Alert archive / Nevada / Flash Flood Warnings in 1992

Flash Flood Warning 1, NWS Las Vegas, NV

March 30, 1992Clark County, Nevada

NWS Las Vegas, NV issued this flash flood warning at Mar 30, 1992, 6:37 PM PST for Clark County, Nevada. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
Mar 30, 1992, 6:37 PM PST (02:37 UTC)
Expired
Mar 30, 1992, 9:00 PM PST
In force
2 hr
Issued by
NWS Las Vegas, NV
Area
Whole counties

County Clark County, NV

The nearest sounding before it

Mercury/Desert R, NV (KDRA), launched 00:00Z, 2.6 hours before the alert went out and 99 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 1992-03-31Temperature 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 00:00Z on 1992-03-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -7 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1324 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-7 m²/s²
0-3 km storm-relative helicity
30 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 310240
FFWLAS
NVC003-310500-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
637 PM PST MON MAR 30 1992
 
THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  900 PM PST
FOR PEOPLE IN THE FOLLOWING LOCATIONS......
 
IN SOUTH NEVADA
 
   ...CLARK COUNTY
 
DISPATCHER AT THE NATIONAL PARK SERVICE IN BOULDER CITY REPORTS HEAVY
RAIN.
 
THE LAS VEGAS RADAR SHOWS AN AREA OF HEAVY RAIN MOVING NORTH FROM FROM
EXREME SOUTHERN NEVADA.
 
AFTER THE HEAVY RAIN EARLIER TODAY.. FLASH FLOODING IS IMMINENT.
 
THE RAIN GAGE AT JEAN NV HAS PICKED UP .39 OF AN INCH OF RAIN DURING
THE PAST TWO HOURS.
 
 
 
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY.  THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
CROSS SAFELY.  VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY.  MOVE TO HIGHER GROUND.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT.  MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.  DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS
THE ROADWAY.  NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL
ONE...ON FOOT.  TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.

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

Local storm report, Mar 30, 3:35 PM PST, 3 hours 2 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS, NV
335 PM PST MON MAR 30 1992

TIME          EVENT

1430 PST      PRECIP REPORTS FOR 3 HOURS FROM THE ALERT SYSTEM
              ENDING 1430 PST.

              LAS VEGAS CREEK NEAR LAMB BLVD .....  1.53
              FLAMINGO WASH NEAR NELLIS BLVD .....   .71
              SLOAN CHANNEL AND LAS VEGAS BLVD ...   .79
              LAS VEGAS WASH AT SAHARA ...........   .63
              NWS OFFICE AT MCCARRAN .............   .67

SMITH/2239Z
Local storm report, Mar 30, 4:17 PM PST, 2 hours 20 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS, NV
417 PM PST MON MAR 30 1992

TIME          EVENT

1145 PST      TORNADO TOUCHED DOWN AT 12997 LAS VEGAS BLVD
              SOUTH.  TORE HOUSE UP AND OFF ITS FONDATION.
              HORSE TRAILER THROWN SEVERAL HUNDRED FEET.

              2 HOUSES SOUTHEAST OF THE AIRPORT LOST ROOFS.

1615 PST      NUMEROUS ROAD CLOSURES DUE FLOODING.  WATER
              IN WASHES CONTINUES TO RUN AT BANK FULL.L

SMITH/0015Z

Nearby

Flash 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.