648
FXUS65 KCYS 021121
AFDCYS

Area Forecast Discussion
National Weather Service Cheyenne WY
521 AM MDT Fri Oct 2 2026

.KEY MESSAGES...

- Dry conditions and above average temperatures will continue
  into the beginning of next week.

&&

.SHORT TERM /THROUGH SATURDAY NIGHT/...
Issued at 147 AM MDT Fri Oct 2 2026

Nothing notable in the short term as benign weather continues into
the start of the weekend. High pressure locked in over the Four
Corners region will ensure mostly sunny skies with no chance of
precipitation for Friday and Saturday. Before the ridge of high
pressure over the Four Corners region strengthens, zonal flow will
dominate for Friday. Zonal flow will usher in warmer and drier air
aloft, leading to above average temperatures over the next few days.
Zonal flow will lead to breezy conditions during the day, with these
breezy conditions aiding in warming temperatures through downsloping
winds. High temperatures will reach the 70s and 80s which is
about 10 degrees above average for the beginning of October.
Breezy conditions will continue into Friday night, allowing
overnight lows to stay on the milder side.

Another breezy day is expected on Saturday, mainly from a shortwave
passing to the northeast of the CWA. This shortwave will push cooler
air from the north down into the northern zones of the forecast
area. Locations from Douglas to Chadron can expect high temperatures
to be about 5 degrees cooler than Friday, but still above average
for early October. Highs for the rest of the CWA will still be in
the 70s to 80s. Winds will ease Saturday night, allowing radiational
cooling to take place with mostly clear skies. Overnight lows will
fall into the 40s, with 30s possible in high valley locations.

&&

.LONG TERM /SUNDAY THROUGH THURSDAY/...
Issued at 204 PM MDT Thu Oct 1 2026

Mostly benign and warm conditions expected as we move into the
long term starting with Sunday, which will actually be our
coolest day of the period. We`ll see widespread temperatures in
the 70`s with a few sites possibly peaking around 80, but Monday
into Tuesday more widespread upper 70`s to 80`s will be present
under high pressure ridging. This feature may briefly recede
and flatten thanks to troughing to the north and allow for a bit
more widespread 70`s to return by the end of the forecast
period, but this will likely be brief as extended models show
the ridge building back in beyond the long term. Otherwise with
no major features expected to add variability to the forecast,
pressure gradients will remain on the weak side with a chance
at daily breezy, diurnally driven winds, but nowhere near strong
for this region. Elevated to near critical fire weather
conditions could be present thanks to the expected dryness and
the afternoon breezy winds, and will need to be monitored
particularly on Monday when RH`s look to be at their lowest.
Overall there is high confidence in the forecast, with ensembles
showing near unanimous agreement on the above forecast, as a
warm start to fall and October continues.

&&

.AVIATION /12Z TAFS THROUGH 12Z SATURDAY/...
Issued at 521 AM MDT Fri Oct 2 2026

Current satellite does show an area of low clouds developing just
east of KCYS. It is possible that these low clouds and potentially
fog could impact the terminal within the next few hours. Low CIGs
and reduced visibility could briefly bring conditions down to MVFR
or IFR, however chances of this are low. A breezy day is expected at
all terminals, but especially in the Nebraska panhandle where gusts
up to 30 kts will be possible this afternoon and into the evening
hours. Mostly sunny skies are expected during the day.

&&

.CYS WATCHES/WARNINGS/ADVISORIES...
WY...None.
NE...None.

&&

$$

SHORT TERM...SF
LONG TERM...CG
AVIATION...SF