Area Forecast Discussion
Issued by NWS Las Vegas, NV

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000
FXUS65 KVEF 192232
AFDVEF

Area Forecast Discussion
National Weather Service Las Vegas NV
232 PM PST Sun Nov 19 2017

.SYNOPSIS...A seasonal day expected Monday before temperatures
increase to near-record and/or record breaking levels by mid week
and Thanksgiving. Abundant high clouds over the area tonight and
Monday will provide filtered sunshine then skies will become mostly
clear with dry and calm conditions through Thanksgiving day.
&&

.SHORT TERM...Today through Tuesday night

After a chilly beginning to the day, temperatures have climbed
nicely and are approaching seasonal normals this afternoon. High
clouds are spreading eastward under a westerly flow aloft with the
thicker cloud cover staying north of the forecast area. Remnant
north winds linger locally in the Colorado River Valley but overall
coverage is on the decrease and light winds are expected area wide
by Monday.

The westerly flow is expected to bring thicker mid/high clouds to
the northern forecast zones tonight with thinner cloud cover and
filtered sunshine over the deserts. Ridging begins amplifying over
the west late Monday as a shortwave moving through the Pacific NW
moves east. Ridging will hold tough all the way through Thanksgiving
day before the next shortwave will be able to flatten it somewhat on
Friday. High pressure is forecast to expand and ridging amplifies
once again over the weekend but with the ridge axis more over the
intermountain region. This synoptic configuration would open up a
southwest flow aloft across our forecast area and bring an increase
in the potential for more extensive cloud cover over the region
next weekend.

The big weather story for our area this week is the influence of
high pressure on temperatures and record "heat" expected across the
region by mid week. For Thanksgiving Day, we are talking about a
high probability of breaking high temperature records in many
locations including Las Vegas.
&&

.CLIMATE...Temperatures during the latter half of this week will
jump to record territory. Below is a table of some of the threatened
high temperature records.

               TUE 11/21  WED 11/22  THU 11/23  FRI 11/24  SAT 11/25
Las Vegas, NV  77 (1976)  77 (1976)  76 (1995)  81 (1949)  76 (1970)
Bishop, CA     78 (1950)  76 (1954)  78 (1959)  80 (1949)  78 (1954)
Barstow, CA    84 (1950)  80 (1981)  82 (1949)  85 (1949)  81 (1959)
Needles, CA    84 (1926)  83 (1950)  82 (1995)  84 (1949)  83 (1949)
Kingman, AZ    78 (2006)  77 (2002)  82 (1915)  84 (1921)  83 (1921)
&&

.AVIATION...For McCarran...Light winds following diurnal
patterns are expected over the next few days. Tonight, winds will
stay below 7 knots, with a westerly component, Monday afternoon
afternoon a northeast-east component. Broken-Overcast skies at or
above 25 kft through the period.

For the rest of southern Nevada, northwest Arizona and southeast
California...North breezes down the Colorado River Valley at KIFP
and KEED will gradually decrease tonight becoming light and variable
Monday. Outside of the Colorado River Valley winds will follow
typical diurnal patterns. Broken-Overcast skies at or above 20 kft
through the period.
&&

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

$$

Discussion...Salmen
Aviation...Pierce

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