Alert archive / Arizona / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 21, NWS Tucson, AZ

July 12, 2002Cochise County, Pima County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Jul 12, 2002, 7:23 PM MST for Cochise County, Pima County, Arizona. It was in force for 27 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 12, 2002, 7:23 PM MST (02:23 UTC)
Expired
Jul 12, 2002, 7:50 PM MST
In force
27 min
Issued by
NWS Tucson, AZ
Area
Counties, with a storm outline in the text

Counties Cochise County, AZ, Pima County, AZ

The radar

The Tucson radar (KEMX), 22 km from the middle of the area, began a volume at 02:26 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 nearest sounding before it

Tuscon, AZ (KTUS), launched 00:00Z, 2.4 hours before the alert went out and 48 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 2002-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 820 joules per kilogram.LCLEL10008507005003002001001 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 2002-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 20 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
820 J/kg
Mixed-layer CIN
-16 J/kg
Mixed-layer LCL
3273 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
20 m²/s²
0-3 km storm-relative helicity
97 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.0

Open this sounding in Storm Lab

The text

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

581 
WUUS55 KTWC 130223
SVRTWC
AZC003-019-130250-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
721 PM MST FRI JUL 12 2002

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EXTREME WEST CENTRAL COCHISE COUNTY IN ARIZONA
  EXTREME EAST CENTRAL PIMA COUNTY IN ARIZONA

* UNTIL 750 PM MST

* AT 711 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  A SEVERE THUNDERSTORM OVER MESCAL...MOVING SLOWLY TO THE SOUTHWEST.

DAMAGING DOWNBURST WINDS...DEADLY LIGHTNING...SMALL HAIL...BLOWING 
DUST AND BRIEF HEAVY RAINS ARE LIKELY. MOTORISTS ON INTERSTATE 10 
BETWEEN VAIL AND BENSON SHOULD USE EXTREME CAUTION WHEN ENCOUNTERING 
THIS STORM. VISIBILITIES IN BLOWING DUST OR HEAVY RAIN WILL REDUCE 
VISIBILITIES QUICKLY BELOW ONE HALF MILE.

LAT...LON 3195 11047 3197 11036 3204 11034 3208 11050

GLUECK

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 12, 5:02 PM MSTSevere Thunderstorm WarningTWCGraham28 min
Jul 12, 6:12 PM MSTSevere Thunderstorm WarningTWCPinal28 min
Jul 12, 6:14 PM MSTSevere Thunderstorm WarningTWCPinal26 min
Jul 12, 7:13 PM MSTSevere Thunderstorm WarningTWCPima32 min
Jul 13, 3:59 PM MSTSevere Thunderstorm WarningTWC46 min
Jul 13, 4:20 PM MSTSevere Thunderstorm WarningTWCPima40 min

Nearby

Severe Thunderstorm Warnings in Arizona, 2002Every severe thunderstorm warning in 2002

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.