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Home Return to list Winter Weather Advisory 0033 Issued by the Denver / Boulder Forecast Office
Action: New Issued At: 2025-12-19 03:07:20 837 WWUS45 KBOU 190907 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 207 AM MST Fri Dec 19 2025 COZ031-033-034-200000- /O.NEW.KBOU.WW.Y.0033.251220T0700Z-251221T0700Z/ West Jackson and West Grand Counties Above 9000 Feet-South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet-South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet- Including the cities of Laramie and Medicine Bow Mountains, East Slopes Mosquito Range, Mount Blue Sky, Breckenridge, Indian Peaks, Williams Fork Mountains, Rabbit Ears Range, Kenosha Mountains, Willow Creek Pass, Berthoud Pass, East Slopes Southern Gore Range, Cameron Pass, Eisenhower Tunnel, Winter Park, Mt Zirkel, and Rocky Mountain National Park 207 AM MST Fri Dec 19 2025 ...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO MIDNIGHT MST SATURDAY NIGHT... * WHAT...Snow expected. Total snow accumulations of 4 to 12 inches. Winds gusting as high as 60 mph. * WHERE...Rabbit Ears Pass, Rocky Mountain National Park and the Medicine Bow Range, and The Mountains of Summit County, the Mosquito Range, and the Indian Peaks. * WHEN...From midnight tonight to midnight MST Saturday Night. * IMPACTS...Travel could be very difficult across the mountain passes, especially Saturday morning. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for Colorado can be obtained by calling 5 1 1 or by going to www.cotrip.org. && $$ For more information from the National Weather Service, visit https://weather.gov/bou Schlatter Action: Continued Issued At: 2025-12-19 16:14:56 938 WWUS45 KBOU 192214 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 314 PM MST Fri Dec 19 2025 COZ031-033-034-201300- /O.CON.KBOU.WW.Y.0033.251220T0700Z-251221T0700Z/ West Jackson and West Grand Counties Above 9000 Feet-South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet-South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet- Including the cities of Berthoud Pass, Breckenridge, Willow Creek Pass, East Slopes Mosquito Range, Laramie and Medicine Bow Mountains, Kenosha Mountains, Williams Fork Mountains, Winter Park, Rabbit Ears Range, Rocky Mountain National Park, East Slopes Southern Gore Range, Indian Peaks, Cameron Pass, Mount Blue Sky, Mt Zirkel, and Eisenhower Tunnel 314 PM MST Fri Dec 19 2025 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO MIDNIGHT MST SATURDAY NIGHT... * WHAT...Snow and blowing snow expected. Total snow accumulations 3 to 8 inches, except 12 inches or more in the Park Range. Winds gusting as high as 60 mph, strongest early in the event. * WHERE...Rabbit Ears Pass, Rocky Mountain National Park and the Medicine Bow Range, and The Mountains of Summit County, the Mosquito Range, and the Indian Peaks. * WHEN...From midnight tonight to midnight MST Saturday Night. * IMPACTS...Travel could be very difficult across the mountain passes, especially late tonight through early Saturday afternoon when the bulk of the snow will fall. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for Colorado can be obtained by calling 5 1 1 or by going to www.cotrip.org. && $$ For more information from the National Weather Service, visit https://weather.gov/bou 20 Action: Continued Issued At: 2025-12-19 22:25:36 052 WWUS45 KBOU 200425 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 925 PM MST Fri Dec 19 2025 COZ031-033-034-201300- /O.CON.KBOU.WW.Y.0033.251220T0700Z-251221T0700Z/ West Jackson and West Grand Counties Above 9000 Feet-South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet-South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet- Including the cities of Berthoud Pass, Breckenridge, Willow Creek Pass, East Slopes Mosquito Range, Laramie and Medicine Bow Mountains, Kenosha Mountains, Williams Fork Mountains, Winter Park, Rabbit Ears Range, Rocky Mountain National Park, East Slopes Southern Gore Range, Indian Peaks, Cameron Pass, Mount Blue Sky, Mt Zirkel, and Eisenhower Tunnel 925 PM MST Fri Dec 19 2025 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MST SATURDAY NIGHT... * WHAT...Snow and blowing snow expected. Total snow accumulations ranging from 2-6 inches in the I-70 mountain corridor to 3-8 inches in the northern tier of mountains. Up to 12 inches or more can be expected in the Park Range north of Rabbit Ears Pass. Winds gusting as high as 60 mph, strongest early in the event. * WHERE...Rabbit Ears Pass, Rocky Mountain National Park and the Medicine Bow Range, and The Mountains of Summit County, the Mosquito Range, and the Indian Peaks. * WHEN...Until midnight MST Saturday Night. * IMPACTS...Travel could be difficult across the mountain passes, especially late tonight through early Saturday afternoon when the bulk of the snow will fall. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for Colorado can be obtained by calling 5 1 1 or by going to www.cotrip.org. && $$ For more information from the National Weather Service, visit https://weather.gov/bou 20 Action: Continued Issued At: 2025-12-20 04:34:35 254 WWUS45 KBOU 201034 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 334 AM MST Sat Dec 20 2025 COZ031-033-034-210700- /O.CON.KBOU.WW.Y.0033.000000T0000Z-251221T0700Z/ West Jackson and West Grand Counties Above 9000 Feet-South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet-South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet- Including the cities of Rocky Mountain National Park, Eisenhower Tunnel, Rabbit Ears Range, Cameron Pass, Indian Peaks, Berthoud Pass, East Slopes Mosquito Range, Mount Blue Sky, Kenosha Mountains, Breckenridge, Mt Zirkel, East Slopes Southern Gore Range, Laramie and Medicine Bow Mountains, Winter Park, Willow Creek Pass, and Williams Fork Mountains 334 AM MST Sat Dec 20 2025 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MST TONIGHT... * WHAT...Snow and blowing snow expected. Total snow accumulations ranging from 2-6 inches in the I-70 mountain corridor to 3-8 inches in the northern tier of mountains. Up to 12 inches or more can be expected in the Park Range north of Rabbit Ears Pass. Winds gusting as high as 60 mph, strongest early in the event. * WHERE...Rabbit Ears Pass, Rocky Mountain National Park and the Medicine Bow Range, and The Mountains of Summit County, the Mosquito Range, and the Indian Peaks. * WHEN...Until midnight MST tonight. * IMPACTS...Travel could be difficult across the mountain passes, especially through early this afternoon when the bulk of the snow will fall. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for Colorado can be obtained by calling 5 1 1 or by going to www.cotrip.org. && $$ For more information from the National Weather Service, visit https://weather.gov/bou 63 Action: Continued Issued At: 2025-12-20 14:03:53 210 WWUS45 KBOU 202003 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 103 PM MST Sat Dec 20 2025 COZ031-033-034-210700- /O.CON.KBOU.WW.Y.0033.000000T0000Z-251221T0700Z/ West Jackson and West Grand Counties Above 9000 Feet-South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet-South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet- Including the cities of East Slopes Mosquito Range, Mt Zirkel, Berthoud Pass, Indian Peaks, Breckenridge, East Slopes Southern Gore Range, Kenosha Mountains, Willow Creek Pass, Rocky Mountain National Park, Mount Blue Sky, Cameron Pass, Eisenhower Tunnel, Williams Fork Mountains, Winter Park, Rabbit Ears Range, and Laramie and Medicine Bow Mountains 103 PM MST Sat Dec 20 2025 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MST TONIGHT... * WHAT...Snow and blowing snow. Additional snow accumulations up to 3 inches. Winds gusting as high as 50 mph. * WHERE...Rabbit Ears Pass, Rocky Mountain National Park and the Medicine Bow Range, and The Mountains of Summit County, the Mosquito Range, and the Indian Peaks. * WHEN...Until midnight MST tonight. * IMPACTS...Plan on slippery road conditions, especially over the high mountain passes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for Colorado can be obtained by calling 5 1 1 or by going to www.cotrip.org. && $$ For more information from the National Weather Service, visit https://weather.gov/bou Hiris Action: Cancelled Issued At: 2025-12-20 21:55:35 758 WWUS45 KBOU 210355 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 855 PM MST Sat Dec 20 2025 COZ031-033-034-210500- /O.CAN.KBOU.WW.Y.0033.000000T0000Z-251221T0700Z/ West Jackson and West Grand Counties Above 9000 Feet-South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet-South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet- Including the cities of East Slopes Mosquito Range, Kenosha Mountains, East Slopes Southern Gore Range, Mount Blue Sky, Mt Zirkel, Cameron Pass, Berthoud Pass, Willow Creek Pass, Williams Fork Mountains, Winter Park, Indian Peaks, Laramie and Medicine Bow Mountains, Rocky Mountain National Park, Rabbit Ears Range, Breckenridge, and Eisenhower Tunnel 855 PM MST Sat Dec 20 2025 ...WINTER WEATHER ADVISORY IS CANCELLED... There may still be some slick spots on roads, mainly for the high passes, but the main threat has ended. $$ For more information from the National Weather Service, visit https://weather.gov/bou 09 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||