Special Weather Statement issued May 14 at 6:09AM MDT by NWS Great Falls MT
Moderate to heavy snow will continue to fall across the Beaverhead and Western Madison County Valleys, with 1 to localized 2 inches of slushy snow accumulations. With surface temperatures near freezing this morning elevated surfaces like bridges and overpasses, along with where roads are shaded from hills and tress, may become slippery. Travelers should be prepared for winter driving conditions, along with reduced visibilities to as low as one half of a mile. Slow down, allow extra time to travel this morning, and be prepared for changing road conditions.
Winter Weather Advisory issued May 13 at 2:13PM MDT until May 14 at 9:00AM MDT by NWS Great Falls MT
* WHAT...Snow expected. Total snow accumulations of 4 to 8 inches at pass level, with higher amounts above pass level. * WHERE...The Mountains of Southwestern Montana south of Interstate 90. * WHEN...From 8 PM this evening to 9 AM MDT Wednesday. * IMPACTS...Higher mountain passes will likely become snow covered and slippery. Those recreating in the backcountry should prepare for winter conditions. * ADDITIONAL DETAILS...Above 8,000 ft, heavy snow accumulations of up to a foot and above is expected in the Madison and Gallatin County Mountains.
Winter Weather Advisory issued May 12 at 1:23PM MDT until May 13 at 9:00AM MDT by NWS Great Falls MT
* WHAT...Snow expected. Total snow accumulations of 3 to 8 inches above 7000 feet. Isolated higher amounts around Pony. * WHERE...The Mountains of Southwestern Montana south of Interstate 90, and Elkhorn and Boulder Mountains. * WHEN...From 8 PM this evening to 9 AM MDT Tuesday. * IMPACTS...Higher mountain passes will likely become snow covered and slippery.
Hydrologic Outlook issued May 11 at 10:18AM MDT by NWS Great Falls MT
ESFTFX Despite cooler temperatures expected this week, the recent string of warm daytime and mild overnight temperatures has spurred an increase in high elevation snowmelt, resulting in within bank rises on some creeks and upper tributary rivers near the mountains. Scattered precipitation through Monday may add to some localized runoff but widespread precipitation expected to develop across primarily central and southwest Montana Tuesday and Wednesday is likely to fall as snow at elevations where a lingering snowpack exists. Significant rises are not expected on larger rivers, but some creeks and small rivers in the mountains and adjacent foothills may reach
Special Weather Statement issued May 11 at 5:31PM MDT by NWS Great Falls MT
At 530 PM MDT, Doppler radar was tracking strong thunderstorms along a line extending from 10 miles west of Geyser to 25 miles southwest of Hobson. Movement was northeast at 45 mph. HAZARD...Wind gusts of 50 to 55 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include... Windham, Denton, Sapphire Village, Utica, Moore, Danvers, Checkerboard, Neihart, Buffalo, Lewistown, Raynesford, Geraldine, Moccasin, Monarch, Martinsdale, Sluice Boxes State Park, Ackley Lake State Park, Glengarry, Garneill, and Hobson.
Special Weather Statement issued May 10 at 7:42PM MDT by NWS Great Falls MT
At 742 PM MDT, Doppler radar was tracking strong thunderstorms along a line extending from 9 miles south of Roy to 9 miles northwest of Roundup. Movement was northeast at 40 mph. HAZARD...Wind gusts up to 50 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include... Giltedge, Grass Range, Roy, Fergus, and Forestgrove.
Severe Thunderstorm Warning issued May 10 at 7:42PM MDT until May 10 at 8:45PM MDT by NWS Great Falls MT
SVRTFX The National Weather Service in Great Falls has issued a * Severe Thunderstorm Warning for... Northwestern Blaine County in north central Montana... Northeastern Hill County in north central Montana... * Until 845 PM MDT. * At 741 PM MDT, severe thunderstorms were located along a line extending from 10 miles northwest of Beaver Creek to 9 miles southeast of Havre, moving northeast at 40 mph. HAZARD...60 mph wind gusts. SOURCE...Havre Airport reported a 63 mph gust at 704 pm. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Lohman, Beaver Creek, Havre, Kremlin, Chinook, and Hogeland.
Severe Thunderstorm Warning issued May 10 at 7:40PM MDT until May 10 at 7:45PM MDT by NWS Great Falls MT
The storms which prompted the warning have weakened below severe limits, and no longer pose an immediate threat to life or property. Therefore, the warning will be allowed to expire. However, gusty winds are still possible with these thunderstorms.
Severe Thunderstorm Warning issued May 10 at 7:35PM MDT until May 10 at 8:00PM MDT by NWS Great Falls MT
At 735 PM MDT, severe thunderstorms were located along a line extending from 12 miles southeast of The Knees to Highwood, moving northeast at 45 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Highwood, Shonkin, Floweree, Carter, and Portage.
High Wind Watch issued May 10 at 1:38PM MDT until May 12 at 6:00PM MDT by NWS Great Falls MT
* WHAT...Southwest winds 20 to 40 mph with gusts up to 60 mph possible. * WHERE...The Madison and Beaverhead River Valleys, Ruby Mountains and Southern Beaverhead Mountains, and Gallatin and Madison County Mountains and Centennial Mountains. * WHEN...From Monday morning through Monday afternoon. * IMPACTS...High winds may move loose debris, damage property and cause power outages. Travel could be difficult, especially for high profile vehicles.