603
FXUS65 KRIW 062027
AFDRIW

Area Forecast Discussion
National Weather Service Riverton WY
227 PM MDT Thu Jun 6 2024

.KEY MESSAGES...

- Above normal temperatures continue through the upcoming
  weekend.

- A weak cold front to the northeast will bring some showers
  mainly for higher elevations late Friday and Saturday.

- Another wave to the northwest will bring a chance for showers
  to the western mountains on Sunday.

&&

.DISCUSSION...
Issued at 203 PM MDT Thu Jun 6 2024

Warm temperatures have continued today under strong early
summer ridging. Expect this ridge to keep warm temperatures in
place through the upcoming weekend into early next week. While
the ridge may be holding place, there will be a few weak systems
trying to push around the ridge through the weekend. The first
one is moving into SW ID currently, and may spread a few showers
into the western mountains tonight. Lack of instability will
keep these showers light, with minimal accumulation. The second
system sweep by to the north east later Friday and Saturday.
While this second system sweeps a weak cold front through
northeast WY, impacts for our CWA will be minimal, with a slight
downtick in temps for Johnson and Natrona County Friday. There
may be enough cooling aloft to bring a little more instability
for more shower activity, especially over higher mountain peaks
of the Bighorns, and greater Natrona County. Another system will
sweep across the northern Rockies Sunday. Latest model runs
have brought this system a little closer to northwest WY for
Sunday, bring a little more moisture along from the Pacific, and
occurs during peak heating. This is bringing a better chance
for rainfall for all of NW WY, but chances remain low for any
accumulation of 0.25".


&&

.AVIATION /18Z TAFS THROUGH 18Z FRIDAY/...
Issued at 1126 AM MDT Thu Jun 6 2024

VFR conditions expected at all TAF sites through the period. Light
winds and clear skies mainly to start the period. Winds pick up some
at BPI, RKS, and PNA after 20Z with an approaching weak system to
the northwest. Winds will diminish with radiational cooling after
around 02Z with increasing upper level clouds through the afternoon
and evening. Light winds less than 10kts for sites east of the
Divide. Dry conditions expected with no other weather elements
forecasted. The exception may be some showers approaching KJAC after
07Z but not enough confidence to include in the forecast at this
time. Increasing winds on Friday toward the end of the period, still
20 kt or less.

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...Myers
AVIATION...Hattings/Swanson