Alert archive / Arizona / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 63, NWS Tucson, AZ

August 28, 2002Pima County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Aug 28, 2002, 4:04 PM MST for Pima County, Arizona. It was in force for 41 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 28, 2002, 4:04 PM MST (23:04 UTC)
Expired
Aug 28, 2002, 4:45 PM MST
In force
41 min
Issued by
NWS Tucson, AZ
Area
Whole counties

County Pima County, AZ

The radar

The Tucson radar (KEMX), 112 km from the middle of the area, began a volume at 23:06 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, 11.1 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 2002-08-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3633 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 2002-08-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 75 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
3633 J/kg
Mixed-layer CIN
-104 J/kg
Mixed-layer LCL
1518 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
75 m²/s²
0-3 km storm-relative helicity
68 m²/s²
Significant tornado parameter
0.0
Supercell composite
7.0

Open this sounding in Storm Lab

The text

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

801 
WUUS55 KTWC 282304
SVRTWC
AZC019-282345-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
403 PM MST WED AUG 28 2002

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN PIMA COUNTY IN ARIZONA
    THIS INCLUDES THE CITIES OF...TUCSON...ORO VALLEY...GREEN VALLEY

* UNTIL 445 PM MST

* AT 351 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  SEVERE THUNDERSTORMS 6 MILES WEST OF ORO VALLEY...OVER THE CATALINA 
  FOOTHILLS AND 26 MILES EAST OF GREEN VALLEY...MOVING NORTHEAST
  AT 15 MPH.

THIS WARNING IS A CONTINUATION OF THE PREVIOUS WARNING FOR EASTERN 
PIMA COUNTY.  

GO INSIDE A STRONG BUILDING. DAMAGING WINDS...DEADLY LIGHTNING...AND
HEAVY RAINS ARE LIKELY.  LARGE HAIL IS LIKELY. PUT YOUR VEHICLE IN 
A GARAGE OR CARPORT AND MOVE TO A STURDY SHELTER.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 28, 1:48 PM MSTSevere Thunderstorm WarningTWCPima42 min
Aug 28, 2:09 PM MSTSevere Thunderstorm WarningTWCCochise51 min
Aug 28, 2:31 PM MSTSevere Thunderstorm WarningTWCPima29 min
Aug 28, 2:35 PM MSTSevere Thunderstorm WarningTWCPinal25 min
Aug 28, 3:12 PM MSTSevere Thunderstorm WarningTWCPima, Pinal48 min
Aug 28, 4:54 PM MSTFlash Flood WarningTWCPima3 hr
Aug 28, 4:55 PM MSTFlash Flood WarningTWCPima110 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.