Alert archive / California / Flash Flood Warnings in 2004

Flash Flood Warning 10, NWS Las Vegas, NV

August 15, 2004Clark County, Nevada; Inyo County, San Bernardino County, California

NWS Las Vegas, NV issued this flash flood warning at Aug 15, 2004, 3:16 AM PDT for Clark County, Nevada; Inyo County, San Bernardino County, California. It was in force for 28 days. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 15, 2004, 3:16 AM PDT (10:16 UTC)
Expired: Sep 11, 2004, 7:15 PM PDT
In force: 28 days
Issued by: NWS Las Vegas, NV
Area: Counties, with a storm outline in the text

Counties Inyo County, CA, San Bernardino County, CA, Clark County, NV

The nearest sounding before it

Mercury/Desert R, NV (KDRA), launched 00:00Z, 10.3 hours before the alert went out and 104 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: 8 J/kg
Mixed-layer CIN: -106 J/kg
Mixed-layer LCL: 2877 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 9 m²/s²
0-3 km storm-relative helicity: 67 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 151021
FFWVEF
CAC027-151215-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
316 AM PDT SUN AUG 15 2004

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAST CENTRAL INYO COUNTY IN EASTERN CALIFORNIA

* UNTIL 515 AM PDT

* AT 306 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  AN AREA OF THUNDERSTORMS WITH VERY LITTLE MOVEMENT PRODUCING HEAVY 
  RAIN OVER ALONG THE DAYLIGHT PASS ROAD AND JUST EAST OF HIGHWAY 
  190 AND THE ROAD TO SCOTTYS CASTLE IN DEATH VALLEY. WATER AND 
  DEBRIS WILL LIKELY BE FLOWING OVER THESE ROADWAYS.

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

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

LAT...LON 3687 11736 3656 11698 3670 11683 3698 11722

$$

HARRISON

1 follow-up statement

000 
WGUS55 KVEF 120020
FFWVEF
CAC071-NVC003-120215-
/X.NEW.KVEF.FF.W.0010.040912T0019Z-040912T0215Z/
/0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
519 PM PDT SAT SEP 11 2004

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EXTREME NORTH CENTRAL SAN BERNARDINO COUNTY IN SOUTHEAST CALIFORNIA
  SOUTHWEST CLARK COUNTY IN SOUTHERN NEVADA
  THIS INCLUDES SANDY VALLEY AND JEAN

* UNTIL 715 PM PDT

* AT 515 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM A THUNDERSTORM 8 MILES SOUTHWEST OF
  GOODSPRINGS...OR ABOUT 12 MILES WEST OF JEAN...MOVING NORTHEAST AT
  10 MPH.

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

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.

IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS
FLOODED ROADS. FIND ALTERNATE ROUTES. IT ONLY TAKES A FEW INCHES OF
SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY.

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN LAS
VEGAS.

LAT...LON 3573 11572 3564 11563 3576 11530 3588 11547

$$

RUNK

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 15, 12:15 PM PDT	Flash Flood Warning	VEF	Clark, Nye	27 days
Aug 14, 6:11 PM PDT	Severe Thunderstorm Warning	VEF	San Bernardino	34 min
Aug 14, 6:23 PM PDT	Flash Flood Warning	VEF	San Bernardino	28 days
Aug 14, 8:10 PM PDT	Severe Thunderstorm Warning	VEF	San Bernardino	35 min
Aug 15, 11:04 AM PDT	Severe Thunderstorm Warning	VEF	San Bernardino	41 min
Aug 15, 11:14 AM PDT	Flash Flood Warning	VEF	San Bernardino	27 days
Aug 15, 1:28 PM PDT	Severe Thunderstorm Warning	VEF	San Bernardino	47 min
Aug 15, 1:33 PM PDT	Severe Thunderstorm Warning	VEF	San Bernardino	42 min
Aug 15, 3:07 PM PDT	Flash Flood Warning	VEF	San Bernardino	113 min

Nearby

Flash Flood Warnings in California, 2004 Flash Flood Warnings in Nevada, 2004 Every flash flood warning in 2004

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.