Alert archive / Arizona / Flash Flood Warnings in 2001

Flash Flood Warning 2, NWS Tucson, AZ

July 5, 2001Pima County, Arizona

NWS Tucson, AZ issued this flash flood warning at Jul 5, 2001, 11:18 AM MST for Pima County, Arizona. It was in force for 12 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, 11:18 AM MST (18:18 UTC)
Expired: Jul 5, 2001, 11:30 AM MST
In force: 12 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, 6.3 hours before the alert went out and 55 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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 051819
FFWTWC
AZC019-051930-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
1118 AM MST THU JUL 5 2001

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

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

* UNTIL 1230 PM MST

* AT 1110 AM MST...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY
  RAIN OVER CENTRAL PIMA COUNTY...OR ABOUT 10 MILES SOUTH OF THREE
  POINT...MOVING NORTHWEST AT 15 TO 20 MPH.

DOPPLER RADAR SHOWED A VERY STRONG STORM WITH VERY HEAVY RAIN OVER
HIGHWAY 286 ABOUT 10 MILES SOUTH OF THREE POINT. ADDITIONAL STORMS
FORMING OFF THE SIERRITA MOUNTAINS WILL MOVE OVER THE AREA AND ARE
CAPABLE OF PRODUCING VERY HEAVY RAIN. RAINFALL TOTALS OF ONE TO TWO
INCHES OF RAIN IS POSSIBLE IN THIS AREA. WASHES THAT MAY OVERFLOW
WILL BE ALTAR WASH...FRESNAL WASH AND BOLA BLANCAS WASH.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...NORMALLY DRY WASHES AND
ARROYOS...AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

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 3196 11155 3182 11138 3193 11123 3207 11142

GLUECK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 5, 9:55 AM MST	Flash Flood Warning	TWC	Pima	20 min
Jul 5, 11:45 AM MST	Flash Flood Warning	TWC	Pima	30 min
Jul 5, 12:10 PM MST	Severe Thunderstorm Warning	TWC	Pima	35 min
Jul 5, 12:35 PM MST	Flash Flood Warning	TWC	Pima
Jul 5, 1:55 PM MST	Flash Flood Warning	TWC	Cochise	35 min
Jul 5, 1:55 PM MST	Severe Thunderstorm Warning	TWC	Pinal	65 min

Nearby

Flash Flood Warnings in Arizona, 2001 Every 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.