Severe Thunderstorm Warning 45, NWS Las Vegas, NV

130 
WWUS55 KVEF 060254
SVSVEF

Severe Weather Statement
National Weather Service Las Vegas NV
754 PM PDT TUE SEP 5 2017

AZC015-NVC003-060315-
/O.CON.KVEF.SV.W.0045.000000T0000Z-170906T0315Z/
Mohave AZ-Clark NV-
754 PM PDT TUE SEP 5 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM
PDT/815 PM MST/ FOR WEST CENTRAL MOHAVE AND EAST CENTRAL CLARK
COUNTIES...

At 752 PM PDT/752 PM MST/, a strong outflow winds from severe 
thunderstorms were located over Lake Las Vegas, moving northwest at 
30 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect damage to roofs, siding, and trees. Strong winds can 
         create dangerous wave conditions on lakes.

Locations impacted include...
Boulder City, Las Vegas Bay, Lake Las Vegas, Echo Bay, Boulder Beach,
Boulder Beach Campground, Las Vegas Bay Campground, Echo Bay
Campground, Callville Bay, Meadview, Hoover Dam, Grand Canyon Ranch,
Callville Bay Campground, Lake Mead National Recreation Area, Temple
Bar Campground, South Cove and Temple Bar.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Wind damage with this storm will occur before any rain or lightning.
Do not wait for the sound of thunder before taking cover. SEEK
SHELTER IMMEDIATELY inside a sturdy structure and stay away from
windows.

If on or near Lake Mead, get away from the water and move indoors or 
inside a vehicle. remember, lightning can strike out to 15 miles 
from the parent thunderstorm. If you can hear thunder, you are close 
enough to be struck by lightning.  Move to safe shelter now! Strong 
winds ahead of the storms will create dangerous waves on the lake. 
Do not be caught on the water in a thunderstorm.

&&

LAT...LON 3635 11441 3628 11397 3584 11398 3590 11480
      3614 11492 3626 11450
TIME...MOT...LOC 0252Z 122DEG 24KT 3610 11490 

HAIL...<.75IN
WIND...60MPH
 
$$

Wolcott

796 
WWUS55 KVEF 060310
SVSVEF

Severe Weather Statement
National Weather Service Las Vegas NV
810 PM PDT TUE SEP 5 2017

AZC015-NVC003-060316-
/O.EXP.KVEF.SV.W.0045.000000T0000Z-170906T0315Z/
Mohave AZ-Clark NV-
810 PM PDT TUE SEP 5 2017

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL MOHAVE AND EAST
CENTRAL CLARK COUNTIES WILL EXPIRE AT 815 PM PDT/815 PM MST/...
        
The gust front from severe thunderstorms which prompted the warning 
has moved out of the area. Therefore the warning will be allowed to 
expire. However gusty winds of 35 to 45 MPH through 9 PM.

LAT...LON 3635 11441 3628 11397 3584 11398 3590 11480
      3614 11492 3626 11450
TIME...MOT...LOC 0306Z 122DEG 24KT 3614 11498 

$$

Wolcott

Area Forecast Discussion
National Weather Service Las Vegas NV
255 PM PDT Tue Sep 5 2017

.SYNOPSIS...Isolated to scattered showers and thunderstorms are
expected through this evening and again Wednesday afternoon and
evening. The area of focus for thunderstorms will be northwest
Arizona and Southern Nevada. After a brief push of drier air
Thursday, a surge of monsoon moisture will increase rain chances
across the southern Great Basin and Mojave Desert Friday and
Saturday. Temperatures will drop down to below normal by Friday and
Saturday.
&&

.SHORT TERM...today through Thursday

Low grade monsoon pattern still in place today and will persist
through Wednesday with high pressure persisting over Utah. The
resultant east to southeast flow will keep just enough moisture and
instability over the area for isolated to scattered thunderstorms
mainly over southern Nevada and northwest Arizona. Temperatures will
remain a little above normal. A shortwave trough will push northeast
through northern California Wednesday night and Thursday which will
push some drier air into the area, limiting thunderstorm chances
Thursday to mainly Mohave County and portions of Lincoln County.
This feature will also cause an increase in southerly winds with
breezy conditions likely over much of the forecast area.

.LONG TERM...Friday through Tuesday.

Friday and Saturday should see increasing thunderstorm coverage
along with the potential for more extensive heavy rain than the past
couple weeks as tropical moisture off the coast of west central
Mexico is tapped and drawn up into our region. A large closed low is
forecast to be spinning off the central California Coast Friday and
the resulting enhanced southerly flow between it and an area of high
pressure centered over New Mexico will be favorable for pulling deep
moisture our way. The ECMWF and GFS solutions are both in fairly
good agreement with this scenario and the GFS brings precipitable
water values around 1.5 inches up the Colorado River Valley into
southern Nevada Friday night and Saturday. The closed low is
forecast to dig a little closer to southern California by Saturday
which would put much of our forecast area near the northeast
quadrant of the low where diffluence would favor broad upward
forcing and favor some storm training in moderate southerly steering
flow.

POP values were increased to the 30-40 percent range across southern
Nevada and northwest Arizona Friday the expanded to the west and
northwest across San Bernardino and Inyo counties Saturday. However,
it appears dry air will remain over the southern Sierra and Owens
Valley. There will still be lingering moisture Sunday, but much of
the deeper moisture is forecast to be lifted away from our region
early next week and replaced by dry southwest flow as the coastal
low slowly moves toward northern California and works its way
inland. High temperatures were also lowered Friday into the weekend
with the moisture increase then highs climb early next week as drier
air spreads overhead and the ridge shifts more over Arizona and Utah.
&&

.AVIATION...For McCarran...Generally, winds should remain light and
diurnal through most of the forecast period. Scattered showers and
thunderstorms are possible within all corridors this afternoon and
the early evening, with the better chances in the Peach Springs and
Mormon Mesa corridors. With scattered chances across much of the
region today, various outflow scenarios could make it to the Las
Vegas valley, which would create erratic and gusty winds. Confidence
remains low on the magnitude and direction of these outflow winds
for today, but could likely favor a southerly direction. There also
exists a slight chance of showers and thunderstorms overnight in the
valley, including the terminal. Ceilings should remain above 15 kft
with the potential of slightly lower ceilings with any storm
activity.

For the rest of southern Nevada, northwest Arizona and southeast
California...Isolated to scattered thunderstorms are possible across
much of the region this afternoon and evening, with highest chances
across the Mohave County and along the higher terrain. Gusty outflow
winds will be the primary concern with any thunderstorm activity
that develops this afternoon and evening. Otherwise, light diurnal
winds are expected. SCT to BKN above 15kft through the forecast
period with slightly lower ceilings associated with nearby storm
activity. The rest of the region will see generally light diurnal
winds with FEW to SCT above 14kft.
&&

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

SHORT TERM...Harrison
AVIATION...Kryston
LONG TERM...Adair

For more forecast information...see us on our webpage:

http://weather.gov/lasvegas or follow us on Facebook and Twitter

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS NV
711 PM PDT TUE SEP 5 2017

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

0706 PM     TSTM WND GST     11 NNW DOLAN SPRINGS    35.74N 114.35W
09/05/2017  M65 MPH          MOHAVE             AZ   PUBLIC

            THUNDERSTORM WIND GUST MEASURED BY SPOTTER.
            ALSO REPORTING DENSE BLOWING DUST AND
            SHINGLE DAMAGE TO THEIR ROOF.

&&

CO

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS NV
712 PM PDT TUE SEP 5 2017

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

0711 PM     TSTM WND GST     4 NNE BULLHEAD CITY     35.15N 114.56W
09/05/2017  E61 MPH          MOHAVE             AZ   ASOS

            BULLHEAD CITY ASOS REPORTED A PEAK
            THUNDERSTORM WIND GUST TO 61 MPH ALONG WITH
            REDUCED VISIBILITY AND HAZE.

&&

CO