Alert archive / Arizona / Flash Flood Warnings in 1990
Flash Flood Warning 15, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Aug 30, 1990, 5:41 PM MST for Pima County, Arizona. It was in force for 64 min.
The area
The counties it named.
The facts
- Issued
- Aug 30, 1990, 5:41 PM MST (00:41 UTC)
- Expired
- Aug 30, 1990, 6:45 PM MST
- In force
- 64 min
- 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, 0.7 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
- 724 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 2628 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 41 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KTUS 310042 FFWTUS AZC019-310145- BULLETIN - EBS ACTIVATION REQUESTED SEVERE THUNDERSTORM AND FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TUCSON ARIZONA 541 PM MST THU AUG 30 1990 THE NATIONAL WEATHER SERVICE IN TUCSON ARIZONA HAS ISSUED A SEVERE THUNDERSTORM AND FLASH FLOOD WARNING EFFECTIVE UNTIL 645 PM MST FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTH CENTRAL ARIZONA ...EASTERN PIMA COUNTY A SEVERE THUNDERSTORM WITH WINDS IN EXCESS OF 50 KNOTS AND 1/4 INCH HAIL MOVED INTO THE TUCSON METROPOLITAN AREA SHORTLY AFTER 5 PM. THE AIRPORT RECORDED 51 MPH WIND GUST AT 510 PM AND HEAVY RAIN WITH HAIL BETWEEN 515 AND 530 PM. THE STORM IS MOVING WEST AT ABOUT 5 MPH. IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN... AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.
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 30, 4:33 PM MST, 1 hour 8 minutes before
AZZ007>009>010-300430- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 430 PM MST THU AUG 30 1990 AT 415 PM MST TUCSON WEATHER RADAR AND VISUAL OBSERVATIONS INDICATED THUNDERSTORMS TO THE NORTH AND EAST OF THE TUCSON METROPOLITAN AREA... THESE STORMS ARE SLOWLY MOVING TO THE WEST AND SHOULD EFFECT THE TUCSON AREA WITHIN THE NEXT HOUR...A PIMA COUNTY FLOOD CONTROL DISTRICT RAIN GAUGE HAS REPORTED .55 INCHES OF RAINFALL SINCE 4:00 PM IN THE TANQUE VERDE FALLS AREA... ADDITIONALLY...THUNDERSTORMS ARE OCCURRING IN COCHISE AND SANTA CRUZ COUNTIES...A RAIN GAUGE SOUTH OF GREEN VALLEY REPORTED .55 INCHES OF RAIN IN 20 MINUTES... THESE THUNDERSTORMS ARE LIKELY TO PERSIST FOR THE REMAINDER OF THIS AFTERNOON AND INTO THE EVENING HOURS. VERY STRONG...POSSIBLY DAMAGING WINDS...HEAVY RAIN...AND LOCALIZED FLOODING MAY ACCOMPANY THESE STORMS. > PERSONS IN THE AFFECTED AREAS SHOULD EXERCISE EXTREME CAUTION. REMEMBER...THUNDERSTORfMS CAN CAUSE DAMAGING WINDS...HAIL...AND DANGEROUS LIGHTNING... GANSHEIMER NWS TUS
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 5:41 PM MST | Severe Thunderstorm Warning | TWC | Pima | 64 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.