Alert archive / California / Flash Flood Warnings in 2011

Flash Flood Warning 31, NWS Las Vegas, NV

July 6, 2011Inyo County, California

NWS Las Vegas, NV issued this flash flood warning at Jul 6, 2011, 4:55 PM PDT for Inyo County, California. It was in force for 2 hr. 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 6, 2011, 4:55 PM PDT (23:55 UTC)
Expired: Jul 6, 2011, 7:00 PM PDT
In force: 2 hr
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, 11.9 hours before the alert went out and 143 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: 213 J/kg
Mixed-layer CIN: -235 J/kg
Mixed-layer LCL: 1843 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: -32 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.

998 
WGUS55 KVEF 062355
FFWVEF
CAC027-070200-
/O.NEW.KVEF.FF.W.0031.110706T2355Z-110707T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
455 PM PDT WED JUL 6 2011

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

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

* UNTIL 700 PM PDT.

* AT 447 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM THUNDERSTORMS ALONG A LINE EXTENDING FROM
  CENTRAL INYO COUNTY TO SOUTH CENTRAL INYO COUNTY...OR ALONG A LINE
  EXTENDING FROM 14 MILES SOUTH OF STOVEPIPE WELLS TO 35 MILES  
  NORTHEAST OF RIDGECREST. THE STORMS PRODUCING FLASH FLOODING WERE 
  NEARLY STATIONARY. AN AREA OF PARTICULAR CONCERN WITH THESE STORMS 
  IS THE PANAMINT VALLEY ROAD AND THE TRONA WILDROSE ROAD SOUTH OF 
  HIGHWAY 190.

* THE STORMS PRODUCING FLASH FLOODING WILL REMAIN OVER MAINLY RURAL
  AREAS OF THE INDICATED 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 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 3643 11702 3633 11705 3625 11705 3594 11706
      3608 11752 3644 11716

$$

JH

2 follow-up statements

598 
WGUS75 KVEF 070041
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
541 PM PDT WED JUL 6 2011

CAC027-070200-
/O.CON.KVEF.FF.W.0031.000000T0000Z-110707T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
INYO CA-
541 PM PDT WED JUL 6 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 700 PM PDT FOR
CENTRAL INYO COUNTY...

AT 536 PM PDT...MAINLY LIGHT RAIN WAS FALLING WITHIN THE WARNED AREA 
IN CENTRAL INYO COUNTY SOUTHWEST OF FURNACE CREEK. RUNOFF AND FLASH 
FLOODING FROM HEAVY RAIN EARLIER IS STILL POSSIBLE ALONG THE 
PANAMINT VALLEY ROAD AND TRONA WILDROSE ROAD SOUTH OF ROUTE 190.

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 TWITTER #NWSVEGAS.

&&

LAT...LON 3643 11702 3633 11705 3625 11705 3594 11706
      3608 11752 3644 11716

$$

JH

926 
WGUS75 KVEF 070154
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
654 PM PDT WED JUL 6 2011

CAC027-070202-
/O.EXP.KVEF.FF.W.0031.000000T0000Z-110707T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
INYO CA-
654 PM PDT WED JUL 6 2011

...THE FLASH FLOOD WARNING WILL EXPIRE AT 700 PM PDT FOR CENTRAL INYO
COUNTY...

HEAVY RAIN HAS NOT FALLEN IN THE WARNING AREA FOR QUITE AWHILE AND 
THERE HAVE BEEN NO REPORTS OF FLOODING SO THE WARNING WILL BE 
ALLOWED TO EXPIRE.

LAT...LON 3643 11702 3633 11705 3625 11705 3594 11706
      3608 11752 3644 11716

$$

JH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 5, 11:19 PM PDT	Areal Flood Advisory	VEF	San Bernardino	76 min
Jul 5, 11:49 PM PDT	Flash Flood Warning	VEF	San Bernardino	116 min
Jul 6, 12:04 AM PDT	Severe Thunderstorm Warning	VEF	San Bernardino	41 min
Jul 6, 12:15 AM PDT	Flash Flood Warning	VEF	San Bernardino	2 hr
Jul 6, 4:40 AM PDT	Flash Flood Watch	VEF	Inyo, San Bernardino	17 hr
Jul 6, 12:14 PM PDT	Areal Flood Advisory	VEF	Inyo	2 hr
Jul 6, 12:31 PM PDT	Areal Flood Advisory	VEF	Inyo	119 min
Jul 6, 1:12 PM PDT	Flash Flood Warning	VEF	Inyo	2 hr
Jul 6, 1:29 PM PDT	Flash Flood Warning	VEF	Inyo	2 hr
Jul 6, 4:07 PM PDT	Flash Flood Warning	VEF	Inyo	3 hr
Jul 6, 4:12 PM PDT	Flash Flood Warning	VEF	Inyo	3 hr

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.