Alert archive / Arizona / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 37, NWS Tucson, AZ

July 21, 2002Greenlee County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Jul 21, 2002, 2:12 PM MST for Greenlee County, Arizona. It was in force for 63 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 21, 2002, 2:12 PM MST (21:12 UTC)
Expired
Jul 21, 2002, 3:15 PM MST
In force
63 min
Issued by
NWS Tucson, AZ
Area
Counties, with a storm outline in the text

County Greenlee County, AZ

The radar

The Tucson radar (KEMX), 190 km from the middle of the area, began a volume at 21:11 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 12:00Z, 9.2 hours before the alert went out and 189 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 2002-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 453 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 2002-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 81 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
453 J/kg
Mixed-layer CIN
-120 J/kg
Mixed-layer LCL
1758 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
81 m²/s²
0-3 km storm-relative helicity
139 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

782 
WUUS55 KTWC 212112
SVRTWC
AZC011-212215-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
212 PM MST SUN JUL 21 2002

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  GREENLEE COUNTY IN ARIZONA

* UNTIL 315 PM MST

* AT 210 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 15 MILES NORTHEAST OF CLIFTON...OR ABOUT 42
  MILES NORTHEAST OF SAFFORD...MOVING SOUTHWEST AT 15 MPH.

DAMAGING WINDS...DEADLY LIGHTNING...AND HEAVY RAINS ARE LIKELY. DO NOT 
DRIVE INTO ANY FLOODED AREAS.

LAT...LON 3312 10944 3276 10916 3268 10907 3364 10908
          3362 10937

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 21, 1:54 PM MSTFlash Flood WarningTWCCochise51 min
Jul 21, 1:55 PM MSTFlash Flood WarningTWCCochise110 min
Jul 21, 3:16 PM MSTSevere Thunderstorm WarningTWCGraham, Greenlee29 min
Jul 21, 4:38 PM MSTSevere Thunderstorm WarningTWCCochise37 min
Jul 21, 4:41 PM MSTSevere Thunderstorm WarningTWCCochise34 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.