Alert archive / Nevada / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 13, NWS Las Vegas, NV

July 24, 1998Clark County, Nevada

NWS Las Vegas, NV issued this severe thunderstorm warning at Jul 24, 1998, 3:15 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: Jul 24, 1998, 3:15 PM PDT (22:15 UTC)
Expired: Jul 24, 1998, 4:15 PM PDT
In force: 60 min
Issued by: NWS Las Vegas, NV
Area: Whole counties

County Clark County, NV

What was reported inside it

Time	Report	Where	Remark
Jul 24, 3:45 PM PDT	Thunderstorm Wind 56	Las Vegas, 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.

The nearest sounding before it

Mercury/Desert R, NV (KDRA), launched 12:00Z, 10.3 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 542 J/kg
Mixed-layer CIN: -83 J/kg
Mixed-layer LCL: 1131 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 112 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

726 
WUUS1 KLAS 242216 RRA
SVRLAS
NVC003-242305-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
315 PM PDT FRI JUL 24 1998


*  SEVERE THUNDERSTORM WARNING FOR
   CENTRAL CLARK COUNTY IN SOUTHERN NEVADA

*  UNTIL 415 PM PDT

*  SOME LOCATIONS AFFECTED
   LAS VEGAS, HENDERSON, BOULDER CITY

*  AT 300 PM...RADAR INDICATED A SEVERE THUNDERSTORM NEAR
   SLOAN MOVING INTO THE SOUTH PART OF THE LAS VEGAS VALLEY.
   THIS STORM WILL MOVE THROUGH THE HENDERSON AND GREEN
   VALLEY AREA DURING THE NEXT HOUR. THIS STORM WILL LIKELY
   BE ACCOMPANIED BY WIND GUSTS IN EXCESS OF 50 MPH AND
   LOCALLY HEAVY RAIN.

MOVEMENT IS TO THE NORTHEAST AT 10 MPH.

KOSIER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 6:14 PM PDT	Flash Flood Warning	VEF	Esmeralda	116 min
Jul 23, 11:22 PM PDT	Flash Flood Warning	VEF	Clark	2 hr
Jul 24, 2:52 AM PDT	Flash Flood Warning	VEF	Clark	118 min
Jul 24, 4:49 AM PDT	Flash Flood Warning	VEF	Clark	2 hr
Jul 24, 3:21 PM PDT	Flash Flood Warning	VEF	Clark	119 min

Nearby

Severe Thunderstorm Warnings in Nevada, 1998 Every 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.