Alert archive / Nevada / Flash Flood Warnings in 2012

Flash Flood Warning 1, NWS Las Vegas, NV

July 12, 2012Lincoln County, Nevada

NWS Las Vegas, NV issued this flash flood warning at Jul 12, 2012, 7:14 PM PDT for Lincoln County, Nevada. It was in force for 104 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 12, 2012, 7:14 PM PDT (02:14 UTC)
Expired
Jul 12, 2012, 8:58 PM PDT
In force
104 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), 134 km from the middle of the area, began a volume at 02:15 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, 2.2 hours before the alert went out and 169 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 2012-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 00:00Z on 2012-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -17 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
4004 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
-17 m²/s²
0-3 km storm-relative helicity
117 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.

618 
WGUS55 KVEF 130214
FFWVEF
NVC017-130415-
/O.NEW.KVEF.FF.W.0001.120713T0214Z-120713T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
714 PM PDT THU JUL 12 2012

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

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

* UNTIL 915 PM PDT.

* AT 707 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM A THUNDERSTORM 7 MILES NORTHWEST OF BEAVER DAM
  STATE PARK...OR 19 MILES EAST OF CALIENTE. THE STORM PRODUCING VERY
  HEAVY RAIN WAS NEARLY STATIONARY.

* LOCATIONS IMPACTED INCLUDE...
  CALIENTE AND PORTIONS OF HIGHWAY 93 FROM MILE MARKER 89 THROUGH
  MILE MARKER 107..

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 3751 11453 3764 11461 3780 11452 3771 11406
      3737 11406

$$

JENSEN
2 follow-up statements
613 
WGUS75 KVEF 130313
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
813 PM PDT THU JUL 12 2012

NVC017-130415-
/O.CON.KVEF.FF.W.0001.000000T0000Z-120713T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LINCOLN NV-
813 PM PDT THU JUL 12 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 PM PDT FOR EAST
CENTRAL LINCOLN COUNTY...

AT 803 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE THUNDERSTORMS PRODUCING VERY HEAVY RAIN AND PLENTY OF 
LIGHTNING FROM NEAR CALIENTE...EAST TO NEAR THE NEVADA / UTAH 
BORDER. THESE THUNDERSTORMS ARE MOVING VERY SLOWLY TO THE WEST.

LOCATIONS IMPACTED INCLUDE...
CALIENTE AND KERSHAW-RYAN CAMPGROUND AS WELL AS PORTIONS OF HIGHWAY 
93 BETWEEN MILE MARKERS MILE MARKER 89 AND 107.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLASH FLOODING IS EXPECTED ON AREA ROADWAYS...AROUND UNDERPASSES...
AND IN NORMALLY DRY WASHES AND LOW LYING AREAS. FLASH FLOODING IS
NATURES NUMBER ONE KILLER. 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 3751 11453 3764 11461 3780 11452 3771 11406
      3737 11406

$$

JENSEN
544 
WGUS75 KVEF 130358
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
858 PM PDT THU JUL 12 2012

NVC017-130404-
/O.CAN.KVEF.FF.W.0001.000000T0000Z-120713T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LINCOLN NV-
858 PM PDT THU JUL 12 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR EAST CENTRAL
LINCOLN COUNTY...

ISOLATED THUNDERSTORMS CONTINUE OVER LINCOLN COUNTY...HOWEVER THE 
STORMS WHICH WERE OVER THE EAST CENTRAL PORTION HAVE MOVED WEST AND 
DECREASED. ALTHOUGH LOCAL PONDING OF WATER OR FLOWING WATER IN 
NORMALLY DRY WASHES MAY BEEN SEEN THROUGH THE NIGHT...ADDITIONAL 
HEAVY RAINFALL IS NO LONGER EXPECTED. THUS THE FLASH FLOOD WARNING 
HAS BEEN CANCELLED FOR THE EAST CENTRAL PORTION OF LINCOLN COUNTY.

LAT...LON 3751 11453 3764 11461 3780 11452 3771 11406
      3737 11406

$$

JENSEN

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 13, 3:38 PM PDTFlash Flood WarningVEFClark112 min
Jul 13, 4:24 PM PDTFlash Flood WarningVEFClark41 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.