Area Forecast Discussion
Issued by NWS Las Vegas, NV

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FXUS65 KVEF 022245

Area Forecast Discussion
National Weather Service Las Vegas NV
245 PM PST Fri Dec 2 2016

.SYNOPSIS...High pressure will nudge into the area over the weekend
marking a return to more seasonal conditions. Breezy northeast winds
are expected across the region Saturday with another day of strong
winds in the Colorado River Valley. Lighter winds return area wide
on Sunday.

.DISCUSSION...Northerly winds will continue across the region
tonight and Saturday with the strongest winds continuing in the
Colorado River Valley. High resolution models and MOS guidance
forecasts strong winds again Saturday along the river valley so
decided to extend the Wind Advisory there through 10 PM Saturday
evening. Elsewhere, the beginning of the weekend will bring a breezy
day with near to slightly below normal temperatures. The surface
pressure gradient relaxes and high pressure noses into the area
Sunday for lighter winds across most of the region with seasonal
temperatures. Gusty winds will linger in the Colorado River Valley
Sunday morning then decreasing in the afternoon. Northwest flow
aloft sets up over the region Monday for generally light wind
conditions and another day of seasonal temperatures.

Models continue to make adjustments to the weather pattern for
Tuesday and beyond but appear to have come into better agreement
with the morning runs. The ECMWF, GFS and CMC are now taking the
brunt of the system energy through the northern Great Basin into the
central Rockies Tuesday into Wednesday. This would mean less wind
and less cooling for next week. Made some adjustments to the
temperature forecast for the Tuesday through Friday time frame to
account for the shallower solutions. After Wednesday, longwave
ridging moves into the western CONUS for quieter conditions area
wide. This pattern would support gusty but not significant winds
along the Colorado River Valley.

.AVIATION...For McCarran...Gusty northerly winds 15 to 25 kts
expected to continue through the remainder of the afternoon then
decreasing but remaining steady at 10-15 kts overnight. Gusty
northeast wind conditions are expected Saturday before returning to
diurnal lighter winds under 10 kts Saturday night and Sunday. Expect
some turbulence at both low and high altitudes as the low pressure
system continues sliding south.

For the rest of southern Nevada...northwest Arizona...and southeast
California...Gusty north winds to continue through mid evening
before decreasing overnight. Gusty northeast winds are expected on
Saturday. Stronger winds with gusts of 40 kts or more are expected
along the Colorado River Valley from IFP to EED through early
evening and again Saturday with some decrease in wind speeds
overnight. Mainly clear conditions area wide expect for lingering
clouds this afternoon in Mohave County.

.SPOTTER INFORMATION STATEMENT...Gusty north winds will continue
across the region through Saturday with strong winds becoming more
localized Saturday. Spotters are encouraged to report any wind
observations or impacts...such as blowing dust/visibility
restrictions...according to standard operating procedures.



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