Alert archive / Arizona / Flash Flood Warnings in 1992

Flash Flood Warning 22, NWS Phoenix, AZ

August 25, 1992Mohave County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Aug 25, 1992, 2:05 PM MST for Mohave County, Arizona. It was in force for 115 min.

The area

The counties it named.

The facts

Issued
Aug 25, 1992, 2:05 PM MST (21:05 UTC)
Expired
Aug 25, 1992, 4:00 PM MST
In force
115 min
Issued by
NWS Phoenix, AZ
Area
Whole counties

County Mohave County, AZ

The nearest sounding before it

Mercury/Desert R, NV (KDRA), launched 12:00Z, 9.1 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.

Skew-T log-pSkew-T log-p diagram, Mercury/Desert R, NV at 12:00Z on 1992-08-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Mercury/Desert R, NV at 12:00Z on 1992-08-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 61 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2851 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
61 m²/s²
0-3 km storm-relative helicity
-15 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 252109
FFWPHX
AZC005-015-252300-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PHOENIX ARIZONA
205 PM MST TUE AUG 25 1992
 
THE NATIONAL WEATHER SERVICE IN PHOENIX ARIZONA HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 400 PM MST
FOR THE FOLLOWING LOCATIONS...
 
IN NORTH CENTRAL ARIZONA
 
   ...EXTREME NORTHWESTERN COCONINO COUNTY
 
IN NORTHWEST ARIZONA
 
   ...EXTREME NORTHEASTERN MOHAVE COUNTY
 
STRONG THUNDERSTORMS HAVE DEVELOPED OVER EXTREME SOUTHERN UTAH...AND
IN ARIZONA NEAR THE UTAH BORDER NORTHWEST OF JACOB LAKE. THE STORMS
WERE MOVING TOWARD THE EAST 15 TO 20 MPH.
 
SHORTLY BEFORE 2 PM...AT PIPE SPRINGS NATIONAL MONUMENT...ON STATE ROU
389...AN INCH OF RAIN WAS REPORTED IN ABOUT A HALF HOUR...ALONG WITH
SOME HAIL. AS A RESULT OF THE RAIN FLOODING OF ROUTE 389 IN THIS AREA
HAS TAKEN PLACE...AND MOST WASHES WERE RUNNING.
 
MOST DEATHS IN FLASH FLOODING OCCUR IN AUTOMOBILES. DONT TRY TO CROSS
FPLOODING 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.

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 25, 1:21 PM MST, 44 minutes before
AZZALL-252300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PHOENIX ARIZONA
120 PM MST TUE AUG 25 1992

...THUNDERSTORMS DEVELOPING OVER NORTHERN ARIZONA...

SCATTERED THUNDERSTORMS BEGAN TO DEVELOP OVER NORTHERN ARIZONA
EARLY THIS AFTERNOON. AS OF 1 PM THE HEAVIEST STORMS WERE LOCATED
ALONG AND NEAR ARIZONAS NORTHERN BORDER WITH ANOTHER HEAVY STORM
JUST TO THE NORTHEAST OF FLAGSTAFF. SOME OF THESE HEAVY THUNDER
STORMS MAY PRODUCE SOME BRIEF HEAVY RAINFALL AND SMALL HAIL.

WINDS ALOFT ARE LIGHT SO THESE THUNDERSTORMS WILL HAVE LITTLE
MOVEMENT.

SCATTERED THUNDERSTORMS WILL CONTINUE OVER PORTIONS OF NORTHERN
ARIZONA THIS AFTERNOON. THEY WILL GRADUALLY END EARLY THIS EVENING.

DKS8

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 25, 2:05 PM MSTFlash Flood WarningPSRCoconino115 min

Nearby

Flash Flood Warnings in Arizona, 1992Every 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.