Alert archive / Arizona / Flash Flood Warnings in 1994

Flash Flood Warning 3, NWS Phoenix, AZ

March 20, 1994Mohave County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Mar 20, 1994, 12:10 AM MST for Mohave County, Arizona. It was in force for 50 min.

The area

The counties it named.

The facts

Issued
Mar 20, 1994, 12:10 AM MST (07:10 UTC)
Expired
Mar 20, 1994, 1:00 AM MST
In force
50 min
Issued by
NWS Phoenix, AZ
Area
Whole counties

County Mohave County, AZ

The nearest sounding before it

Mercury/Desert R, NV (KDRA), launched 00:00Z, 7.2 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 00:00Z on 1994-03-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 14 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, Mercury/Desert R, NV at 00:00Z on 1994-03-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 3 square meters per square second.193958Sfc1 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
14 J/kg
Mixed-layer CIN
-43 J/kg
Mixed-layer LCL
1687 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
3 m²/s²
0-3 km storm-relative helicity
-77 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 200711
FFWPHX
AZC015-200830-

BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PHOENIX AZ
1210 aM MST Sun MAR 20 1994

THE NATIONAL WEATHER SERVICE IN PHOENIX AZ HAS ISSUED A FLASH FLOOD
WARNING EFFECTIVE UNTIL 1:00 AM MST FOR PEOPLE IN THE FOLLOWING
LOCATIONS...

IN NORTHWESTERN ARIZONA

  ...MOHAVE COUNTY
     INCLUDING BULLHEAD CITY and kingman

locally heavy rains were still in progress over much of mohave county at
midnight, though satellite pictures indicated the heaviest showers were
moving out of extreme western mohave county.  but heavy rains were still
present around kingman, moving toward the east around 20 mph.  as of
midnight kingman reported a total of 1.80 inches of rain from the storm.

police and the sheriff's office report flooding in progress across much
of the county.  although no roads were closed in the kingman area some
were closes around bullhead city.  driving has become very hazardous,
and extreme caution will be need for the next couple of hours.

please remember:
   DO NOT DRIVE AROUND POLICE BARRICADES.
   DO NOT ATTEMPT TO DRIVE THROUGH RISING WATER.
   DO NOT TRY TO CROSS FLOODED HIGHWAYS. MOST FLASH FLOOD DEATHS OCCUR   
      IN AUTOMOBILES.
   DO NOT TRY TO OUTRACE A FLASH FLOOD. MOVE TO HIGHER GROUND.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS IMMINENT.
 
perfrement

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, Mar 19, 7:07 PM MST, 5 hours 3 minutes before
AZZ008-200400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
700 PM MST SAT MAR 19 1994

...SHOWERS AND THUNDERSTORMS MOVING THROUGH WESTERN MARIPOPA COUNTY...

AT 650 PM NATIONAL WEATHER SERVICE RADAR DETECTED AN AREA OF SHOWERS AND
SEVERAL THUNDERSTORMS OVER SOUTHWEST MARICOPA COUNTY.  THE STRONGEST
STORM WAS OVER GILA BEND, ABOUT 40 MILES SOUTHWEST OF SKY HARBOR
INTERNATIONAL AIRPORT.  THESE STORMS ARE MOVING TOWARD THE NORTHEAST AT
40 MILES PER HOUR, AND SHOULD AFFECT MUCH OF THE PHOENIX METROPOLITAN
AREA BETWEEN 8 AND 9 PM.  THESE STORMS WILL PRODUCE BRIEF HEAVY RAINS
AND LIGHTNING.

GREEN
Special weather statement, Mar 19, 8:28 PM MST, 3 hours 42 minutes before
AZZ008-004-200500-

SPECIAL WEATHER STATEMENT...UPDATE
NATIONAL WEATHER SERVICE PHOENIX AZ
826 PM MST SAT MAR 19 1994

<
...SHOWERS AND THUNDERSTORMS MOVING RAPIDLY THROUGH THE PHOENIX METRO
AREA...

AT 825 PM NATIONAL WEATHER SERVICE RADAR DETECTED AN AREA OF SHOWERS AND
THUNDERSTORMS EXTENDING FROM NORTH PHOENIX THROUGH NORTH SCOTTSDALE AND
NORTH OF FOUNTAIN HILLS.  THIS AREA OF STORMS IS MOVING TO THE NORTHEAST
AT 40 MILES PER HOUR, AND SHOULD BE NORTH OF THE METRO AREA BY 9 PM.

THE RAPID MOVEMENT OF THESE STORMS HAS RESULTED IN MINIMAL RAINFALL
TOTALS.  UP TO TWO-TENTHS OF AN INCH OF RAIN HAS FALLEN IN A NARROW BAND
EXTENDING FROM FAR SOUTHWEST PHOENIX TO CENTRAL SCOTTSDALE, BUT nNO RAIN
FELL ACROSS MUCH OF THE EAST VALLEY.

GREEN

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 19, 10:50 PM MSTFlash Flood WarningPSRMohave95 min

Nearby

Flash Flood Warnings in Arizona, 1994Every flash flood warning in 1994

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.