Alert archive / Arizona / Flash Flood Warnings in 1990
Flash Flood Warning 10, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Aug 3, 1990, 7:25 PM MST for Pima County, Arizona. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Aug 3, 1990, 7:25 PM MST (02:25 UTC)
- Expired
- Aug 3, 1990, 9:30 PM MST
- In force
- 2 hr
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties
County Pima County, AZ
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Tuscon, AZ (KTUS), launched 00:00Z, 2.4 hours before the alert went out and 84 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.
- Mixed-layer CAPE
- 674 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 2215 m above ground
- 0-6 km bulk shear
- 3 kt
- 0-1 km storm-relative helicity
- -40 m²/s²
- 0-3 km storm-relative helicity
- -9 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KTUS 040225
FFWTUS
AZC019-040430-
BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
725 PM MST FRI AUG 3 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 930 PM MST FOR PEOPLE IN THE FOLLOWING COUNTY
IN THE SOUTH CENTRAL PART OF ARIZONA
EXTREME EASTERN PIMA
AT 715 PM TUCSON AND PHOENIX RADAR INDICATED STRONG THUNDERSTORMS
ALONG A LINE FROM GREEN VALLEY NORTH NORTHWEST TO JUST SOUTH OF
GLOBE. THESE STORMS ARE MOVING SLOWLY SOUTHWEST AND WILL LIKELY
AFFECT THE TUCSON METRO AREA INCLUDING GREEN VALLEY AND MARANA
OVER THE NEXT COUPLE OF HOURS.
STAY OUT OF WASHES AND LOW LYING AREAS. FLASH FLOODS CAN OCCUR
WITH LITTLE OR NO ADVANCE WARNING.
DO NOT ATTEMPT TO DRIVE OVER ROADS COVERED BY FLOOD WATERS OR
ACROSS FLOODED HIGHWAY DIPS.What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Aug 3, 1:48 PM MST, 5 hours 37 minutes before
AZZ007-009-010-032330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 140 PM MST FRI AUG 3 1990 TUCSON WEATHER RADAR INDICATES NUMEROUS THUNDERSTORMS BUILDING AND OCCURING THROUGHOUT MOST OF PIMA AND SANTA CRUZ COUNTIES AND CENTRAL AND SOUTHERN COCHISE COUNTY. A FEW OF THESE STORMS MAY BE HEAVY WITH STRONG GUSTY WINDS. THERE IS LITTLE OR NO MOVEMENT TO THESE STORMS SO UP TO 1 TO 2 INCHES OF RAINFALL MAY OCCUR IN SOME AREAS WITH POeSSIBLE LOCAL FLOODING. PERSONS IN THE AFFECTED AREA SHOULD USE CAUTION WHILE IN THE VICINITY OF THESE STORMS...AND BE ALERT TO DANGEROUS CLOUD TO GROUND LIGHTNING... RAPID WATER RISES IN FLOOD PRONE AREAS...AND STRONG WINDS. MAZUR NWS TUS
Special weather statement, Aug 3, 5:16 PM MST, 2 hours 9 minutes before
AZZ007-009-010-040200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 515 PM MST FRI AUG 3 1990 TUCSON WEATHER RADAR INDICATES STRONG THUNDERSTORMS BUILDING AND OCCURING THROUGHOUT MOST OF PIMA AND SANTA CRUZ COUNTIES AND CENTRAL AND WESTERN COCHISE COUNTY. THE LARGEST STORMS ARE LOCATED OVER BENSON AND WEST OF TUCSON...ALSO THERE IS A LINE OF THUNDERSTORMS BUILDING TO THE NORTHWEST OF TUCSON...EXTENDING FROM TOMBSTONE TO CENTRAL PINAL COUNTY. THESE STORMS ARE MOVING SLOWLY TO THE SOUTHWEST AND COULD EFFECT THE TUCSON METROPOLITAN AREA IN THE NEXT FEW HOURS. PERSONS IN THE AFFECTED AREA SHOULD USE CAUTION WHILE IN THE VICINITY OF THESE STORMS...AND BE ALERT TO DANGEROUS CLZOUD TO GROUND LIGHTNING... RAPID WATER RISES IN FLOOD PRONE AREAS...AND STRONG WINDS. ROBINSON NWS TUS
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 7:56 PM MST | Severe Thunderstorm Warning | TWC | Pima | 94 min |
Nearby
Flash Flood Warnings in Arizona, 1990Every flash flood warning in 1990
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.