Alert archive / Arizona / Flash Flood Warnings in 2003

Flash Flood Warning 29, NWS Tucson, AZ

July 31, 2003Pima County, Arizona

NWS Tucson, AZ issued this flash flood warning at Jul 31, 2003, 6:50 PM MST for Pima County, Arizona. It was in force for . 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 31, 2003, 6:50 PM MST (01:50 UTC)
Expired
Jul 31, 2003, 6:45 PM MST
In force
Issued by
NWS Tucson, AZ
Area
Counties, with a storm outline in the text

County Pima County, AZ

The radar

The Tucson radar (KEMX), 95 km from the middle of the area, began a volume at 01:52 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, 1.8 hours before the alert went out and 91 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 2003-08-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 472 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 00:00Z on 2003-08-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -23 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
472 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
2099 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
-23 m²/s²
0-3 km storm-relative helicity
119 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

000 
WGUS55 KTWC 010153
FFWTWC
AZC019-010245-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
650 PM MST THU JUL 31 2003

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EXTREME SOUTH CENTRAL PIMA COUNTY IN ARIZONA

* UNTIL 745 PM MST

* AT 647 PM MST...WEATHER SERVICE DOPPLER RADAR INDICATED A          
  THUNDERSTORM PRODUCING VERY HEAVY RAIN 2 MILES NORTH OF            
  SASABE...OR ABOUT 33 MILES SOUTHEAST OF SELLS. THIS                
  THUNDERSTORM WAS SHOWING VERY LITTLE MOVEMENT.

* THE THUNDERSTORM WITH EXCESSIVE RAINFALL WILL BE NEAR...
   JUNCTION OF HIGHWAY 286 AND ARIVACA ROAD AT 715 PM MST

MOST FLASH FLOOD DEATHS OCCUR IN VEHICLES. NEVER DRIVE INTO A 
FLOODED AREA. THE ROAD AHEAD MAY BE UNDERMINED OR WASHED AWAY. 
ABANDON VEHICLES CAUGHT IN RISING WATER IMMEDIATELY. 

LAT...LON 3153 11167 3145 11141 3170 11144 3166 11163

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 31, 6:30 PM MSTSevere Thunderstorm WarningTWCPima30 min
Aug 1, 4:35 PM MSTFlash Flood WarningTWCPima3 hr

Nearby

Flash Flood Warnings in Arizona, 2003Every flash flood warning in 2003

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.