Riverton, Wyoming 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

196
FXUS65 KRIW 141807
AFDRIW

Area Forecast Discussion
National Weather Service Riverton WY
1207 PM MDT Sun Jun 14 2026

.KEY MESSAGES...

- Highs today generally in the upper-60s to mid-70s. West of the Divide,
  cloud cover decreases through the afternoon.

- Temperatures rebound to seasonal normals across the entire
  region Monday before warming several more degrees Tuesday.

- Limited to no rain chances, warm temperatures, low humidity,
  and increasing west wind leads to elevated to critical fire
  conditions much of the week. Tuesday and Wednesday look to be
  the most critical, with widespread winds gusting 30 to 45 mph.

&&

.UPDATE...
Issued at 1150 AM MDT Sun Jun 14 2026

The forecast remains on track. Clouds east of the Divide should
dissipate through the afternoon as the sun strengthens. A few light
showers are possible around the Absaroka and Bighorn Mountains
through this evening, but otherwise today is dry across western and
central Wyoming. Drier and windier conditions bring elevated to
critical fire weather concerns into next week.

&&

.DISCUSSION...
Issued at 223 AM MDT Sun Jun 14 2026

Areas east of the Divide were abnormally chilly yesterday for mid-
June. The overall forecast verified quite well, although
portions of Johnson and Natrona counties stayed in the 40s
through much of the day, finally reaching the upper 50s by 6PM.
The 0.49" of rain that was forecasted in northern Johnson
County between 12Z and 18Z also verified, with KBYG receiving
0.47". The cold front continues its eastward progression,
finally reaching the UT border around 06Z Sunday. Gusts of 25 to
40 mph will continue across portions of Sweetwater and southern
Sublette counties for the next few hours, subsiding through
15Z.

Seasonal to slightly below normal temperatures will be in place
across the CWA today with highs in the upper 60s into the 70s.
Conditions will be dry, except for very isolated showers possible
from the southern end of the Absarokas to the southern end of the
Bighorns throughout the day. Winds will be light as well, with gusts
up to 20 mph occurring over southern portions of the
forecast area.

A warming trend will begin Monday, with a northwest flow pattern
aloft in place. Conditions will be dry, with highs near 80 degrees
returning across the CWA. Any chance for a shower could occur over
the northern half of the Bighorns and northern Johnson County late
in the afternoon. Heights will rise Tuesday within this northwest
flow pattern, leading to high temperatures in the upper 80s to lower
90s in the Wind River and Bighorn Basins and portions of Natrona
County. Temperatures will be slightly cooler east of the Divide
Wednesday, as a cold front clips northern portions of the
state. This looks to be the best chances for any precipitation
next week as well, as much of the week looks to stay dry. Fire
weather conditions will be elevated to critical through the week
as well, with Tuesday looking to be the most critical. Fuels
are currently critical for portions of Natrona County and a Fire
Weather Watch looks likely here.

&&

.AVIATION /18Z TAFS THROUGH 18Z MONDAY/...
Issued at 1206 PM MDT Sun Jun 14 2026

VFR conditions are expected through the period as clouds scatter out
early this afternoon. KCPR will be the last terminal to hold onto
lower (VFR) cloud decks as light showers in the area dissipate. A
few mountain showers may linger across central and northern Wyoming
this afternoon, though no terminal impacts are expected. Wind will
remain lighter today, generally with a northerly component. Clouds
decrease further overnight, with mostly clear skies through Monday
morning.

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.

&&

$$

UPDATE...Wittmann
DISCUSSION...LaVoie
AVIATION...Myers