Alert archive / Nevada / Flash Flood Warnings in 1997

Flash Flood Warning 67, NWS Las Vegas, NV

September 3, 1997Clark County, Nevada

NWS Las Vegas, NV issued this flash flood warning at Sep 3, 1997, 8:14 AM PDT for Clark County, Nevada. It was in force for 2 hr. 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 3, 1997, 8:14 AM PDT (15:14 UTC)
Expired
Sep 3, 1997, 10:15 AM PDT
In force
2 hr
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 15:16 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.

The nearest sounding before it

Mercury/Desert R, NV (KDRA), launched 12:00Z, 3.2 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-pSkew-T log-p diagram, Mercury/Desert R, NV at 12:00Z on 1997-09-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Mercury/Desert R, NV at 12:00Z on 1997-09-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 37 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1037 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
37 m²/s²
0-3 km storm-relative helicity
113 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLAS 031514
FFWLAS
NVC003-031715-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
814 AM PDT WED SEP 3 1997
 
THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 1015 AM PDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS......
 
IN EXTREME SOUTHERN NEVADA
 
   ...EASTERN CLARK COUNTY
   ...INCLUDING BOULDER CITY...HENDERSON AND THE LAKE MEAD NATIONAL
      RECREATION AREA
 
AN INTENSE THUNDERSTORM WITH VERY HEAVY RAIN WAS DETECTED BY RADAR
15 MILES SOUTHWEST OF BOULDER CITY...NEAR U.S HIGHWAY 95 AND STATE
ROUTE 165. MOVEMENT WAS TO THE NORTHEAST AT 15 TO 20 MPH.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT.  MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.  DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS
THE ROADWAY.  NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL
ONE...ON FOOT.  TO ESCAPE RISING WATER MOVE UP TO HIGHER G>ROUND.

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 2, 5:03 PM PDTSevere Thunderstorm WarningVEFClark57 min
Sep 2, 6:02 PM PDTSevere Thunderstorm WarningVEFClark58 min
Sep 2, 6:07 PM PDTSevere Thunderstorm WarningVEFNye68 min
Sep 2, 7:15 PM PDTFlash Flood WarningVEFNye2 hr
Sep 2, 9:16 PM PDTFlash Flood WarningVEFNye119 min
Sep 3, 7:01 AM PDTFlash Flood WarningVEFClark59 min
Sep 3, 7:01 AM PDTSevere Thunderstorm WarningVEFClark59 min
Sep 3, 8:52 AM PDTFlash Flood WarningVEFLincoln3 hr
Sep 3, 12:10 PM PDTFlash Flood WarningVEFClark, Nye2 hr
Sep 3, 1:52 PM PDTFlash Flood WarningVEFClark, Nye3 hr

Nearby

Flash Flood Warnings in Nevada, 1997Every flash flood 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; radar from the NEXRAD Level II archive.