Alert archive / Arizona / Flash Flood Warnings in 1990
Flash Flood Warning 43, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Aug 12, 1990, 6:22 PM MST for Mohave County, Arizona. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Aug 12, 1990, 6:22 PM MST (01:22 UTC)
- Expired
- Aug 12, 1990, 9:30 PM MST
- In force
- 3 hr
- Issued by
- NWS Phoenix, AZ
- Area
- Whole counties
County Mohave 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
Mercury/Desert R, NV (KDRA), launched 00:00Z, 1.4 hours before the alert went out and 226 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
- 64 J/kg
- Mixed-layer CIN
- -61 J/kg
- Mixed-layer LCL
- 3346 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 19 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 KPHX 130123 FFWPHX AZC015-130430- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE PHOENIX ARIZONA 622 PM MST SUN AUG 12 1990 THE NATIONAL WEATHER SERVICE IN PHOENIX ARIZONA HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 930 PM MST FOR THE FOLLOWING LOCATIONS...... IN NORTHWEST ARIZONA ...MOHAVE COUNTY THUNDERSTORMS WITH HEAVY RAIN HAVE DEVELOPED OVER MOHAVE COUNTY THE PAST COUPLE OF HOURS...AND AT 615 PM WERE CONTINUING TO DEVELOP. A RAIN GAUGE IN KINGMAN HAS REPORTED 1.92 INCHES OF RAIN SINCE 430 PM. FLASH FLOODING IS ALREADY HAPPENING OR ABOUT TO HAPPEN. MOVE AWAY FROM STREAMS OR WASHES. HEAD FOR HIGHER GROUND. ON THE HIGHWAY...SLOW DOWN AND KEEP A SHARP LOOKOUT AHEAD FOR FLOODING.
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 12, 4:17 PM MST, 2 hours 5 minutes before
AZZALL-130100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PHOENIX ARIZONA 415 PM MST SUN AUG 12 1990 THUNDERSTORM ACTIVITY AT 4 PM WAS NOT AS EXTENSIVE AS AT THE SAME TIME YESTERDAY...WITH MOST OF TODAY/S ACTION MOVING SOUTHWEST OFF THE CENTRAL MOUNTAINS AT THIS TIME. THE STRONGEST THUNDERSTORMS SHOWN BY RADAR WERE LOCATED IN A LINE EXTENDING FROM NORTHWEST OF PAYSON TO ABOUT 20 MILES SOUTH OF THE TOWN. THERE WAS ALSO A STRONG THUNDERSTORM CELL LOCATED OVER THE SALT RIVER CANYON. MOTORISTS IN THIS AREA WILL NEED TO USE EXTREME CAUTION FOR THE NEXT HOUR...ESPECIALLY WATCHING FOR FALLING ROCKS AND/OR ROCK SLIDES. MOVEMENT OF THE THUNDERSTORMS WAS TOWARD THE SOUTHWEST ABOUT 20 M9ILES AN HOUR. > JP 122315Z
Special weather statement, Aug 12, 5:36 PM MST, 46 minutes before
AZZALL-130200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PHOENIX ARIZONA 535 PM MST SUN AUG 12 1990 AT 530 PM WEATHER RADAR SHOWED AN AREA OF LOCALLY HEAVY THUNDERSTORMS MOVING SOUTHWEST THROUGH GILA COUNTY. WITHIN THE NEXT HOUR THESE STORMS COULD BE IN THE GLOBE AREA...AND OVER ROOSEVELT LAKE. MOTORISTS IN THESE AREAS...AND BOATERS ON THE LAKE...WILL NEED TO WATCH WEATHER CONDITIONS CAREFULLY THE NEXT HOUR OR SO. IN ADDITION TO HEAVY \RAIN AND STRONG GUSTY WINDS LIGHTNING DETECTION EQUIPMENT SHOWED INTENSE LIGHTNING WITH THESE THUNDERSTORMS. JP 130035Z
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.