Riverton, Wyoming 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

808
FXUS65 KRIW 051101
AFDRIW

Area Forecast Discussion
National Weather Service Riverton WY
501 AM MDT Sun Apr 5 2026

.KEY MESSAGES...

- Tranquil weather conditions for Easter Sunday with warming
  temperatures and light winds.

- A weather system will bring precipitation to mainly the
  western mountains, with near critical fire weather possible
  east of the Divide.

- A series of weather systems will bring additional
  precipitation chances Wednesday through Friday with details
  not for certain at this time.

&&

.DISCUSSION...
Issued at 130 AM MDT Sun Apr 5 2026

Weak northwest flow continues across the CWA with the main axis
of the upper level ridge to the west keeping the main finger of
the PFJ well north and northeast into Canada and the Dakotas.
This is evident on satellite with clear skies to continue
through the short term forecast. Warming trend expected Sunday
through the middle of the next work week as temperatures push
10 to 20 degrees above average for this time of year in early
April. The aforementioned ridge does start to break down and
flatten as the jet pushes southward across the northern parts of
the state by midday Tuesday. This will bring the first of a
series of subtle and weak shortwaves for the rest of the week as
the gradient near the surface tightens Tuesday and Wednesday
afternoons. As a result, elevated to near critical fire weather
concerns likely east of the Divide due to gusty winds and low
humidity values. A bit cooler and not as dry the remainder of
the week.

Precipitation wise, the forecast still has quite a bit of
uncertainty but increased chances for the western mountains
Tuesday and shifted to the northern mountains and Bighorns
Wednesday. The northwest flow that the EC portrays keeps the
uncertainty further south and for the lower valleys/basins at
this time but the PFJ looks to retreat northeastward by Thursday
night. This will build in another upper level ridge for Friday
and into next weekend. An upper level low looks to cutoff during
this time over the Sierra Nevadas that will be interesting to
keep an eye on but as of now, the current track keeps it south
and bring some much needed moisture for the desert SW and into
NM/CO as well. Stay tuned for updated forecasts in the coming
days but enjoy Easter Sunday and to start the new work week.

&&

.AVIATION /12Z TAFS THROUGH 12Z MONDAY/...
Issued at 500 AM MDT Sun Apr 5 2026

VFR conditions through the period as high pressure influences the
area. Winds are light and diurnally driven, with speeds generally 10
knots or less. High clouds increase towards the end of the period.

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...Lowe
AVIATION...Wittmann