Area Forecast Discussion
Issued by NWS Cheyenne, WY

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43
FXUS65 KCYS 102059

Area Forecast Discussion
National Weather Service Cheyenne WY
159 PM MST Sat Mar 10 2018

.SHORT TERM...(This evening through Monday Night)
Issued at 158 PM MST Sat Mar 10 2018

Tonight...Expect decreasing cloudiness and lessening winds this
evening as the shortwave trough aloft moves further away to our
southeast and the low and mid level gradients relax. Colder night
with clearing skies and the cold airmass in place.

Sunday...Dry weather with a ridge aloft over our counties. Continued
relatively cool with surface high pressure across the western
Dakotas, keeping cool easterly winds over our counties.

Sunday night...A weak shortwave trough aloft moves into western
Wyoming but with minimal effects for us due to lack of clouds and

Monday...Continued warming trend in the wake of the shortwave trough
aloft, though with a strong surface high continuing over North
Dakota, cool east and southeast flow over our counties keeping it
relatively cool.

.LONG TERM...(Tuesday through Saturday)
Issued at 158 PM MST Sat Mar 10 2018

Tuesday...Slow warming trend continues under a ridge aloft over
western Wyoming, though warming trend limited by cool surface high
pressure over the central United States.

Wednesday...Significant warming takes place as the upper ridge axis
moves off to our east and southwest flow aloft over our counties
helps to establish a surface lee trough, boosting maximum
temperatures into the 60s to near 70 degrees.

Thursday...Continued mild with southwest flow aloft. Will see
increasing middle and high cloud cover, though rain chances look
minimal with lack of low level moisture.

Friday...Expect scattered showers to develop as moisture depth
increases and the atmosphere becomes more unstable. Low level
upslope northeast winds will help generate lift. Somewhat cooler
though still relatively mild.

Saturday...Even cooler based on thickness changes. Looks like enough
low and mid level moisture under southwest flow aloft to produce
scattered showers.


.AVIATION...(For the 18Z TAFS through 18Z Sunday afternoon)
Issued at 158 PM MST Sat Mar 10 2018

Main concern will be the potential for brief snow showers, mainly
at KCDR this afternoon. Otherwise, expect VFR conditions to
prevail with just some northwest winds gusting to between 25 and
35 knots this afternoon. These will subside by this evening.


Issued at 128 PM MST Sat Mar 10 2018

Will need to watch afternoon humidities this week with minimum
humidities in the teens at some locations. Fortunately, winds will
be relatively light in the afternoons.





FIRE WEATHER...RUBIN is the U.S. government's official web portal to all federal, state and local government web resources and services.