Alert archive / Arizona / Flash Flood Warnings in 1992

Flash Flood Warning 10, NWS Phoenix, AZ

July 29, 1992Maricopa County, Pinal County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Jul 29, 1992, 9:16 PM MST for Maricopa County, Pinal County, Arizona. It was in force for 104 min.

The area

The counties it named.

The facts

Issued: Jul 29, 1992, 9:16 PM MST (04:16 UTC)
Expired: Jul 29, 1992, 11:00 PM MST
In force: 104 min
Issued by: NWS Phoenix, AZ
Area: Whole counties

Counties Maricopa County, AZ, Pinal County, AZ

The nearest sounding before it

Tuscon, AZ (KTUS), launched 00:00Z, 4.3 hours before the alert went out and 143 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1352 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 2273 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 177 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KPHX 300436 COR
FFWPHX
AZC013-021-300615-

BULLETIN - EBS ACTIVATION REQUESTED ...CORRECTION
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PHOENIX ARIZONA
916 PM MST WED JUL 29 1992

THE NATIONAL WEATHER SERVICE IN PHOENIX ARIZONA HAS ISSUED A
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING
EFFECTIVE UNTIL 1115 PM MST
FOR THE FOLLOWING LOCATIONS...

IN SOUTH CENTRAL ARIZONA

   ...WEST CENTRAL MARICOPA COUNTY...WESTERN HALF OF PINAL COUNTY...
INCLUDING THE WEST...CENTRAL AND SOUTHEAST PORTIONS OF THE GREATER
PHOENIX AREA...BUCKEYE...GILA BEND...SUN LAKES...CASA GRANDE...
AND SECTIONS OF INTERSTATE 10 WEST OF PHOENIX AND INTERSTATE 8
BETWEEN CASA GRANDE AND GILA BEND.

THE TWO SEVERE THUNDERSTORMS AND FLASH FLOOD WARNINGS ISSUED EARLIER
FOR CENTRAL MARICOPA COUNTY...INCLUDING PHOENIX... AND PINAL COUNTY
HAVE BEEN COMBINED AND EXTENDED WESTWARD UNTIL 1115 PM.

INTENSE THUNDERSTORMS...SOME SEVERE...CONTINUED TO DEVELOP ACROSS
PARTS OF CENTRAL AND WEST PHOENIX...AND BETWEEN PHOENIX AND CASA
GRANDE AT 915 PM.  THESE THUNDERSTORMS WERE MOVING AND REDEVELOPING
WEST SOUTHWESTARD AT 10 TO 15 MPH...TOWARDS GILA BEND.

SEVERE THUNDERSTORMS CAN CAUSE WINDS IN EXCESS OF 57 MPH FOLLOWED
BY HEAVY RAIN THAT COULD LEAD TO FLOOD OR FLASH FLOODING.

NUMEROUS REPORTS OF WINDS IN EXCESS OF 50 MPH WERE REPORTED IN THE
GREATER PHOENIX THIS EVENING.  THERE HAS ALSO BEEN REPORTS OF FLOODED
STREETS AND UNDERPASSES.

AT 840 PM A PEAK WIND OF 60 MPH WAS REPORTED AT THE GOODYEAR AIRPORT.
WINDS ABOVE 60 MPH WERE REPORTED FROM A FEW SPOTTERS IN NORTH PHOENIX
EARLIER IN THE EVENING.

A FLASH FLOOD WATCH MEANS FLASH FLOODING IS POSSIBLE IN THE NEXT FEW
HOURS. WATCH THE WEATHER. IF YOU ARE NEAR A STREAM OR WASH...BE READY
TO MOVE TO HIGHER GROUND. STAY TUNED TO RADIO OR TV FOR WEATHER
UPDATES.

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...DSTAY 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
Jul 29, 6:15 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	2 hr
Jul 29, 7:32 PM MST	Flash Flood Warning	PSR	Maricopa, Pinal	118 min
Jul 29, 7:32 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	118 min
Jul 29, 9:16 PM MST	Severe Thunderstorm Warning	PSR	Maricopa

Nearby

Flash Flood Warnings in Arizona, 1992 Every flash flood warning in 1992

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.