Alert archive / Arizona / Flash Flood Warnings in 2003

Flash Flood Warning 1, NWS Tucson, AZ

July 11, 2003Pima County, Arizona

NWS Tucson, AZ issued this flash flood warning at Jul 11, 2003, 7:50 PM MST for Pima County, Arizona. It was in force for 40 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 11, 2003, 7:50 PM MST (02:50 UTC)
Expired
Jul 11, 2003, 8:30 PM MST
In force
40 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), 58 km from the middle of the area, began a volume at 02:50 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, 2.8 hours before the alert went out and 37 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 2003-07-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 868 joules per kilogram.LCLEL10008507005003002001001 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 2003-07-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -26 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
868 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
3379 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
-26 m²/s²
0-3 km storm-relative helicity
-17 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 120251
FFWTWC
AZC019-120430-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
750 PM MST FRI JUL 11 2003

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EXTREME NORTHEASTERN PIMA COUNTY IN ARIZONA
    INCLUDING THE ASPEN FIRE BURN AREA IN THE CATALINA MOUNTAINS

* UNTIL 930 PM MST

* AT 740 PM MST...WEATHER SERVICE DOPPLER RADAR INDICATED A          
  THUNDERSTORM WITH HEAVY RAIN 10 MILES EAST OF MOUNT LEMMON...OR   
  ABOUT 25 MILES NORTHEAST OF TUCSON...MOVING WEST AT 10 MPH.

* THE THUNDERSTORM WITH EXCESSIVE RAINFALL WILL BE NEAR...
   MOUNT LEMMON/SUMMERHAVEN AT 815 PM MST

ALTHOUGH ONLY AN INCH OF RAIN IS EXPECTED WITH THIS STORM...THE BURN 
AREA IS EXTREMELY SUSCEPTIBLE TO FLASH FLOODING AND MUDSLIDES. STAY 
AWAY FROM CANYONS...ESPECIALLY SABINO CANYON.

LAT...LON 3234 11050 3251 11050 3252 11083 3235 11083

PYTLAK

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 11, 5:44 PM MSTSevere Thunderstorm WarningTWCPima31 min
Jul 11, 6:12 PM MSTSevere Thunderstorm WarningTWCPima48 min

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.