Alert archive / Arizona / Flash Flood Warnings in 1990

Flash Flood Warning 2, NWS Phoenix, AZ

May 28, 1990Mohave County, Arizona

NWS Phoenix, AZ issued this flash flood warning at May 28, 1990, 2:57 PM MST for Mohave County, Arizona. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
May 28, 1990, 2:57 PM MST (21:57 UTC)
Expired
May 28, 1990, 6:00 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 12:00Z, 10.0 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 1990-05-28Temperature 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 1990-05-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 99 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
920 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
99 m²/s²
0-3 km storm-relative helicity
136 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 282202
FFWPHX
AZC015-290100-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PHOENIX ARIZONA
257 PM MST MON MAY 28 1990
 
THE NATIONAL WEATHER SERVICE IN PHOENIX ARIZONA HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  600 PM MST
FOR THE FOLLOWING LOCATIONS......
 
IN NORTHWEST ARIZONA
 
   ...SOUTHERN MOHAVE COUNTY
 
HEAVY RAIN...STRONG GUSTY WINDS...AND HAIL HAVE BEEN REPORTED ALONG
THE COLORADO RIVER IN THE VICINITY OF BULLHEAD CITY. RADAR AND
SATELLITE PICTURES SHOW SHOWERS AND THUNDERSTORMS IN THE WARNING
AREA...AND THEY MAY PERSIST FOR THE NEXT HOUR OR TWO...RESULTING IN
FURTHER ACCUMULATION OF WATER.
 
 
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.
 
MOST DEATHS IN FLASH FLOODING OCCUR IN AUTOMOBILES. DONT TRY TO CROSS
FLOODING WASHES OR STREAMS. NEVER DRIlVE ONTO A BRIDGE COVERED BY
WATER. STAY OFF FLOODED CITY STREETS. OUTSIDE THE CITY...STAY ON MAIN
HIGHWAYS. AVOID SECONDARY ROADS AND FARM ROADS
.

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, May 28, 2:02 PM MST, 55 minutes before
AZZALL-290300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PHOENIX ARIZONA
200 PM MST MON MAY 28 1990

...A WIND ADVISORY REMAINS IN EFFECT THROUGH THE AFTERNOON HOURS FOR
NORTHERN AND EASTERN ARIZONA...

AN UNSEASONABLY STRONG WEATHER DISTURBANCE HAS MOVED INTO ARIZONA...
RESULTING IN STRONG GUSTY WINDS FOR MUCH OF THE STATE. AT 130 PM SHOW
LOW REPORTED SOUTHERLY WINDS GUSTING TO ABOUT 55 MPH...PAGE 50 MPH...
AND PINETOP 48 MPH. ELSEWHERE OVER THE NORTHERN HALF OF THE STATE
SOUTH TO SOUTHWEST WINDS HAVE MOSTLY GUSTED TO BETWEEN 35 AND 40 MPH.

WINDS HAVE ALSO INCREASED ELSEWHERE. WIND GUSTS TO ABOUT 30 MPH HAVE
BEEN REPORTED ACROSS SOUTHEAST ARIZONA...AND WINDS IN THIS AREA MAY
REACH 40 MPH LATER THIS AFTERNOON.

ALONG WITH THE WIND THERE HAS BEEN AN INCREASE IN CLOUDS AND SHOWERS.
OVER A HALF INCH OF RAIN HAS FALLEN AT KINGMAN AND BULLHEAD CITY TODAY.

SCATTERED SHOWERS WILL SPREAD ACROSS MOST OF THE STATE THIS AFTERNOON
AND TONIGHT...ALONG WITH POSSIBLY A FEW THUNDERSTORMS. LATE TONIGHT THE
SNOW LEVEL WILL LOWER TO AROUND 75 HUNDRED FEET. A FEW INCHES OF WET
SNOW MAY ACCUMULATE IN THE NORTHERN AND CENTRAL MOUNTAINS ABOVE 8 THOUSAND
FEET.

MOTORISTS WILL NEED TO =USE EXTRA CAUTION DUE TO THE STRONG GUSTY WINDS
...ESPECIALLY WHILE DRIVING HIGH PROFILE VEHICLES OR PULLING TRAILERS.
IN ADDITION CAMPERS WILL NEED TO MAKE SURE CAMPFIRES ARE COMPLETELY
OUT BEFORE LEAVING.

JP 282100Z

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.