Mills, Wyoming 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

520
FXUS65 KRIW 041705
AFDRIW

Area Forecast Discussion
National Weather Service Riverton WY
1005 AM MST Wed Dec 4 2024

.KEY MESSAGES...

- Quiet and mild weather prevails with above normal temperatures through
  the remainder of the week.

- Precipitation chances may return for the weekend with the
  potential for some mountain snow and isolated snow showers
  across lower elevations.

&&

.DISCUSSION...
Issued at 1254 AM MST Wed Dec 4 2024

The calendar may say December but temperatures across portions of
the Cowboy State on Tuesday certainly did not feel like it. Some
locations of note were Lander and Cody where highs neared record
values. Lander reached 59 degrees coming within 2 degrees of tying
the record high of 61 set back in 1941 and Cody hit 63 degrees.
Temperatures across the CWA today are still expected to be 10 to 20
degrees above normal but likely not to the degree they were on
Tuesday. Highs are forecast to be in the mid 40s to low 50s east of
the Divide and in the upper 30s west of the Divide. Lingering
snowpack is leading to these cooler temperatures west of the Divide.
The cooler temperatures may lead to some patchy fog developing this
morning especially in portions of Star Valley, Jackson Hole, and
Sweetwater County. Overall, mild and quiet conditions prevail
through the remainder of the week.

Looking ahead towards the end of the week and weekend. A weak
shortwave nears the region for the end of the week but models
currently show the only impacts being some breezy winds. However,
this weak disturbance looks to be the prelude to a better chance for
widespread precipitation by the end of the weekend. The area of
potent ridging that is keeping dry and mild conditions in place
looks to gradually break down over the weekend. Long range models
have continued to show a disturbance moving into the region by the
end of the weekend. There is a lot of uncertainty regarding this
system with little agreement among any of the major models. While
there is not a general consensus among model, things are starting to
trend towards a weaker, less organized system. Models seem to be
trending towards a lower impact event with the best chance for snow
being across the higher elevations. However, there is still time for
things to shift one way or another but as of right now chances are
not looking favorable for a widespread impactful snow event.

&&

.AVIATION /18Z TAFS THROUGH 18Z THURSDAY/...
Issued at 1005 AM MST Wed Dec 4 2024

Prevailing VFR Conditions expected at all terminals through the
forecast period. KJAC has been holding on to some fog with cig at
FL003. Webcams and satellite shows this starting to scatter out from
the west and north since about 1630Z and will continue to do so.
Though there may be occasional SCT/BKN003 decks associated with this
fog, KJAC is expected to prevail at VFR after 18Z, and especially
after 1830Z. There is a 30% chance of fog returning to KJAC after 08Z
Thursday. If fog does redevelop, it is likely (80% chance) that it
will linger through at least 16Z to 17Z Thursday morning.

Winds will remain light through the period, with KCPR seeing a 14 to
16kt wind through the afternoon, diminishing by 2300Z. This breeze
will return to KCPR by 15 to 16Z Thursday. All other terminals will
see wind less than 8kts through the period.

Please see the Aviation Weather Center and/or CWSU ZDV and ZLC for
the latest information on smoke, icing, and turbulence
forecasts.

&&

.RIW WATCHES/WARNINGS/ADVISORIES...
None.

&&

$$

DISCUSSION...Dziewaltowski
AVIATION...Hensley