Alert archive / Nevada / Flash Flood Warnings in 2004

Flash Flood Warning 34, NWS Las Vegas, NV

September 11, 2004Clark County, Nye County, Nevada; Inyo County, San Bernardino County, California

NWS Las Vegas, NV issued this flash flood warning at Sep 11, 2004, 7:14 PM PDT for Clark County, Nye County, Nevada; Inyo County, San Bernardino County, California. It was in force for 91 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: Sep 11, 2004, 7:14 PM PDT (02:14 UTC)
Expired: Sep 11, 2004, 8:45 PM PDT
In force: 91 min
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, Nye County, NV

The radar

The Las Vegas radar (KESX), 86 km from the middle of the area, began a volume at 02:14 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 00:00Z, 2.2 hours before the alert went out and 80 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: 378 J/kg
Mixed-layer CIN: -88 J/kg
Mixed-layer LCL: 2807 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: -34 m²/s²
0-3 km storm-relative helicity: -23 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 120217
FFWVEF
CAC027-071-NVC003-023-120345-
/X.NEW.KVEF.FF.W.0012.040912T0214Z-040912T0345Z/
/0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A 

* FLASH FLOOD WARNING FOR...
  EXTREME SOUTHEASTERN INYO COUNTY IN EASTERN CALIFORNIA
  EXTREME SOUTH CENTRAL NYE COUNTY IN SOUTH CENTRAL NEVADA
  EXTREME NORTH CENTRAL SAN BERNARDINO COUNTY IN SOUTHEAST CALIFORNIA
  WEST CENTRAL CLARK COUNTY IN SOUTHERN NEVADA

* UNTIL 845 PM PDT

* AT 704 PM PDT...THUNDERSTORMS PRODUCING HEAVY RAINFALL CONTINUE   
  AROUND SANDY VALLEY EXTENDING NORTHWEST NEAR THE OLD SPANISH       
  TRIAL HIGHWAY BETWEEN STATE ROUTE 160 AND TECOPA. 

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.

LAT...LON 3598 11603 3567 11564 3586 11545 3612 11588

$$

PIERCE

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 11, 5:19 PM PDT	Flash Flood Warning	VEF	Clark	116 min
Sep 11, 9:16 PM PDT	Flash Flood Warning	VEF	Clark	119 min
Sep 11, 5:03 PM PDT	Severe Thunderstorm Warning	VEF	San Bernardino	42 min
Sep 11, 5:31 PM PDT	Flash Flood Warning	VEF	San Bernardino	3 hr

Nearby

Flash Flood Warnings in Nevada, 2004 Flash Flood Warnings in California, 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; radar from the NEXRAD Level II archive.