Alert archive / Arizona / Flash Flood Warnings in 1990
Flash Flood Warning 1, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Jul 7, 1990, 11:31 AM MST for Pima County, Arizona. It was in force for 119 min.
The area
The counties it named.
The facts
- Issued
- Jul 7, 1990, 11:31 AM MST (18:31 UTC)
- Expired
- Jul 7, 1990, 1:30 PM MST
- In force
- 119 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 12:00Z, 6.5 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
- 582 J/kg
- Mixed-layer CIN
- -67 J/kg
- Mixed-layer LCL
- 1231 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 7 m²/s²
- 0-3 km storm-relative helicity
- 48 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 071831
FFWTUS
AZC019-072030-
BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
1131 AM MST SAT JUL 7 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 130 PM MST FOR PEOPLE IN THE FOLLOWING COUNTY
IN THE SOUTH CENTRAL PART OF ARIZONA
EASTERN PIMA
AT (1130 AM THUNDERSTORMS WERE PRODUCING HEAVY RAIN ON THE
TANQUE VERDE...PANTANO...AMD SANTA CRUZ WATER SHEDS. RUNOFF
IS EXPECTED TO RESULT IN FLOODING OF NORMALLY DRY CREEKS...WASHES
AND RIVERS IN EAST PIMA COUNTY THROUGH EARLY THIS AFTERNOON.
OVER TWO INCHES OF RAIN HAS ALREADY FALLEN ON THE TANQUE VERDE
WATERSHED WITHIN THE LAST ONE HOUR.
STAY OUT OF WASHES AND LOW LYING AREAS. FLASH FLOODS CAN OCCUR
WITH LITTLE OR NO ADVANCE WARNING.
IF YOU ARE IN THE WARNED COUNTY IN AN AREA SUBJECT TO FLOODING
MOVE TO HIGHER GROUND.
DO NOT ATTEMPT TO DRIVE OVER ROADS COVERED BY FLOOD WATERS OR
ACROSS FLOODED HIGHWAY DIPS.
CRIMMINS/NWS TUSWhat 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, Jul 7, 9:54 AM MST, 1 hour 37 minutes before
AZZ009-023-003-071900- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 945 AM MST SAT JUL 7 1990 AT 945 AM WEATHER RADAR INDICATED A LARGE AREA OF MODERATE TO HEAVY RAIN AND THUNDERSTORMS MOVING INTO SOUTHEAST PIMA COUNTY AND SANTA CRUZ COUNTY FROM NORTHERN SONORA. THE SHERIFFS DEPARTMENT IN NOGALES HAS REPORTED MODERATE RAIN AND STRONG GUSTY WINDS. THIS STORM SYSTEM IS MOVING NORTH AT 15 TO 20 MPH. MODERATE TO HEAVY RAIN...STRONG GUSTY WINDS AND DANGEROUS LIGHTNING IS EXPECTED WITH THIS STORM SYSTEM. THE THUNDERSTORMS AND HEAVY RAIN WILL MOVE INTO THE GREEN VALLEY AREA WITHIN THE NEXT 1 TO 2 HOURS. THE AIRMASS OVER SOUTHEAST ARIZONA IS VERY MOIST AND UNSTABLE. THUNDERSTORMS ARE LIKELY TODAY WITH HEAVY RAINS. FLOODING OF WASHES AND NORMALLY DRY CREEKS AND WASHES IS A STRONG POSSIBILITY. PERSONS ENGAGED IN OUTDOOR ACTIVITIES SHOULD BE ON THE ALERT FOR POSSIBLE FLOODING IF NORMALLY DRY CREEKS...WASHES AND FLOOD PRONE AREAS. < THESE THUNDERSTORMS ARE EXPECTED TO MOVE INTO THE TUCSON METROPOLITAN AREA BY LATE MORNING OR EARLY AFTERNOON. NWS TUS/CRIMMINS
Special weather statement, Jul 7, 10:47 AM MST, 44 minutes before
AZZ019-071900- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 1040 AM MST SAT JUL 7 1990 STRONG THUNDERSTORMS ARE MOVING INTO SOUTHERN TUCSON WITH VERY HEAVY RAIN...STRONG GUSTY WINDS AND DANGEROUS LIGHTNING. THESE THUNDERSTORMS ARE MOVING NORTH AT 15 TO 20 MPH AND WILL AFFECT THE TUCSON METROPOLTAN AREA WITHIN THE NEXT 30 MINUTES TO ONE HOUR. THESE THUNDERSTORMS DUMPED JUST OVER AN INCH OF RAIN IN THE GREEN VALEY AREA IN LESS THAN ONE HOUR. URBAN STREET FLOODING IS EXPECTED IN THE TUCSON AREA AS THESE THUNDERSTORMS MOVE ACROSS THE AREA IN THE NEXT 1 TO 2 HOURS. AGAIN...THE THUNDERSTORMS ARE MOVING NORTH AT 15 TO 20 MPH ACCOMPANIED BY STRONG GUSTY WINDS...HEAVY RAIN AND DANGEROUS LIGHTNING. FLOODING OF NORMALLY DRY CREEKS AND WASHES IS LIKEY IN EASTERN PIMA COUNTY. NWS TUS/CRIMMINS
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.