Alert archive / Nevada / Flash Flood Warnings in 2016

Flash Flood Warning 110, NWS Las Vegas, NV

August 26, 2016Clark County, Nevada

NWS Las Vegas, NV issued this flash flood warning at Aug 26, 2016, 7:37 PM PDT for Clark County, Nevada. It was in force for 113 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 26, 2016, 7:37 PM PDT (02:37 UTC)
Expired
Aug 26, 2016, 9:30 PM PDT
In force
113 min
Issued by
NWS Las Vegas, NV
Area
Storm-based polygon
Flood severity
None

County Clark County, NV

The radar

The Las Vegas radar (KESX), 27 km from the middle of the area, began a volume at 02:41 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 26, 8:15 PM PDTFLASH FLOOD1 Ene Searchlight, NVCOTTONWOOD COVE ROAD CLOSED DUE TO FLOODING. TIME ESTIMATED BASED ON RADAR.

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, 2.6 hours before the alert went out and 119 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 2016-08-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 5 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 2016-08-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 22 square meters per square second.193958Sfc1 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
5 J/kg
Mixed-layer CIN
-12 J/kg
Mixed-layer LCL
3514 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
22 m²/s²
0-3 km storm-relative helicity
35 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

037 
WGUS55 KVEF 270237
FFWVEF
NVC003-270430-
/O.NEW.KVEF.FF.W.0110.160827T0237Z-160827T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
737 PM PDT FRI AUG 26 2016

THE NATIONAL WEATHER SERVICE IN LAS VEGAS  HAS ISSUED A

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

* UNTIL 930 PM PDT

* AT 736 PM PDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN OVER SEARCHLIGHT AND COTTONWOOD COVE ROAD. FLASH
  FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  SEARCHLIGHT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 3549 11477 3539 11477 3542 11501 3551 11499

$$

MORGAN
2 follow-up statements
252 
WGUS75 KVEF 270328
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
828 PM PDT FRI AUG 26 2016

NVC003-270430-
/O.CON.KVEF.FF.W.0110.000000T0000Z-160827T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CLARK NV-
828 PM PDT FRI AUG 26 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 930 PM PDT FOR
SOUTH CENTRAL CLARK COUNTY...

AT 827 PM PDT...DOPPLER RADAR INDICATED THAT HEAVY RAIN HAD MOVED
OUT OF SEARCHLIGHT AND WAS DIMINISHING ALONG COTTONWOOD COVE ROAD.
HOWEVER, MORE THUNDERSTORMS WERE APPROACHING FROM THE WEST, AND MORE
HEAVY RAIN IS LIKELY THROUGH 930 PM PDT.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
SEARCHLIGHT AND COTTONWOOD COVE ROAD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 3549 11477 3539 11477 3542 11501 3551 11499

$$

MORGAN
780 
WGUS75 KVEF 270425
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
925 PM PDT FRI AUG 26 2016

NVC003-270434-
/O.EXP.KVEF.FF.W.0110.000000T0000Z-160827T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CLARK NV-
925 PM PDT FRI AUG 26 2016

...THE FLASH FLOOD WARNING FOR SOUTH CENTRAL CLARK COUNTY WILL EXPIRE
AT 930 PM PDT...

HEAVY RAIN HAS ENDED IN THE SEARCHLIGHT AND COTTONWOOD COVE ROAD
AREAS. PLEASE CONTINUE TO HEED ANY REMAINING ROAD CLOSURES.

LAT...LON 3549 11477 3539 11477 3542 11501 3551 11499

$$

MORGAN

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 26, 6:38 PM PDTFlash Flood WarningVEFClark3 hr
Aug 26, 8:40 PM PDTFlash Flood WarningVEFClark4 hr
Aug 26, 9:23 PM PDTSevere Thunderstorm WarningVEFClark52 min
Aug 26, 9:26 PM PDTFlash Flood WarningVEFClark3 hr
Aug 26, 10:02 PM PDTSevere Thunderstorm WarningVEFClark22 min
Aug 26, 10:07 PM PDTSevere Thunderstorm WarningVEFClark38 min
Aug 26, 10:35 PM PDTFlash Flood WarningVEFClark3 hr
Aug 26, 10:50 PM PDTSevere Thunderstorm WarningVEFClark40 min

Nearby

Flash Flood Warnings in Nevada, 2016Every flash flood warning in 2016

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.