Alert archive / Arizona / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 13, NWS Tucson, AZ

August 19, 1993Pima County, Santa Cruz County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Aug 19, 1993, 1:40 PM MST for Pima County, Santa Cruz County, Arizona. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
Aug 19, 1993, 1:40 PM MST (20:40 UTC)
Expired
Aug 19, 1993, 3:45 PM MST
In force
2 hr
Issued by
NWS Tucson, AZ
Area
Whole counties

Counties Pima County, AZ, Santa Cruz County, AZ

The nearest sounding before it

Tuscon, AZ (KTUS), launched 12:00Z, 8.7 hours before the alert went out and 56 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 1993-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 97 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 1993-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 89 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
97 J/kg
Mixed-layer CIN
-162 J/kg
Mixed-layer LCL
1706 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
89 m²/s²
0-3 km storm-relative helicity
98 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.

In the hours before

Special weather statement, Aug 19, 12:10 PM MST, 1 hour 30 minutes before
AZC003-019-023-192115-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON ARIZONA
1210 PM MST THU AUG 19 1993

...THUNDERSTORMS IN SOUTHEAST ARIZONA...

AT 1205 PM MST WEATHER RADAR SHOWED THUNDERSTORMS OCCURRING AND
DEVELOPING THROUGHOUT SANTA CRUZ, COCHISE, AND EASTERN PIMA COUNTIES.
THE STRONGEST STORMS APPEARED TO BE IN CENTRAL SANTA CRUZ COUNTY...
WITH ANOTHER AREA OF STRONG STORMS DEVELOPING APPROXIMATELY 35 MILES
WEST OF TUCSON.  AT 1210 PM CLOUDS WERE ALSO OBSERVED TO BE BUILDING
IN AND AROUND THE TUCSON AREA.  MOST CELLS WERE MOVING TO THE NORTH
AT 5 TO 10 MPH.

EXPECT DEVELOPMENT TO CONTINUE THROUGHOUT SOUTHEAST ARIZONA THE REST OF
THE AFTERNOON AND EARLY EVENING.  SOME OF THESE STORMS WILL PRODUCE
HEAVY RAIN...STRONG GUSTY WINDS...FREQUENT LIGHTNING...AND SMALL HAIL.
THUNDERSTORM DEVELOPMENT SEEMS MORE WIDESPREAD AND IS BEGINNING EARLIER
TODAY THAN IN RECENT DAYS.  ALL PERSONS IN SOUTHEAST ARIZONA SHOULD BE
ALERT TO WHAT CAN BE A RAPIDLY CHANGING WEATHER SITUATION.  FURTHER
STATEMENTS OR WARNINGS WILL BE ISSUED AS NECESSARY.

MEYER
Special weather statement, Aug 19, 12:13 PM MST, 1 hour 27 minutes before
AZC003-019-023-192115-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON ARIZONA
1210 PM MST THU AUG 19 1993

...THUNDERSTORMS IN SOUTHEAST ARIZONA...

AT 1205 PM MST WEATHER RADAR SHOWED THUNDERSTORMS OCCURRING AND
DEVELOPING THROUGHOUT SANTA CRUZ, COCHISE, AND EASTERN PIMA COUNTIES.
THE STRONGEST STORMS APPEARED TO BE IN CENTRAL SANTA CRUZ COUNTY...
WITH ANOTHER AREA OF STRONG STORMS DEVELOPING APPROXIMATELY 35 MILES
WEST OF TUCSON.  AT 1210 PM CLOUDS WERE ALSO OBSERVED TO BE BUILDING
IN AND AROUND THE TUCSON AREA.  MOST CELLS WERE MOVING TO THE NORTH
AT 5 TO 10 MPH.

EXPECT DEVELOPMENT TO CONTINUE THROUGHOUT SOUTHEAST ARIZONA THE REST OF
THE AFTERNOON AND EARLY EVENING.  SOME OF THESE STORMS WILL PRODUCE
HEAVY RAIN...STRONG GUSTY WINDS...FREQUENT LIGHTNING...AND SMALL HAIL.
THUNDERSTORM DEVELOPMENT SEEMS MORE WIDESPREAD AND IS BEGINNING EARLIER
TODAY THAN IN RECENT DAYS.  ALL PERSONS IN SOUTHEAST ARIZONA SHOULD BE
AL>ERT TO WHAT CAN BE A RAPIDLY CHANGING WEATHER SITUATION.  FURTHER
STATEMENTS OR WARNINGS WILL BE ISSUED AS NECESSARY.

MEYER

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 19, 1:40 PM MSTFlash Flood WarningTWCPima, Santa Cruz2 hr
Aug 19, 3:00 PM MSTFlash Flood WarningTWCCochise, Pima, Santa Cruz2 hr
Aug 19, 3:00 PM MSTSevere Thunderstorm WarningTWCCochise, Pima, Santa Cruz2 hr

Nearby

Severe Thunderstorm Warnings in Arizona, 1993Every severe thunderstorm warning in 1993

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.