Alert archive / Arizona / Flash Flood Warnings in 1992

Flash Flood Warning 10, NWS Las Vegas, NV

August 30, 1992Mohave County, Arizona; Clark County, Nevada

NWS Las Vegas, NV issued this flash flood warning at Aug 30, 1992, 1:00 PM MST for Mohave County, Arizona; Clark County, Nevada. It was in force for 60 min.

The area

The counties it named.

The facts

Issued
Aug 30, 1992, 1:00 PM MST (20:00 UTC)
Expired
Aug 30, 1992, 2:00 PM MST
In force
60 min
Issued by
NWS Las Vegas, NV
Area
Whole counties

Counties Mohave County, AZ, Clark County, NV

The nearest sounding before it

Mercury/Desert R, NV (KDRA), launched 12:00Z, 8.0 hours before the alert went out and 162 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 1992-08-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 24 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 12:00Z on 1992-08-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 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
24 J/kg
Mixed-layer CIN
-182 J/kg
Mixed-layer LCL
2396 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
155 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 KLAS 302003
FFWLAS
AZC015-NVC003-302100-
 
BULLETIN - EBS ACTIVATION REQUESTED
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
100 PM PDT SUN AUG 30 1992
 
THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING
EFFECTIVE UNTIL  200 PM PDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...S...
 
IN NORTHWEST ARIZONA
 
   ...MOHAVE COUNTY
 
 
IN SOUTH NEVADA
 
   ...EASTERN CLARK COUNTY
 
THE NATIONAL PARK SERVICE REPORTS 1/2 TO 1 INCH HAIL AT BOULDER BEACH
AND LAS VEGAS WASH WITH STRONG GUSTY WINDS. A WEATHER SPOTTER IN HEN-
DERSON REPORTED WINDS IN EXCESS OF 60 MPH.
 
HENDERSON AND THE LAKE MEAD RECREATION AREA ARE INCLUDED IN THE
WARNING AREA...LAS VEGAS IS NOT INCLUDED.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...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.
 
DJR/2003Z

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 30, 10:30 AM MST, 2 hours 30 minutes before
NVZ008-009-302200-
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1030 AM PDT SUN AUG 30 1992

...SHOWERS AND THUNDERSTORMS OVER SOUTHERN NEVADA...

THE LAS VEGAS RADAR AND LIGHTNING DETECTION SENSORS SHOWED SHOWERS AND
THUNDERSTORMS OVER CLARK AND EASTERN LINCOLN COUNTIES IN SOUTHERN NEVADA
AND NORTHWEST MOHAVE COUNTY IN ARIZONA LATE THIS MORNING.  THE THUNDER-
STORMS WERE MOVING TO THE NORTH OR NORTHEAST AT ABOUT 15 MPH.

SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED TO CONTINUE THROUGH THE
DAY.  IN ADDITION TO DEADLY LIGHTNING...SOME OF THESE THUNDERSTORMS MAY
PRODUCE BRIEF HEAVY RAIN...SMALL HAIL AND STRONG GUSTY WINDS.

BE PEPARED TO SEEK SHELTER IF A THUNDERSTORM APPROACHES YOUR AREA.  STAY
AWAY FROM FLOOD-PRONE AREAS AND WASHES.  REMEMBER...NEVER TRY TO CROSS A
FLOODED ROADWAY IN YOUR CAR OR ON FOOT.

LISTEN TO COMMERCIAL RADIO...TELEVISION OR NOAA WEATHER RADIO FOR THE
LATEST WEATHER INFORMATION.
DJR/1730Z

The office that day

Everything else NWS Las Vegas, NV issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 30, 12:33 PM MSTFlash Flood WarningVEFClark57 min
Aug 30, 1:00 PM MSTSevere Thunderstorm WarningVEFClark60 min

Nearby

Flash Flood Warnings in Arizona, 1992Flash Flood Warnings in Nevada, 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.