Alert archive / Nevada / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 32, NWS Las Vegas, NV
NWS Las Vegas, NV issued this severe thunderstorm warning at Aug 30, 1998, 7:41 PM PDT for Clark County, Nye County, Nevada. It was in force for 104 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
- Aug 30, 1998, 7:41 PM PDT (02:41 UTC)
- Expired
- Aug 30, 1998, 9:25 PM PDT
- In force
- 104 min
- Issued by
- NWS Las Vegas, NV
- Area
- Whole counties
Counties Clark County, NV, Nye County, NV
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 30, 7:55 PM PDT | Thunderstorm Wind | Las Vegas, NV | High winds knocked down several power lines as thunderstorms rolled across the Las Vegas Valley. Brief power outages resulted throughout the city. |
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.
The nearest sounding before it
Mercury/Desert R, NV (KDRA), launched 00:00Z, 2.7 hours before the alert went out and 61 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
- 1125 J/kg
- Mixed-layer CIN
- -41 J/kg
- Mixed-layer LCL
- 3052 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 136 m²/s²
- 0-3 km storm-relative helicity
- 170 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.7
The text
As transmitted, in the capitals the NWS used until 2016.
216 WUUS1 KLAS 310243 RRA SVRLAS NVC003-023-310440- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING...CORRECTED TO INCLUDE WESTERN CLARK AND SOUTHERN NYE COUNTIES NATIONAL WEATHER SERVICE LAS VEGAS NV 741 PM PDT SUN AUG 30 1998 * SEVERE THUNDERSTORM WARNING FOR EXTREME SOUTHERN NYE COUNTY IN CENTRAL NEVADA CLARK COUNTY IN SOUTHERN NEVADA * UNTIL 925 PM PDT * SOME LOCATIONS AFFECTED LAS VEGAS HENDERSON BOULDER CITY PAHRUMP MERCURY MT CHARLESTON MESQUITE JEAN * AT 720 PM...RADAR INDICATED SEVERE THUNDERSTORMS OVER WESTERN CLARK COUNTY BETWEEN PAHRUMP AND MT CHARLESTON. THESE STORMS HAVE A HISTORY OF PRODUCING SEVERE WEATHER IN THE PAHRUMP AREA. THE STORMS WERE MOVING TO THE EAST AT 15 SHPULD MOVE INTO THE LAS VEGAS METRO AREA DURING THE NEXT HOUR. STRONG DAMAGING WINDS ARE LIKELY WITH THIS STORM. IF YOU ARE CAUGHT OUTSIDE...SEEK REFUGE FROM THE STORM IN A STRONG BUILDING. BOATERS ON AREA LAKES SHOULD TAKE SHELTER. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...AND DANGEROUS LIGHTNING ARE ALL LIKELY. DO NOT SEEK SHELTER UNDER TREES OR OTHER ISOLATED TALL O0BJECTS. THESE ATTRACT LIGHTNING. DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. KOSIER
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.
NWS Las Vegas, NV wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 30, 2:20 PM PDT, 5 hours 21 minutes earlier.
Area forecast discussion, Aug 30, 2:20 PM PDT, 5 hours 21 minutes before
MOJAVE DESERT/SOUTHERN GREAT BASIN AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LAS VEGAS NV 220 PM PDT SUN AUG 30 1998 SYNOPSIS...LOW LEVEL MOISTURE WILL REMAIN ACROSS THE SOUTHERN GREAT BASIN AND MOJAVE DESERT THROUGH THE EARLY PART OF THIS WEEK. THIS WILL RESULT IN A CHANCE FOR AFTERNOON AND EVENING THUNDERSTORMS EACH DAY. AT THE SAME TIME...A RIDGE OF HIGH PRESSURE WILL REMAIN OVER THE AREA KEEPING TEMPERATURES WARMER THAN NORMAL. DISCUSSION...SATELLITE AND RADAR DETECTING ISOLATED/SCATTERED SHOWERS AND THUNDERSTORMS ACROSS THE REGION. THUNDERSTORMS HUGGING CLOSE TO THE HIGHER TERRAIN CURRENTLY WITH ANVIL BLOWOFF STREAMING TO THE EAST-SOUTHEAST. LOCALLY HEAVY RAIN GREATEST POTENTIAL AND CONTINUALLY MONITORING POSSIBLE NEED FOR ADVISORY OR WATCH. SHORT WAVE TROUGH MOVING INTO THE NORTHERN GREAT BASIN ADDING ADDITIONAL LIFT TO EAST CENTRAL NEVADA. DYNAMICS FROM SHORT WAVE SHIFT EAST MONDAY BUT LOW LEVEL MOISTURE AND COOLER AIR ALOFT WILL PRODUCE ANOTHER DAY OF ISOLATED/SCATTERED SHOWERS AND THUNDERSTORMS. HIGH CENTER RETROGRADES OFF THE WEST COAST TUESDAY WITH DRIER/WARMER AIR ALOFT SPREADING BACK INTO THE NORTHWEST PORTION OF THE FORECAST AREA. THIS ONLY TREND I COULD LATCH ONTO SO SHOWING AM SCALING BACK AREAL COVERAGE ON TUESDAY. MEDIUM RANGE MODELS OFFERING ANY NUMBER OF SOLUTIONS. BUT WILL BRING DRYING TREND ALL THE WAY INTO SOUTHERN NEVADA THURSDAY AND FRIDAY. LAS 3221. PIERCE
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 5:30 PM PDT | Flash Flood Warning | VEF | Lincoln | 3 hr |
| Aug 30, 6:34 PM PDT | Severe Thunderstorm Warning | VEF | Clark, Nye | 61 min |
| Aug 30, 7:25 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 2 hr |
| Aug 30, 10:06 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 39 min |
Nearby
Severe Thunderstorm Warnings in Nevada, 1998Every severe thunderstorm warning in 1998
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.