Alert archive / Nevada / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 2, NWS Las Vegas, NV

July 13, 1990Clark County, Nevada

NWS Las Vegas, NV issued this severe thunderstorm warning at Jul 13, 1990, 8:44 PM PDT for Clark County, Nevada. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Jul 13, 1990, 8:44 PM PDT (03:44 UTC)
Expired
Jul 13, 1990, 11:45 PM PDT
In force
3 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, 3.7 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 1990-07-14Temperature 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 1990-07-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -18 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
3451 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
-18 m²/s²
0-3 km storm-relative helicity
23 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 severe thunderstorm 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, Jul 13, 5:06 PM PDT, 3 hours 38 minutes before
NVZ008-009-140400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
505 PM PDT FRI JULY 13 1990

...WIDELY SCATTERED THUNDERSTORMS CONTINUE ACROSS CLARK COUNTY...

LAS VEGAS RADAR AND LIGHTNING DETECTION SENSORS INDICATED WIDELY
SCATTERED THUNDERSTORMS ACROSS CLARK COUNTY.

LITTLE MOVEMENT WAS NOTED OVER THE PAST FEW HOURS AND CURRENT
INDICATIONS ARE THAT THEY WILL PERSIST INTO THIS EVENING THEN
DISAPATE AFTER SUNSET.

SOME OF THESE THUNDERSTORMS MAY PRODUCE BRIEF HEAVY RAINS...STRONG
GUSTY WINDS...BLOWING DUST AND DEADLY LIGHTNING.

PERSONS ENGAGED IN OUTDOOR ACTIVITES IN CLARK COUNTY THE REST OF
THIS AFTERNOON AND EVENING ARE URGED TO KEEP AN EYE ON THE SKY AND
TAKE NECESSARY PRECAUTIONS WHEN THUNDERSTORMS MOVE INTO YOUR AREA.

DO NOT ATTEMPT TO CROSS FLOODED ROADWAYS.

LISTEN TO NOAA WEATHER RADIO...COMMERCIAL TELEVISION AND RADIO FOR
ADDITIONAL STATEMENTS AND FORECASTS CONCERNING THIS SITUATION.
HCB/0000Z
Special weather statement, Jul 13, 8:20 PM PDT, 24 minutes before
NVZ008-009-140800-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
805 PM PDT FRI JULY 13 1990

...WIDELY SCATTERED THUNDERSTORMS CONTINUE ACROSS CLARK COUNTY AND SOUTH
EAST LINCOLN COUNTY...

LAS VEGAS RADAR AND LIGHTNING DETECTION SENSORS INDICATED WIDELY
SCATTERED THUNDERSTORMS ACROSS CLARK AND SOUTHEAST LINCOLN COUNTIES.
THE MOST ACTIVE THUNDERSTORMS ARE IN THE LOGANDALE/MOAPA AREAS IN NORTH
EAST CLARK COUNTY.

NATIONAL PARKS SERVICE REPORTS ECHO BAY AND OVERTON BEACH HAVE WINDS
GUSTING TO 50 MPH. TEMPLE BAR HAS SOUTHEAST WINDS 20 TO 30 MPH. KATHERINES
LANDING SOUTH WINDS 10 TO 20 MPH. NO FLOODING HAS BEEN REPORTED.

SOME OF THESE THUNDERSTORMS MAY PRODUCE BRIEF HEAVY RAINS...STRONG
GUSTY WINDS...BLOWING DUST AND DEADLY LIGHTNING.
PERSONS ENGAGED IN OUTDOOR AVTIVITY IN CLARK COUNTY AND LAKE MEAD/
LAKE MOHAVE RECREATION AREAS THE REST OF TONIGHT ARE URGED TO USE EXTREME
CAUTION WHEN THUNDERSTORMS MOVE INTO YOUR AREA.

DO NOT ATTEMPT TO CROSS FLOODED ROADWAYS.

LISTEN TO NOAA WEATHER RADIO...COMMERCIAL TELEVISION AND RADIO FOR
ADDITIONAL STATEMENTS AND FORECASTS CONCERNING THIS SITUATION.
HCB/0317Z

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 13, 8:44 PM PDTFlash Flood WarningVEFClark3 hr

Nearby

Severe Thunderstorm Warnings in Nevada, 1990Every severe thunderstorm 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.