Area Forecast Discussion
Issued by NWS Cheyenne, WY

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FXUS65 KCYS 162145
AFDCYS

Area Forecast Discussion
National Weather Service Cheyenne WY
245 PM MST Thu Nov 16 2017

.SHORT TERM...(This evening through Friday night)
Issued at 245 PM MST Thu Nov 16 2017

Concerns will focus on heavy snowfall expected over the higher
mtns later this evening through Friday. Currently just some gusty
winds noted around the mtns. Marginal speeds for high winds now as
the gradient is easing but will keep high wind warning going as
they area still close in a few spots.

Expect snow to increase over the higher mtns later this evening as
moisture increases ahead of an upper trough currently nearing the
Pacific nw. Breezy winds should keep temps above freezing over
lower elevations out west overnight so pcpn should stay mostly as
rain there. The rain should transition to snow Friday morning
there as a cold front passes across with heavier snows continuing
over the Sierra Madre/Snowy Ranges. Should see around 15 inches
over that area by Friday evening. Cold front will move across the
eastern plains Friday afternoon with temps likely falling during
the afternoon. Still looking like a good Bora wind event over
mainly Laramie county late in the day so will keep current high
wind watch in place there. More isolated rain and snow showers
expected east of the mtns Friday afternoon and evening as the main
upper trough passes across. Pcpn will end Friday night as the
upper trough moves east with winds diminishing as well.

.LONG TERM...(Saturday through Thursday)
Issued at 245 PM MST Thu Nov 16 2017

Cool and a bit breezy Saturday in the wake of the upper system but
otherwise dry. Milder Sunday and Monday but looking rather windy
Monday especially in the wind-prone areas. Another fast-moving
upper shortwave passes by Monday night into Tuesday bringing some
snow showers mainly to the higher mtns again. Dry and mild again
for Wednesday and Thanksgiving day.

&&

.AVIATION...(For the 18Z TAFS through 18Z Friday morning)
Issued at 1015 AM MST Thu Nov 16 2017

VFR for all terminals through the period except at KRWL where some
MVFR/IFR cigs expected mainly after 06z with showers in that area.
Gusty winds affecting mainly KRWL and KLAR this afternoon with some
gusts over 40kts.

&&

.FIRE WEATHER...
Issued at 245 PM MST Thu Nov 16 2017

Fire weather concern will be low through the weekend as cooler
temperatures and some rain and snow showers moves across the
area. Heavy snow over the higher mtns tonight and Friday. Cold
front will sweep across the area Friday afternoon with a period of
gusty winds behind it.

&&

.CYS WATCHES/WARNINGS/ADVISORIES...
WY...Winter Storm Warning from 11 PM this evening to 5 PM MST Friday
     for WYZ112-114.

     High Wind Warning until 6 PM MST this evening for WYZ101-104-110.

     High Wind Watch from Friday afternoon through Friday evening for
     WYZ116>119.

NE...None.
&&

$$

SHORT TERM...RE
LONG TERM...RE
AVIATION...RE
FIRE WEATHER...RE



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