Alert archive / Nevada / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 32, NWS Las Vegas, NV
NWS Las Vegas, NV issued this severe thunderstorm warning at Aug 8, 1997, 4:26 PM PDT for Clark County, Nevada. It was in force for 64 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 8, 1997, 4:26 PM PDT (23:26 UTC)
- Expired
- Aug 8, 1997, 5:30 PM PDT
- In force
- 64 min
- Issued by
- NWS Las Vegas, NV
- Area
- Whole counties
County Clark County, NV
The radar
The Las Vegas radar (KESX), 58 km from the middle of the area, began a volume at 23:26 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 8, 4:39 PM PDT | Thunderstorm Wind 52 | Nellis Afb, 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, 11.4 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
- 326 J/kg
- Mixed-layer CIN
- -290 J/kg
- Mixed-layer LCL
- 3179 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -35 m²/s²
- 0-3 km storm-relative helicity
- -5 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 8, 8:23 AM PDT, 8 hours 3 minutes earlier.
Area forecast discussion, Aug 8, 8:23 AM PDT, 8 hours 3 minutes before
MOJAVE DESERT/SOUTHERN GREAT BASIN AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LAS VEGAS NV 820 AM PDT FRI AUG 8 1997 VSBL STLT AND SFC OBS INDC PLENTY OF MID LVL INSTABILITY AROUND WITH ACCAS CLDS AND EVEN SOME ISOLD -SHRA/-TSRA IN CA VCNTY KERN AND INYO COUNTIES. MEANWHILE...SHALLOW LOW LVL MSTR CONTS TO CREEP NWD UP CO RVR INTO SRN NV WITH SOME INCR IN DEWPOINTS NOTED THIS AM LAS/LSV. YUM VWP STILL INCDS ONLY A SHALLOW SLY FLOW THRU 3 KFT SO NO STRONG SURGE NOTED. DRA SOUNDING MARGINALLY UNSTABLE WITH AVG LAYER DATA SFC-700 RIPE FOR TSTM FORMATION. NO DOUBT THAT TSTMS WILL POP TDA BUT VRY DIFFICULT TO PINPOINT WHERE. UPR HIGH HAS SHIFTED SEWD AND WILL CONT TO MOVE INTO AZ TDA. THIS WILL PREVENT A REPEAT OF YSTDYS TSTMS IN AZ...WHERE THE NELY FLOW ALLOWED STORMS TO MOVE OFF HIGHER TERRAIN INTO MSTR RICH CO RVR VALLEY. 12Z RUC INDCS WEAK 7H TROF ACRS SCNTRL NV AND FCSTS IT TO MOVE SEWD INTO SRN NV BY MAX HEATING. MESO ETA ALSO CONTS TO ADVERTISE MSTR CONVERGENCE ALONG AN AXIS ROUGHLY FRM TPH TO IGM. LOOKS THE COMBO OF THE 7H TROF AND LOW LVL MSTR CONVERGENCE WILL MAKE FOR AN ACTIVE TSTM DAY OVR SCNTRL/SRN NV ZONES. PLANNING ON SOME MINOR UPDATES TO UP POPS SLGTLY AND REWORD/REGROUP FCST. LAS 211 NEMETH SRN NV...NONE ERN CA...NONE NW AZ ...NONE
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 4:26 PM PDT | Flash Flood Warning | VEF | Clark | 64 min |
Nearby
Severe Thunderstorm Warnings in Nevada, 1997Every severe thunderstorm warning in 1997
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; radar from the NEXRAD Level II archive.