Alert archive / Arizona / Flash Flood Warnings in 2002

Flash Flood Warning 73, NWS Tucson, AZ

August 9, 2002Pima County, Arizona

NWS Tucson, AZ issued this flash flood warning at Aug 9, 2002, 4:56 PM MST for Pima County, Arizona. It was in force for 34 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 9, 2002, 4:56 PM MST (23:56 UTC)
Expired
Aug 9, 2002, 5:30 PM MST
In force
34 min
Issued by
NWS Tucson, AZ
Area
Counties, with a storm outline in the text

County Pima County, AZ

The radar

The Tucson radar (KEMX), 45 km from the middle of the area, began a volume at 23:56 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, 11.9 hours before the alert went out and 14 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 2002-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 196 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 2002-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 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
196 J/kg
Mixed-layer CIN
-196 J/kg
Mixed-layer LCL
2389 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
17 m²/s²
0-3 km storm-relative helicity
47 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 092358
FFWTWC
AZC019-100130-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
456 PM MST FRI AUG 9 2002

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN PIMA COUNTY IN ARIZONA
    THIS INCLUDES THE CITY OF TUCSON

* UNTIL 630 PM MST

* AT 455 PM MST...SEVERE WEATHER SPOTTER REPORTED VERY HEAVY RAIN AT 
  CATALINA HIGHWAY AND HOUGHTON ROAD...MOVING WEST AT 10 MPH.

* THE THUNDERSTORM WITH EXCESSIVE RAINFALL WILL BE NEAR...
   TUCSON AT 530 PM MST

LAT...LON 3232 11064 3240 11083 3225 11106 3208 11087

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 9, 3:05 PM MSTSevere Thunderstorm WarningTWCPima25 min
Aug 9, 4:30 PM MSTFlash Flood WarningTWCGraham
Aug 9, 4:31 PM MSTFlash Flood WarningTWCGraham59 min
Aug 9, 4:49 PM MSTSevere Thunderstorm WarningTWCPima26 min
Aug 9, 4:58 PM MSTFlash Flood WarningTWCPima92 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; radar from the NEXRAD Level II archive.