Alert archive / California / Flash Flood Warnings in 2011

Flash Flood Warning 68, NWS Las Vegas, NV

July 31, 2011Inyo County, California

NWS Las Vegas, NV issued this flash flood warning at Jul 31, 2011, 2:34 PM PDT for Inyo County, California. It was in force for 56 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: Jul 31, 2011, 2:34 PM PDT (21:34 UTC)
Expired: Jul 31, 2011, 3:30 PM PDT
In force: 56 min
Issued by: NWS Las Vegas, NV
Area: Storm-based polygon
Flood severity: None

County Inyo County, CA

The nearest sounding before it

Las Vegas, NV (KVEF), launched 12:00Z, 9.6 hours before the alert went out and 132 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: -233 J/kg
Mixed-layer LCL: 2632 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 20 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.

626 
WGUS55 KVEF 312134
FFWVEF
CAC027-312230-
/O.NEW.KVEF.FF.W.0068.110731T2134Z-110731T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
234 PM PDT SUN JUL 31 2011

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

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

* UNTIL 330 PM PDT.

* AT 224 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  HEAVY RAIN FROM A THUNDERSTORM NEAR TEXAS SPRINGS CAMPGROUND...OR
  NEAR FURNACE CREEK. THE STORM PRODUCING HEAVY RAIN WAS NEARLY
  STATIONARY.

* LOCATIONS IMPACTED INCLUDE...FURNACE CREEK AND TEXAS SPRINGS
  CAMPGROUND. ALSO INCLUDED ARE PORTIONS OF HIGHWAY 190 AND SCOTTYS
  CASTLE ROAD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLASH FLOODING IS EXPECTED ON AREA ROADWAYS...AROUND UNDERPASSES...
AND IN NORMALLY DRY WASHES AND LOW LYING AREAS. FLASH FLOODING IS
NATURES NUMBER ONE KILLER. 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 TWITTER #NWSVEGAS.

CAMPERS AND HIKERS SHOULD BE ALERT TO THE POSSIBILITY OF RAPIDLY
RISING WATER AND BE PREPARED TO MOVE QUICKLY TO HIGHER GROUND IF
FLASH FLOODING IS OBSERVED.

&&

LAT...LON 3671 11723 3689 11711 3657 11673 3645 11674
      3641 11683

$$

JENSEN

2 follow-up statements

012 
WGUS75 KVEF 312149
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
249 PM PDT SUN JUL 31 2011

CAC027-312230-
/O.CON.KVEF.FF.W.0068.000000T0000Z-110731T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
INYO CA-
249 PM PDT SUN JUL 31 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 330 PM PDT FOR
CENTRAL INYO COUNTY...

AT 233 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE THAT DISSIPATING THUNDERSTORMS ON THE WEST SLOPES OF THE
AMARGOSA MOUNTAINS...EAST OF HIGHWAY 190 AND SCOTTYS CASTLE ROAD ARE 
LIKELY PRODUCING HEAVY RAINFALL. THIS WATER WILL FLOW ACROSS THE 
ROADWAYS...WITH MUD AND DEBRIS LIKELY INCLUDED. PERSONS TRAVELING ON 
THESE ROADS...NORTH OF FURNACE CREEK SHOULD BE ESPECIALLY 
CAUTIOUS...WHILE HIKERS IN THE AMARGOSA RANGE ARE URGED TO KEEP AN 
EYE ON THE WEATHER.

LOCATIONS IMPACTED INCLUDE...FURNACE CREEK AND TEXAS SPRINGS 
CAMPGROUND. ALSO IMPACTED ARE HIGHWAY 190 AND SCOTTYS CASTLE 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!

CAMPERS AND HIKERS SHOULD BE ALERT TO THE POSSIBILITY OF RAPIDLY 
RISING WATER AND BE PREPARED TO MOVE QUICKLY TO HIGHER GROUND IF 
FLASH FLOODING IS OBSERVED.

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

&&

LAT...LON 3671 11723 3689 11711 3657 11673 3645 11674
      3641 11683

$$

JENSEN

688 
WGUS75 KVEF 312225
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
325 PM PDT SUN JUL 31 2011

CAC027-312234-
/O.EXP.KVEF.FF.W.0068.000000T0000Z-110731T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
INYO CA-
325 PM PDT SUN JUL 31 2011

...THE FLASH FLOOD WARNING WILL EXPIRE AT 330 PM PDT FOR CENTRAL INYO
COUNTY...

THERE HAVE BEEN NO REPORTS OF FLOODING IN THE WARNING AREA AND 
RAINFALL HAS DECREASED SIGNIFICANTLY. 

LAT...LON 3671 11723 3689 11711 3657 11673 3645 11674
      3641 11683

$$

JH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 5:12 PM PDT	Severe Thunderstorm Warning	VEF	Inyo	22 min
Jul 30, 5:21 PM PDT	Flash Flood Warning	VEF	Inyo	74 min
Jul 30, 5:27 PM PDT	Areal Flood Advisory	VEF	San Bernardino	61 min
Jul 31, 2:48 AM PDT	Areal Flood Advisory	VEF	San Bernardino	117 min
Jul 31, 4:45 AM PDT	Areal Flood Advisory	VEF	San Bernardino	42 min
Jul 31, 10:27 AM PDT	Areal Flood Advisory	VEF	Inyo	2 hr
Jul 31, 1:44 PM PDT	Areal Flood Advisory	VEF	San Bernardino	37 min

Nearby

Flash Flood Warnings in California, 2011 Every flash flood warning in 2011

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.