Area Forecast Discussion
Issued by NWS Cheyenne, WY

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FXUS65 KCYS 202034
AFDCYS

Area Forecast Discussion
National Weather Service Cheyenne WY
134 PM MST Tue Feb 20 2018

.SHORT TERM...(This evening through Wednesday night)
Issued at 230 PM MST Tue Feb 20 2018

Weak impulse will move east across the region this evening with
effect limited to some cloudiness as well as a few snow showers
over the higher mtns. Elsewhere mainly clear skies and light winds
along with now cover will allow for another very cold night with
mins below zero again. Wind chills look like they will get to or
below -20F over the northern CWA and the Laramie valley so have
posted a wind chill advy for those areas later tonight into Weds
morning. Quiet day again Weds and warmer but still on the cold
side. Will continue to undercut guidance temps given snow cover.
Not as cold Weds night as the cold arctic high over the plains
slips slowly east.

.LONG TERM...(Thursday through Tuesday)
Issued at 230 PM MST Tue Feb 20 2018

Looks like it will be cool and rather unsettled over the CWA
through the weekend as a couple system affect the region. A large
upper trough over the western CONUS Thursday will deepen some
through early Friday as additional energy digs in off the
northeastern Pacific. Disturbances ejecting northeast from this
system will bring widely sctd snow showers to the CWA both
Thursday and Friday. The main trough then moves by Friday night
with dry and cool weather for Saturday. The next shortwave scoots
across sat night into Sunday bringing some more snow showers,
primarily to the mtns. Dry and milder conditions return early
next week as the upper flow turns southwesterly ahead of the next
upper trough.

&&

.AVIATION...(For the 18Z TAFS through 18Z Wednesday afternoon)
Issued at 1222 PM MST Tue Feb 20 2018

VFR through tonight. Skies have cleared across most of the area,
though some thin cumulus clouds will linger or redevelop over
Wyoming this afternoon, mainly west of the Laramie Range. These
will be mostly scattered, but could produce some localized 3-5
thousand foot ceilings. These clouds should dissipate by 02z.

&&

.FIRE WEATHER...
Issued at 230 PM MST Tue Feb 20 2018

No Fire weather concerns for the rest of the week with cool
temperatures and snow cover keeping conditions non-critical.

&&

.CYS WATCHES/WARNINGS/ADVISORIES...

WY...Wind Chill Advisory from 11 PM this evening to 9 AM MST
     Wednesday for WYZ101-102-115.

NE...Wind Chill Advisory from 11 PM this evening to 9 AM MST
     Wednesday for NEZ002-095.

&&

$$

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



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