Alert archive / California / Flash Flood Warnings in 2012

Flash Flood Warning 103, NWS Las Vegas, NV

August 3, 2012Inyo County, California

NWS Las Vegas, NV issued this flash flood warning at Aug 3, 2012, 8:42 PM PDT for Inyo County, California. It was in force for 3 hr. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 3, 2012, 8:42 PM PDT (03:42 UTC)
Expired: Aug 3, 2012, 11:16 PM PDT
In force: 3 hr
Issued by: NWS Las Vegas, NV
Area: Storm-based polygon
Flood severity: None

County Inyo County, CA

What was reported inside it

Time	Report	Where	Remark
Aug 3, 9:00 PM PDT	FLASH FLOOD	16 Wsw Death Valley Jun, CA	THE PARK SERVICE REPORTED SEVERAL AREAS OF DANTES VIEW ROAD WASHED OUT. THE EVENT TIME IS AN ESTIMATE.
Aug 3, 9:30 PM PDT	FLASH FLOOD	10 S Furnace Creek, CA	THE PARK SERVICE REPORTED BADWATER ROAD HAD DEBRIS ON THE ROAD FROM MILE POST 8 TO 15. IN ADDITION NATURAL BRIDGE ROAD...DEVILS GOLF COURSE AND 20 MULE TEAM ROAD WERE CLOSED DUE TO WASHOUTS. THE EVENT TIME IS AN ESTIMATE.
Aug 3, 11:00 PM PDT	FLASH FLOOD	9 N Panamint Raws, CA	MUD AND DEBRIS WASHED ONTO THE PAVED ROAD TO THE CHARCOAL KILNS IN DEATH VALLEY NATIONAL PARK. THE EVENT TIME IS AN ESTIMATE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Las Vegas, NV (KVEF), launched 00:00Z, 3.7 hours before the alert went out and 146 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: 35 J/kg
Mixed-layer CIN: -98 J/kg
Mixed-layer LCL: 3971 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 10 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.

689 
WGUS55 KVEF 040342
FFWVEF
CAC027-040630-
/O.NEW.KVEF.FF.W.0103.120804T0342Z-120804T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
842 PM PDT FRI AUG 3 2012

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

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

* UNTIL 1130 PM PDT.

* AT 825 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  VERY HEAVY RAIN FROM THUNDERSTORMS OVER A WIDE AREA OF             
  DEATH VALLEY STATE PARK. IN ADDITION TO AREAS OF CONCERN IN        
  EARLIER WARNINGS...NUMEROUS THUNDERSTORM STORM CELLS WERE          
  PRODUCING VERY HEAVY RAIN OVER BADWATER ROAD AND WEST SIDE ROAD    
  SOUTH OF STATE ROUTE 190 AND WILD ROSE ROAD SOUTHEAST OF PANAMINT  
  SPRINGS. HEAVY RAIN WAS ALSO FALLING NEAR PANAMINT SPRINGS AND     
  PANAMINT VALLEY ROAD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON
AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE
RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED
ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN!

REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL
WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG...
NWSVEGAS.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS EVEN HARDER TO SEE WATER
COVERING THE ROADWAY OR IN LOW WATER CROSSINGS.

&&

LAT...LON 3584 11710 3634 11771 3655 11723 3620 11660

$$

JS

1 follow-up statement

740 
WGUS75 KVEF 040616
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1116 PM PDT FRI AUG 3 2012

CAC027-040625-
/O.CAN.KVEF.FF.W.0103.000000T0000Z-120804T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
INYO CA-
1116 PM PDT FRI AUG 3 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CENTRAL INYO
COUNTY...

THUNDERSTORMS HAVE DISSIPATED AND RAIN HAS ENDED. THE THREAT OF 
ADDITIONAL FLOODING IS NOT ANTICIPATED.
 
LAT...LON 3584 11710 3634 11771 3655 11723 3620 11660

$$

JS

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 3, 6:25 PM PDT	Severe Thunderstorm Warning	VEF	Inyo	50 min
Aug 3, 6:29 PM PDT	Flash Flood Warning	VEF	Inyo	5 hr
Aug 3, 7:13 PM PDT	Flash Flood Warning	VEF	Inyo	2 hr

Nearby

Flash Flood Warnings in California, 2012 Every flash flood warning in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.