Alert archive / Arizona / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 71, NWS Las Vegas, NV
NWS Las Vegas, NV issued this severe thunderstorm warning at Sep 2, 1997, 5:03 PM MST for Mohave County, Arizona; Clark County, Nevada. It was in force for 57 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 2, 1997, 5:03 PM MST (00:03 UTC)
- Expired
- Sep 2, 1997, 6:00 PM MST
- In force
- 57 min
- Issued by
- NWS Las Vegas, NV
- Area
- Whole counties
Counties Mohave County, AZ, Clark County, NV
The nearest sounding before it
Mercury/Desert R, NV (KDRA), launched 00:00Z, 0.1 hours before the alert went out and 162 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
- 20 J/kg
- Mixed-layer CIN
- -38 J/kg
- Mixed-layer LCL
- 2671 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 81 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 030007 RRA SVRLAS AZC015-NVC003-030100- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 503 PM PDT (503 PM MST) TUE SEP 2 1997 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 600 PM PDT (600 PM MST) FOR PEOPLE IN THE FOLLOWING LOCATIONS...S... IN NORTHWEST ARIZONA ...WEST CENTRAL MOHAVE COUNTY IN SOUTH NEVADA ...EAST CENTRAL CLARK COUNTY THIS INCLUDES THE LAKE MEAD NATIONAL RECREATION AREA. AT 500 PM...LAS VEGAS DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER WEST CENTRAL MOHAVE COUNTY ABOUT 10 MILES NORTH OF DOLAN SPRINGS. MOVEMENT OF THIS STORM WAS TO THE NORTHWEST AT 15 MPH AND WILL LIKELY MOVE OVER THE LAKE MEAD AREA BETWEEN CALVILLE BAY AND TEMPLE BAR DURING THE NEXT HOUR. THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE FOR DAMAGING WIND IN EXCESS OF 55 MPH...LARGE HAIL...AND DEADLY LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING BUT STAY AWAY FROM WINDOWS. 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 Sep 2, 2:07 PM MST, 2 hours 56 minutes earlier.
Area forecast discussion, Sep 2, 2:07 PM MST, 2 hours 56 minutes before
MOJAVE DESERT/SOUTHERN GREAT BASIN AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LAS VEGAS NV 205 PM PDT TUE SEP 2 1997 RADAR AND STLT BOTH INDICATE MOST OF FCST AREA CONVECTION-FREE WITH EXCEPTION OF ERN SLOPES OF SIERRA NEVADA. SEVERAL FACTORS LIKELY INHIBITING T-STORM DEVELOPMENT THIS AFTERNOON. TEMPS AT 21Z STILL ONLY IN LOWER 80S OVER SRN NV WHICH IS STILL WELL BELOW CONVECTIVE TEMPS. RAINFALL FROM LAST NIGHT ALSO LIKELY STABILIZED LOWER LAYERS TO SOME DEGREE AND CAPPING INVERSION AT 6OO MB ALSO A FACTOR. WITH ALL THAT SAID...WILL TRIM PRECIP CHANCE A CATEGORY OR TWO FOR TONIGHT INTO ISOLD OR SCT. ALL MDLS SHOW LITTLE CHG FOR THE NEXT FEW DAYS WITH FCST AREA REMAINING UNDER A MOIST SOUTHEAST FLOW WITH UNSTBL CONDS CONTINUING WITH FCST LI VALUES IN THE 0 TO -2 CATEGORY. THEREFORE...WILL CONTINUE BROAD-BRUSH APPROACH WITH SCT POPS FOR MOST AREAS THROUGH THU. LONGER RANGE MDLS CONTINUE TO BRING TROUGH ALONG WEST COAST OVER THE WEEKEND WHICH SHOULD BRING A DRIER SOUTHWEST FLOW THEREBY CUTTING OFF T-STORMS CHANCES. LAS 2332. KOSIER 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 |
|---|---|---|---|---|
| Sep 2, 6:02 PM MST | Severe Thunderstorm Warning | VEF | Mohave | 58 min |
| Sep 2, 7:12 PM MST | Severe Thunderstorm Warning | VEF | Mohave | 63 min |
| Sep 2, 6:07 PM MST | Severe Thunderstorm Warning | VEF | Nye | 68 min |
| Sep 2, 7:15 PM MST | Flash Flood Warning | VEF | Nye | 2 hr |
| Sep 2, 9:16 PM MST | Flash Flood Warning | VEF | Nye | 119 min |
| Sep 3, 7:01 AM MST | Flash Flood Warning | VEF | Clark | 59 min |
| Sep 3, 7:01 AM MST | Severe Thunderstorm Warning | VEF | Clark | 59 min |
| Sep 3, 8:14 AM MST | Flash Flood Warning | VEF | Clark | 2 hr |
| Sep 3, 8:52 AM MST | Flash Flood Warning | VEF | Lincoln | 3 hr |
| Sep 3, 12:10 PM MST | Flash Flood Warning | VEF | Clark, Nye | 2 hr |
| Sep 3, 1:52 PM MST | Flash Flood Warning | VEF | Clark, Nye | 3 hr |
Nearby
Severe Thunderstorm Warnings in Arizona, 1997Severe 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; the sounding from the Mesonet's radiosonde archive.