Alert archive / Arizona / Flash Flood Warnings in 1988

Flash Flood Warning 13, NWS Phoenix, AZ

August 27, 1988Maricopa County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Aug 27, 1988, 1:58 PM MST for Maricopa County, Arizona. It was in force for 92 min.

The area

The counties it named.

The facts

Issued
Aug 27, 1988, 1:58 PM MST (20:58 UTC)
Expired
Aug 27, 1988, 3:30 PM MST
In force
92 min
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, 9.0 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.

Skew-T log-pSkew-T log-p diagram, Tuscon, AZ at 12:00Z on 1988-08-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1729 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tuscon, AZ at 12:00Z on 1988-08-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 67 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1729 J/kg
Mixed-layer CIN
-93 J/kg
Mixed-layer LCL
1360 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
67 m²/s²
0-3 km storm-relative helicity
58 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 272104
FFWPHX
AZC013-272230-
 
BULLETIN - EBS ACTIVATION REQUESTED
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PHOENIX AZ
158 PM MST SAT AUG 27 1988
 
THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 330 PM MST
AND A FLASH FLOOD WARNING EFFECTIVE UNTIL 330 PM MST
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTH CENTRAL ARIZONA
          ...NORTHERN MARICOPA
 
THIS WARNING INCLUDES THE GREATER PHOENIX METRO AREA.
 
AT 155 PM MST RADAR INDICATED A LINE OF HEAVY THUNDERSTORMS MOVING
INTO THE FAR NORTHWEST PART OF THE SALT RIVER VALLEY. WIND GUSTS OF AT
LEAST 50 MPH ALONG WITH BLINDING DUST WERE REPORTED AT
YOUNGTOWN...WHILE DESERT HILLS REPORTED WINDS OF 45 TO 50 MPH.
IN ADDITION...VERY HEAVY RAIN WITH LOTS OF URBAN FLOODING IS LIKELY
WITH THIS INTENSE THUNDERSTORM.
 
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.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNI>NG...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

The office that day

Everything else NWS Phoenix, AZ issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 27, 10:48 AM MSTFlash Flood WarningPSRMohave117 min
Aug 27, 10:48 AM MSTFlash Flood WarningPSRYavapai117 min
Aug 27, 1:58 PM MSTSevere Thunderstorm WarningPSRMaricopa92 min
Aug 27, 3:22 PM MSTSevere Thunderstorm WarningPSRPinal68 min
Aug 27, 3:25 PM MSTFlash Flood WarningPSRGila2 hr

Nearby

Flash Flood Warnings in Arizona, 1988Every flash flood warning in 1988

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.