Alert archive / Nevada / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 3, NWS Las Vegas, NV
NWS Las Vegas, NV issued this severe thunderstorm warning at Sep 4, 1987, 5:30 PM PDT for Clark County, Nevada. It was in force for 60 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Sep 4, 1987, 5:30 PM PDT (00:30 UTC)
- Expired
- Sep 4, 1987, 6:30 PM PDT
- In force
- 60 min
- 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 4, 6:00 PM PDT | Thunderstorm Wind 52 | Clark, NV |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Mercury/Desert R, NV (KDRA), launched 00:00Z, 0.5 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
- 21 J/kg
- Mixed-layer CIN
- -40 J/kg
- Mixed-layer LCL
- 3558 m above ground
- 0-6 km bulk shear
- 2 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- -35 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 050030
SVRLAS
AZC015-NVC003-050130-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
530 PM PDT FRI SEP 4 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 630 PM PDT FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN NORTHWEST ARIZONA
...EXTREME NORTHWEST MOHAVE
IN SOUTHERN NEVADA
...SOUTHEASTERN CLARK
THE SEVERE THUNDERSTORM WARNING INCLUDES THE TOWNS OF SEARCHLIGHT
AND LAUGHLIN..NEVADA. THIS ALSO INCLUDES LAKE MEAD AND LAKE MOHAVE.
THIS WARNING DOES NOT INCLUDE THE GREATER LAS VEGAS AREA.
RADAR SHOWS A LINE OF THUNDERSTORMS FROM CENTRAL LAKE MEAD SOUTHWEST
TO SEARCHLIGHT. THE LINE WAS PRODUCING HEAVY RAIN AND GUSTY WINDS
OVER 45 MPH. IT WILL AFFECT BOATERS ON LAKE MOHAVE AND LAKE MEAD
AS WELL AS RESIDENTS OF EXTREME SOUTHEAST CLARK COUNTY FOR THE
NEXT HOUR.
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.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, Sep 4, 3:35 PM PDT, 1 hour 55 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS, NV 335 PM PDT FRI SEP 04 1987 ...THUNDERSTORMS DEVELOPING OVER SOUTHERN NEVADA... AT 315 PM WEATHER RADAR IN LAS VEGAS SHOWED A RAPID INCREASE IN THUNDERSTORMS OVER THE SOUTHERN HALF OF NEVADA. SOME OF THE STORMS WERE MODERATE TO HEAVY IN INTENSITY. MOVEMENT WAS NORTHEAST AT 20 MPH. SCATTERED THUNDERSTORMS ARE LIKELY DURING THE NEXT FEW HOURS OVER MOST OF SOUTHERN NEVADA INCLUDING THE LAS VEGAS AREA. DANGEROUS LIGHTNING...GUSTY WINDS TO 40 MPH AND BRIEF HEAVY RAIN IS POSSIBLE THIS EVENING. BOATERS ON LAKE MEAD ARE REMINDED A LAKE WIND ADVISORY HAS BEEN PUT INTO EFFECT FOR THIS EVENING DUE TO GUSTY WINDS AROUND THUNDERSTORM6S. SKIES SHOULD CLEAR LATER TONIGHT. STAY TUNED TO THIS STATION FOR LATER STATEMENTS. SDB/2235Z
Local storm report, Sep 4, 4:59 PM PDT, 31 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS, NV
457 PM PDT FRI SEP 04 1987
TIME EVENT
415 PM PDT SPOTTER IN HENDERSON, NV REPORTS WIND GUSTS
TO 58 MPH. ALSO.. 0.04 INCHES RAIN IN 40 MIN.
420 PM PDT HENDERSON POLICE AND NEVADA HIGHWAY PATROL
REPORT INTERSECTION OF SUNSET AND BOULDER
HIGHWAY FLODDED AND IMPASSABLE..CREWS ON THE
SCENE. ALSO..HAIL REPORTED IN THE GREEN
VALLEY AREA.Nearby
Severe Thunderstorm Warnings in Nevada, 1987Every severe thunderstorm warning in 1987
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.