Area Forecast Discussion
Issued by NWS Cheyenne, WY

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FXUS65 KCYS 230424

Area Forecast Discussion
National Weather Service Cheyenne WY
1024 PM MDT Thu Mar 22 2018

Issued at 1021 PM MDT Thu Mar 22 2018

Just got a report of 61 MPH at Halleck Ridge on I-80 this evening.
Moved up the start time for the High Wind Warning to now for the
Arlington Zone. Updates sent.

UPDATE Issued at 351 PM MDT Thu Mar 22 2018

After looking at the forecast soundings for the Arlington area
tonight, we have 60kts right off the surface out there tonight
into Friday morning. 850/700mb Craig to Casper gradients right
around 60mtrs after 06Z tonight through 18Z Friday. Decided to
issue a warning for the Arlington area. Updates sent.


.SHORT TERM...(This evening through Friday night)
Issued at 250 PM MDT Thu Mar 22 2018

Clouds gradually spreading east across the CWA this afternoon as
an upper ridge axis is also moving east over the plains. Expect
showers to increase over northern and western parts of the CWA
tonight as an upper shortwave lifts northeast towards the area.
Some snow will fall over the mtns but amounts not looking as great
as earlier with the best accumulations, about 3-6 inches, over
the higher peaks. Other concern later tonight is for some increase
in winds as the gradient sharpens for a time. Could get a few
gusts close to high wind speeds in the Arlington area but event
should be rather short-lived and marginal. On Friday the shortwave
will move over the high plains and with some afternoon instability
a few thunderstorms should occur especially over the Panhandle.
Clearing out Friday night with upper ridging rebuilding over the

.LONG TERM...(Saturday through Thursday)
Issued at 250 PM MDT Thu Mar 22 2018

Dry and mild across the CWA Saturday with southwesterly flow
aloft ahead of a digging upper trough over the Pacific northwest.
A weak impulse ejecting across the area ahead of the trough could
bring a few showers to western parts of the CWA Saturday night.
Sunday through Tuesday looking unsettled as the upper trough moves
slowly east. models still unsure as to the evolution of this
system but still favoring a cut-off low developing over the far
southwest Tuesday. Overall the models have backed off on QPF over
the CWA this period and the threat of heavy snow not as high now,
but still need to keep close watch on it. Cool and rather wet
Monday into Tuesday then milder Weds and Thursday.


.AVIATION...(For the 06Z TAFS through 06Z Friday night)
Issued at 1002 PM MDT Thu Mar 22 2018

Winds will be on the increase tonight for KRWL and KLAR, spreading
east to cover the Nebraska Panhandle airports during the day
Friday. Still expecting VFR conditions through the next 24 hours.
Could see some showers develop Friday afternoon. Did not include
in this TAF package, but later shifts will likely be adding on
later issuances.


Issued at 250 PM MDT Thu Mar 22 2018

No significant concerns seen through the weekend with weather
conditions generally non-critical. Unsettled conditions expected
as a couple disturbances bring scattered showers at times. A few
thunderstorms possible Friday afternoon.


WY...High Wind Warning until noon MDT Friday for WYZ110.



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