Flash Flood Warning 69, NWS Las Vegas, NV

342 
WGUS75 KVEF 311959
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
1259 PM PDT Sun Jul 31 2022

AZC015-312115-
/O.CON.KVEF.FF.W.0069.000000T0000Z-220731T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
1259 PM MST Sun Jul 31 2022

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 215 PM MST THIS 
AFTERNOON FOR WEST CENTRAL MOHAVE COUNTY...

At 1259 PM MST, Doppler radar 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.

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

Some locations that will experience flash flooding include...
  Pierce Ferry And Antares Roads, Grand Canyon Ranch, Dolan Springs, 
  Packsaddle Campground, Windy Point Campground, Meadview, Temple 
  Bar Campground, Temple Bar and Peach Springs.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3604 11414 3588 11382 3579 11372 3569 11336
      3558 11336 3553 11351 3534 11386 3543 11416
      3542 11427 3560 11439 3560 11465 3565 11469
      3614 11451 3613 11451 3610 11433 3608 11431
      3606 11431 3601 11424 3602 11415

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

$$

JV

926 
WGUS75 KVEF 312046
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
146 PM PDT Sun Jul 31 2022

AZC015-312115-
/O.CON.KVEF.FF.W.0069.000000T0000Z-220731T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
146 PM MST Sun Jul 31 2022

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 215 PM MST THIS 
AFTERNOON FOR WEST CENTRAL MOHAVE COUNTY...

At 146 PM MST, a thunderstorm was producing heavy rain south of 
Willow Beach on the western side of Highway 93 in Mohave County. 
Additionally, storms were beginning to develop between Dolan Springs 
and Valentine potentially impacting Piece Ferry, Stockton Hill, and 
Anteras Point Roads 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...
  Pierce Ferry And Antares Roads, Grand Canyon Ranch, Dolan Springs, 
  Packsaddle Campground, Windy Point Campground, Meadview, Temple 
  Bar Campground, Temple Bar and Peach Springs.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3604 11414 3588 11382 3579 11372 3569 11336
      3558 11336 3553 11351 3534 11386 3543 11416
      3542 11427 3560 11439 3560 11465 3565 11469
      3614 11451 3613 11451 3610 11433 3608 11431
      3606 11431 3601 11424 3602 11415

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

$$

JS

959 
WGUS55 KVEF 312106
FFWVEF
AZC015-312300-
/O.EXT.KVEF.FF.W.0069.000000T0000Z-220731T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
206 PM PDT Sun Jul 31 2022

The National Weather Service in Las Vegas has extended the

* Flash Flood Warning for...
  West Central Mohave County in northwestern Arizona...

* Until 400 PM MST.

* At 206 PM MST, A thunderstorm was producing heavy rain south of 
  Willow Beach on the western side of Highway 93 in Mohave County. 
  Additionally, storms were beginning to develop between Dolan 
  Springs and Valentine potentially impacting Piece Ferry, Stockton 
  Hill, and Antares Point Roads 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...
  Pierce Ferry And Antares Roads, Grand Canyon Ranch, Dolan Springs, 
  Packsaddle Campground, Windy Point Campground, Meadview, Temple 
  Bar Campground, Temple Bar and Peach Springs.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3604 11414 3588 11382 3579 11372 3569 11336
      3558 11336 3553 11351 3534 11386 3543 11416
      3542 11427 3560 11439 3560 11465 3565 11469
      3614 11451 3613 11451 3610 11433 3608 11431
      3606 11431 3601 11424 3602 11415

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

$$

JV

033 
WGUS75 KVEF 312259
FFSVEF

Flash Flood Statement
National Weather Service Las Vegas NV
359 PM PDT Sun Jul 31 2022

AZC015-312309-
/O.EXP.KVEF.FF.W.0069.000000T0000Z-220731T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mohave AZ-
359 PM MST Sun Jul 31 2022

...FLASH FLOOD WARNING WILL EXPIRE AT 4 PM MST THIS AFTERNOON FOR 
WEST CENTRAL MOHAVE COUNTY...

This warning has been replaced by a new product, so this one has 
been allowed to expire. Heavy rain from isolated thunderstorms 
continue across central Mohave County capable of producing flash 
flooding.

LAT...LON 3604 11414 3588 11382 3579 11372 3569 11336
      3558 11336 3553 11351 3534 11386 3543 11416
      3542 11427 3560 11439 3560 11465 3565 11469
      3614 11451 3613 11451 3610 11433 3608 11431
      3606 11431 3601 11424 3602 11415

$$

JV

Area Forecast Discussion
National Weather Service Las Vegas NV
944 AM PDT Sun Jul 31 2022

.SYNOPSIS...Moist and unstable air will fuel threats for heavy rain
and flash flooding again today and Monday. After a brief respite
Tuesday through Thursday, chances for heavy rain will return Friday
through the weekend. The high humidity will help hold temperatures
down, especially in areas where rain occurs.
&&

.UPDATE...The first convection of the day is beginning to fire over
south central Clark County and the eastern portions of San
Bernardino County. The Flash Flood Watch in effect for today for the
western portions of the area looks good and no adjustments will be
made to the watch. Based on the latest hi-res data and observational
data, I expect to primary areas of convection. One over Inyo, San
Bernardino, Clark and Mohave Counties with storms generally moving
off to the north and a second area of central Nevada with these
storms propagating to the south and into the northern portions of
our forecast area over the course of the afternoon and early
evening. Flash Flooding will be the main concern of the data with
abundant moisture everywhere and relatively slow storm motion and
will be favoring the higher elevations. The morning sounding at KLAS
had in excess of 1500 J/kg of SBCAPE and PW values of 1.76 which
both are extremely anomalous, supporting the overall convective
activity and high rainfall rates. The monsoon was a bit slow to
start in July but has been quite active and will end the month on a
convective up note.
&&

.PREV DISCUSSION...
248 AM PDT Sun Jul 31 2022

.SHORT TERM...Through tonight. Early morning satellite loop showed
mid level debris clouds drifting over much of our CWA, with very few
radar returns associated with them. Surface obs showed temperatures
several degrees warmer than last night at most sites, reflective of
fewer thunderstorms this past evening than on Friday evening. One
exception was Bishop, where the temperature was 10 degrees cooler
and the dewpoint seven degrees higher than 24 hours ago due to the
effects of a thunderstorm that passed nearby several hours before.
Deep moisture remains in place again today, and the primary concern
is again flash flooding. High resolution models loosely agree on
afternoon thunderstorm development focusing over the higher terrain
of Inyo, San Bernardino, and Clark counties, with parts of Mohave
County lighting up a few hours later. There are also hints in the
late afternoon and early evening of a loosely organized east-west
line of storms developing over the central or southern Great Basin
and accelerating south as the cold pool intensifies. This line of
storms should not need a Flash Flood Watch due to the presumed rapid
motion and also having precipitable water of "only" about one inch
to feed on. On the other hand, precipitable water of 1.5 to two-plus
inches was present from southern Inyo County through all of Clark,
San Bernardino, and much of Mohave. After discussion with FGZ, chose
to leave Mohave out of the Watch for a change, as the HRRR was
showing less areal coverage of thunderstorms than in previous days.
Chose to issue a Watch for today for the Owens Valley, Death Valley,
the northern half of San Bernardino County, the Morongo Basin, and
the Spring Mountains of Clark County. As noted earlier,
thunderstorms should primarily focus on the higher terrain, with
impacts in Death Valley and the Owens Valley more likely to be in
the southern half of those zones and come either from storms which
drift off the mountains or runoff which flows down the mountains
into the valleys. Most activity should be done by early evening in
San Bernardino County, and the loosely organized line could persist
in Inyo, Esmeralda, Nye, Lincoln, and possibly even Clark County
until after midnight.

.LONG TERM...Monday through Saturday.
High pressure that has been bringing record heat to the Pacific
Northwest and northern Nevada will begin to migrate eastward,
allowing for a southerly flow, allowing for moisture to continue to
stream in from the eastern Pacific Ocean and Gulf of California. The
thunderstorm threat remains for Monday before a drying trend
midweek. Tuesday through Thursday, thunderstorms will be mainly in
the Great Basin and Mohave County. Our next monsoon surge looks to
arrive Friday with an increase in convection Friday going into the
weekend.  With the extremely moist atmosphere, expect temperatures
to remain below normal through the week.
&&

.AVIATION...For Harry Reid...Light east to southeast winds generally
less than 10 kts are expected to prevail at the terminal through
this evening.  Model guidance is indicating a better coverage of
convection over southern Nevada this afternoon.  While it is not
certain that storms will directly impact the field today, chances
are high enough to warrant a PROB30 group, which has been included
between 21Z and 02Z.  Winds are expected to go light and variable
once again overnight into Monday morning before scattered convection
returns Monday afternoon and evening.

For the rest of southern Nevada, northwest Arizona and southeast
California...Scattered thunderstorms will be more numerous across
the region this afternoon and evening, with all TAF sites, excluding
KIFP and KEED, having a PROB30 group included at some point during
the afternoon or evening.  Activity is expected to decrease
overnight before redeveloping again by Monday afternoon.  Outside of
thunderstorm activity, light winds of 10kts or less are expected at
all regional TAF sites.
&&

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

UPDATE...Czyzyk
SHORT TERM...Morgan
LONG TERM...Berc
AVIATION...Planz

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