FXUS65 KRIW 051132

AFDRIW



Area Forecast Discussion

National Weather Service Riverton WY

432 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 /12Z TAFS THROUGH 12Z FRIDAY/...

Issued at 425 AM MST Thu Nov 5 2026



Low ceilings are expected in the vicinity of KJAC through the 

morning, with the potential for MVFR ceilings at the terminal 

between 12Z and 15Z, at the latest. At KRKS, there is a very low

chance (less than 15 percent) for low, MVFR clouds at the 

terminal between 12Z and 14Z. VFR flight conditions are then 

forecast at all terminals the remainder of the TAF period.



A weak front approaches western Wyoming Thursday afternoon, bringing 

increased VFR cloud cover across the state and occasional 

mountain obscurations. Confidence is very low (less than 10 

percent) in any precipitation at or around KJAC, with virga or 

light precipitation likely remaining over the mountains. A few 

light showers cannot be ruled out after 08Z Friday at KRKS; 

however, confidence is too low to include in TAF at this time. 

All other terminals are forecast to remain dry. Relatively light

winds and a few wind shifts with the frontal passage are 

expected at most terminals. The exception to the light winds is 

KCPR, where breezy winds are forecast between 16Z and 22Z.



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...LaVoie

AVIATION...Gerhardt