FNUS75 KBYZ 042058

FWSBYZ



Spot Forecast for Griffin...DOI

National Weather Service Billings MT

258 PM MDT Tue Aug 4 2026



Forecast is based on forecast start time of 1600 MDT on August 04. 

If conditions become unrepresentative...contact the National Weather

Service.



Please contact our office if you have questions

or concerns with this forecast.



.DISCUSSION...



There is a narrow window between 8 PM MDT to 1 AM MDT where a 

stray shower or storm could roll off the Bighorn Mountains towards

the incident site, however the chance of this is quite low (15%).

Winds tonight will be light variable, even at ridgetop, primarily

driven by terrain. Wednesday winds will be out of the northwest 

reaching 15 mph at ridgetop. High temp wil be in the upper 80s 

with Min RH values in the low teens. Conditions will continue to 

slowly get hotter and drier through Friday with a possible cold 

front passage late Thursday into Friday AM. WMR



.REST OF TODAY...



Sky/weather.........Mostly sunny with haze. 

CWR.................0 percent. 

Chance of lightning.0 percent. 

Max temperature.....74-78. 

Min humidity........16-20 percent. 

Wind (20 ft)........ 

 Slope/valley.......Northeast winds 5 to 10 mph. 

 Ridgetop...........North around 15 mph. 

Mixing height.......7900 ft AGL. 

Transport winds.....Northeast around 15 mph. 



.TONIGHT...



Sky/weather.........Partly cloudy with haze. Slight chance of a shower 

                    or thunderstorm in the evening. Erratic wind gusts

					expected near thunderstorms.

CWR.................5 percent. 

Chance of lightning.5 percent. 

Min temperature.....47-51. 

Max humidity........59-63 percent. 

Wind (20 ft)........ 

 Slope/valley.......Northeast winds 5 mph becoming light and terrain driven 

                    after sunset.

 Ridgetop...........South-southwest around 10 mph. 

Mixing height.......Decreasing to 500 ft AGL overnight. 

Transport winds.....South around 10 mph. 



.WEDNESDAY...



Sky/weather.........Mostly sunny with haze. 

CWR.................0 percent. 

Chance of lightning.0 percent. 

Max temperature.....85-89. 

Min humidity........10-14 percent. 

Wind (20 ft)........ 

 Slope/valley.......Light winds becoming northwest 5 to 10 mph in 

                    the afternoon. 

 Ridgetop...........Northwest around 15 mph. 

Mixing height.......Increasing to 10900 ft AGL in the afternoon.

Transport winds.....Northwest around 15 mph. 



$$

Forecaster...Matos/Mckeown-Robbie

Requested by...Jonathan Mantello

Type of request...WILDFIRE

.TAG 2618924.1/BYZ

.DELDT 08/04/26

.FormatterVersion 2.0.0

.EMAIL mtmcc@firenet.gov