Alert archive / Nevada / Flash Flood Warnings in 2014

Flash Flood Warning 182, NWS Las Vegas, NV

September 26, 2014Clark County, Nevada

NWS Las Vegas, NV issued this flash flood warning at Sep 26, 2014, 5:22 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
Sep 26, 2014, 5:22 PM PDT (00:22 UTC)
Expired
Sep 26, 2014, 8:15 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), 93 km from the middle of the area, began a volume at 00:23 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 00:00Z, 0.4 hours before the alert went out and 28 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 2014-09-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 333 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 00:00Z on 2014-09-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 32 square meters per square second.19395878Sfc1 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
333 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
2808 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
32 m²/s²
0-3 km storm-relative helicity
25 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.

851 
WGUS55 KVEF 270022
FFWVEF
NVC003-270315-
/O.NEW.KVEF.FF.W.0182.140927T0022Z-140927T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
522 PM PDT FRI SEP 26 2014

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

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

* UNTIL 815 PM PDT

* AT 518 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM A THUNDERSTORM OVER WEST CENTRAL CLARK   
COUNTY...ON THE SOUTHWESTERN SIDE OF THE CARPENTER ONE BURN AREA. 
RUNOFF FROM THIS HEAVY RAIN WILL FLOW DOWN TROUT CANYON ROAD TOWARDS 
HIGHWAY 160. WATER MAY FLOW ACROSS HIGHWAY 160 BETWEEN MILE MARKERS 
34 AND THE NYE COUNTY BORDER.

* LOCATIONS IMPACTED INCLUDE...
  TROUT CANYON ROAD AND HIGHWAY 160.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3614 11590 3616 11589 3615 11577 3618 11572
      3624 11572 3626 11569 3623 11565 3624 11562
      3621 11559 3603 11573

$$

STUMPF
1 follow-up statement
282 
WGUS75 KVEF 270247
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
747 PM PDT FRI SEP 26 2014

NVC003-270256-
/O.CAN.KVEF.FF.W.0182.000000T0000Z-140927T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CLARK NV-
747 PM PDT FRI SEP 26 2014

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR WEST CENTRAL CLARK
COUNTY...

HEAVY RAIN HAS MOVED NORTH OF THE CARPENTER ONE BURN AREA. ALTHOUGH 
SOME MINOR RUNOFF MAY STILL OCCUR...THE THREAT OF FLASH FLOODING HAS 
ENDED. 

LAT...LON 3614 11590 3616 11589 3615 11577 3618 11572
      3624 11572 3626 11569 3623 11565 3624 11562
      3621 11559 3603 11573

$$

ASG

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 26, 5:32 PM PDTFlash Flood WarningVEFClark3 hr
Sep 26, 6:12 PM PDTAreal Flood AdvisoryVEFClark93 min
Sep 26, 6:43 PM PDTFlash Flood WarningVEFClark2 hr
Sep 26, 7:31 PM PDTAreal Flood WarningVEFClark20 hr
Sep 26, 8:15 PM PDTFlash Flood WarningVEFLincoln3 hr
Sep 26, 9:16 PM PDTSevere Thunderstorm WarningVEFClark, Lincoln29 min
Sep 26, 10:16 PM PDTFlash Flood WarningVEFClark, Lincoln3 hr
Sep 26, 11:21 PM PDTFlash Flood WarningVEFLincoln3 hr
Sep 27, 4:59 AM PDTFlash Flood WarningVEFClark, Lincoln3 hr
Sep 27, 3:27 PM PDTAreal Flood AdvisoryVEFClark6 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.