Alert archive / Nevada / Flash Flood Warnings in 2016

Flash Flood Warning 43, NWS Las Vegas, NV

July 31, 2016Lincoln County, Nevada

NWS Las Vegas, NV issued this flash flood warning at Jul 31, 2016, 6:37 PM PDT for Lincoln 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 31, 2016, 6:37 PM PDT (01:37 UTC)
Expired
Jul 31, 2016, 9:30 PM PDT
In force
3 hr
Issued by
NWS Las Vegas, NV
Area
Storm-based polygon
Flood severity
None

County Lincoln County, NV

The radar

The Las Vegas radar (KESX), 170 km from the middle of the area, began a volume at 01:37 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, 1.6 hours before the alert went out and 104 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 2016-08-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 572 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 2016-08-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 104 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
572 J/kg
Mixed-layer CIN
-79 J/kg
Mixed-layer LCL
2999 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
104 m²/s²
0-3 km storm-relative helicity
150 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

165 
WGUS55 KVEF 010137
FFWVEF
NVC017-010430-
/O.NEW.KVEF.FF.W.0043.160801T0137Z-160801T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
637 PM PDT SUN JUL 31 2016

THE NATIONAL WEATHER SERVICE IN LAS VEGAS  HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTH CENTRAL LINCOLN COUNTY IN SOUTH CENTRAL NEVADA...

* UNTIL 930 PM PDT

* AT 634 PM PDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS ALONG STATE HIGHWAY 93 SOUTH OF ALAMO. FLASH
  FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  ALAMO...STATE HIGHWAY 93...KANE SPRINGS ROAD...
  ALAMO ROAD AND PAHRANAGAT WILDLIFE REFUGE. 

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 3741 11493 3694 11484 3695 11522 3740 11529

$$

JS
2 follow-up statements
526 
WGUS75 KVEF 010317
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
817 PM PDT SUN JUL 31 2016

NVC017-010430-
/O.CON.KVEF.FF.W.0043.000000T0000Z-160801T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LINCOLN NV-
817 PM PDT SUN JUL 31 2016

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

AT 815 PM PDT...DOPPLER RADAR INDICATED THAT MUCH OF THE HEAVY RAIN
OVER THE WARNED AREA HAS MOVED EAST. HOWEVER, ITS LIKELY THAT RUNOFF
WILL LEAD TO A CONTINUED FLASH FLOOD THREAT. 

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
ALAMO AND PAHRANAGAT WILDLIFE REFUGE. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

FLOODING IS OCCURRING OR IS IMMINENT. IT IS IMPORTANT TO KNOW WHERE
YOU ARE RELATIVE TO STREAMS...RIVERS...OR CREEKS WHICH CAN BECOME
KILLERS IN HEAVY RAINS. CAMPERS AND HIKERS SHOULD AVOID STREAMS OR
CREEKS.

&&

LAT...LON 3741 11493 3694 11484 3695 11522 3740 11529

$$

ASG
488 
WGUS75 KVEF 010426
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
926 PM PDT SUN JUL 31 2016

NVC017-010435-
/O.EXP.KVEF.FF.W.0043.000000T0000Z-160801T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LINCOLN NV-
926 PM PDT SUN JUL 31 2016

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

DOPPLER RADAR HAS INDICATED THAT THE HEAVY RAIN HAS ENDED. HOWEVER,
RUNOFF FROM EARLIER HEAVY RAIN MAY STILL CAUSE SOME MINOR PONDING ON
AREA ROADS INCLUDING HIGHWAY 93 AND KANE SPRINGS ROAD. PLEASE
CONTINUE TO HEED ANY ROAD CLOSURES, IF THEY EXIST.

LAT...LON 3741 11493 3694 11484 3695 11522 3740 11529

$$

ASG

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 31, 5:19 PM PDTSevere Thunderstorm WarningVEFLincoln41 min
Jul 31, 5:52 PM PDTFlash Flood WarningVEFClark, Lincoln3 hr
Jul 31, 7:28 PM PDTFlash Flood WarningVEFLincoln3 hr
Aug 1, 2:33 AM PDTFlash Flood WatchVEFClark, Lincoln26 hr
Aug 1, 2:47 PM PDTFlash Flood WarningVEFClark3 hr
Aug 1, 4:43 PM PDTSevere Thunderstorm WarningVEFLincoln47 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.