Alert archive / California / Flash Flood Warnings in 2012

Flash Flood Warning 102, NWS Las Vegas, NV

August 3, 2012Inyo County, California; Nye County, Nevada

NWS Las Vegas, NV issued this flash flood warning at Aug 3, 2012, 7:13 PM PDT for Inyo County, California; Nye County, Nevada. It was in force for 2 hr. 2 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, 7:13 PM PDT (02:13 UTC)
Expired
Aug 3, 2012, 9:15 PM PDT
In force
2 hr
Issued by
NWS Las Vegas, NV
Area
Storm-based polygon
Flood severity
None

Counties Inyo County, CA, Nye County, NV

The radar

The Las Vegas radar (KESX), 155 km from the middle of the area, began a volume at 02:15 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.

What was reported inside it

TimeReportWhereRemark
Aug 3, 8:00 PM PDTFLASH FLOOD10 Ne Death Valley Junc, NVTHE NYE COUNTY SHERIFF REPORTED THAT MUD WASHED ONTO PORTIONS OF ASH MEADOWS ROAD. THE EVENT TIME IS AN ESTIMATE.
Aug 3, 8:36 PM PDTFLASH FLOOD1 Ene Death Valley Junc, CACALIFORNIA HIGHWAY PATROL REPORTED MAJOR FLOODING ALONG STATELINE ROAD EAST OF DEATH VALLEY JUNCTION.

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, 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-pSkew-T log-p diagram, Las Vegas, NV at 00:00Z on 2012-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 35 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Las Vegas, NV at 00:00Z on 2012-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -3 square meters per square second.1939Sfc1 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
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.

108 
WGUS55 KVEF 040213
FFWVEF
CAC027-NVC023-040415-
/O.NEW.KVEF.FF.W.0102.120804T0213Z-120804T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

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

* UNTIL 915 PM PDT.

* AT 702 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  VERY HEAVY RAIN FROM THUNDERSTORMS NORTHWEST OF PAHRUMP TO JUST    
  WEST OF ARMAGOSA VALLEY AND DEATH VALLEY JUNCTION. THE STORM       
  PRODUCING VERY HEAVY RAIN WAS NEARLY STATIONARY OR DRIFTING        
  SLOWLY TO THE SOUTHWEST.

* LOCATIONS IMPACTED INCLUDE...
  DEATH VALLEY JUNCTION...CALIFORNIA HIGHWAY 190 AND 127...NEVADA    
  HIGHWAY 373 AND ASH MEADOWS 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.

&&

LAT...LON 3622 11661 3640 11650 3650 11670 3661 11638
      3627 11601 3610 11622

$$

JS
2 follow-up statements
963 
WGUS75 KVEF 040328
FFSVEF

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

CAC027-NVC023-040415-
/O.CON.KVEF.FF.W.0102.000000T0000Z-120804T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
INYO CA-NYE NV-
828 PM PDT FRI AUG 3 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 PM PDT FOR SOUTH
CENTRAL NYE AND EAST CENTRAL INYO COUNTIES...

AT 816 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE THUNDERSTORMS PRODUCING MODERATE RAIN NEAR DEATH VALLEY 
JUNCTIONS. WASHES WITHIN THE WARNED AREA WILL LIKELY SEE ELEVATED 
WATER LEVELS THAT WILL SEND WATER ACROSS LOW LYING AREAS OF STATE 
ROUTES 190 AND 127 NEAR DEATH VALLEY JUNCTION THROUGH 915 PM. 

LOCATIONS IMPACTED INCLUDE...
MAINLY RURAL AREAS OF SOUTHERN NYE COUNTY.

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.

&&

LAT...LON 3622 11661 3640 11650 3650 11670 3661 11638
      3627 11601 3610 11622

$$

JS
041 
WGUS75 KVEF 040412
FFSVEF

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

CAC027-NVC023-040418-
/O.EXP.KVEF.FF.W.0102.000000T0000Z-120804T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
INYO CA-NYE NV-
912 PM PDT FRI AUG 3 2012

...THE FLASH FLOOD WARNING WILL EXPIRE AT 915 PM PDT FOR SOUTH
CENTRAL NYE AND EAST CENTRAL INYO COUNTIES...

THUNDERSTORMS HAVE DISSIPATED IN THE WARNED AREA AND THE WARNING 
WILL BE ALLOWED TO EXPIRE ON TIME. HOWEVER...ELEVATED WATER IS 
LIKELY IN AREA WASHES AND MAY STILL BE IMPACTING LOW WATER CROSSINGS 
AT VARIOUS POINTS ON STATE ROUTES 190 AND 127. DRIVERS SHOULD REMAIN 
ALERT FOR PONDING OF WATER ON THESE ROADWAYS FROM THE EARLIER RAIN 
STORMS.

LAT...LON 3622 11661 3640 11650 3650 11670 3661 11638
      3627 11601 3610 11622

$$

JS

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 3, 6:25 PM PDTSevere Thunderstorm WarningVEFInyo50 min
Aug 3, 6:29 PM PDTFlash Flood WarningVEFInyo5 hr
Aug 3, 8:42 PM PDTFlash Flood WarningVEFInyo3 hr
Aug 3, 5:00 PM PDTSevere Thunderstorm WarningVEFNye45 min
Aug 3, 5:06 PM PDTSevere Thunderstorm WarningVEFNye24 min
Aug 3, 5:26 PM PDTFlash Flood WarningVEFNye72 min
Aug 3, 5:28 PM PDTSevere Thunderstorm WarningVEFNye19 min
Aug 3, 5:48 PM PDTSevere Thunderstorm WarningVEFNye42 min
Aug 3, 5:51 PM PDTFlash Flood WarningVEFNye50 min
Aug 3, 5:56 PM PDTFlash Flood WarningVEFNye65 min
Aug 3, 5:58 PM PDTSevere Thunderstorm WarningVEFNye47 min

Nearby

Flash Flood Warnings in California, 2012Flash Flood Warnings in Nevada, 2012Every 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; radar from the NEXRAD Level II archive.