Flash Flood Warning 15, NWS Las Vegas, NV

719 
WGUS75 KVEF 190310
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
810 PM PDT Mon Jul 18 2022

NVC003-190500-
/O.CON.KVEF.FF.W.0015.000000T0000Z-220719T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clark NV-
810 PM PDT Mon Jul 18 2022

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 10 PM PDT THIS 
EVENING FOR WEST CENTRAL CLARK COUNTY...

At 810 PM PDT, Doppler radar and automated rain gauges indicated 
thunderstorms producing heavy rain across the warned area. Flash 
flooding is ongoing or expected to begin shortly.

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

SOURCE...Radar and automated gauges.

IMPACT...Life-threatening flash flooding of low-water crossings,
         creeks, normally dry washes and roads.

Some locations that will experience flash flooding include...
  Pahrump, Rainbow Canyon, Spring Mountains, Mt. Charleston, Mary 
  Jane Falls Campground, Mcwilliams Campground, Dolomite Campground, 
  Fletcher View Campground, Kyle Canyon Campground, Mahogany Grove 
  Campground, Hilltop Campground, Lovell Canyon Campground and 
  Willow Creek Campground.

This includes portions of Highway 160 and Lee Canyon Road.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Flooding is occurring or is imminent. It is important to know where 
you are relative to washes, canyons, or streams which can become 
killers in heavy rains. Campers and hikers should avoid streams or 
washes.

&&

LAT...LON 3652 11563 3643 11548 3616 11555 3602 11565
      3593 11580 3594 11581 3597 11585 3598 11587
      3599 11588 3600 11589 3600 11590 3601 11590
      3616 11590 3620 11590 3624 11590 3631 11590
      3641 11583

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

$$

AN

760 
WGUS75 KVEF 190456
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
956 PM PDT Mon Jul 18 2022

NVC003-190506-
/O.EXP.KVEF.FF.W.0015.000000T0000Z-220719T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clark NV-
956 PM PDT Mon Jul 18 2022

...FLASH FLOOD WARNING WILL EXPIRE AT 10 PM PDT THIS EVENING FOR 
WEST CENTRAL CLARK COUNTY...

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

LAT...LON 3652 11563 3643 11548 3616 11555 3602 11565
      3593 11580 3594 11581 3597 11585 3598 11587
      3599 11588 3600 11589 3600 11590 3601 11590
      3616 11590 3620 11590 3624 11590 3631 11590
      3641 11583

$$

MS

Area Forecast Discussion
National Weather Service Las Vegas NV
1134 AM PDT Mon Jul 18 2022

.SYNOPSIS...Thunderstorm activity persists today before shifting
north tomorrow as hotter and drier conditions move in. Hot and
benign weather for the latter half of the week before moisture and
rain chances return over the weekend.
&&

.DISCUSSION...through the weekend.

Radar and satellite imagery show an MCV propagating up the
Colorado River Valley into southern Nevada. Ascent with this
feature has been sufficient to produce early morning showers and
storms in and around the river valley. With widespread, but
thinning, cloud cover over most of Clark and northern Mohave
Counties, expect convective redevelopment in these areas to be
delayed until later this afternoon. There are also some questions
regarding the extent of convective overturning in the Colorado
River Valley and southern Mohave County from the overnight storms.
This is reflected in the 12z HREF, which keeps most areas south
of I-40 dry this afternoon. However, skies over these areas have
already cleared and diurnal heating is well underway, so would not
be surprised to see convective development on the higher terrain
later today. Elsewhere, isolated to scattered thunderstorm
activity is expected this afternoon. With the MCV continuing
northward, greatest storm coverage will likely be in Lincoln and
northern Mohave Counties. With the lack of forcing in our other
areas, initiation should largely be tied to the high terrain.
Storms are anticipated in the Sierra, Spring, Sheep, and San
Bernardino mountains. These will try to move north-northwest off
the terrain. Gusty winds and lightning will be the primary
concerns, though localized heavy rain and flash flooding will be
possible with the strongest cores.

Tomorrow, the bulk of thunderstorm activity looks be focused in
central Nevada and the Sierra as the upper-level high begins to
shift west. This westward shift will largely shut off precip chances
and let the mercury rise. Highs in the latter half of the work week
are forecast to be around 110F here in Vegas, with Moderate HeatRisk
during this time. Outside of the heat, the weather should be rather
benign, with light afternoon breezes. As we head into the weekend
and next week, ensemble guidance suggests that the high will retreat
eastward, allowing moisture and precip chances to return.
&&

.AVIATION...For Harry Reid...Extensive area of cloud cover will
shift north by early afternoon allowing for more sunshine this
afternoon. This will help destabilize the airmass with isolated
showers or thunderstorms expected to develop around the valley
around 21Z. Those showers or thunderstorms could then impact the
valley between 22Z and 01Z with primarily gusty winds. After the
storms dissipate expect partly cloudy skies overnight through
Tuesday. Outside of the thunderstorm gusts, winds will favor an
easterly direction through early afternoon then a southerly
direction overnight and Tuesday.

For the rest of southern Nevada, northwest Arizona and southeast
California...Isolated showers and thunderstorms will impact much of
the region through this evening. The only exception will be the
lower Colorado River Valley with no thunderstorms mention in the
KEED and KIFP TAFs. Gusty outflow winds and localized heavy rain are
the primary concern. Away from thunderstorms winds will favor their
favored up valley direction in the afternoon and become down valley
overnight. Skies will be partly cloudy overnight and Tuesday with
greatest coverage of showers and thunderstorms expected across
central Nevada.
&&

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

DISCUSSION...Woods
AVIATION...Pierce

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
547 PM PDT MON JUL 18 2022

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

0304 PM     TSTM WND GST     4 SSE YERMO             34.85N 116.79W
07/18/2022  M60 MPH          SAN BERNARDINO     CA   MESONET

            KDAG ASOS RECORDED A THUNDERSTORM WIND GUST
            OF 60 MPH FROM THE NNW.

0350 PM     FLASH FLOOD      2 ENE YERMO             34.91N 116.78W
07/18/2022                   SAN BERNARDINO     CA   TRAINED SPOTTER

            TRAINED SPOTTER REPORTED FLOODING ON YERMO
            ROAD WEST OF MINNEOLA ROAD. THIS REPORT WAS
            LATER VERIFIED BY A VIDEO SHARED BY A MEMBER
            OF THE PUBLIC.

0420 PM     FLASH FLOOD      LENWOOD                 34.88N 117.10W
07/18/2022                   SAN BERNARDINO     CA   LAW ENFORCEMENT

            CHP REPORTS A VEHICLE STUCK IN FLOOD WATERS.

&&

MS