096
FXUS65 KRIW 040657
AFDRIW

Area Forecast Discussion
National Weather Service Riverton WY
1257 AM MDT Wed Jun 4 2025

.KEY MESSAGES...

- A bit warmer today, through still cooler than normal for early
June.

- Showers and thunderstorms possible today, mainly along and
  east of the Divide.

- Shower and thunderstorm chances Thursday and Friday.

- Warming trend for the rest of the week, with 80s returning by Saturday.
  Hot Monday and Tuesday.

&&

.DISCUSSION...
Issued at 1254 AM MDT Wed Jun 4 2025

Multiple shortwaves moving over Wyoming is the weather story for the
next couple days. Showers continue to track eastwards across the
Bighorn Basin and into Johnson County early this morning. This
continues through the morning hours, with most of this activity done
by early afternoon. Rain chances then turn to afternoon convection
as a shortwave passes through. Not much change from the previous
forecast with respect to where showers and storms are most likely.
High-resolution models continue to keep a majority of showers/storms
over the mountains, namely the Absaroka, Wind River, and Bighorn
Ranges. Some of this convection could move off the higher terrain,
into the nearby foothills and lower elevations. Mid-to-late
afternoon, there could also be some showers and storms over
Sweetwater County as well, as another shortwave moves in. After
midnight, precipitation chances (30% to 70%) will be along and
east of the Continental Divide, which then continues through
Thursday morning.

Shower and thunderstorm chances continue for Thursday, mainly along
and east of the Divide, though there will be some west of the Divide
too. Gusty winds over 30 mph would be the main hazard with Thursday
storms. Similar story for Friday as the northwest flow aloft
continues to push shortwaves through. Temperatures also warm through
the end of the workweek.

The eastern extent of a high pressure system pushes into the area
for Saturday. This should limit precipitation chances, but there
still may be a few over the mountains. However, overall it will be
warm and dry, with highs in the upper 70s to upper 80s. Even warmer
for Sunday as high pressure shifts east. Current long range models
would suggest Monday or Tuesday being the warmest with this high
pressure, before the axis moves to our east.

&&

.AVIATION /06Z TAFS THROUGH 06Z THURSDAY/...
Issued at 940 PM MDT Tue Jun 3 2025

Prevailing VFR conditions will persist through most of the TAF
period. An area of light rain is likely (70%) to move through the
Bighorn Basin early Wednesday morning, but conditions should only
drop to low VFR at KWRL and to a lesser extent KCOD. There is a low
chance (30%) of light rain at KJAC for a few hours to begin the TAF
period. Very isolated rain showers and thunderstorms will develop
Wednesday afternoon, with chances quite low across the area only
about 5-15%. The better chances (30-50%) will be in the mountains.
A weak weather system will bring scattered rain showers through
the area Wednesday evening into Wednesday night.

In general wind will remain below 10 knots for the next 24 hours.
The two terminals that will have wind stronger than 10 knots
Wednesday afternoon into Wednesday night are KCPR and KRKS. Gusts
around 20 knots will be possible at those terminals, especially
Wednesday evening. Occasional mountain obscuration will occur
at times, coinciding with the passing of rain showers.

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

&&

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

&&

$$

DISCUSSION...Wittmann
AVIATION...Rowe