150 WWUS55 KTFX 172000 SQWTFX Snow Squall Warning National Weather Service Great Falls MT 100 PM MST Wed Dec 17 2025 MTC013-049-172015- /O.CON.KTFX.SQ.W.0005.000000T0000Z-251217T2015Z/ Lewis and Clark MT-Cascade MT- 100 PM MST Wed Dec 17 2025 ...A SNOW SQUALL WARNING REMAINS IN EFFECT UNTIL 115 PM MST FOR EAST CENTRAL LEWIS AND CLARK AND CASCADE COUNTIES... At 1259 PM MST, a dangerous snow squall was located along a line extending from Great Falls to near Wolf Creek, moving east at 105 mph. HAZARD...Flash freeze on roads. Whiteout conditions with near zero visibility associated with intense bursts of heavy snow and gusty winds leading to blowing snow. Wind gusts greater than 50 mph could knock down tree limbs and blow around unsecured objects. SOURCE...Radar indicated. IMPACT...Dangerous and life-threatening travel conditions are expected to develop rapidly in the warning area. This will impact Interstate 15 between Mid Canon and Sun Prairie, or between mile markers 219 and 286. Locations impacted include... Great Falls, Cascade, Belt, Black Eagle, Wolf Creek, Monarch, Sluice Boxes State Park, Eden, Malmstrom Afb, Stockett, Tracy, First Peoples Buffalo Jump State Park, Centerville, Tower Rock State Park, Armington, Craig, Ulm, and Sand Coulee. PRECAUTIONARY/PREPAREDNESS ACTIONS... Wet roadways will quickly freeze. Black ice will cause roads, bridges, and overpasses to become slick and dangerous. Slow down and be prepared for a sudden loss of traction. Consider avoiding or delaying travel until the snow squall passes your location. If you must travel, use extra caution and allow extra time. Rapid changes in visibility and slick road conditions may lead to accidents. && LAT...LON 4754 11158 4755 11090 4752 11077 4744 11076 4744 11064 4736 11064 4736 11076 4730 11079 4710 11077 4699 11095 4701 11108 4708 11108 4709 11116 4701 11117 4700 11153 4692 11154 4691 11165 4689 11161 4687 11164 4693 11253 TIME...MOT...LOC 1959Z 272DEG 93KT 4749 11133 4698 11213 SNOW SQUALL...RADAR INDICATED SNOW SQUALL IMPACT...SIGNIFICANT $$ Ludwig  515 WWUS55 KTFX 172014 SQWTFX Snow Squall Warning National Weather Service Great Falls MT 114 PM MST Wed Dec 17 2025 MTC013-049-172024- /O.EXP.KTFX.SQ.W.0005.000000T0000Z-251217T2015Z/ Lewis and Clark MT-Cascade MT- 114 PM MST Wed Dec 17 2025 ...THE SNOW SQUALL WARNING FOR EAST CENTRAL LEWIS AND CLARK AND CASCADE COUNTIES WILL EXPIRE AT 115 PM MST... The snow squall that prompted the warning has exited the area and is moving away from Interstate 15. Therefore, the snow squall warning will be allowed to expire. Areas of blowing snow and wind gusts in excess of 70 mph will continue to make travel difficult. && LAT...LON 4754 11158 4755 11090 4752 11077 4744 11076 4744 11064 4736 11064 4736 11076 4730 11079 4710 11077 4699 11095 4701 11108 4708 11108 4709 11116 4701 11117 4700 11153 4692 11154 4691 11165 4689 11161 4687 11164 4693 11253 TIME...MOT...LOC 2014Z 272DEG 93KT 4748 11081 4697 11161 $$ Ludwig  368 FZAK77 PAJK 172053 MWSAJK Marine Weather Statement National Weather Service Juneau AK 1153 AM AKST Wed Dec 17 2025 PKZ053-182100- Yakutat Bay- 1153 AM AKST Wed Dec 17 2025 ...HEAVY FREEZING SPRAY CONTINUES... Sustained northeast winds of strong gale force is likely impacting Disenchantment Bay, with gale force for most of Yakutat Bay, bringing concerns for heavy freezing spray. Winds look to continue through the weekend with the threat of heavy freezing spray persisting. $$ PKZ011>013-021-022-031-032-182100- Glacier Bay-Northern Lynn Canal-Southern Lynn Canal-Icy Strait- Cross Sound-Stephens Passage-Northern Chatham Strait- 1153 AM AKST Wed Dec 17 2025 Cold arctic air is beginning to dominate the Panhandle, forming gale force to strong gale force outflow conditions along and north of the Icy Strait Corridor (Cross Sound to Taku Inlet). Heavy freezing spray is becoming more wide spread Wednesday and will likely continue into the weekend for Glacier Bay, Lynn Canal, and Taku Inlet. This threat is likely in areas near Pt. Couverden and Scull Island as well. Mariners should use extreme caution if attempting to navigate the central and northern inner channels over the next several days. $$