Alert archive / Nevada / Flash Flood Warnings in 1992

Flash Flood Warning 9, NWS Las Vegas, NV

August 30, 1992Clark County, Nevada

NWS Las Vegas, NV issued this flash flood warning at Aug 30, 1992, 12:33 PM PDT for Clark County, Nevada. It was in force for 57 min.

The area

The counties it named.

The facts

Issued
Aug 30, 1992, 12:33 PM PDT (19:33 UTC)
Expired
Aug 30, 1992, 1:30 PM PDT
In force
57 min
Issued by
NWS Las Vegas, NV
Area
Whole counties

County Clark County, NV

The nearest sounding before it

Mercury/Desert R, NV (KDRA), launched 12:00Z, 7.6 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 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

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 PDT, 2 hours 3 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, 1:00 PM PDTFlash Flood WarningVEFClark60 min
Aug 30, 1:00 PM PDTSevere Thunderstorm WarningVEFClark60 min

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.