Alert archive / Nevada / Flash Flood Warnings in 2005

Flash Flood Warning 72, NWS Las Vegas, NV

October 18, 2005Clark County, Nevada

NWS Las Vegas, NV issued this flash flood warning at Oct 18, 2005, 8:52 AM PDT for Clark County, Nevada. It was in force for 113 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Oct 18, 2005, 8:52 AM PDT (15:52 UTC)
Expired
Oct 18, 2005, 10:45 AM PDT
In force
113 min
Issued by
NWS Las Vegas, NV
Area
Counties, with a storm outline in the text

County Clark County, NV

The radar

The Las Vegas radar (KESX), 71 km from the middle of the area, began a volume at 15:56 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, 3.9 hours before the alert went out and 75 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 2005-10-18Temperature 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 km15 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 2005-10-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 122 square meters per square second.19395878Sfc1 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
1070 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
122 m²/s²
0-3 km storm-relative helicity
152 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.

000 
WGUS55 KVEF 181556
FFWVEF
NVC003-181745-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
852 AM PDT TUE OCT 18 2005

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WEST CENTRAL CLARK COUNTY IN SOUTHERN NEVADA

* UNTIL 1045 AM PDT

* AT 846 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  FLASH FLOODING FROM A THUNDERSTORM ALONG HIGHWAY 160 BETWEEN MILE  
  MARKERS 10 AND 20 AND NEAR SPRING MOUNTAIN RANCH...MULTIPLE        
  THUNDERSTORMS ARE MOVING NORTH AT 20 MPH AND WILL CONTINUE TO      
  IMPACT THE SPRING MOUNTAINS IN AND AROUND HIGHWAY 160 THROUGH 10   
  AM PDT. RADAR ESTIMATES INDICATED IN EXCESS OF ONE INCH HAVE       
  FALLEN IN THE PAST HOUR WITH THE POTENTIAL FOR ANOTHER INCH        
  THROUGH 10 AM.

* THE STORM PRODUCING FLASH FLOODING WILL OTHERWISE REMAIN OVER
  MAINLY RURAL AREAS OF THE INDICATED COUNTY.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

LAT...LON 3589 11563 3598 11527 3632 11541 3617 11583

$$

SC
2 follow-up statements
000
WGUS75 KVEF 181616
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
912 AM PDT TUE OCT 18 2005

NVC003-181745-
CLARK NV-
912 AM PDT TUE OCT 18 2005

...A FLASH FLOOD WARNING CONTINUES UNTIL 1045 AM PDT FOR WEST 
CENTRAL CLARK COUNTY...

AT 905 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A THUNDERSTORM PRODUCING FLASH FLOODING OVER THE WARNED 
AREA. THIS WARNING INCLUDES HIGHWAY 160 FROM MILE MARKERS 5 THROUGH 
20...SPRING MOUNTAIN RANCH AND THE RED ROCK CANYON. EXTREMELY HEAVY 
RAINFALL AND LOW VISIBILITIES ARE OCCURRING IN THE WARNED AREA.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO RED ROCK
CANYON.

ADDITIONAL RAINFALL AMOUNTS IN EXCESS OF ONE INCH ARE POSSIBLE IN 
THE WARNED AREA.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

LAT...LON 3589 11563 3598 11527 3632 11541 3617 11583

$$

SC
000
WGUS75 KVEF 181745
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1041 AM PDT TUE OCT 18 2005

NVC003-181751-
CLARK NV-
1041 AM PDT TUE OCT 18 2005

...THE FLASH FLOOD WARNING FOR WEST CENTRAL CLARK COUNTY EXPIRES AT 
1045 AM PDT...

THE HEAVY RAINFALL HAS PUSHED NORTH OF HIGHWAY 160...RED RED ROCK 
CANYON AND THE SPRING MOUNTAINS AND THERE ARE NO ADDITIONAL REPORTS 
OF SIGNIFICANT ONGOING FLOODING. THEREFORE...THE FLASH FLOOD WARNING 
WILL BE ALLOWED TO EXPIRE AT 1045 AM PDT. HOWEVER...SHOWERS AND 
THUNDERSTORMS ARE LIKELY FOR THE REMAINDER OF THE MORNING AND INTO 
THE AFTERNOON PROVIDING THE POTENTIAL FOR ADDITIONAL FLASH FLOODING. 

LAT...LON 3589 11563 3598 11527 3632 11541 3617 11583

$$
SC

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 18, 10:26 AM PDTFlash Flood WarningVEFClark3 hr

Nearby

Flash Flood Warnings in Nevada, 2005Every flash flood warning in 2005

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.