Alert archive / Arizona / Flash Flood Warnings in 2001

Flash Flood Warning 24, NWS Tucson, AZ

August 3, 2001Pima County, Arizona

NWS Tucson, AZ issued this flash flood warning at Aug 3, 2001, 4:15 PM MST for Pima County, Arizona. It was in force for 15 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued
Aug 3, 2001, 4:15 PM MST (23:15 UTC)
Expired
Aug 3, 2001, 4:30 PM MST
In force
15 min
Issued by
NWS Tucson, AZ
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Pima County, AZ

The radar

The Tucson radar (KEMX), 87 km from the middle of the area, began a volume at 23:10 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, 11.3 hours before the alert went out and 48 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 2001-08-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 610 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 2001-08-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 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
610 J/kg
Mixed-layer CIN
-138 J/kg
Mixed-layer LCL
1869 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
59 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 032319
FFWTUS

AZC019-040030-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
415 PM MST FRI AUG 3 2001

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTH CENTRAL PIMA COUNTY IN ARIZONA

* UNTIL 530 PM MST

* AT 410 PM MST...WEATHER SERVICE DOPPLER RADAR INDICATED VERY 
  HEAVY RAIN OVER PICTURE ROCKS AREA...MOVING NORTHEAST AT 15 MPH.

DOPPLER RADAR IS INDICATING THAT OVER TWO INCHES OF RAIN HAD FALLEN 
IN AND AROUND THE PICTURE ROCKS AREA. FLOODING OF WASHES AND STREETS 
IS LIKELY ESPECIALLY ALONG SANDARIO ROAD. THE HEAVY RAINFALL IS 
MOVING TOWARD AVRA VALLEY AIR PARK AND MAY CAUSE FLOODING IN THIS 
AREA ALSO.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. 
DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN 
DEPTH BY FOOT OR BY AUTOMOBILE.

LAT...LON 3231 11139 3234 11118 3251 11129 3251 11141

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 2, 5:55 PM MSTFlash Flood WarningTWCCochise65 min
Aug 2, 10:00 PM MSTSevere Thunderstorm WarningTWCPinal30 min
Aug 3, 3:04 PM MSTSevere Thunderstorm WarningTWCPima71 min

Nearby

Flash Flood Warnings in Arizona, 2001Every flash flood warning in 2001

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.