Flash Flood Warning 187, NWS Las Vegas, NV

Area Forecast Discussion
National Weather Service Las Vegas NV
1137 AM PDT Mon Aug 15 2022

.SYNOPSIS...Afternoon thunderstorm chances to persist through the
week, bringing the potential for heavy rain and flash flooding.
Temperatures remain below-normal due to monsoon moisture and rain
chances.
&&

.SHORT TERM...Today and Tuesday.

Morning satellite imagery depicts an MCV positioned over central
Mohave County, collocated with abundant cloud cover that
stretches up into northeastern Utah. These clouds are expected to
erode this afternoon, allowing Mohave and eastern Clark Counties
to destabilized, albeit a bit delayed and less than typical. This
may temper afternoon storm activity across the county, but with
deep moisture and the MCV present, heavy rain and flash flooding
remain likely with any storms. As such, a flash flood watch
remains in effect for Mohave County through tonight. Elsewhere,
where skies are clearer, scattered storms are expected to develop
along the higher terrain. Morning CAMs show activity spreading
farther west than yesterday, possibly into Death Valley and the
Sierra. Given the more isolated coverage outside of Mohave County,
the flash flood watches for these areas were allowed to expire,
though flash flooding will remain possible with any storm. Think
we'll have keep an eye out for a potential northeast event this
evening, as the MCV over Mohave County places the I-15 corridor
between Vegas and St. George under northeasterly flow. We almost
got one last night, and the setup looks more favorable today. Hi-
res guidance doesn't seem too keen on this idea, perhaps due to
the cloud cover currently in the area. However, these clouds
should erode this afternoon and Lincoln County is already clear,
so storms should develop and propagate south-southwest. Whether
they make it into the Las Vegas Valley remains uncertain, but the
potential is there. Heavy rain, flash flooding, and strong winds
would be possible should this scenario occur.

Tomorrow, activity continues to spread west, with scattered
thunderstorms possible across the entire CWA. Latest HREF suggests
the greatest coverage will be southeast of I-15, but shows scattered
development out into Inyo and Esmeralda Counties. While these areas
have gotten a much needed break, they remain very vulnerable to
flash flooding and their thunderstorm potential will need to be
monitored closely. Otherwise, tomorrow looks to be more of the
same, with afternoon thunderstorms and below-normal temperatures.

.LONG TERM...Wednesday through the weekend.

Synoptic-scale south-southeast flow is expected to persist through
the week, keeping moisture and storm chances around. Not seeing much
in the way of larger-scale forcing mechanisms in ensemble guidance,
so mesoscale features will be key. This means that pinpointing areas
of greatest activity is likely going to be a day-by-day process.
Nonetheless, heavy rain and flash flooding will continue to be the
main hazards. As we head into the weekend, things become a little
more interesting as the remnants of a Gulf of Mexico tropical system
slide under the ridge and into southern Arizona. Guidance generally
keeps this system south and east of our area, but this hinges on the
timing of a westerly shortwave and the strength of the ridge.
Changes in these details will likely alter the trajectory of
tropical remnants/inverted trough. Should the system impact our
area, it will bring the potential for widespread heavy rainfall;
however, uncertainty remains high at this moment. What is more
certain is the continuation of below-normal temperatures with the
persistent moisture and rain chances.
&&

.AVIATION...For Harry Reid...Generally minor impacts expected today
with light winds through the majority of the TAF period. Another
opportunity for gusty outflow winds this afternoon due to monsoonal
thunderstorms in the vicinity of the LV valley but confidence is
quite low. However, maintained TEMPO group for this potential this
afternoon and evening. Quieter conditions overnight with FEW-SCT
clouds around 12-15k feet along with light winds. Similar conditions
expected Tuesday with Isolated afternoon thunderstorms and generally
easterly winds outside of any thunderstorm influences.

For the rest of southern Nevada, northwest Arizona and southeast
California...Lesser overall coverage of monsoonal thunderstorms
expected across the region today, with the exception of Mohave
County where thunderstorm coverage is expected to be more scattered.
However, any storms that develop will likely produce outflows and if
so, the terminals with the best potential for impacts would be
KIFP/KEED as well as KVGT/KHND. Otherwise, generally light winds
expected across the region today. Similar conditions are expected
Tuesday with scattered afternoon thunderstorms, mainly over the
eastern half of the area.
&&

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

DISCUSSION...Woods
AVIATION...Gorelow

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
1214 PM PDT MON AUG 15 2022

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

0335 PM     TSTM WND GST     3 SE WILLOW VALLEY      34.88N 114.57W
08/14/2022  M58 MPH          MOHAVE             AZ   MESONET

            58 MPH WIND GUST RECORDED AT MOHAVE-2 AZMET
            MESONET SITE. TIME ESTIMATE BY RADAR.

&&

CO

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1231 PM PDT MON AUG 15 2022

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

0415 PM     FLASH FLOOD      3 SW VALENTINE          35.36N 113.70W
08/14/2022                   MOHAVE             AZ   COUNTY OFFICIAL

            MOHAVE ROADS REPORTS HACKBERRY RD IS CLOSED
            FROM AUSTIN PEAK TO MAIN ST DUE TO WEATHER.
            TIME ESTIMATED BY RADAR.

0455 PM     FLASH FLOOD      5 WSW WIKIEUP           34.68N 113.69W
08/14/2022                   MOHAVE             AZ   COUNTY OFFICIAL

            MOHAVE ROADS REPORTS CHICKEN SPRINGS RD IS
            CLOSED FROM HWY 93 TO ALAMO RD DUE TO
            WEATHER. TIME ESTIMATE FROM RADAR.

1125 PM     FLASH FLOOD      15 NW VALENTINE         35.52N 113.86W
08/14/2022                   MOHAVE             AZ   COUNTY OFFICIAL

            MOHAVE ROADS REPORTS ANTARES RD IS CLOSED
            FROM HWY 66 TO PIERCE FERRY RD DUE TO
            WEATHER. TIME ESTIMATED BY RADAR.

&&

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE LAS VEGAS NV
1244 PM PDT MON AUG 15 2022

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

0348 PM     FLASH FLOOD      18 S NEEDLES            34.59N 114.63W
08/14/2022                   SAN BERNARDINO     CA   LAW ENFORCEMENT

            CHP REPORT OF ROADWAY FLOODING, WITH 4
            VEHICLES STUCK IN THE WATER.

0250 PM     FLASH FLOOD      4 WNW GOLDEN VALLEY     35.26N 114.29W
08/14/2022                   MOHAVE             AZ   COUNTY OFFICIAL

            MOHAVE COUNTY OFFICIALS CLOSED NORTH
            ESTRELLA ROAD FROM WEST CHINO DRIVE TO WEST
            ZUNI DRIVE DUE TO FLASH FLOODING.

0325 PM     FLASH FLOOD      6 ESE KINGMAN           35.16N 113.96W
08/14/2022                   MOHAVE             AZ   TRAINED SPOTTER

            SPOTTER REPORTED FLOODING ON HUALAPAI
            MOUNTAIN ROAD AT MILE MARKER 5.

0330 PM     FLASH FLOOD      5 SSW GOLDEN VALLEY     35.16N 114.24W
08/14/2022                   MOHAVE             AZ   COUNTY OFFICIAL

            MOHAVE COUNTY OFFICIALS CLOSED WEST
            SHINARUMP DRIVE FROM SOUTH GARNET ROAD TO
            SOUTH COLORADO ROAD DUE TO FLASH FLOODING.

0335 PM     TSTM WND GST     3 SE WILLOW VALLEY      34.88N 114.57W
08/14/2022  M58 MPH          MOHAVE             AZ   MESONET

            58 MPH WIND GUST RECORDED AT MOHAVE-2 AZMET
            MESONET SITE. TIME ESTIMATE BY RADAR.

0345 PM     FLASH FLOOD      8 SSW GOLDEN VALLEY     35.12N 114.26W
08/14/2022                   MOHAVE             AZ   COUNTY OFFICIAL

            MOHAVE COUNTY ROADS REPORTS THAT SOUTH
            GARNET ROAD CLOSED FROM WEST NAVAJO ROAD TO
            WEST SHINARUMP DRIVE DUE TO FLOODING.

0415 PM     FLASH FLOOD      3 SW VALENTINE          35.36N 113.70W
08/14/2022                   MOHAVE             AZ   COUNTY OFFICIAL

            MOHAVE ROADS REPORTS HACKBERRY RD IS CLOSED
            FROM AUSTIN PEAK TO MAIN ST DUE TO WEATHER.
            TIME ESTIMATED BY RADAR.

0425 PM     FLASH FLOOD      5 WSW GOLDEN VALLEY     35.19N 114.31W
08/14/2022                   MOHAVE             AZ   COUNTY OFFICIAL

            MOHAVE ROADS REPORTS S EGAR ROAD CLOSED FROM
            W ABRIGO DR TO W SHINARUMP DR DUE TO FLASH
            FLOODING. 2.48 OF RAIN IN 1 HOUR NEARBY.

0430 PM     FLASH FLOOD      10 ENE OATMAN           35.07N 114.22W
08/14/2022                   MOHAVE             AZ   COUNTY OFFICIAL

            MOHAVE ROADS REPORTS OATMAN HWY CLOSED FROM
            MM40 TO E SILVER CREEK RD DUE TO FLASH
            FLOODING.

0435 PM     FLASH FLOOD      5 WNW GOLDEN VALLEY     35.24N 114.31W
08/14/2022                   MOHAVE             AZ   COUNTY OFFICIAL

            MOHAVE ROADS REPORTS N EGAR RD CLOSED FROM W
            CHINO DR TO W AQUA FRIA DR DUE TO FLASH
            FLOODING.

0445 PM     FLASH FLOOD      4 SSE CHLORIDE          35.36N 114.17W
08/14/2022                   MOHAVE             AZ   COUNTY OFFICIAL

            MOHAVE ROADS REPORTS N MINERAL PARK RD
            CLOSED FROM HWY 93 TO MINE ENTRANCE DUE TO
            FLASH FLOODING.

0455 PM     FLASH FLOOD      5 WSW WIKIEUP           34.68N 113.69W
08/14/2022                   MOHAVE             AZ   COUNTY OFFICIAL

            MOHAVE ROADS REPORTS CHICKEN SPRINGS RD IS
            CLOSED FROM HWY 93 TO ALAMO RD DUE TO
            WEATHER. TIME ESTIMATE FROM RADAR.

1125 PM     FLASH FLOOD      15 NW VALENTINE         35.52N 113.86W
08/14/2022                   MOHAVE             AZ   COUNTY OFFICIAL

            MOHAVE ROADS REPORTS ANTARES RD IS CLOSED
            FROM HWY 66 TO PIERCE FERRY RD DUE TO
            WEATHER. TIME ESTIMATED BY RADAR.

1220 AM     FLASH FLOOD      6 SSW CHLORIDE          35.33N 114.24W
08/15/2022                   MOHAVE             AZ   COUNTY OFFICIAL

            MOHAVE COUNTY ROADS REPORTED HERMIT DR
            CLOSED FROM HIGHWAY 93 TO TEDDY ROOSEVELT
            DRIVE DUE TO FLOODING.

0250 AM     FLASH FLOOD      4 WNW GOLDEN VALLEY     35.23N 114.29W
08/15/2022                   MOHAVE             AZ   COUNTY OFFICIAL

            MOHAVE COUNTY ROADS REPORTED ESTRELLA DRIVE
            CLOSED BETWEEN CHINO AND ZUNI DRIVE DUE TO
            FLOODING.

&&

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS NV
132 PM PDT MON AUG 15 2022

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

0200 AM     FLASH FLOOD      10 ENE OATMAN           35.07N 114.22W
08/15/2022                   MOHAVE             AZ   NEWSPAPER

            SWIFT WATER RESCUE NEAR MILE POST 40 ON
            OATMAN ROAD. VEHICLE WAS STRANDED ON FLOODED
            ROADWAY.

&&

MW