Alert archive / California / Flash Flood Warnings in 2011

Flash Flood Warning 56, NWS Las Vegas, NV

July 29, 2011Inyo County, California

NWS Las Vegas, NV issued this flash flood warning at Jul 29, 2011, 2:55 PM PDT for Inyo County, California. It was in force for 106 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 29, 2011, 2:55 PM PDT (21:55 UTC)
Expired: Jul 29, 2011, 4:41 PM PDT
In force: 106 min
Issued by: NWS Las Vegas, NV
Area: Storm-based polygon
Flood severity: None

County Inyo County, CA

The radar

The Las Vegas radar (KESX), 132 km from the middle of the area, began a volume at 21:57 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

Las Vegas, NV (KVEF), launched 12:00Z, 9.9 hours before the alert went out and 73 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 3616 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 2 m²/s²
0-3 km storm-relative helicity: 63 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.

060 
WGUS55 KVEF 292155
FFWVEF
CAC027-300000-
/O.NEW.KVEF.FF.W.0056.110729T2155Z-110730T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
255 PM PDT FRI JUL 29 2011

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

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

* UNTIL 500 PM PDT.

* AT 250 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM A THUNDERSTORM OVER EXTREME SOUTHEASTERN INYO
  COUNTY...OR 11 MILES NORTHEAST OF SHOSHONE. THE STORM PRODUCING
  VERY HEAVY RAIN WAS NEARLY STATIONARY.

* THE STORM PRODUCING VERY HEAVY RAIN WILL REMAIN OVER MAINLY RURAL  
  AREAS OF THE INDICATED COUNTY. HIGHWAY 178 BETWEEN THE             
  CALIFORNIA-NEVADA STATE LINE AND SHOSHONE COULD SEE WATER AS WELL  
  AS ROCKS AND DEBRIS ON IT FROM THIS STORM.

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 3600 11641 3629 11645 3627 11625 3609 11603
      3593 11611

$$

STACHELSKI

2 follow-up statements

065 
WGUS75 KVEF 292239
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
339 PM PDT FRI JUL 29 2011

CAC027-300000-
/O.CON.KVEF.FF.W.0056.000000T0000Z-110730T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
INYO CA-
339 PM PDT FRI JUL 29 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 500 PM PDT FOR
SOUTHEASTERN INYO COUNTY...

AT 331 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A THUNDERSTORM PRODUCING VERY HEAVY RAIN.  THIS STORM WAS
LOCATED OVER SOUTHEASTERN INYO COUNTY...OR 10 MILES NORTH OF 
SHOSHONE. THE THUNDERSTORM WITH EXCESSIVE RAIN WAS NEARLY 
STATIONARY. RAINFALL ESTIMATES IN EXCESS OF ONE INCH HAVE BEEN 
ESTIMATED BY NATIONAL WEATHER SERVICE RADAR.

THE STORM PRODUCING VERY HEAVY RAIN WILL REMAIN OVER MAINLY RURAL 
AREAS OF THE INDICATED COUNTY. HIGHWAY 178 BETWEEN THE 
CALIFORNIA-NEVADA STATE LINE AND SHOSHONE MAY BE IMPACTED WITH WATER 
AS WELL AS ROCKS AND MUD.

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 3600 11641 3629 11645 3627 11625 3609 11603
      3593 11611

$$

STACHELSKI

808 
WGUS75 KVEF 292341
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
441 PM PDT FRI JUL 29 2011

CAC027-292350-
/O.CAN.KVEF.FF.W.0056.000000T0000Z-110730T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
INYO CA-
441 PM PDT FRI JUL 29 2011

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

THUNDERSTORMS HAVE MOVED AWAY FROM SOUTHEAST INYO COUNTY AT THIS 
TIME. THE HAS BEEN NO REPORTS OF FLOODING IN THIS AREA...THUS THE 
FLASH FLOOD WARNING FOR THIS AREA HAS BEEN CANCELLED.

LAT...LON 3600 11641 3629 11645 3627 11625 3609 11603
      3593 11611

$$

STACHELSKI

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 29, 12:31 PM PDT	Areal Flood Advisory	VEF	Inyo	4 hr
Jul 29, 3:04 PM PDT	Severe Thunderstorm Warning	VEF	Inyo	41 min
Jul 29, 3:16 PM PDT	Flash Flood Watch	VEF	Inyo, San Bernardino	51 hr
Jul 29, 4:37 PM PDT	Flash Flood Warning	VEF	San Bernardino	113 min
Jul 29, 4:40 PM PDT	Flash Flood Warning	VEF	San Bernardino	2 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; radar from the NEXRAD Level II archive.