Alert archive / Arizona / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 90, NWS Tucson, AZ

August 21, 1996Pima County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Aug 21, 1996, 2:30 PM MST for Pima 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
Aug 21, 1996, 2:30 PM MST (21:30 UTC)
Expired
Aug 21, 1996, 3:30 PM MST
In force
60 min
Issued by
NWS Tucson, AZ
Area
Whole counties

County Pima County, AZ

The nearest sounding before it

Tuscon, AZ (KTUS), launched 12:00Z, 9.5 hours before the alert went out and 84 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 1996-08-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 707 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 1996-08-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -36 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
707 J/kg
Mixed-layer CIN
-148 J/kg
Mixed-layer LCL
2032 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
-36 m²/s²
0-3 km storm-relative helicity
-23 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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.

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.

NWS Tucson, AZ wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 21, 9:27 AM MST, 5 hours 3 minutes earlier.

Area forecast discussion, Aug 21, 9:27 AM MST, 5 hours 3 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TUCSON AZ
930 AM MST WED AUG 21 1996

MOIST AND UNSTABLE AMS CONTINUES ACORSS SE AZ WITH BEST MOISTURE
OVER THE ERN ZONES. AMS WILL REMIAN MOIST AS AIRFLOW REMAINS FROM
THE SOUTH. CURRENT FORECASTS OF WDLY SCT TSTMS WRN ZONES TO SCT
TSTMS ERN ZONES LOOK GOOD. NO UPDATES PLANNED. TUS 222. COLLINS

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 20, 6:04 PM MSTSevere Thunderstorm WarningTWCGraham26 min
Aug 21, 1:45 PM MSTFlash Flood WarningTWCCochise, Graham60 min
Aug 21, 1:45 PM MSTSevere Thunderstorm WarningTWCCochise, Graham60 min
Aug 21, 2:30 PM MSTFlash Flood WarningTWCPima60 min
Aug 21, 2:43 PM MSTFlash Flood WarningTWCCochise62 min
Aug 21, 2:43 PM MSTSevere Thunderstorm WarningTWCCochise62 min
Aug 21, 3:58 PM MSTFlash Flood WarningTWCPinal62 min
Aug 21, 3:58 PM MSTSevere Thunderstorm WarningTWCPinal62 min

Nearby

Severe Thunderstorm Warnings in Arizona, 1996Every severe thunderstorm warning in 1996

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.