Alert archive / Nevada / Flash Flood Warnings in 1990

Flash Flood Warning 17, NWS Las Vegas, NV

August 16, 1990Clark County, Nevada

NWS Las Vegas, NV issued this flash flood warning at Aug 16, 1990, 12:00 AM PDT for Clark County, Nevada. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
Aug 16, 1990, 12:00 AM PDT (07:00 UTC)
Expired
Aug 16, 1990, 2:00 AM PDT
In force
2 hr
Issued by
NWS Las Vegas, NV
Area
Whole counties

County Clark County, NV

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 00:00Z, 7.0 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 1990-08-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 366 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 1990-08-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -1 square meters per square second.1939Sfc1 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
366 J/kg
Mixed-layer CIN
-28 J/kg
Mixed-layer LCL
2247 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
-1 m²/s²
0-3 km storm-relative helicity
33 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 15, 10:30 PM PDT, 1 hour 30 minutes before
NVZ008-009-161000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1030 PM PDT WED AUG 15 1990

...THUNDERSTORMS LINGERING OVER SOUTHERN NEVADA...

AT 1030 PM PDT THE LAS VEGAS WEATHER RADAR AND LIGHTNING DETECTION
SENSORS SHOW THAT THUNDERSTORMS ARE STILL OCCURRING OVER CLARK...NYE
...ESMERALDA AND LINCOLN COUNTIES IN SOUTHERN NEVADA.  SOME OF THESE
THUNDERSTORMS MAY PRODUCE HEAVY RAIN...STRONG GUSTY WINDS...DEADLY
LIGHTNING AND HAIL.

LOCAL FLOODING OF LOW LYING AREAS AND NORMALLY DRY WASHES IS POSSIBLE
TONIGHT.  REMEMBER...NEVER ATTEMPT TO CROSS A FLOODED ROADWAY...EITHER
ON FOOT OR IN YOUR CAR.

IF LIGHTNING IS NEARBY SEEK SHELTER INDOORS OR IN YOUR CAR.  NEVER SEEK
SHELTER FROM LIGHTNING UNDER A TREE.
.
STRONG GUSTY WINDS ASSOCIATED WITH THUNDERSTORMS MAY CAUSE AREAS OF
BLOWING DUST AND SAND WHICH WILL REDUCE VISIBILITY AT TIMES.

MOTORISTS AND PERSONS ENGAGED IN OUTDOOR ACTIVITIES IN SOUTHERN NEVADA
TONIGHT ARE URGED TO USE CAUTION AND TAKE NECESSARY PRECAUTIONS IF THUN-
DERSTORMS MOVE INTO YOUR AREA.  BOATERS ON LAKE MEAD AND LAKE MOHAVE ARE
REMINDED THAT A LAKE WIND ADVISORY IS IN EFFECT TONIGHT FOR GUSTY WINDS
AROUND THUNDERSTORMS.

LISTEN TO COMMERCIAL RADIO...TELEVISION OR NOAA WEATHER RADIO FOR THE
LATEST FORECASTS OR ADDITIONAL STATEMENTS.
DJR/0530Z
Special weather statement, Aug 15, 11:36 PM PDT, 24 minutes before
NVZ009-160800-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1135 PM PDT WED AUG 15 1990

...THUNDERSTORMS ARE MOVING INTO EASTERN CLARK COUNTY...

AT 1130 PM PDT RADAR AND LIGHTNING DETECTION EQUIPMENT SHOWED THUNDER-
STORMS MOVING INTO EASTERN CLARK CLARK COUNTY.  THE THUNDERSTORMS ARE
APPROACHING MOAPA...GLENDALE AND LOGANDALE.  THEY WILL MOVE SOUTHEAST
TOWARD OVERTON AND OVERTON BEACH AND ON TO ECHO BAY AND TEMPLE BAR.

THUNDERSTORMS ARE EXPECTED TO CONTINUE OVER NORTHERN AND EASTERN CLARK
COUNTY FOR THE NEXT FEW HOURS.  SOME OF THEM MAY PRODUCE HEAVY RAIN...
STRONG GUSTY WINDS...DEADLY LIGHTNING AND HAIL.

LOCAL FLOODING OF LOW LYING AREAS AND NORMALLY DRY WASHES IS POSSIBLE.
REMEMBER..NEVER ATTEMPT TO CROSS FLOODED ROADS ON FOOT OR IN YOUR CAR.

GUSTY WINDS ASSOCIATED WITH THUNDERSTORMS WILL CAUSE LOCAL AREAS OF
BLOWING DUST AND SAND.

IF LIGHTNING IS NEARBY TAKE SHELTER INDOORS OR IN YOUR CAR.  NEVER SEEK
SHELTER FROM LIGHTNING UNDER A TREE.

PERSONS ENGAGED IN OUTDOOR ACTIVITES IN NORTHERN AND EASTERN CLARK COUNTY
TONIGHT ARE URGED TO USE CAUTION AND KEEP AN EYE ON THE SKY.

LISTEN TO COMMERCIAL RADIO...TELEVISION OR NOAA WEATHER RADIO FOR THE
.LATEST WEATHER INFORMATION.
DJR/0635Z

Nearby

Flash Flood Warnings in Nevada, 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.