Alert archive / Arizona / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 21, NWS Tucson, AZ

August 20, 1994Pima County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Aug 20, 1994, 6:25 PM MST for Pima County, Arizona. It was in force for 32 min.

The area

The counties it named.

The facts

Issued
Aug 20, 1994, 6:25 PM MST (01:25 UTC)
Expired
Aug 20, 1994, 6:57 PM MST
In force
32 min
Issued by
NWS Tucson, AZ
Area
Whole counties

County Pima County, AZ

The nearest sounding before it

Tuscon, AZ (KTUS), launched 00:00Z, 1.4 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 00:00Z on 1994-08-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 872 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 1994-08-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 24 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
872 J/kg
Mixed-layer CIN
-58 J/kg
Mixed-layer LCL
2486 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
24 m²/s²
0-3 km storm-relative helicity
34 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 KTUS 210126 RRA
SVRTUS
AZC019-210230-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TUCSON ARIZONA
625 PM MST SAT AUG 20 1994
 
THE NATIONAL WEATHER SERVICE IN TUCSON ARIZONA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  730 PM MST
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTH CENTRAL ARIZONA
 
   ...EASTERN PIMA COUNTY
 
AT 620 PM MST NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM WAS LOCATED 5 MILES SOUTHWEST OF ROBLES JUNCTION IN
EASTERN PIMA COUNTY. THIS STORM WAS MOVING TO THE EAST-NORTHEAST
AT ABOUT 10 MPH.  IT WILL AFFECT ROBLES JUNCTION, RYAN FIELD, AND
AREAS WEST OF THE TUCSON MOUNTAINS DURING THE NEXT HOUR OR TWO.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SpO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
 
WEBER

Nearby

Severe Thunderstorm Warnings in Arizona, 1994Every severe thunderstorm warning in 1994

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.