Alert archive / Arizona / Flash Flood Warnings in 2026

Flash Flood Warning 32, NWS Las Vegas, NV

August 14, 2026Mohave County, Arizona; Clark County, Nevada

NWS Las Vegas, NV issued this flash flood warning at Aug 14, 2026, 3:09 PM MST for Mohave County, Arizona; Clark County, Nevada. It was in force for 7 hr. 2 reports 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 14, 2026, 3:09 PM MST (22:09 UTC)
Expired
Aug 14, 2026, 10:15 PM MST
In force
7 hr
Issued by
NWS Las Vegas, NV
Area
Storm-based polygon
Damage threat
Considerable
Flood severity
None

Counties Mohave County, AZ, Clark County, NV

The radar

The Las Vegas radar (KESX), 22 km from the middle of the area, began a volume at 22:08 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 14, 4:00 PM MSTFLASH FLOOD12 S Railroad Pass, NVPhoto shows water flowing over Highway 165 near Nelson.
Aug 14, 5:03 PM MSTFLASH FLOOD16 S Boulder City, NVNV DOT reports flooding blocking both lanes of State Route 165 resulting in the closure of the road.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 2 storm reports to this flash flood warning; the first came 51 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Las Vegas, NV (KVEF), launched 12:00Z, 10.2 hours before the alert went out and 89 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 2026-08-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 233 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 2026-08-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 1 square meters per square second.1939587897Sfc1 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
233 J/kg
Mixed-layer CIN
-123 J/kg
Mixed-layer LCL
2555 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
1 m²/s²
0-3 km storm-relative helicity
52 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

870 
WGUS55 KVEF 142209
FFWVEF
AZC015-NVC003-150115-
/O.NEW.KVEF.FF.W.0032.260814T2209Z-260815T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
309 PM PDT Fri Aug 14 2026

The National Weather Service in Las Vegas has issued a

* Flash Flood Warning for...
  Western Mohave County in northwestern Arizona...
  Central Clark County in southern Nevada...

* Until 615 PM PDT /615 PM MST/.

* At 309 PM PDT /309 PM MST/, Doppler radar indicated thunderstorms
  producing heavy rain across the warned area. Up to 1.5 inches of
  rain have fallen. Flash flooding is ongoing or expected to begin
  shortly.

  HAZARD...Life threatening flash flooding. Thunderstorms producing
           flash flooding.

  SOURCE...Radar indicated.

  IMPACT...Life threatening flash flooding of creeks and streams,
           urban areas, highways, streets and underpasses.

* Some locations that will experience flash flooding include...
  Nelson, Hoover Dam and Willow Beach.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&

LAT...LON 3604 11473 3605 11472 3589 11458 3570 11466
      3560 11495 3577 11502

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

MW
4 follow-up statements
767 
WGUS75 KVEF 142349
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
449 PM PDT Fri Aug 14 2026

AZC015-NVC003-150115-
/O.CON.KVEF.FF.W.0032.000000T0000Z-260815T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-Clark NV-
449 PM PDT Fri Aug 14 2026 /449 PM MST Fri Aug 14 2026/

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 PM PDT /615 PM
MST/ THIS EVENING FOR WESTERN MOHAVE AND CENTRAL CLARK COUNTIES...

At 449 PM PDT /449 PM MST/, Doppler radar indicated thunderstorms
producing heavy rain across the warned area. Up to 3 inches of rain
have fallen. Flash flooding is ongoing or expected to begin shortly.

HAZARD...Life threatening flash flooding. Thunderstorms producing
         flash flooding.

SOURCE...Radar indicated.

IMPACT...Life threatening flash flooding of creeks and streams, urban
         areas, highways, streets and underpasses.

Some locations that will experience flash flooding include...
  Nelson, Hoover Dam and Willow Beach.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&

LAT...LON 3604 11473 3605 11472 3589 11458 3570 11466
      3560 11495 3577 11502

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

MW
104 
WGUS55 KVEF 150036
FFWVEF
AZC015-NVC003-150315-
/O.EXT.KVEF.FF.W.0032.000000T0000Z-260815T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
536 PM PDT Fri Aug 14 2026

The National Weather Service in Las Vegas has extended the

* Flash Flood Warning for...
  Western Mohave County in northwestern Arizona...
  Central Clark County in southern Nevada...

* Until 815 PM PDT /815 PM MST/.

* At 536 PM PDT /536 PM MST/, Doppler radar indicated thunderstorms
  producing heavy rain across the warned area. Up to 4 inches of rain
  have fallen. Flash flooding is ongoing or expected to begin
  shortly.

  HAZARD...Life threatening flash flooding. Thunderstorms producing
           flash flooding.

  SOURCE...Radar indicated.

  IMPACT...Life threatening flash flooding of creeks and streams,
           urban areas, highways, streets and underpasses.

* Some locations that will experience flash flooding include...
  Nelson, Hoover Dam and Willow Beach.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&

LAT...LON 3604 11473 3605 11472 3589 11458 3570 11466
      3560 11495 3577 11502

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

MW
590 
WGUS55 KVEF 150248
FFWVEF
AZC015-NVC003-150515-
/O.EXT.KVEF.FF.W.0032.000000T0000Z-260815T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
748 PM PDT Fri Aug 14 2026

The National Weather Service in Las Vegas has extended the

* Flash Flood Warning for...
  Western Mohave County in northwestern Arizona...
  Central Clark County in southern Nevada...

* Until 1015 PM PDT /1015 PM MST/.

* At 748 PM PDT /748 PM MST/, local law enforcement reported
  thunderstorms producing heavy rain across the warned area. Up to 4
  inches of rain have fallen. Flash flooding is ongoing or expected
  to begin shortly.

  HAZARD...Life threatening flash flooding. Thunderstorms producing
           flash flooding.

  SOURCE...Department of Transportation reported.

  IMPACT...Life threatening flash flooding of creeks and streams,
           urban areas, highways, streets and underpasses.

* Some locations that will experience flash flooding include...
  Nelson, Hoover Dam and Willow Beach.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&

LAT...LON 3604 11473 3605 11472 3589 11458 3570 11466
      3560 11495 3577 11502

FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

MW
029 
WGUS75 KVEF 150510
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
1010 PM PDT Fri Aug 14 2026

AZC015-NVC003-150520-
/O.EXP.KVEF.FF.W.0032.000000T0000Z-260815T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-Clark NV-
1010 PM PDT Fri Aug 14 2026 /1010 PM MST Fri Aug 14 2026/

...FLASH FLOOD WARNING WILL EXPIRE AT 1015 PM PDT /1015 PM MST/ THIS
EVENING FOR WESTERN MOHAVE AND CENTRAL CLARK COUNTIES...

The heaviest rain has ended. An Areal Flood Warning has been issued
until 345 AM due to lingering flooding as water runs off. Please
continue to heed remaining road closures.

&&

LAT...LON 3604 11473 3605 11472 3589 11458 3570 11466
      3560 11495 3577 11502

$$

MW

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Las Vegas, NV wrote its last area forecast discussion before this flash flood warning went out at Aug 14, 2:20 PM MST, 49 minutes earlier. Its key messages:

  • * Thunderstorm chances will mainly persist through Saturday across Lincoln, Clark and Mohave counties through Saturday. FLash Flood Watches are in affect for Northern Mohave County and most of Lincoln County. * Mostly dry conditions are expected late this weekend and into the next work week. * The weekend starts off another steady warming trend.
Area forecast discussion, Aug 14, 2:20 PM MST, 49 minutes before
Area Forecast Discussion
National Weather Service Las Vegas NV
220 PM PDT Fri Aug 14 2026

.KEY MESSAGES...

* Thunderstorm chances will mainly persist through Saturday across
  Lincoln, Clark and Mohave counties through Saturday. FLash Flood
  Watches are in affect for Northern Mohave County and most of
  Lincoln County.

* Mostly dry conditions are expected late this weekend and into the
  next work week.

* The weekend starts off another steady warming trend.

&&

.DISCUSSION...Another active day likely today across mainly across
the eastern half of the forecast area, including Lincoln, Clark and
Mohave counties where scattered thunderstorms are already occurring.
Heavy rain and small hail are the greatest threat, but more
organized and potentially severe storms are possible across
northeast Clark and Lincoln Counties where we see the best shear and
upper dynamics. With PWATs still over an inch, flash flooding will
also remain a concern, especially since some of these storms will
likely be training over the mountains. Some storms are possible into
eastern San Bernardino County, but western portions of the county
and Inyo County should should not see any storms as drier air has
worked into the region. A Flash Flood Watch remains in place for
Lincoln and northern Mohave counties until 8pm this evening. Drier
air will begin to work into the region over the weekend, but
moisture will still remain in place across Clark, Mohave, and
Lincoln counties Saturday leading to another day of scattered
showers and thunderstorms with isolated severe storms as shear
numbers and upper dynamics look good across Clark and Mohave
counties.

The upper level pattern will shift into Friday night with a ridge
of high pressure tilting into the region. This will inhibit storm
chances by Sunday, with the exception of some slight chances for
isolated storms on some of the higher peaks. The high pressure will
continue to build into the work week, keeping the forecast dry.
Longer term models hint at the high pressure beginning to push east
by the next weekend, but that could be delayed further beyond the
forecast period.

The building high pressure will also kick off a warm trend over
the weekend with temperatures slowly rising back into the 100s and
110s by the middle of the next work week.

&&

.AVIATION...For Harry Reid...For the 18Z Forecast Package...
Light E to SE winds continue over the next few hours, increasing in
strength as afternoon mixing kicks in. Another round of convection
is expected across southern Nevada, with convective initiation
around the Valley as early as 19-20z expected. The best chance for
direct impacts in the terminal area will be 20Z to 23Z, with the
likely impacts being sudden gusty winds, heavy rainfall reducing
visibility to under 5SM, and CIGs briefly decreasing to below 8kft
AGL. Added a tempo group from 19-23z to account for convection in
the vicinity and erratic wind speeds and directions. Hi-res
guidance is hinting as a northeast wind push from dying convection
around or after 00z, will watch how storms evolve today and update
the forecast as needed, but for now have added NE winds beginning at
00z. Light and variable winds will return overnight. Away from areas
of convection, VFR conditions will prevail with SCT to BKN clouds
and bases remaining at or above 10kft AGL. Temperatures are expected
to remain below 100F once again today and remain below 100F through
the weekend.

For the rest of southern Nevada, northwest Arizona and southeast
California...For the 18Z Forecast Package...Thunderstorms are
expected to redevelop this afternoon and evening across southern
Nevada and northern Mohave County. Any storms could produce sudden
gusty winds, lightning, heavy rain reducing visibilities to below
5SM, and CIGs decreasing to below 8kft AGL. Added a tempo group from
23z-03z at both KEED and KIFP to account for convection in the
vicinity during that timeframe with erratic wind directions and
speeds expected. Hi-res guidance is in agreement that northerly flow
may set up within the Colorado River Valley tonight as storms die
and send outflow boundaries from the north, so have kept that in the
respective TAFs. Away from convective influences, south to southwest
winds of 10 to 15 knots with gusts to around 20 knots will develop.
Normal diurnal wind patterns expected further west at both KDAG and
KBIH with cigs remaining mainly clear. Conditions will improve
across the region overnight, with both convection and winds
diminishing.

&&

.SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report
any significant weather or impacts according to standard operating
procedures.

&&

DISCUSSION...Gorelow
AVIATION...Moore

For more forecast information...see us on our webpage:
https://weather.gov/lasvegas or follow us on Facebook and Twitter

In the hours before

Local storm report, Aug 14, 2:11 PM MST, 58 minutes before
Preliminary Local Storm Report
National Weather Service Las Vegas NV
211 PM PDT Fri Aug 14 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0500 PM     Tstm Wnd Dmg     2 S Meadview            35.97N 114.08W
08/09/2026                   Mohave             AZ   Public

            Photo shows roof damage from thunderstorm
            winds in Meadview, AZ.

&&

MS
Local storm report, Aug 14, 2:12 PM MST, 57 minutes before
Preliminary Local Storm Report
National Weather Service Las Vegas NV
212 PM PDT Fri Aug 14 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1230 PM     Tstm Wnd Dmg     7 E Mt. Charleston      36.27N 115.52W
08/12/2026                   Clark              NV   County Official

            Photo of flood control sensor shows damage
            due to thunderstorm winds.

&&

MS
Local storm report, Aug 14, 2:14 PM MST, 55 minutes before
Preliminary Local Storm Report
National Weather Service Las Vegas NV
214 PM PDT Fri Aug 14 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0342 PM     Flash Flood      1 WNW Amargosa Valley   36.65N 116.41W
08/13/2026                   Nye                NV   Dept of Highways

            Highway 95 is closed in both directions due
            to flooding.

&&

MS

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 14, 6:46 AM MSTSevere Thunderstorm WarningVEFMohave44 min
Aug 14, 10:18 AM MSTFlash Flood Warning Considerable damage threatVEFMohave3 hr
Aug 14, 1:17 PM MSTSevere Thunderstorm WarningVEFMohave43 min
Aug 14, 1:57 PM MSTAreal Flood AdvisoryVEFMohave3 hr
Aug 14, 2:02 PM MSTSevere Thunderstorm WarningVEFMohave43 min
Aug 14, 2:39 PM MSTSevere Thunderstorm WarningVEFMohave51 min
Aug 14, 2:44 PM MSTAreal Flood AdvisoryVEFMohave95 min
Aug 14, 3:36 PM MSTSevere Thunderstorm WarningVEFMohave39 min
Aug 14, 4:00 PM MSTFlash Flood Warning Considerable damage threatVEFMohave6 hr
Aug 14, 4:14 PM MSTSevere Thunderstorm WarningVEFMohave46 min
Aug 14, 4:19 PM MSTFlash Flood Warning Considerable damage threatVEFMohave5 hr
Aug 13, 5:14 PM MSTAreal Flood AdvisoryVEFClark3 hr
Aug 14, 12:17 PM MSTAreal Flood AdvisoryVEFLincoln3 hr
Aug 14, 12:23 PM MSTSevere Thunderstorm WarningVEFClark, Lincoln52 min
Aug 14, 12:45 PM MSTFlash Flood Warning Considerable damage threatVEFClark3 hr
Aug 14, 12:55 PM MSTFlash Flood Warning Considerable damage threatVEFLincoln3 hr
Aug 14, 1:11 PM MSTSevere Thunderstorm WarningVEFClark, Lincoln49 min
Aug 14, 1:52 PM MSTAreal Flood AdvisoryVEFClark3 hr
Aug 14, 1:59 PM MSTSevere Thunderstorm WarningVEFClark46 min
Aug 14, 3:29 PM MSTAreal Flood WarningVEFLincoln3 hr
Aug 14, 3:50 PM MSTSevere Thunderstorm WarningVEFClark40 min
Aug 14, 4:39 PM MSTAreal Flood AdvisoryVEFClark, Lincoln3 hr

Nearby

Flash Flood Warnings in Arizona, 2026Flash Flood Warnings in Nevada, 2026Every flash flood warning in 2026

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.