Alert archive / Nevada / Flash Flood Warnings in 2012

Flash Flood Warning 49, NWS Las Vegas, NV

July 15, 2012Lincoln County, Nevada

NWS Las Vegas, NV issued this flash flood warning at Jul 15, 2012, 5:44 PM PDT for Lincoln County, Nevada. It was in force for 2 hr. 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 15, 2012, 5:44 PM PDT (00:44 UTC)
Expired: Jul 15, 2012, 7:45 PM PDT
In force: 2 hr
Issued by: NWS Las Vegas, NV
Area: Storm-based polygon
Flood severity: None

County Lincoln County, NV

The radar

The Cedar City radar (KICX), 112 km from the middle of the area, began a volume at 00:46 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, 0.7 hours before the alert went out and 181 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: 91 J/kg
Mixed-layer CIN: -189 J/kg
Mixed-layer LCL: 2314 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -62 m²/s²
0-3 km storm-relative helicity: -3 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.

499 
WGUS55 KVEF 160044
FFWVEF
NVC017-160245-
/O.NEW.KVEF.FF.W.0049.120716T0044Z-120716T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
544 PM PDT SUN JUL 15 2012

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/845 PM MDT/.

* AT 540 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM A THUNDERSTORM NEAR BEAVER DAM...OR 26 MILES
  EAST OF CALIENTE. THE STORM PRODUCING VERY HEAVY RAIN WAS NEARLY
  STATIONARY.

* LOCATIONS IMPACTED INCLUDE...
  BEAVER DAM AND BEAVER DAM STATE PARK.

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 3763 11404 3719 11405 3719 11430 3779 11429
      3787 11405

$$

STACHELSKI

2 follow-up statements

854 
WGUS75 KVEF 160131
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
631 PM PDT SUN JUL 15 2012

NVC017-160245-
/O.CON.KVEF.FF.W.0049.000000T0000Z-120716T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LINCOLN NV-
631 PM PDT SUN JUL 15 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 PM PDT/845 PM
MDT/ FOR EAST CENTRAL LINCOLN COUNTY...

AT 625 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A THUNDERSTORM PRODUCING VERY HEAVY RAIN.  THIS STORM WAS
LOCATED NEAR BEAVER DAM...OR 27 MILES EAST OF CALIENTE. THE 
THUNDERSTORM WITH EXCESSIVE RAIN WAS NEARLY STATIONARY. RADAR 
ESTIMATES WELL OVER AN INCH OF RAIN HAS FALLEN IN ASSOCIATION WITH 
THIS THUNDERSTORM. 

LOCATIONS IMPACTED INCLUDE...
BEAVER DAM STATE PARK.

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 3763 11404 3719 11405 3719 11430 3779 11429
      3787 11405

$$

STACHELSKI

232 
WGUS75 KVEF 160241
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
741 PM PDT SUN JUL 15 2012

NVC017-160251-
/O.EXP.KVEF.FF.W.0049.000000T0000Z-120716T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LINCOLN NV-
741 PM PDT SUN JUL 15 2012

...THE FLASH FLOOD WARNING WILL EXPIRE AT 745 PM PDT/845 PM MDT/ FOR
EAST CENTRAL LINCOLN COUNTY...

RAINFALL DIMINISHED IN THE WARNING AREA AND THE THREAT OF FLASH 
FLOODING HAS ENDED. 

LAT...LON 3763 11404 3719 11405 3719 11430 3779 11429
      3787 11405

$$

JH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 10:00 PM PDT	Severe Thunderstorm Warning	VEF	Clark	45 min
Jul 15, 10:07 PM PDT	Areal Flood Advisory	VEF	Clark	53 min
Jul 15, 10:48 PM PDT	Severe Thunderstorm Warning	VEF	Clark	42 min
Jul 15, 10:53 PM PDT	Areal Flood Advisory	VEF	Clark	52 min
Jul 16, 1:09 AM PDT	Severe Thunderstorm Warning	VEF	Clark	36 min
Jul 16, 2:00 AM PDT	Flash Flood Watch	VEF	Clark, Lincoln	19 hr
Jul 16, 1:04 PM PDT	Severe Thunderstorm Warning	VEF	Clark	41 min
Jul 16, 4:36 PM PDT	Areal Flood Advisory	VEF	Clark	68 min

Nearby

Flash Flood Warnings in Nevada, 2012 Every 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.