Alert archive / Arizona / Flash Flood Warnings in 2001

Flash Flood Warning 40, NWS Tucson, AZ

August 19, 2001Pinal County, Arizona

NWS Tucson, AZ issued this flash flood warning at Aug 19, 2001, 4:54 PM MST for Pinal County, Arizona. It was in force for 21 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 19, 2001, 4:54 PM MST (23:54 UTC)
Expired
Aug 19, 2001, 5:15 PM MST
In force
21 min
Issued by
NWS Tucson, AZ
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Pinal County, AZ

The nearest sounding before it

Tuscon, AZ (KTUS), launched 12:00Z, 11.9 hours before the alert went out and 51 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 2001-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 763 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 2001-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 39 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
763 J/kg
Mixed-layer CIN
-182 J/kg
Mixed-layer LCL
1715 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
39 m²/s²
0-3 km storm-relative helicity
93 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 192356
FFWTUS
AZC021-200130-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
454 PM MST SUN AUG 19 2001

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHEASTERN PINAL COUNTY IN ARIZONA

* UNTIL 615 PM MST

* AT 452 PM MST...WEATHER SERVICE DOPPLER RADAR INDICATED AN AREA
  OF VERY HEAVY RAIN 5 TO 10 MILES WEST OF ORACLE...JUST NORTH OF 
  ORACLE JUNCTION...MOVING SLOWLY NORTHWEST.

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 3255 11102 3255 11064 3276 11059 3275 11107

MEYER

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 19, 1:35 PM MSTSevere Thunderstorm WarningTWCSanta Cruz40 min
Aug 19, 2:06 PM MSTSevere Thunderstorm WarningTWCCochise24 min
Aug 19, 3:28 PM MSTSevere Thunderstorm WarningTWCSanta Cruz47 min
Aug 19, 3:55 PM MSTFlash Flood WarningTWCSanta Cruz35 min
Aug 19, 4:28 PM MSTSevere Thunderstorm WarningTWCPinal32 min
Aug 19, 4:32 PM MSTSevere Thunderstorm WarningTWCPima, Santa Cruz28 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.