Flash Flood Warning 36, NWS Las Vegas, NV

312 
WGUS75 KVEF 180026
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
526 PM PDT Thu Jul 17 2025

CAC071-NVC003-180300-
/O.CON.KVEF.FF.W.0036.000000T0000Z-250718T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Bernardino CA-Clark NV-
526 PM PDT Thu Jul 17 2025

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING 
FOR SAN BERNARDINO AND WEST CENTRAL CLARK COUNTIES...

At 526 PM PDT, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area. Most of the heaviest rain has moved 
south of Primm, but runoff is likely to continue over the next hour.

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

SOURCE...Radar.

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

Some locations that will experience flash flooding include...
  Primm.

This includes the following highways...
	Interstate 15 in Nevada between mile markers 1 and 10.
	Interstate 15 in California between mile markers 181 and 186.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3575 11541 3575 11538 3575 11532 3573 11529
      3567 11525 3565 11525 3563 11525 3556 11527
      3554 11531 3552 11538 3553 11545 3555 11551
      3560 11554 3562 11554 3564 11554 3572 11547

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

$$

AG

949 
WGUS75 KVEF 180252
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
752 PM PDT Thu Jul 17 2025

CAC071-NVC003-180302-
/O.EXP.KVEF.FF.W.0036.000000T0000Z-250718T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Bernardino CA-Clark NV-
752 PM PDT Thu Jul 17 2025

...FLASH FLOOD WARNING WILL EXPIRE AT 8 PM PDT THIS EVENING FOR SAN 
BERNARDINO AND WEST CENTRAL CLARK COUNTIES...

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

A Flood Watch remains in effect until 1100 PM PDT for portions of 
northwest Arizona and Nevada.

&&

LAT...LON 3575 11541 3575 11538 3575 11532 3573 11529
      3567 11525 3565 11525 3563 11525 3556 11527
      3554 11531 3552 11538 3553 11545 3555 11551
      3560 11554 3562 11554 3564 11554 3572 11547

$$

CM

Area Forecast Discussion
National Weather Service Las Vegas NV
438 PM PDT Thu Jul 17 2025

.KEY MESSAGES...

* Increased monsoonal moisture brings scattered showers and storms
  to the area through Saturday, with flash flooding and gusty
  outflow winds the main hazards.

* Below-normal temperatures today and Friday, with a gradual rebound
  to near seasonal values over the weekend and next week.

* Breezy southwest winds and drier conditions return next week as a
  trough sits off the West Coast.

&&

.DISCUSSION...through Wednesday.

Latest satellite imagery shows an MCV drifting NW through
southeastern portions of the CWA. This feature, along with the
terrain, will be the lifting mechanism for scattered convection
across Mohave, Clark, and Lincoln counties this afternoon. Flash
flooding and gusty outflow winds are the primary hazards. Due to the
increased moisture and forecast coverage of storms, opted to issue a
short-fused Flash Flood Watch for the aforementioned counties until
11PM. Farther west, convection and the subsequent hazards will be
more isolated in nature. Tomorrow, precipitation chances become more
widespread across the region, but the greatest coverage is expected
in northern Lincoln and central Nye counties. This area will have
the greatest risk of flash flooding. By Saturday, drier air begins
to move in from the west, bring precip chances down and largely
confining them Mohave and Lincoln counties, though an isolated storm
or two may develop on the Sierra and/or Spring Mountains.

Due to increased moisture and cloud cover, temperatures will be 5-10
degrees below normal for most of the area, particularly the eastern
half. As drier air moves in over the weekend and next week,
expecting a rebound to more seasonal values. This drier air will
also be accompanied by increased southwest winds as a trough sits
off the West Coast. Chances for impactful winds appear modest (under
30%) at this point, but breezes could be strong enough to elevate
fire weather conditions in areas that don't see much precipitation
over the next few days.

&&

.AVIATION...For Harry Reid...For the 00Z Forecast
Package...Primary concern continues to be convective activity
through ~06Z. Vicinity convection is likely (90%), but chances of
rain at the terminal are closer to ~50%. Should a storm move
overhead, brief downpours could result in MVFR or IFR conditions.
Otherwise, gusty outflow winds will be the main hazard. Gusts most
likely to be in the 25-40 knot range, but cannot rule out gusts
~50 knots if a storm moves over the terminal. Outside of
convective influences, winds should largely be from the south-
southeast at 8-12 knots and gusts up to 20 knots. Scattered to
broken clouds around 12kft, potentially dropping to 8-10kft if a
storm moves overhead. Another round of storms is expected to
develop by around midday Friday, with associated impacts expected
through late afternoon. Temperatures remain under 100F through the
forecast period.

For the rest of southern Nevada, northwest Arizona and southeast
California...For the 00Z Forecast Package...Scattered convection
to continue through the evening hours across northwestern AZ and
southeastern NV. Isolated shower/virga activity possible across
our California zones. Under the heaviest cores, brief downpours
could result in MVFR or IFR conditions. Outflow wind gusts 20-40
knots, possibly higher should a storm move over an airport.
Outside of convective influences, winds for most of the area will
be from the south, though across the Western Mojave, westerly
winds are favored, with variable winds in the Owens Valley.
Scattered to broken clouds around 12kft, potentially dropping to
8-10kft if a storm moves overhead.

&&

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

&&

DISCUSSION...Woods
AVIATION...Phillipson

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