Alert archive / Nevada / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 1, NWS Las Vegas, NV
NWS Las Vegas, NV issued this severe thunderstorm warning at Aug 21, 1986, 2:50 PM PDT for Clark County, Nevada. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Aug 21, 1986, 2:50 PM PDT (21:50 UTC)
- Expired
- Aug 21, 1986, 5:00 PM 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 12:00Z, 9.8 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.
- Mixed-layer CAPE
- 83 J/kg
- Mixed-layer CIN
- -249 J/kg
- Mixed-layer LCL
- 2279 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 91 m²/s²
- 0-3 km storm-relative helicity
- 130 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KLAS 212204 COR SVRLAS NVC003-220000- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERES THUNDERSTORMS WARNING...CORRECTED NATIONAL WEATHER SERVICE LAS VEGAS NV 250 PM PDT THU AUG 21 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVER THUNDERSTORMS WARNING E EFFECTIVE UNTIL 5 PM FOR THE PEOPLE IN THE FOLLOWING COUNTIES OF NEVADA...SOUTHEAST CLARK AT 245 PM WEATHER RADAR AT LAS VEGAS SHOWED A SEVERE THUNDERSTORM LOCATED 27 MILES SOUTHEAST OF LAS VEGAS MOVING NORTHEAST AT 20 MPH. PEOPLE IN THE PATH OF THE THUNDERSTORM ARE URGED TO SEEK SHELTER IMMEDIATELY. THUNDERSTORMS CAN..AND LIKELY WILL PRODUCE STRONG GUSTY WINDS..DANGEROUS LIGHTNING..HEAVY RAIN AND AREAS OF BLOWING DUST THAT WILL REDUCE VISIBILITY TO NEAR ZERO. BOATERS ON LAKE MEAD AND LAKE MOHAVE SHOULD TAKE THE NECESSARY PRECAUTIONS IMMEDIATELY. . CONTINUE TO LISTEN TO THIS STATION FOR FURTHER STATEMENTS OR WARNINGS. WHEN YOUR ARE SURE IT IS SAFE TO DO SO..RELAY REPORTS OF SEVERE WEATHERF TO LOCAL LAW ENFORCEMENT PERSONNEL. GRT/2155Z
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, Aug 21, 2:00 PM PDT, 50 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS, NV 200 PM PDT THU AUG 21 1986 ...THUNDERSTORMS DEVELOPING IN SOUTHERN NEVADA AGAIN TODAY... AT 200 PM WEATHER RADAR AT LAS VEGAS SHOWED WIDELY SCATTERED THUNDER- STORMS BEGINNING TO DEVELOPE THROUGHOUT LINCOLN AND CLARK COUNTIES OF NEVADA THIS AFTERNOON. SOME OF THE STRONGEST THUNDERSTORMS WERE LOCATED ALONG U.S. 93 25 MILES SOUTH OF ALAMO AND 20 MILES EAST OF CALIENTE CLOSE TO THE UTAH BORDER. THESE THUNDERSTORMS WERE MOVING NORTHEAST AT ABOUT 20 MPH. MOIST TROPICAL AIR REMAINS OVER SOUTHERN NEVADA AND AS THE MAXIMUM AFTERNOON HEATING TIME APPROACHES THESE THUNDERSTORMS CAN BE EXPECTED TO BECOME MORE NUMEROUS. THESE THUNDERSTORMS CAN..AND LIKELY WILL..PRODUCE STRONG GUSTY WINDS.. DANGEROUS LIGHTNING..HEAVY RAIN..AND AREA OF BLOWING DUST THAT REDUCE VISIBILITY TO NEAR ZERO IN PLACES. . PERSONS IN SOUTHERN NEVADA SHOULD REMAIN ALERT FOR RAPIDLY CHANGING WEATHER CONDIT IONS. DRIVERS APPROACHING AREAS OF HEAVY RAIN.. ESPECTALLY DRIVERS OF HIGH PROFILE VEHICLES ARE URGED TO USE CAUTION. LISTEN TO COMMERCIAL RADIO..TELEVISION OR NOAA WEATHER RADIO FOR LATER FORECAST AND STATEMENTS. GRT/2100Z
Nearby
Severe Thunderstorm Warnings in Nevada, 1986Every severe thunderstorm warning in 1986
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.