Alert archive / Arizona / Flash Flood Warnings in 1990
Flash Flood Warning 48, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Aug 14, 1990, 12:00 PM MST for Maricopa County, Arizona. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Aug 14, 1990, 12:00 PM MST (19:00 UTC)
- Expired
- Aug 14, 1990, 2:18 PM MST
- In force
- 2 hr
- Issued by
- NWS Phoenix, AZ
- Area
- Whole counties
County Maricopa 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, 7.0 hours before the alert went out and 198 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
- 29 J/kg
- Mixed-layer CIN
- -16 J/kg
- Mixed-layer LCL
- 806 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -30 m²/s²
- 0-3 km storm-relative helicity
- -23 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 141909 FFWPHX AZC013-021-025-142145- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE PHOENIX ARIZONA 1200 PM MST TUE AUG 14 1990 THE NATIONAL WEATHER SERVICE IN PHOENIX ARIZONA HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 300 PM MST FOR THE FOLLOWING LOCATIONS... IN SOUTH CENTRAL ARIZONA ...CENTRAL MARICOPA COUNTY...THE GREATER PHOENIX...SALT RIVER RECREATIONAL LAKES...AND APACHE JUNCTION... ....IN PINAL COUNTY INCLUDING THE CITIES AND HIGHWAYS CONNECTING CASA GRANDE...COOLIDGE...FLORENCE... SUPERIOR...AND THE SMALLER TOWNS OF KEARNY...HAYDEN...AND MAMMOTH... IN WEST CENTRAL ARIZONA ...SOUTHEAST YAVAPAI COUNTY...FROM PRESCOTT SOUTH TO THE NORTH EDGE OF THE GREATER PHOENIX AREA... INCLUDING INTERSTATE 17... AT 12 PM SATELLITE AND RADAR INFORMATION SHOWED AND EXTENSIVE AREA OF RAIN ENCOMPASSING MOST OF CENTRAL ARIZONA. RAIN IN THE GREATER PHOENIX AREA HAS TAPPERED OFF TO OCCASIONALLY MODERATE...HOWEVER ENOUGH TO CONTINUE TO AGGRAVATE THE FLOODING SITUATION. THE TOWN OF DESERT HILLS IN THE FAR NORTH PART OF THE GREATER PHOENIX AREA REPORTED 3.42 INCHES OF RAIN IN LESS THAN 2 HOURS. A STORM SPOTTER IN CENTRAL PHOENIX...16TH STREET AND MISSOURI.. REPORTED NEARLY 3 INCHES OF RAIN THIS MORNING. HEAVY RAIN WAS SPREADING INTO SOUTHERN YAVAPAI COUNTY AT NOON. DEVELOPING SHOWERS AND THUNDERSTORMS BETWEEN PRESCOTT AND PHOENIX ARE EXPECTED TO PRODUCE HEAVY AMOUNTS THAT WILL LEAD TO FLOOD OR FLASH FLOODING. AGAIN THE FLASH FLOOD WARNING HAS BEEN EXTENDED UNTIL 3 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. URBAN FLOODING IS OVERFLOW OF CITY STREETS AND DRAINAGE SYSTEMS... ENOUGH TO FLOOD RESIDENCES AND BUSINESSES AND CLOSE CITY STREETS. POSTPONE ANY UNNECESSARY DRIVING UNTIL THE STORM IS OVER. MOST DEATHS IN FLASH FLOODING OCCUR IN AUTOMOBILES. DONT TRY TO CROSS FLOODING WASHES OR STREAMS. NEVER DRIVE ONTO A BRIDGE COVERED BY WATER. STAY OFF FLOODED CITY STREETS. OUTSIDE THE CITY...STAY ON MAIN HIGHWAYS. AVOID SECONDARY ROADS 'AND FARM ROADS...ESPECIALLY AT NIGHT. VASQUEZ
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 13, 5:30 PM MST | Flash Flood Warning | PSR | La Paz, Mohave | 3 hr |
| Aug 13, 8:03 PM MST | Severe Thunderstorm Warning | PSR | Yuma | 117 min |
| Aug 14, 8:15 AM MST | Flash Flood Warning | PSR | Gila, Maricopa, Pinal | 4 hr |
| Aug 14, 12:00 PM MST | Flash Flood Warning | PSR | Pinal | 3 hr |
| Aug 14, 12:00 PM MST | Flash Flood Warning | PSR | Yavapai | 3 hr |
| Aug 14, 2:18 PM MST | Flash Flood Warning | PSR | Yavapai | 3 hr |
| Aug 14, 2:18 PM MST | Flash Flood Warning | PSR | Maricopa | 3 hr |
| Aug 14, 4:30 PM MST | Flash Flood Warning | PSR | La Paz, Yuma | 60 min |
| Aug 14, 4:30 PM MST | Severe Thunderstorm Warning | PSR | La Paz, Yuma | 60 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.