Flash Flood Warning 31, NWS Las Vegas, NV

806 
WGUS75 KVEF 242255
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
355 PM PDT Wed Jul 24 2024

CAC027-250030-
/O.CON.KVEF.FF.W.0031.000000T0000Z-240725T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Inyo CA-
355 PM PDT Wed Jul 24 2024

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 530 PM PDT THIS 
AFTERNOON FOR SOUTH CENTRAL INYO COUNTY...

At 355 PM PDT, Doppler radar indicated thunderstorms producing heavy 
rain near Panamint Springs. Between 1 and 2 inches of rain has 
fallen along the Inyo, Panamint, and Argus Mountain ranges. Flash 
flooding is ongoing or expected to begin shortly and may impact 
Highway 190 and 136.

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...
  Keeler and Darwin.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3658 11796 3680 11801 3687 11801 3692 11798
      3693 11797 3690 11788 3679 11776 3629 11748
      3622 11747 3618 11751 3612 11765 3611 11774
      3616 11785 3628 11794 3635 11797

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

$$

CO

822 
WGUS75 KVEF 250023
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
523 PM PDT Wed Jul 24 2024

CAC027-250033-
/O.EXP.KVEF.FF.W.0031.000000T0000Z-240725T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Inyo CA-
523 PM PDT Wed Jul 24 2024

...FLASH FLOOD WARNING WILL EXPIRE AT 530 PM PDT THIS AFTERNOON FOR 
SOUTH CENTRAL INYO COUNTY...

The heavy rain has ended. Lingering minor flooding remains possible 
along highway 136 near Keeler. Please continue to heed remaining 
road closures.

&&

LAT...LON 3658 11796 3680 11801 3687 11801 3692 11798
      3693 11797 3690 11788 3679 11776 3629 11748
      3622 11747 3618 11751 3612 11765 3611 11774
      3616 11785 3628 11794 3635 11797

$$

CO

Area Forecast Discussion
National Weather Service Las Vegas NV
1010 AM PDT Wed Jul 24 2024

.SYNOPSIS...Monsoonal moisture will result in the return of
afternoon showers and thunderstorms today and Thursday before
conditions dry out over the weekend. As conditions dry, temperatures
will cool back toward seasonal averages over the weekend. A ridge of
high pressure returns to the region next week, which will allow
temperatures to increase once again.
&&

.UPDATE...This morning's sounding boasts an impressive 1.52 inches
of precipitable water, which up 0.34 inches from yesterday morning.
As has been the case for the past week or so, this anomalous
moisture will help to fuel afternoon showers and thunderstorms
capable of producing heavy rain with the potential to result in
flash flooding. Even with this anomalous moisture aloft, the lower
levels of the atmosphere remain relatively dry, with an inverted V-
shape present on the sounding. This combined with the near 1,200
J/kg of DCAPE indicate that gusty outflow winds will also be a
threat with any storms that develop today. Today is expected to play
out similar to the past two days, with convection popping up in
areas of higher terrain later this morning/early this afternoon.
These storms will then move off the higher terrain, sending out
outflow boundaries as they collapse. These outflows will aid in the
development of additional convection downstream. Chances for
afternoon and early evening showers and thunderstorms will become
more limited on Thursday and Friday as we begin to dry out. An
incoming trough will bring breezy winds, more seasonal temperatures,
and dry conditions to the region over the weekend.

&&

.DISCUSSION...Today through Tuesday.

Monsoonal moisture trapped beneath a 500 mb center of high pressure
overhead will continue to return showers and thunderstorms to the
forecast area today and Thursday. Convection will begin over the
higher terrain in the late-morning before moving into valley
locations through the afternoon and evening. PWATs across the Mojave
Desert range from 1.25" to 1.75", meaning the risk of flash flooding
underneath strong or training storms persists across our southern
zones. In our northern zones across the southern Great Basin,
forecast HRRR soundings indicate around 1000 J/kg of CAPE, 1500-2000
J/kg of DCAPE, and 1.00-1.50" of PWAT. Though there is moisture
present, the low levels remain dry, which could result in damaging
winds near or beneath stronger cells. Convection Allowing Models
(CAMs) show similar timing today as the last few days, with
thunderstorms beginning late-morning and persisting into the
overnight hours as storm formation propagates on outflow
boundaries from prior storms.

Temperatures will continue to range 5 to 8 degrees above seasonal
averages. This, coupled with the humidity, makes the heat feel
oppressive. Despite failing to see widespread HeatRisk values of
Major-to-Extreme, the Excessive Heat Warning will continue through
11pm PDT tonight to account for the additional toll that this
increased humidity takes on people spending time outdoors.

Late-week into the weekend, a trough will push through the Pacific
Northwest, Intermountain West, and Great Basin enough to squash the
monsoonal high pressure. This trough will usher dry air into the
region while increasing gusty southwest winds and dropping
temperatures back down toward normal values for this time of year.

Heading into next week, the monsoonal ridge will return and center
itself over the Four Corners. Moisture advection will return PoPs to
northwestern Arizona each afternoon and rising heights will
increase temperatures back to above-average readings.
&&

.AVIATION...For Harry Reid...Once again, showers and thunderstorms
will initially form on the western and southern mountains
surrounding the Las Vegas Valley around 18Z. As the afternoon
progresses, chances of thunderstorms moving directly over the
terminal increase to 40 percent with chances tapering off through
07Z. Expect erratic, gusty winds from the direction of nearby
thunderstorms. Otherwise, winds will take on standard diurnal trends
involving east afternoon winds and southwest evening and overnight
winds between 8 and 10 kts. CIGs will be aoa 15 kft with the
exception of nearby thunderstorm activity dropping to aoa 10 kft.

For the rest of southern Nevada, northwest Arizona and southeast
California...Showers and thunderstorms will initially form
on higher terrain across the forecast area around 18Z before moving
into valley locations through the afternoon and evening. All TAF
sites have the potential for impacts from surrounding thunderstorms,
though KDAG will have the lowest chance with 20 percent. Otherwise,
winds will take on standard diurnal trends with wind speeds between
8 and 10 kts. CIGs will be aoa 15 kft with the exception of nearby
thunderstorm activity dropping to aoa 10 kft.
&&

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

&&

UPDATE...Stessman
DISCUSSION/AVIATION...Soulat

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