Station Name: Sun River at Simms MT
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 3,550 feet

Nearest Address:
99 Simms Fairfield Rd
Simms, MT 59477
Cascade County

GPS Coordinates: 47.50162778, -111.9319139

Nearby Water Temperatures

Winter Weather Advisory issued December 26 at 5:56PM MST until December 27 at 2:00PM MST by NWS Great Falls MT

Effective: Fri December 26, 2025, 5:56 PM
Expires: Sat December 27, 2025, 6:15 AM

* WHAT...Snow. Additional snow accumulations between 2 and 6 inches with higher amounts above 6000 feet. Winds gusting as high as 45 mph. * WHERE...The Continental Divide along the Rocky Mountain Front. * WHEN...Until 2 PM MST Saturday. * IMPACTS...Travel could be difficult and tire chains may be required for some vehicles. Those in the backcountry should ensure they are prepared for dangerous conditions. * ADDITIONAL DETAILS...Periods of snow or snow showers will bring new accumulations of 2 to 4 inches over Rogers Pass and 4 to 6 inches over Marias Pass through Saturday morning. Brief periods of more intense snowfall with accumulation rates of one half inch or higher per hour is possible between midnight and 6 AM Saturday.

Slow down and use caution while traveling. The latest road conditions can be obtained by calling 5 1 1 or visiting the MDT Road Report website.

Cold Weather Advisory issued December 26 at 5:41PM MST until December 27 at 10:00PM MST by NWS Great Falls MT

Effective: Fri December 26, 2025, 5:41 PM
Expires: Sat December 27, 2025, 6:00 AM

* WHAT...Very cold wind chills as low as 35 below expected. * WHERE...Southern Rocky Mountain Front and adjacent foothills and plains, Cascade County, including the Little Belt and Highwood Mountains, Eastern Pondera and Eastern Teton Counties, Western and Central Chouteau County, and Judith Basin County and Judith Gap. * WHEN...From 10 AM to 10 PM MST Saturday. * IMPACTS...The dangerously cold wind chills as low as 35 below zero could cause frostbite on exposed skin in as little as 10 minutes.

Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves.

Winter Weather Advisory issued December 27 at 12:45AM MST until December 27 at 2:00PM MST by NWS Great Falls MT

Effective: Sat December 27, 2025, 12:45 AM
Expires: Sat December 27, 2025, 2:00 PM

* WHAT...Snow. Additional snow accumulations between 2 and 6 inches, with higher amounts above 6000 feet. Winds gusting as high as 40 mph. * WHERE...The Continental Divide along the Rocky Mountain Front. * WHEN...Until 2 PM MST this afternoon. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. * ADDITIONAL DETAILS...Brief periods of intense snowfall, with snowfall rates of one half of an inch per hour or higher, is possible through 6 AM Saturday.

Remember, a Winter Weather Advisory means that there is at least an 80% chance of minor impacts due to winter weather conditions during the advisory period.

Cold Weather Advisory issued December 27 at 12:40AM MST until December 27 at 10:00PM MST by NWS Great Falls MT

Effective: Sat December 27, 2025, 12:40 AM
Expires: Sat December 27, 2025, 5:00 PM

* WHAT...Very cold wind chills as low as 30 below expected. * WHERE...Southern Rocky Mountain Front and adjacent foothills and plains, Cascade County, including the Little Belt and Highwood Mountains, Eastern Pondera and Eastern Teton Counties, Western and Central Chouteau County, and Judith Basin County and Judith Gap. * WHEN...From 10 AM this morning to 10 PM MST this evening. * IMPACTS...The dangerously cold wind chills as low as 30 below zero could cause frostbite on exposed skin in as little as 30 minutes.

Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves.

Winter Weather Advisory issued December 26 at 5:56PM MST until December 27 at 2:00PM MST by NWS Great Falls MT

Effective: Fri December 26, 2025, 5:56 PM
Expires: Sat December 27, 2025, 6:15 AM

* WHAT...Periods of snow expected. Total snow accumulations 1 to 3 inches. Winds gusting as high as 40 mph. * WHERE...Big Belt, Bridger and Castle Mountains, Little Belt and Highwood Mountains, and Upper Blackfoot and MacDonald Pass. * WHEN...From midnight tonight to 2 PM MST Saturday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous.

Remember, a Winter Weather Advisory means that there is at least an 80% chance of minor impacts due to winter weather conditions during the advisory period.

Winter Weather Advisory issued December 27 at 12:45AM MST until December 27 at 2:00PM MST by NWS Great Falls MT

Effective: Sat December 27, 2025, 12:45 AM
Expires: Sat December 27, 2025, 2:00 PM

* WHAT...Snow. Additional snow accumulations up to 3 inches. Winds gusting as high as 45 mph. * WHERE...Big Belt, Bridger and Castle Mountains, Little Belt and Highwood Mountains, and Upper Blackfoot and MacDonald Pass. * WHEN...Until 2 PM MST this afternoon. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous.

Remember, a Winter Weather Advisory means that there is at least an 80% chance of minor impacts due to winter weather conditions during the advisory period.

Special Weather Statement issued December 27 at 3:56AM MST by NWS Great Falls MT

Effective: Sat December 27, 2025, 3:56 AM
Expires: Sat December 27, 2025, 6:00 AM

A Pacific cold front was moving east early this morning, with a band of moderate to at times heavy snow accompany the front. While snowfall accumulations are likely to remain below one inch through sunrise this morning a period of reduced visibility, with visibilities falling to as low as one mile, is likely to occur. In addition to the reduced visibility a period of strong and gusty winds of between 45 to 55 mph will occur. Travelers should be prepared for changing conditions and allow extra time to reach your destination.

Special Weather Statement issued December 27 at 3:53AM MST by NWS Great Falls MT

Effective: Sat December 27, 2025, 3:53 AM
Expires: Sat December 27, 2025, 6:00 AM

A Pacific cold front was moving east early this morning, with a band of moderate to at times heavy snow accompany the front. While snowfall accumulations are likely to remain below one inch through sunrise this morning a period of reduced visibility, with visibilities falling to as low as one mile, is likely to occur. In addition to the reduced visibility a period strong and gusty winds of between 45 to 55 mph will occur. Travelers should be prepared for changing conditions and allow extra time to reach your destination.