FXUS65 KRIW 050906

AFDRIW



Area Forecast Discussion

National Weather Service Riverton WY

206 AM MST Thu Nov 5 2026



.KEY MESSAGES...



- Dry conditions and seasonal temperatures will stay in place

  for most areas today and Friday. Temperatures will be 5 to 10

  degrees warmer in the Bighorn Basin and across Johnson/Natrona

  counties this afternoon. 



- There is a 10 to 20% for light showers over portions of

  Sweetwater County starting early Friday morning and ending by

  early afternoon. 



- Overall dry conditions and light winds continue through the 

  rest of the week. Above average temperatures expected starting

  Saturday and continue into the middle of next week.



&&



.DISCUSSION...

Issued at 153 AM MST Thu Nov 5 2026



Another day of quiet weather returns to the Cowboy State today, as 

an area of high pressure shifts over eastern MT/WY and the western 

Dakotas. The main impacts will be temperatures rising a few degrees 

above normal in the Bighorn Basin and Natrona County and as high as 

13 degrees above normal over Johnson County today. Additionally, 

southwest winds with gusts up to 20 mph will occur from South Pass 

to eastern Johnson County this afternoon. 



A trough will move over the region on Friday, shifting the area of 

high pressure over the Dakotas and Upper Midwest. Very light rain 

showers will be possible over Sweetwater County between 11Z and 20Z 

along the tail end of the trough. West to southwest winds with gusts 

of 20 to 25 mph will impact most areas Friday afternoon in the wake 

of the trough. Otherwise, temperatures will return to more seasonal 

levels. A broad ridge will then build over much of the Intermountain 

West and extend over the Northern Rockies by Saturday keeping 

conditions dry. Above normal temperatures return to the Bighorn 

Basin and Johnson/Natrona counties Saturday, becoming more 

widespread across the CWA on Sunday. A fast moving trough will pass 

over the northern half of the state Monday as the ridge folds over. 

The flow pattern will be more zonal Monday and Tuesday, before 

another ridge returns over the Northern Rockies Wednesday and 

remains in place Thursday. Conditions look to remain dry through the 

next 7 days, apart from the aforementioned light showers possible 

Friday morning.



&&



.AVIATION /06Z TAFS THROUGH 06Z FRIDAY/...

Issued at 930 PM MST Wed Nov 4 2026



VFR conditions expected for the entirety of the period at all

TAF sites. Light winds less 10kts throughout outside of a gust

up to 18kts at KCPR during peak heating of the afternoon

Thursday. Otherwise, mid level ceilings after 18-20Z west of the

Divide with showers in the vicinity of KJAC through 00Z, but

mainly nearing the higher terrain. This will cause some lower 

VFR ceilings and mountain obscuration along the Tetons to Gros 

Ventres, as well as near the northern Winds for KBPI/KPNA. Dry 

conditions elsewhere with no other weather elements expected at 

this time. 



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...LaVoie

AVIATION...Lowe