Severe Thunderstorm Warning 4, NWS Las Vegas, NV

Issued

Jul 19, 1998, 11:39 PM MST (06:39 UTC)

Expired

Jul 20, 1998, 1:00 AM MST

In force

81 min

Issued by

NWS Las Vegas, NV

Area

Whole counties

Counties Mohave County, AZ, Clark County, 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.

000 
TTAA00 KLAS 200640 RRA
SVRLAS
AZC015-NVC003-200800-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
1139 PM PDT (1139 PM MST) SUN JUL 19 1998

*  SEVERE THUNDERSTORM WARNING FOR
   EASTERN CLARK COUNTY IN SOUTHERN NEVADA
   WEST CENTRAL MOHAVE COUNTY IN NORTHWESTERN ARIZONA

*  UNTIL 100 AM PDT (100 AM MST)

*  SOME LOCATIONS AFFECTED
   LAS VEGAS METROPOLITAN AREA INCLUDING NORTH LAS VEGAS...
   HENDERSON...BOULDER CITY...LAS VEGAS.  ALSO LAKE MEAD NATIONAL
   RECREATION AREA INCLUDING CALLVILLE BAY...TEMPLE BAR...THE
   OVERTON ARM...LAS VEGAS BAY...AND BOULDER BEACH.  AND THE TOWNS
   OF MOAPA...GLENDALE...LOGANDALE...AND OVERTON.

*  AT 1135 PM PDT/MST RADAR INDICATED A CLUSTER OF SEVERE
   THUNDERSTORMS OVER NORTHEAST CLARK COUNTY ABOUT 15 MILES
   NORTHEAST OF LAS VEGAS.  THESE STORMS WERE MOVING AND
   DEVELOPING TO THE SOUTHWEST AT 20 TO 25 MPH.

STRONG DAMAGING WINDS IN EXCESS OF 60 MPH ARE LIKELY WITH THIS
STORM.  THIS WILL CAUSE AREAS OF LOW VISIBILITY FROM BLOWING DUST
AND CONSIDERING DEBRIS.  THIS WIND WILL THEN BE FOLLOWED BY LOCAL
HEAVY RAIN CAUSING SOME FLOODING OF LOWER AREAS.

MCQUEEN

NWS Las Vegas, NV wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 19, 2:11 AM MST, 21 hours 28 minutes earlier.

MOJAVE DESERT/SOUTHERN GREAT BASIN AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
900 AM PDT SUN JUL 19 1998

SYNOPSIS...THE UPPER LEVEL HIGH PRESSURE SYSTEM JUST NORTHEAST OF LAS
VEGAS WILL MOVE SLOWLY EAST TOWARD THE 4-CORNERS AREA BY MONDAY.
THIS WILL ALLOW FOR A GRADUAL INCREASE IN MONSOONAL MOISTURE ACROSS
THE MOJAVE DESERT AND SOUTHERN GREAT BASIN LEADING TO A BETTER CHANCE
OF LATE DAY THUNDERSTORMS EARLY THIS WEEK.

DISCUSSION...MID AND UPPER LEVEL MOISTURE HAD INCREASED CONSIDERABLY
ACROSS THE CWA OVER THE LAST 24 HOURS PER WATER VAPOR LOOP. 12Z DRA
SOUNDING REFLECTED THIS INCREASE AS WELL AS AN INCREASE IN LOW LEVEL
MOISTURE...WHICH WAS SURGING NORTH ALONG THE COLORADO RIVER VALLEY.
INVERTED-V TYPE PROFILE WILL LEAVE THE REGION SUSCEPTIBLE TO STRONG
DOWNBURST WINDS FROM THE THUNDERSTORMS WHICH DEVELOP THIS AFTERNOON
AND EVENING. WILL CONTINUE WITH SCATTERED COVERAGE ACROSS MOST OF
MOHAVE COUNTY WHERE CAPES RISE TO AS MUCH AS 1000 J/KG LATER THIS
AFTERNOON AND LIFTED INDICES DROP TO -2. WITH INSTABILITY AND LOW
LEVEL MOISTURE ONLY MARGINAL ACROSS A GOOD PORTION OF SOUTHERN
NEVADA...WILL LEAVE POPS IN THE ISOLATED CATEGORY...MAINLY OVER THE
MOUNTAINS. CURRENT FORECAST LOOKS IN GOOD SHAPE. NO CHANGES NEEDED AT
THIS TIME.

LAS 111. MATUSIEWICZ

Severe Thunderstorm Warnings in Arizona, 1998Severe Thunderstorm Warnings in Nevada, 1998Every severe thunderstorm warning in 1998

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.