Flash Flood Warning 9, NWS Las Vegas, NV

767 
WGUS75 KVEF 180316
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
816 PM PDT Fri Jul 17 2026

CAC071-180445-
/O.CON.KVEF.FF.W.0009.000000T0000Z-260718T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Bernardino CA-
816 PM PDT Fri Jul 17 2026

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 945 PM PDT THIS
EVENING FOR SAN BERNARDINO COUNTY...

At 816 PM PDT, California Highway Patrol reports flash flooding at
Interstate 40 East and East Broadway Street in Needles and at US 95
and Five Mile Road. Up to 3.5 inches of rain have fallen. Flash
flooding is already occurring.

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

SOURCE...Law enforcement reported.

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

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

This includes Interstate 40 in California between mile markers 138
and 155.

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.

In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.

&&

LAT...LON 3468 11446 3468 11462 3495 11470 3496 11463
      3487 11463 3484 11459 3477 11455 3471 11447

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

$$

Stessman

967 
WGUS75 KVEF 180440
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
940 PM PDT Fri Jul 17 2026

CAC071-180450-
/O.EXP.KVEF.FF.W.0009.000000T0000Z-260718T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Bernardino CA-
940 PM PDT Fri Jul 17 2026

...FLASH FLOOD WARNING WILL EXPIRE AT 945 PM PDT THIS EVENING FOR SAN
BERNARDINO COUNTY...

The heaviest rain has ended, but light rain continues. Flash Flooding
is no longer expected to pose a threat. However, a Flood Warning
remains in effect until 1:00 am MST/PDT as flooding continues to pose
a threat. Please continue to heed remaining road closures.

&&

LAT...LON 3468 11446 3468 11462 3495 11470 3496 11463
      3487 11463 3484 11459 3477 11455 3471 11447

$$

Stessman

Area Forecast Discussion
National Weather Service Las Vegas NV
424 PM PDT Fri Jul 17 2026

.KEY MESSAGES...

* Abundant moisture will remain over the Desert Southwest into
  next week, with daily rounds of monsoon thunderstorms.

* Seasonably hot temperatures will persist with unusually warm
  overnight lows due to moisture and cloud cover.

&&

.DISCUSSION...
An active stretch of monsoon days is expected as abundant
moisture resides over the Desert Southwest. This is apparent from
the most recent Upper Air soundings from Las Vegas, each showing
precipitable water values exceeding 1.6 inches. The most active
convective days currently appear to be today and Saturday. With
ensembles indicating some slight drying early next week, less
widespread activity can be expected, but the chance for storms
will persist through the end of next week. In fact, medium- range
ensembles indicate a weak inverted trough feature may result in a
period of greater shower and thunderstorm activity mid to late
next week, though confidence in the timing/placement of this
feature is very low. We will continue to monitor trends as the
time draws closer. Regardless, expect thunderstorms to largely be
terrain and outflow driven with little movement owing to very weak
mid-level steering flow. This will result in an increased risk
for localized flash flooding, especially given the high water
content in the atmosphere. Lightning and gusty winds will also
accompany any thunderstorm. Looking into the long range timeframe,
the pattern generally looks to continue favoring a monsoon
pattern with at least a chance for isolated thunderstorms into
next weekend. As it commonly the case, areas of Mohave and Lincoln
counties into southwestern Utah will generally be geographically
preferred for thunderstorms. Be especially mindful if you have any
outdoor activities planned over the next week or so as
thunderstorms will remain in the forecast.

Afternoon high temperatures will generally remain right around
climatological normals. However, given the potential for
increased overnight cloud cover and abundant atmospheric moisture,
the air will struggle to cool down overnight. This will result in
some elevated heat risk potential, especially in the hotter
spots, including the Colorado River Valley and Death Valley.
Remain hydrated and avoid being outdoors during the hottest time
of the afternoon.

&&

.AVIATION...For Harry Reid...For the 00Z Forecast Package...
Convection south of the Las Vegas Valley should result in winds
shifting southerly between 2330Z and 0030Z.  While isolated
convection cannot be ruled out before 03Z, the probability of
occurrence has diminished for the terminal area.  If convection does
move into the valley, heavy rainfall, brief gusty winds, and CIGs of
6kft to 8kft AGL will be the main concerns. Winds will become light
and variable overnight, and light east winds are expected Saturday
morning. The chance of convection tomorrow will be low in the
valley, with the best chances being to the east.

For the rest of southern Nevada, northwest Arizona and southeast
California...For the 00Z Forecast Package...Away from convection,
light south to southeast winds will continue through this evening.
Breezy southeast winds will continue at KBIH, with gusts over 20
knots persisting through sunset. KDAG should see gusty west winds
develop around 00Z. Scattered thunderstorms remain possible this
evening across southern Nevada and Arizona. Any storms may produce
lightning, sudden gusty outflow winds, brief heavy rain, and CIGs
below 8kft. Confidence in thunderstorm chances remains low near the
Colorado River Valley, including KEED and KIFP, but isolated
convection can not be ruled out through 06Z. Outside of
precipitation, CIGs should remain AOA 12kft AGL. Drier conditions
are expected tomorrow, with typical wind patterns.

&&

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

&&

DISCUSSION...Austin
AVIATION...Planz

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