Flash Flood Warning 11, NWS Las Vegas, NV

214 
WGUS75 KVEF 190044
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
544 PM PDT Sat Jul 18 2026

AZC015-190230-
/O.CON.KVEF.FF.W.0011.000000T0000Z-260719T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
544 PM MST Sat Jul 18 2026

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 PM MST THIS
EVENING FOR NORTHEASTERN MOHAVE COUNTY...

At 544 PM MST, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 1 and 2 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...
  Diamond Creek Campground.

This includes the Colorado River between mile markers 217 and 238.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3569 11333 3571 11366 3583 11354 3588 11331
      3586 11331 3584 11333

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

$$

AG

955 
WGUS75 KVEF 190223
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
723 PM PDT Sat Jul 18 2026

AZC015-190233-
/O.EXP.KVEF.FF.W.0011.000000T0000Z-260719T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
723 PM MST Sat Jul 18 2026

...FLASH FLOOD WARNING WILL EXPIRE AT 730 PM MST THIS EVENING FOR
NORTHEASTERN MOHAVE COUNTY...

Flood waters have receded. The heavy rain has ended. Flooding is no
longer expected to pose a threat. Please continue to heed remaining
road closures.

&&

LAT...LON 3569 11333 3571 11366 3583 11354 3588 11331
      3586 11331 3584 11333

$$

AG

Area Forecast Discussion
National Weather Service Las Vegas NV
430 PM PDT Sat Jul 18 2026

.KEY MESSAGES...

* Monsoonal moisture remains in place over the region through next
  week, maintaining daily thunderstorm chances.

* Seasonably hot temperatures continue, though little relief will
  be felt overnight as moisture and cloud cover result in mild low
  temperatures.

&&

.DISCUSSION...

Early this afternoon, isolated convection has already started
forming over the higher terrain of southeastern Nevada and
northwestern Arizona, with additional development expected through
this afternoon and into this evening. Overall, coverage is
expected to be less than what was observed on Friday afternoon and
evening, through locally heavy rain and flooding remain concerns,
especially for any locations that received appreciable rainfall
previous days. Instability is expected to generally range from 500
to 1000 J/kg, maximized across southern Mohave County. However, 0
to 6 km shear remains weak, around 10 to 20 KT, which will result
in slow storm motion and additional convective development away
from the higher terrain largely dependent on outflow boundary
interactions. Additionally, while DCAPE has decreased
substantially over the last week due to the influx of monsoonal
moisture, model soundings still indicate locations across Lincoln,
Clark, and Mohave Counties with around 500 to 1000 J/kg of DCAPE,
so gusty downburst winds also remain a threat with the stronger
storms that develop. Convective activity will begin waning after
sunset, though storms over southwestern Utah this evening could
send outflow boundaries southwestward across northern Mohave,
southern Lincoln, and into Clark County/the Las Vegas Valley
tonight. A similar set-up is expected on Sunday, though showers
may develop during late morning, with a westward expansion of
thunderstorm chances during the afternoon and evening.
Thunderstorms remain in the forecast each day through the upcoming
week, especially across northern and eastern portions of the
forecast area as precipitable water values remain 2 to 3 standard
deviations above normal. Ensembles indicate a weak inverted
trough/easterly wave that will translate westward midweek,
potentially resulting in an uptick in thunderstorm activity
Wednesday into Thursday. Thereafter, there is quite a bit more
uncertainty in the evolution of the upper pattern as a trough
takes shape off of the Pacific Northwest, which could, in turn,
displace the ridge over the Four Corners Region, so stay tuned.

In addition to daily thunderstorm chances, each day through next
week will also remain hot and muggy. While afternoon high
temperatures will be near seasonal normals, the abundant moisture
and lingering overnight cloud cover due to afternoon and evening
thunderstorms will maintain above normal low temperatures. Thus,
little relief will be felt overnight, and we will continue to
observe widespread Minor and Moderate (Level 1 and 2) Heat Risk
each day. Those who will be outdoors will need to ensure they stay
hydrated and take breaks in the air conditioning whenever
possible.

&&

.AVIATION...For Harry Reid...For the 00Z Forecast
Package...Convection chances and coverage this afternoon and
evening will be limited, with any thunderstorms remaining mainly
over the higher terrain surrounding the valley. Some guidance
continues to show the potential for a northeast push from storms
over southwestern Utah around 04/05UTC. However, chances of this
occurring are around 20%. Regardless of whether the northeast push
occurs, typical diurnal southwesterly winds are expected
overnight. Away from any convection that does develop over
southern Nevada, VFR conditions will prevail with SCT to BKN
clouds and bases remaining AOA 12kft AGL into Sunday. Convective
coverage over southern Nevada is expected to increase on Sunday,
with thunderstorms returning to the higher terrain surrounding the
valley.

For the rest of southern Nevada, northwest Arizona and southeast
California...For the 00Z Forecast Package...Winds will generally
remain light, 10 knots or less, and will favor a southerly to
westerly direction through the rest of the afternoon. One
exception is the northern Owens Valley, including KBIH, where
breezy southeasterly winds will continue into the evening hours.
The other exception will be the western Mojave Desert, including
KDAG, where westerly winds will increase around sunset. Convective
chances will be limited to the higher terrain in Clark, Lincoln,
and Mohave counties for the rest of the afternoon and evening. An
isolated storm also cannot be ruled out over the eastern Sierra
slopes in northern Inyo County. Erratic gusty winds, low CIGS,
heavy rain, and lightning are expected to accompany any storms
that develop. Any convection that does develop will wane after
sunset and light winds favoring typical overnight patterns should
prevail tonight. Away from convection, VFR conditions will prevail
with SCT clouds and bases remaining AOA 10kft AGL into Sunday.
Convective coverage over southern Nevada and northwest Arizona is
expected to increase on Sunday.

&&

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

&&

DISCUSSION...Phillipson
AVIATION...Stessman

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

Preliminary Local Storm Report
National Weather Service Las Vegas NV
257 PM PDT Sat Jul 18 2026

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

0148 PM     Flash Flood      3 N Hualapai Peak       35.11N 113.90W
07/18/2026                   Mohave             AZ   Park/Forest Srvc

            Video shows water flowing over the roadway
            with rocks and debris covering the road.

&&

MS

Preliminary Local Storm Report
National Weather Service Las Vegas NV
303 PM PDT Sat Jul 18 2026

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

0521 PM     Flash Flood      Kingman                 35.18N 114.05W
07/17/2026                   Mohave             AZ   Public

            Video shows water flowing under the wash
            that runs under Old Trails Road. Water is
            backing up into 1st Ave.

&&

MS

Preliminary Local Storm Report
National Weather Service Las Vegas NV
343 PM PDT Sat Jul 18 2026

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

0800 PM     Flood            3 SSE Willow Valley     34.87N 114.58W
07/17/2026                   Mohave             AZ   Public

            Photo shows backyard inundated with standing
            water.

&&

MS