Alert archive / Arizona / Flash Flood Warnings in 2004

Flash Flood Warning 19, NWS Tucson, AZ

July 23, 2004Pima County, Arizona

NWS Tucson, AZ issued this flash flood warning at Jul 23, 2004, 4:25 PM MST for Pima County, Arizona. It was in force for 65 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 23, 2004, 4:25 PM MST (23:25 UTC)
Expired
Jul 23, 2004, 5:30 PM MST
In force
65 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), 64 km from the middle of the area, began a volume at 23:28 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, 11.4 hours before the alert went out and 26 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 2004-07-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1508 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 2004-07-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 33 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
1508 J/kg
Mixed-layer CIN
-97 J/kg
Mixed-layer LCL
1719 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
33 m²/s²
0-3 km storm-relative helicity
73 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 232331
FFWTWC
AZC019-240130-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
425 PM MST FRI JUL 23 2004

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN PIMA COUNTY IN ARIZONA
    THIS INCLUDES THE CITY OF ORO VALLEY

* UNTIL 630 PM MST

* AT 425 PM MST...AUTOMATED STREAM GAGE AT GOLDER RANCH INDICATED    
  WATER RISE OF 2.5 FEET IN CANADA DEL ORO WASH.  ALTHOUGH RAINFALL
  HAS DIMINISHED ACROSS THE AREA...WATER WILL CONTINUE TO FLOW DOWN  
  THE MOUNTAINS. 

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.

MOST FLASH FLOOD DEATHS OCCUR IN VEHICLES. DO NOT ATTEMPT TO CROSS
FLOWING WATER...EVEN A SMALL ONE...ON FOOT. DO NOT ALLOW CHILDREN TO
PLAY NEAR DITCHES OR STORM DRAINS.

THIS WARNING REPLACES THE PREVIOUSLY ISSUED FLASH FLOOD WARNING FOR
THIS AREA.

LAT...LON 3233 11084 3251 11085 3251 11122 3231 11104

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 23, 11:38 AM MSTFlash Flood WarningTWCSanta Cruz52 min
Jul 23, 12:31 PM MSTFlash Flood WarningTWCPima59 min
Jul 23, 1:13 PM MSTFlash Flood WarningTWCPima, Santa Cruz62 min
Jul 23, 1:35 PM MSTFlash Flood WarningTWCPima, Pinal115 min

Nearby

Flash Flood Warnings in Arizona, 2004Every flash flood warning in 2004

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.