Alert archive / Nevada / Flash Flood Warnings in 2012

Flash Flood Warning 100, NWS Las Vegas, NV

August 3, 2012Nye County, Nevada

NWS Las Vegas, NV issued this flash flood warning at Aug 3, 2012, 5:56 PM PDT for Nye County, Nevada. It was in force for 65 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 3, 2012, 5:56 PM PDT (00:56 UTC)
Expired
Aug 3, 2012, 7:01 PM PDT
In force
65 min
Issued by
NWS Las Vegas, NV
Area
Storm-based polygon
Flood severity
None

County Nye County, NV

The radar

The Las Vegas radar (KESX), 203 km from the middle of the area, began a volume at 00:57 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.

What was reported inside it

TimeReportWhereRemark
Aug 3, 7:00 PM PDTFLASH FLOOD1 Nw Beatty, NVA SPOTTER REPORTED THE WEST END OF NORTH AVENUE IN BEATTY WHICH IS A GRAVEL ROAD WASHED OUT. THE EAST END OF NORTH AVENUE WHICH IS PAVED HAD MUD ON IT. THE EVENT TIME IS AN ESTIMATE.

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 00:00Z, 0.9 hours before the alert went out and 113 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 2012-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 35 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 2012-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -3 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
35 J/kg
Mixed-layer CIN
-98 J/kg
Mixed-layer LCL
3971 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
-3 m²/s²
0-3 km storm-relative helicity
10 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.

645 
WGUS55 KVEF 040056
FFWVEF
NVC023-040300-
/O.NEW.KVEF.FF.W.0100.120804T0056Z-120804T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
556 PM PDT FRI AUG 3 2012

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

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

* UNTIL 800 PM PDT.

* AT 549 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM A THUNDERSTORM NEAR BEATTY RV PARK...OR NEAR
  BEATTY. THE STORM PRODUCING VERY HEAVY RAIN WAS NEARLY STATIONARY.

* LOCATIONS IMPACTED INCLUDE...
  BEATTY RV PARK...BEATTY AND HIGHWAY 95 FROM BEATTY TO MILE MARKER  
  42.

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 3668 11657 3676 11680 3700 11682 3701 11661

$$

STACHELSKI
1 follow-up statement
128 
WGUS75 KVEF 040201
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
701 PM PDT FRI AUG 3 2012

NVC023-040207-
/O.CAN.KVEF.FF.W.0100.000000T0000Z-120804T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NYE NV-
701 PM PDT FRI AUG 3 2012

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

THUNDERSTORMS THAT PRODUCED THE EARLIER HEAVY RAIN NEAR BEATTY HAS 
MOVED OUT OF THE WARNED AREA. ALTHOUGH WATER LEVELS MAY REMAIN 
ELEVATED IN SOME AREA WASHES THROUGH 800 PM...THE THREAT OF FLASH 
FLOODING HAS ENDED. DRIVERS SHOULD USE CAUTION WHILE DRIVING ON AREA 
ROADWAYS DUE TO PONDING OF WATER AND MINOR RUNOFF CROSSING LOW LYING 
AREAS.

LAT...LON 3668 11657 3676 11680 3700 11682 3701 11661

$$

JS

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 3, 5:00 PM PDTSevere Thunderstorm WarningVEFNye45 min
Aug 3, 5:06 PM PDTSevere Thunderstorm WarningVEFNye24 min
Aug 3, 5:26 PM PDTFlash Flood WarningVEFNye72 min
Aug 3, 5:28 PM PDTSevere Thunderstorm WarningVEFNye19 min
Aug 3, 5:48 PM PDTSevere Thunderstorm WarningVEFNye42 min
Aug 3, 5:51 PM PDTFlash Flood WarningVEFNye50 min
Aug 3, 5:58 PM PDTSevere Thunderstorm WarningVEFNye47 min
Aug 3, 6:25 PM PDTSevere Thunderstorm WarningVEFNye50 min
Aug 3, 7:13 PM PDTFlash Flood WarningVEFNye2 hr

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; radar from the NEXRAD Level II archive.