, 5:18 PM MSTFlash Flood WarningTWCPima57 min
Aug 8, 5:18 PM MSTSevere Thunderstorm WarningTWCPima57 min
Aug 8, 5:22 PM MSTFlash Flood WarningTWCPinal63 min
Aug 8, 5:22 PM MSTSevere Thunderstorm WarningTWCPinal63 min
Aug 8, 5:26 PM MSTSevere Thunderstorm WarningPSRGila34 min
Aug 8, 5:38 PM MSTFlash Flood WarningTWCPinal62 min
Aug 8, 5:38 PM MSTSevere Thunderstorm WarningTWCPinal62 min
Aug 8, 6:14 PM MSTFlash Flood WarningTWCPima61 min
Aug 8, 6:23 PM MSTSevere Thunderstorm WarningTWCPima47 min
Aug 8, 6:27 PM MSTFlash Flood WarningTWCPinal63 min
Aug 8, 6:40 PM MSTSevere Thunderstorm WarningPSRMaricopa, Pinal65 min
Aug 8, 7:19 PM MSTSevere Thunderstorm WarningPSRMaricopa61 min
Aug 8, 7:42 PM MSTSevere Thunderstorm WarningPSRMaricopa78 min
Aug 8, 7:46 PM MSTSevere Thunderstorm WarningPSRPinal44 min
Aug 8, 8:15 PM MSTSevere Thunderstorm WarningPSRMaricopa75 min
Aug 8, 9:00 PM MSTSevere Thunderstorm WarningPSRMaricopa60 min

The nearest sounding before it

Tuscon, AZ (KTUS), launched 00:00Z, 0.3 hours before the alert went out and 173 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 00:00Z on 1997-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 657 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 00:00Z on 1997-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 100 square meters per square second.1939Sfc1 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
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

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

Nearby

Severe Thunderstorm Watches in Arizona, 1997Every severe thunderstorm watch 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.