Alert archive / Arizona / Flash Flood Warnings in 2002

Flash Flood Warning 80, NWS Tucson, AZ

August 29, 2002Pima County, Arizona

NWS Tucson, AZ issued this flash flood warning at Aug 29, 2002, 1:15 PM MST for Pima County, Arizona. It was in force for 60 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
Aug 29, 2002, 1:15 PM MST (20:15 UTC)
Expired
Aug 29, 2002, 2:15 PM MST
In force
60 min
Issued by
NWS Tucson, AZ
Area
Counties, with a storm outline in the text

County Pima County, AZ

The nearest sounding before it

Tuscon, AZ (KTUS), launched 12:00Z, 8.3 hours before the alert went out and 17 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 2002-08-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 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 2002-08-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 13 square meters per square second.1939Sfc1 km3 km6 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2152 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
13 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 
WGUS55 KTWC 292016
FFWTWC
AZC019-292215-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
115 PM MST THU AUG 29 2002

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAST CENTRAL PIMA COUNTY IN ARIZONA
    THIS INCLUDES THE CITIES OF...TUCSON...GREEN VALLEY

* UNTIL 315 PM MST

* AT 106 PM MST...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY
  RAIN 9 MILES NORTHWEST OF SAHUARITA...OR ABOUT 12 MILES SOUTH OF
  TUCSON...MOVING EAST AT 10 MPH.

STREETS...UNDERPASSES AND NORMALLY DRY WASHES WILL FLOOD QUICKLY. DO
NOT DRIVE INTO FLOODED AREAS OF AROUND BARRICADES. IF THE ROAD AHEAD
IS BLOCKED...TURN AROUND AND TAKE ANOTHER ROUTE.

LAT...LON 3228 11136 3195 11131 3179 11115 3180 11051
          3229 11050

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 29, 5:17 AM MSTSevere Thunderstorm WarningTWCPinal43 min
Aug 29, 12:50 PM MSTSevere Thunderstorm WarningTWCPima55 min
Aug 29, 1:16 PM MSTFlash Flood WarningTWCPima119 min

Nearby

Flash Flood Warnings in Arizona, 2002Every flash flood 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.