Fort Steele, Wyoming Weather Forecast Discussion

515
FXUS65 KCYS 011738
AFDCYS
Area Forecast Discussion
National Weather Service Cheyenne WY
1138 AM MDT Wed Oct 1 2025
.KEY MESSAGES...
- Mild to warm temperatures will continue through Friday, before
  a potent weather disturbance aloft and its associated cold
  front bring cooler and wetter weather for Saturday through
  Monday.
&&
.SHORT TERM /THROUGH FRIDAY/...
Issued at 234 AM MDT Wed Oct 1 2025
Today...Drier zonal flow aloft develops, producing a dry day, with
temperatures about the same as yesterday, with 700 mb temperatures
near 8 Celsius.
Thursday...A warming trend develops again as the flow aloft turns
southwest, with 700 mb temperatures near 10 Celsius yielding maximum
temperatures in the lower to mid 70s west of I-25, with upper 70s
and 80s east of I-25.
Friday...Southwest flow aloft strengthens in advance of the potent
shortwave trough aloft over eastern Utah. With a slight increase in
700 mb temperatures, highs will be slightly warmer. Looks like
adequate low and mid level moisture to spark isolated to widely
scattered afternoon and evening showers.
&&
.LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/...
Issued at 234 AM MDT Wed Oct 1 2025
Saturday...The progressive shortwave trough aloft moves to eastern
Wyoming in the afternoon, producing scattered to numerous showers
and scattered thunderstorms, in addition to cooler temperatures in
the wake of a cold frontal passage. Low and mid level gradients
suggest a windy day for much of the forecast area.
Sunday...Strong southwest flow aloft prevails over cool surface high
pressure producing low level upslope and extensive cloud cover. 700
mb temperatures near 0 Celsius will yield cool daytime high
temperatures from the mid 50s to lower 60s. The lift produced by low
level upslope and a weather disturbance aloft will help generate
scattered showers and isolated thunderstorms in the afternoon and
evening.
Monday...Cool surface high pressure across the western high plains
will help keep cool low level upslope in place with maximum
temperatures only in the mid 50s to lower 60s. Adequate low and mid
level moisture will help produce isolated to widely scattered
afternoon and evening showers.
Tuesday...Weak ridging aloft develops. Expect a slow warming trend
as the airmass moderates somewhat, though surface high pressure over
the Northern High Plains states will keep cool air over our
counties. With the lack of a lifting mechanism, showers will be more
isolated compared to Monday.
&&
.AVIATION /18Z TAFS THROUGH 18Z THURSDAY/...
Issued at 1138 AM MDT Wed Oct 1 2025
VFR conditions are expected through the TAF period with some high
clouds floating across the area. Breezy conditions are expected
throughout the day at all terminals with gusts between 20 and 30
kts. Winds will ease this evening after sunset.
&&
.CYS WATCHES/WARNINGS/ADVISORIES...
WY...None.
NE...None.
&&
$$
SHORT TERM...RUBIN
LONG TERM...RUBIN
AVIATION...SF

NWS CYS Office Area Forecast Discussion