Alert archive / Arizona / Flash Flood Warnings in 2004

Flash Flood Warning 29, NWS Tucson, AZ

August 6, 2004Pima County, Arizona

NWS Tucson, AZ issued this flash flood warning at Aug 6, 2004, 3:29 PM MST for Pima County, Arizona. It was in force for 2 hr. 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 6, 2004, 3:29 PM MST (22:29 UTC)
Expired
Aug 6, 2004, 5:30 PM MST
In force
2 hr
Issued by
NWS Tucson, AZ
Area
Counties, with a storm outline in the text

County Pima County, AZ

The radar

The Tucson radar (KEMX), 71 km from the middle of the area, began a volume at 22:29 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, 10.5 hours before the alert went out and 72 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 2004-08-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1573 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 2004-08-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 12 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
1573 J/kg
Mixed-layer CIN
-178 J/kg
Mixed-layer LCL
1527 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
12 m²/s²
0-3 km storm-relative helicity
42 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

The text

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

000 
WGUS55 KTWC 062230
FFWTWC
AZC019-070130-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
329 PM MST FRI AUG 6 2004

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTH CENTRAL PIMA COUNTY IN ARIZONA
   THIS INCLUDES THE TOWN OF ARIVACA

* UNTIL 630 PM MST

* AT 321 PM MST...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY
  RAIN OVER ARIVACA...OR ABOUT 26 MILES SOUTHWEST OF GREEN VALLEY...
  MOVING NORTHWEST AT 5 MPH.

SMALL STREAMS...SECONDARY ROADS...AND NORMALLY DRY WASHES WILL FLOOD 
QUICKLY. DO NOT DRIVE INTO FLOODED AREAS. MOVE TO HIGHER GROUND. 
EXPECT SIGINIFICANT FLOODING ALONG ARIVACA ROAD BETWEEN INTERSTATE 
10 AND HIGHWAY 286.

LAT...LON 3154 11117 3175 11116 3175 11152 3154 11155

$$

PYTLAK

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 5, 5:10 PM MSTFlash Flood WarningTWCCochise30 min
Aug 5, 6:50 PM MSTFlash Flood WarningTWCSanta Cruz25 min
Aug 5, 6:56 PM MSTSevere Thunderstorm WarningTWCSanta Cruz49 min
Aug 5, 7:11 PM MSTSevere Thunderstorm WarningTWCCochise34 min
Aug 5, 7:13 PM MSTSevere Thunderstorm WarningTWCCochise, Pima47 min
Aug 6, 4:19 PM MSTSevere Thunderstorm WarningTWCPima41 min
Aug 6, 4:50 PM MSTSevere Thunderstorm WarningTWCPima55 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.