Area Forecast Discussion
Issued by NWS Cheyenne, WY

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FXUS65 KCYS 261733

Area Forecast Discussion
National Weather Service Cheyenne WY
1133 AM MDT Wed Oct 26 2016

.SHORT TERM...(Today through Friday)
Issued at 148 AM MDT Wed Oct 26 2016

Quiet weather will continue through Friday as the upper level
disturbance moves east into the eastern Great Plains. This feature
did not produce much over the forecast area yesterday with mainly
just mid level cloudiness and a few sprinkles. Models show another
high amplitude ridge developing over the central and southern
Rockys...with the ridge amplifying northward late this week. This
will result in unseasonably warm temperatures and dry conditions
through Friday with Pacific energy remaining well west of the
forecast area...and mainly impacting the Pacific coastline. Near
record highs are expected on Thursday as 700mb temps increasing
above 10c along the I-80 corridor...resulting in highs in the
70`s across southeast Wyoming and low to mid 80`s over western
Nebraska and adjacent valleys across southeast Wyoming. Lee-side
surface trough will develop each afternoon...which will keep winds
breezy to locally windy along and west of the I-25 corridor each
day. The wind prone corridors will be windy each night as well due
to a sharp pressure gradient perpendicular to the mountains...but
strong winds are not expected through at least Friday afternoon.

.LONG TERM...(Friday Night through Tuesday)
Issued at 148 AM MDT Wed Oct 26 2016

Friday night/Saturday...Weak shortwave moves across our counties
Friday night with only a few mountain showers noted due to limited
low and mid level moisture. Looks dry during the day Saturday as a
low amplitude ridge aloft builds overhead. Cooler than Friday based
on thickness changes.

Sunday...Warming trend as flow aloft becomes southwest and 700 mb
temperatures rise to near 8 Celsius. Looks rather windy based on 500
and 700 mb gradients. Aside from a few showers over our Sierra Madre
Range, it looks dry.

Monday...Fast moving and low amplitude shortwave and cold front
passage will produce a cooler day. With the fast speed of the
shortwave and limited low and mid level moisture, shower chances
look quite slim. Outdoor events in the evening will be minimally

Tuesday...Slightly cooler most areas due to cloud cover and some
mid level cooling. Continued dry with limited low and mid level


.AVIATION...(For the 18Z TAFS through 18Z Thursday afternoon)
Issued at 1131 AM MDT Wed Oct 26 2016

VFR conditions prevail. Gusty winds can be expected this afternoon
over the southeast Wyoming terminals, with gusts between 20 and 30
knots common.


Issued at 148 AM MDT Wed Oct 26 2016

No significant Fire Weather concerns for the rest of this week and
through next weekend. Elevated conditions are possible Thursday
afternoon just east of the Laramie Range mainly due to low
RH...but gusty winds will likely be considerably further west
where humidities will be higher. A few locations may hit criteria
across zones 309 and 310...but should not be significant enough to
warrant headlines. Cooler temperatures and higher humidities are
expected by the weekend and early next week as a Pacific cold
front moves towards the region.




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