Alert archive / Nevada / Flash Flood Warnings in 2011

Flash Flood Warning 98, NWS Las Vegas, NV

September 15, 2011Lincoln County, Nevada

NWS Las Vegas, NV issued this flash flood warning at Sep 15, 2011, 5:46 PM PDT for Lincoln County, Nevada. It was in force for 119 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
Sep 15, 2011, 5:46 PM PDT (00:46 UTC)
Expired
Sep 15, 2011, 7:45 PM PDT
In force
119 min
Issued by
NWS Las Vegas, NV
Area
Storm-based polygon
Flood severity
None

County Lincoln County, NV

The radar

The Cedar City radar (KICX), 135 km from the middle of the area, began a volume at 00:49 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 00:00Z, 0.8 hours before the alert went out and 184 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 2011-09-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 88 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 2011-09-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 21 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
88 J/kg
Mixed-layer CIN
-109 J/kg
Mixed-layer LCL
2334 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
21 m²/s²
0-3 km storm-relative helicity
95 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.

653 
WGUS55 KVEF 160046
FFWVEF
NVC017-160245-
/O.NEW.KVEF.FF.W.0098.110916T0046Z-110916T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
546 PM PDT THU SEP 15 2011

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAST CENTRAL LINCOLN COUNTY IN SOUTH CENTRAL NEVADA...

* UNTIL 745 PM PDT.

* AT 542 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM A THUNDERSTORM OVER EAST CENTRAL LINCOLN
  COUNTY...OR 3 MILES SOUTHEAST OF PANACA. THE STORM PRODUCING VERY
  HEAVY RAIN WAS NEARLY STATIONARY.

* LOCATIONS IMPACTED INCLUDE...
  WASHES JUST EAST AND SOUTH OF PANACA INCLUDING MEADOW VALLEY WASH 
  ON THE EAST SIDE OF HIGHWAY 93.

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 3778 11441 3778 11432 3772 11430 3768 11447

$$

JA
2 follow-up statements
115 
WGUS75 KVEF 160145
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
645 PM PDT THU SEP 15 2011

NVC017-160245-
/O.CON.KVEF.FF.W.0098.000000T0000Z-110916T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LINCOLN NV-
645 PM PDT THU SEP 15 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 PM PDT FOR EAST
CENTRAL LINCOLN COUNTY...

AT 637 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A THUNDERSTORM PRODUCING MODERATE TO HEAVY RAIN. THIS STORM 
WAS LOCATED OVER EAST CENTRAL LINCOLN COUNTY...OR 11 MILES NORTHEAST 
OF CALIENTE. THE THUNDERSTORM WITH EXCESSIVE RAIN WAS NEARLY 
STATIONARY.

LOCATIONS IMPACTED INCLUDE...
WASHES JUST EAST AND SOUTH OF PANACA INCLUDING MEADOW VALLEY WASH   
ON THE EAST SIDE OF HIGHWAY 93.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3778 11441 3778 11432 3772 11430 3768 11447

$$

ASG
868 
WGUS75 KVEF 160243
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
743 PM PDT THU SEP 15 2011

NVC017-160252-
/O.EXP.KVEF.FF.W.0098.000000T0000Z-110916T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LINCOLN NV-
743 PM PDT THU SEP 15 2011

...THE FLASH FLOOD WARNING WILL EXPIRE AT 745 PM PDT FOR EAST CENTRAL
LINCOLN COUNTY...

LIGHT RAIN CONTINUES TO FALL OVER THE PREVIOUSLY WARNED AREA AND 
LOCAL WASHES MAY BE FULL...BUT THE THREAT OF ADDITIONAL FLOODING HAS 
ENDED. 

LAT...LON 3778 11441 3778 11432 3772 11430 3768 11447

$$

ASG

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 15, 5:14 PM PDTFlash Flood WarningVEFLincoln2 hr
Sep 15, 7:41 PM PDTFlash Flood WarningVEFLincoln2 hr
Sep 16, 12:47 PM PDTSevere Thunderstorm WarningVEFClark43 min
Sep 16, 1:29 PM PDTSevere Thunderstorm WarningVEFClark46 min
Sep 16, 1:58 PM PDTFlash Flood WarningVEFClark71 min
Sep 16, 2:03 PM PDTFlash Flood WarningVEFLincoln2 hr

Nearby

Flash Flood Warnings in Nevada, 2011Every 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.