Alert archive / Nevada / Flash Flood Warnings in 2014

Flash Flood Warning 2, NWS Las Vegas, NV

July 5, 2014Clark County, Nevada

NWS Las Vegas, NV issued this flash flood warning at Jul 5, 2014, 12:21 PM PDT for Clark County, Nevada. It was in force for 3 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 5, 2014, 12:21 PM PDT (19:21 UTC)
Expired
Jul 5, 2014, 3:15 PM PDT
In force
3 hr
Issued by
NWS Las Vegas, NV
Area
Storm-based polygon
Flood severity
None

County Clark County, NV

The radar

The Las Vegas radar (KESX), 89 km from the middle of the area, began a volume at 19:23 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 12:00Z, 7.4 hours before the alert went out and 31 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 2014-07-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 82 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 2014-07-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -30 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
82 J/kg
Mixed-layer CIN
-249 J/kg
Mixed-layer LCL
2430 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
-30 m²/s²
0-3 km storm-relative helicity
-8 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.

828 
WGUS55 KVEF 051921
FFWVEF
NVC003-052215-
/O.NEW.KVEF.FF.W.0002.140705T1921Z-140705T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
1221 PM PDT SAT JUL 5 2014

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WEST CENTRAL CLARK COUNTY IN SOUTHERN NEVADA...

* UNTIL 315 PM PDT

* AT 1214 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR            
  INDICATED FLASH FLOODING FROM A THUNDERSTORM NEAR LOVELL AND       
  TROUT CANYONS... OR 7 MILES SOUTH OF MT. CHARLESTON. THE STORM     
  PRODUCING FLASH FLOODING WAS MOVING WEST AT 5 MPH.

* LOCATIONS IMPACTED INCLUDE...
  THE CARPENTER 1 FIRE BURN SCAR

PRECAUTIONARY/PREPAREDNESS ACTIONS...

CAMPERS AND HIKERS SHOULD MOVE QUICKLY TO HIGHER GROUND IF RISING
WATER APPROACHES.

HEAVY RAIN IS FALLING ON THE CARPENTER 1 BURN AREA. WATER LEVELS WILL 
RISE VERY RAPIDLY...LEADING TO MUD AND DEBRIS FLOWS IN AND 
DOWNSTREAM OF THE BURN AREA.

&&

LAT...LON 3613 11590 3617 11590 3617 11577 3622 11572
      3623 11559 3619 11552 3599 11552 3597 11566

$$

OUTLER
3 follow-up statements
183 
WGUS75 KVEF 052010
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
110 PM PDT SAT JUL 5 2014

NVC003-052215-
/O.CON.KVEF.FF.W.0002.000000T0000Z-140705T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CLARK NV-
110 PM PDT SAT JUL 5 2014

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 315 PM PDT FOR WEST
CENTRAL CLARK COUNTY...

AT 104 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE THUNDERSTORMS PRODUCING FLASH FLOODING.  RADAR ESTIMATED 1 
TO 2 INCHES OF RAIN HAVE FALLEN ON THE SOUTHERN SIDE OF THE 
CARPENTER 1 BURN SCAR AND HEAVY RAIN CONTINUES TO FALL ON THE 
DOWNSTREAM WASHES. 

LOCATIONS IMPACTED INCLUDE...
WASHES IN AND DOWNSTREAM OF THE CARPENTER 1 BURN SCAR
HIGHWAY 160 BETWEEN MOUNTAIN SPRINGS AND PAHRUMP

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WATER LEVELS WILL RISE VERY RAPIDLY...LEADING TO MUD AND DEBRIS 
FLOWS IN AND DOWNSTREAM OF THE BURN AREA.

&&

LAT...LON 3613 11590 3617 11590 3617 11577 3622 11572
      3623 11559 3619 11552 3599 11552 3597 11566

$$

OUTLER
026 
WGUS75 KVEF 052129
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
229 PM PDT SAT JUL 5 2014

NVC003-052215-
/O.CON.KVEF.FF.W.0002.000000T0000Z-140705T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CLARK NV-
229 PM PDT SAT JUL 5 2014

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 315 PM PDT FOR WEST
CENTRAL CLARK COUNTY...

AT 223 PM PDT...MOST OF THE THUNDERSTORM ACTIVITY IN THE WARNED AREA 
HAS DIMINSIHED, HOWEVER EXCESSIVE RUNOFF FROM THIS AFTERNOONS STORMS 
WILL CONTINUE THROUGH 315 PM. 

LOCATIONS IMPACTED INCLUDE...
WASHES IN AND DOWNSTREAM OF THE CARPENTER 1 BURN SCAR
HIGHWAY 160 BETWEEN MOUNTAIN SPRINGS AND PAHRUMP

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WATER LEVELS WILL RISE VERY RAPIDLY...LEADING TO MUD AND DEBRIS 
FLOWS IN AND DOWNSTREAM OF THE BURN AREA.

&&

LAT...LON 3613 11590 3617 11590 3617 11577 3622 11572
      3623 11559 3619 11552 3599 11552 3597 11566

$$

OUTLER
906 
WGUS75 KVEF 052207
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
307 PM PDT SAT JUL 5 2014

NVC003-052215-
/O.EXP.KVEF.FF.W.0002.000000T0000Z-140705T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CLARK NV-
307 PM PDT SAT JUL 5 2014

...THE FLASH FLOOD WARNING WILL EXPIRE AT 315 PM PDT FOR WEST CENTRAL
CLARK COUNTY...

THE STORMS WHICH PROMPTED THE WARNING HAVE DIMINISHED AND LIFE 
THREATENING FLASH FLOODING IS NO LONGER EXPECTED. HOWEVER...LOCAL 
WASHES AND STREAMS MAY CONTINUE TO RUN HIGH FOR THE NEXT FEW HOURS.

LAT...LON 3613 11590 3617 11590 3617 11577 3622 11572
      3623 11559 3619 11552 3599 11552 3597 11566

$$

OUTLER

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 4, 10:09 PM PDTAreal Flood AdvisoryVEFClark81 min
Jul 5, 1:42 PM PDTAreal Flood AdvisoryVEFClark3 hr

Nearby

Flash Flood Warnings in Nevada, 2014Every flash flood warning in 2014

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.