Alert archive / Nevada / Flash Flood Warnings in 2016

Flash Flood Warning 59, NWS Las Vegas, NV

August 3, 2016Clark County, Nevada

NWS Las Vegas, NV issued this flash flood warning at Aug 3, 2016, 12:13 PM PDT for Clark County, Nevada. It was in force for 3 hr. 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 3, 2016, 12:13 PM PDT (19:13 UTC)
Expired
Aug 3, 2016, 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), 99 km from the middle of the area, began a volume at 19:14 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 3, 1:00 PM PDTFLASH FLOOD4 Ne Mt. Charleston, NVTHE PARK SERVICE REPORTED FLOOD WATERS UNDERMINED THE ROAD WAY AND DAMAGED A GUARDRAIL ON SR 158 NEAR MILE MARKER 4.

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 12:00Z, 7.2 hours before the alert went out and 5 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 2016-08-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 496 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 12:00Z on 2016-08-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 68 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
496 J/kg
Mixed-layer CIN
-182 J/kg
Mixed-layer LCL
2123 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
68 m²/s²
0-3 km storm-relative helicity
111 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

As transmitted.

423 
WGUS55 KVEF 031913
FFWVEF
NVC003-032215-
/O.NEW.KVEF.FF.W.0059.160803T1913Z-160803T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
1213 PM PDT WED AUG 3 2016

THE NATIONAL WEATHER SERVICE IN LAS VEGAS  HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN CLARK COUNTY IN SOUTHERN NEVADA...

* UNTIL 315 PM PDT

* AT 1211 PM PDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA...PARTICULARLY OVER HIGHWAY 158.
  FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  SPRING MOUNTAINS...MAHOGANY GROVE CAMPGROUND...
  HILLTOP CAMPGROUND AND WILLOW CREEK CAMPGROUND...
  AND HIGHWAY 158. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3640 11541 3628 11564 3643 11578 3654 11558
      3647 11547

$$

SC
2 follow-up statements
813 
WGUS75 KVEF 032022
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
122 PM PDT WED AUG 3 2016

NVC003-032215-
/O.CON.KVEF.FF.W.0059.000000T0000Z-160803T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CLARK NV-
122 PM PDT WED AUG 3 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 315 PM PDT FOR
NORTHWESTERN CLARK COUNTY...

AT 117 PM PDT...DOPPLER RADAR INDICATED THUNDERSTORMS HAVE
DIMINISHED ACROSS THE WARNED AREA. RAINFALL WAS ESTIMATED BETWEEN 1
AND 2 INCHES OVER HIGHWAY 158 FROM EARLIER THUNDERSTORMS AND WILL
CONTINUE TO PRODUCE FLOODING.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
SPRING MOUNTAINS...MAHOGANY GROVE CAMPGROUND...HILLTOP CAMPGROUND AND
WILLOW CREEK CAMPGROUND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...FARMLAND...AND OTHER LOW LYING
SPOTS.

&&

LAT...LON 3640 11541 3628 11564 3643 11578 3654 11558
      3647 11547

$$

SC
127 
WGUS75 KVEF 032218
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
318 PM PDT WED AUG 3 2016

NVC003-032227-
/O.EXP.KVEF.FF.W.0059.000000T0000Z-160803T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CLARK NV-
318 PM PDT WED AUG 3 2016

...THE FLASH FLOOD WARNING FOR NORTHWESTERN CLARK COUNTY HAS
EXPIRED...

THE HEAVY RAIN HAS ENDED. FLOODING IS NO LONGER EXPECTED TO POSE AN
IMMEDIATE THREAT. PLEASE CONTINUE TO HEED ANY REMAINING ROAD
CLOSURES. ALSO BE AWARE THAT MORE STORMS COULD DEVELOP THROUGHOUT
THIS AFTERNOON AND TONIGHT.

LAT...LON 3640 11541 3628 11564 3643 11578 3654 11558
      3647 11547

$$

JH

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 3, 2:54 AM PDTFlash Flood WatchVEFClark, Lincoln, Nye50 hr
Aug 3, 4:34 PM PDTSevere Thunderstorm WarningVEFClark26 min
Aug 3, 4:41 PM PDTFlash Flood WarningVEFLincoln3 hr

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.