Alert archive / Nevada / Flash Flood Warnings in 2012

Flash Flood Warning 124, NWS Las Vegas, NV

August 18, 2012Nye County, Nevada

NWS Las Vegas, NV issued this flash flood warning at Aug 18, 2012, 4:18 PM PDT for Nye County, Nevada. It was in force for 53 min. 1 report 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 18, 2012, 4:18 PM PDT (23:18 UTC)
Expired
Aug 18, 2012, 5:11 PM PDT
In force
53 min
Issued by
NWS Las Vegas, NV
Area
Storm-based polygon
Flood severity
None

County Nye County, NV

What was reported inside it

TimeReportWhereRemark
Aug 18, 5:04 PM PDTHEAVY RAIN 1Se Beatty, NVSPOTTER REPORTS 3 INCHES OF WATER FLOWING DOWN 2ND ST IN BEATTY. ABOUT 1 INCH OF RAIN FELL IN THE HOUR FROM 4 TO 5 PM.

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 12:00Z, 11.3 hours before the alert went out and 131 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 12:00Z on 2012-08-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 33 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Las Vegas, NV at 12:00Z on 2012-08-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -22 square meters per square second.193958Sfc1 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
33 J/kg
Mixed-layer CIN
-303 J/kg
Mixed-layer LCL
2227 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-22 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.

829 
WGUS55 KVEF 182318
FFWVEF
NVC023-190115-
/O.NEW.KVEF.FF.W.0124.120818T2318Z-120819T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
418 PM PDT SAT AUG 18 2012

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTH CENTRAL NYE COUNTY IN SOUTH CENTRAL NEVADA...

* UNTIL 615 PM PDT.

* AT 413 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM A THUNDERSTORM NEAR BEATTY. THE STORM
  PRODUCING VERY HEAVY RAIN WAS NEARLY STATIONARY.

* LOCATIONS IMPACTED INCLUDE...
  BEATTY AND HIGHWAY 95 BETWEEN NYE COUNTY MILE MARKERS 58 AND 72.

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 3703 11690 3708 11668 3693 11669 3680 11688

$$

MORGAN
1 follow-up statement
994 
WGUS75 KVEF 190011
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
511 PM PDT SAT AUG 18 2012

NVC023-190020-
/O.CAN.KVEF.FF.W.0124.000000T0000Z-120819T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NYE NV-
511 PM PDT SAT AUG 18 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTH CENTRAL NYE
COUNTY...

AT 510 PM PDT...RADAR INDICATED THUNDERSTORMS MOVING SOUTH AWAY FROM 
THE BEATTY AREA. A SPOTTER IN BEATTY REPORTED THREE INCHES OF WATER 
HAD BEEN RUNNING DOWN SECOND STREET...BUT THIS HAD SUBSIDED AS THE 
RAIN ENDED. NO ADDITIONAL FLOODING IS EXPECTED...SO THE FLASH FLOOD 
WARNING HAS BEEN CANCELLED.

LAT...LON 3703 11690 3708 11668 3693 11669 3680 11688

$$

MORGAN

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 17, 8:32 PM PDTFlash Flood WarningVEFClark, Lincoln4 hr
Aug 17, 11:39 PM PDTFlash Flood WarningVEFClark2 hr
Aug 18, 12:01 PM PDTAreal Flood AdvisoryVEFClark119 min
Aug 18, 2:00 PM PDTAreal Flood AdvisoryVEFNye2 hr
Aug 18, 3:26 PM PDTAreal Flood AdvisoryVEFClark, Nye54 min
Aug 18, 3:39 PM PDTFlash Flood WarningVEFClark63 min
Aug 18, 4:24 PM PDTFlash Flood WarningVEFNye96 min

Nearby

Flash 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.