361
FNUS75 KBYZ 282254
FWSBYZ

Spot Forecast for Ortiz...Stillwater County
National Weather Service Billings MT
454 PM MDT Tue Jul 28 2026

Forecast is based on forecast start time of 1700 MDT on July 28.
If conditions become unrepresentative...contact the National Weather
Service.

Please contact our office if you have questions or concerns with
this forecast.

.DISCUSSION...
Expect a few showers and weak thunderstorms to spread off the
mountains this evening, possibly beginning by 7pm. Main risk with
these storms is erratic wind gusts to 40 mph. Humidity recovery
tonight will be moderate, and RHs will drop to near 20 percent
tomorrow. There is a risk of thunderstorms again Wednesday
afternoon.

.REST OF TODAY...

Sky/weather.........Mostly sunny.
CWR.................0 percent.
Chance of lightning.5 percent.
Max temperature.....94-98.
Min humidity........18-22 percent.
Wind (20 ft)........
 Slope/valley.......Northeast to east 6-12 mph gusting to 18 mph.
 Ridgetop...........East 10-15 mph gusting to 20 mph.
Mixing height.......9500 ft AGL.
Transport winds.....West 12 mph.

.TONIGHT...

Sky/weather.........Partly cloudy. Isolated showers and
                    thunderstorms between 7pm and midnight. Erratic
                    wind gusts to 40 mph possible near storms.
CWR.................Less than 10 percent.
Chance of lightning.15 percent.
Min temperature.....62-66.
Max humidity........53-57 percent.
Wind (20 ft)........
 Slope/valley.......Northeast to east 6-12 mph shifting to the
                    southwest to west by midnight. Evening gusts to
                    18 mph.
 Ridgetop...........Northeast to east 10-15 mph gusting to 20 mph
                    shifting to southwest to west 5-10 mph by
                    midnight.
Mixing height.......Decreasing to 500 ft AGL overnight.
Transport winds.....Southwest 10 mph.

.WEDNESDAY...

Sky/weather.........Sunny then becoming partly sunny. Slight chance
                    of showers and thunderstorms after 1pm. Erratic
                    wind gusts possible near storms.
CWR.................Less than 10 percent.
Chance of lightning.20 percent.
Max temperature.....92-96.
Min humidity........21-25 percent.
Wind (20 ft)........
 Slope/valley.......Southwest 5-10 mph early, becoming northeast
                    by noon. Afternoon gusts to 15 mph. Variable
                    wind directions in the afternoon.
 Ridgetop...........West 5-10 mph becoming northeast 6-12 mph by
                    noon. Afternoon gusts to 20 mph.
Mixing height.......Increasing to 8000 ft AGL in the afternoon.
Transport winds.....Southwest 13 mph.

$$
Forecaster...Lester
Requested by...David Stamey
Type of request...WILDFIRE
.TAG 2618532.0/BYZ
.DELDT 07/28/26
.FormatterVersion 2.0.0
.EMAIL dstamey@stillwatercountymt.gov,mtbdc@firenet.gov