Alert archive / Arizona / Flash Flood Warnings in 2001

Flash Flood Warning 1, NWS Tucson, AZ

July 5, 2001Pima County, Arizona

NWS Tucson, AZ issued this flash flood warning at Jul 5, 2001, 9:55 AM MST for Pima County, Arizona. It was in force for 20 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
Jul 5, 2001, 9:55 AM MST (16:55 UTC)
Expired
Jul 5, 2001, 10:15 AM MST
In force
20 min
Issued by
NWS Tucson, AZ
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Pima County, AZ

The nearest sounding before it

Tuscon, AZ (KTUS), launched 12:00Z, 4.9 hours before the alert went out and 108 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 2001-07-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1608 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 2001-07-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 40 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
1608 J/kg
Mixed-layer CIN
-105 J/kg
Mixed-layer LCL
1266 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
40 m²/s²
0-3 km storm-relative helicity
166 m²/s²
Significant tornado parameter
0.4
Supercell composite
1.5

Open this sounding in Storm Lab

The text

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

000 
WGUS55 KTWC 051655
FFWTWC
AZC019-051815-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
955 AM MST THU JUL 5 2001

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  PORTIONS OF SOUTHWEST PIMA COUNTY IN ARIZONA

* UNTIL 1115 AM MST

* AT 950 AM MST...WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS
WITH VERY HEAVY RAIN FROM SELLS SOUTHWEST TO THE MEXICAN BORDER.
OVERNIGHT RAINFALL NEAR THE MEXICAN BORDER AMOUNTED TO OVER 3
INCHES. THUNDERSTORMS IN THE AREA FROM SELLS TO THE MEXICAN BORDER
WILL CAUSE WASHES TO FLOOD.

* THE THUNDERSTORM WITH EXCESSIVE RAINFALL WILL BE FROM SELLS
TO THE MEXICAN BORDER UNTIL 1045 AM.

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 3152 11159 3181 11143 3210 11244 3185 11265

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 5, 11:18 AM MSTFlash Flood WarningTWCPima12 min
Jul 5, 11:45 AM MSTFlash Flood WarningTWCPima30 min
Jul 5, 12:10 PM MSTSevere Thunderstorm WarningTWCPima35 min
Jul 5, 12:35 PM MSTFlash Flood WarningTWCPima
Jul 5, 1:55 PM MSTFlash Flood WarningTWCCochise35 min
Jul 5, 1:55 PM MSTSevere Thunderstorm WarningTWCPinal65 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.