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Home Return to list Winter Weather Advisory 0030 Issued by the Denver / Boulder Forecast Office
Action: New Issued At: 2025-12-04 03:20:44 176 WWUS45 KBOU 040920 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 220 AM MST Thu Dec 4 2025 COZ031-042315- /O.NEW.KBOU.WW.Y.0030.251205T0700Z-251206T0000Z/ /O.NEW.KBOU.WS.A.0007.251206T0000Z-251207T1500Z/ West Jackson and West Grand Counties Above 9000 Feet- Including the cities of Mt Zirkel 220 AM MST Thu Dec 4 2025 ...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 5 PM MST FRIDAY... ...WINTER STORM WATCH IN EFFECT FROM FRIDAY EVENING THROUGH EARLY SUNDAY MORNING... * WHAT...For the Winter Weather Advisory, snow expected. Total snow accumulations between 4 and 8 inches. Winds gusting as high as 40 mph. For the Winter Storm Watch, heavy wind driven snow possible. Total snow accumulations between 12 and 24 inches possible. Winds could gust as high as 55 mph. * WHERE...Rabbit Ears Pass. * WHEN...For the Winter Weather Advisory, from midnight tonight to 5 PM MST Friday. For the Winter Storm Watch, from Friday evening through early Sunday morning. * IMPACTS...Travel will be slick and hazardous late tonight and Friday due to snow and blowing snow. By Friday night through Saturday night, travel could be very difficult to impossible. Road closures are possible. 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. It is strongly recommended to alter travel plans in the northern Colorado mountains Friday night through Saturday night. Travel may become very difficult to impossible. Monitor the latest forecasts for updates on this winter storm. && $$ COZ033-034-042315- /O.NEW.KBOU.WS.A.0007.251206T0000Z-251207T1500Z/ South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet-South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet- Including the cities of Winter Park, East Slopes Mosquito Range, Rabbit Ears Range, Berthoud Pass, Kenosha Mountains, Williams Fork Mountains, Rocky Mountain National Park, Cameron Pass, Eisenhower Tunnel, East Slopes Southern Gore Range, Mount Blue Sky, Breckenridge, Indian Peaks, Willow Creek Pass, and Laramie and Medicine Bow Mountains 220 AM MST Thu Dec 4 2025 ...WINTER STORM WATCH IN EFFECT FROM FRIDAY EVENING THROUGH EARLY SUNDAY MORNING... * WHAT...Heavy wind driven snow possible. Total snow accumulations between 8 and 14 inches possible. Winds could gust as high as 55 mph. * WHERE...Rocky Mountain National Park and the Medicine Bow Range, and The Mountains of Summit County, the Mosquito Range, and the Indian Peaks. * WHEN...From Friday evening through early Sunday morning. * IMPACTS...Travel could be very difficult and road closures are possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... It is strongly recommended to alter travel plans in the northern Colorado mountains Friday night through Saturday night. Travel may become very difficult to impossible. Monitor the latest forecasts for updates on this winter storm. && $$ For more information from the National Weather Service, visit https://weather.gov/bou 20 Action: Time Extended Issued At: 2025-12-04 15:21:58 696 WWUS45 KBOU 042121 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 221 PM MST Thu Dec 4 2025 COZ031-051315- /O.UPG.KBOU.WS.A.0007.251206T0000Z-251207T1500Z/ /O.NEW.KBOU.WS.W.0007.251206T0600Z-251207T0600Z/ /O.EXT.KBOU.WW.Y.0030.251205T0700Z-251206T0600Z/ West Jackson and West Grand Counties Above 9000 Feet- Including the cities of Mt Zirkel 221 PM MST Thu Dec 4 2025 ...WINTER STORM WARNING IN EFFECT FROM FRIDAY NIGHT INTO SATURDAY NIGHT... ...WINTER WEATHER ADVISORY NOW IN EFFECT FROM MIDNIGHT TONIGHT TO 11 PM MST FRIDAY... * WHAT...For the Winter Weather Advisory, snow expected. Total snow accumulations between 4 and 8 inches. Winds gusting as high as 45 mph. For the Winter Storm Watch, heavy wind driven snow possible. Total snow accumulations between 12 and 24 inches possible. Winds could gust as high as 55 mph. * WHERE...Rabbit Ears Pass. * WHEN...For the Winter Weather Advisory, from midnight tonight to 11 PM MST Friday. For the Winter Storm Warning, from 11 PM Friday to 11 PM MST Saturday. * IMPACTS...Travel will be slick and hazardous late tonight and Friday due to snow and blowing snow. By Friday night through Saturday night, travel could be very difficult to impossible. Road closures are possible. 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. It is strongly recommended to alter travel plans in the northern Colorado mountains Friday night through Saturday night. Travel may become very difficult to impossible. Monitor the latest forecasts for updates on this winter storm. && $$ COZ033-034-051315- /O.UPG.KBOU.WS.A.0007.251206T0000Z-251207T1500Z/ /O.NEW.KBOU.WS.W.0007.251206T0600Z-251207T0600Z/ South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet-South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet- Including the cities of Eisenhower Tunnel, Williams Fork Mountains, Berthoud Pass, Cameron Pass, Breckenridge, Indian Peaks, Willow Creek Pass, East Slopes Southern Gore Range, Winter Park, Rocky Mountain National Park, Laramie and Medicine Bow Mountains, Kenosha Mountains, Rabbit Ears Range, Mount Blue Sky, and East Slopes Mosquito Range 221 PM MST Thu Dec 4 2025 ...WINTER STORM WARNING IN EFFECT FROM 11 PM FRIDAY TO 11 PM MST SATURDAY... * WHAT...Heavy snow and blowing snow expected. Total snow accumulations between 7 and 14 inches. Winds gusting as high as 55 mph. * WHERE...Rocky Mountain National Park and the Medicine Bow Range, and The Mountains of Summit County, the Mosquito Range, and the Indian Peaks. * WHEN...From 11 PM Friday to 11 PM MST Saturday. * IMPACTS...Travel could be very difficult and road closures are possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... It is strongly recommended to alter travel plans in the northern Colorado mountains Friday night through Saturday night. Travel may become very difficult to impossible. Monitor the latest forecasts for updates on this winter storm. If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for Colorado can be obtained by calling 5 1 1 or by going to www.cotrip.org. && $$ For more information from the National Weather Service, visit https://weather.gov/bou Hiris Action: Continued Issued At: 2025-12-05 03:23:54 076 WWUS45 KBOU 050923 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 223 AM MST Fri Dec 5 2025 COZ031-052215- /O.CON.KBOU.WS.W.0007.251206T0600Z-251207T0600Z/ /O.CON.KBOU.WW.Y.0030.000000T0000Z-251206T0600Z/ West Jackson and West Grand Counties Above 9000 Feet- Including the cities of Mt Zirkel 223 AM MST Fri Dec 5 2025 ...WINTER STORM WARNING IN EFFECT FROM FRIDAY NIGHT INTO SATURDAY NIGHT... ...WINTER WEATHER ADVISORY IN EFFECT NOW THROUGH 11 PM MST FRIDAY... * WHAT...For the Winter Weather Advisory, snow expected. Total snow accumulations between 4 and 8 inches. Winds gusting as high as 45 mph. For the Winter Storm Warning, heavy wind driven snow possible. Total snow accumulations between 12 and 24 inches possible. Winds could gust as high as 55 mph. * WHERE...Rabbit Ears Pass. * WHEN...For the Winter Weather Advisory, from now through 5 PM MST Friday. For the Winter Storm Warning, from Friday evening through early Sunday morning. * IMPACTS...Travel will be slick and hazardous on Friday due to snow and blowing snow. By Friday night through Saturday night, travel could be very difficult to impossible. Road closures are possible. 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. It is strongly recommended to alter travel plans in the northern Colorado mountains Friday night through Saturday night. Travel may become very difficult to impossible. Monitor the latest forecasts for updates on this winter storm. && $$ COZ033-034-052215- /O.CON.KBOU.WS.W.0007.251206T0600Z-251207T0600Z/ South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet-South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet- Including the cities of Winter Park, Berthoud Pass, Mount Blue Sky, Willow Creek Pass, Rabbit Ears Range, Indian Peaks, Kenosha Mountains, Williams Fork Mountains, East Slopes Southern Gore Range, Laramie and Medicine Bow Mountains, East Slopes Mosquito Range, Cameron Pass, Eisenhower Tunnel, Breckenridge, and Rocky Mountain National Park 223 AM MST Fri Dec 5 2025 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO 11 PM MST SATURDAY... * WHAT...Heavy snow and blowing snow expected. Total snow accumulations between 7 and 14 inches. Winds gusting as high as 55 mph. * WHERE...Rocky Mountain National Park and the Medicine Bow Range, and The Mountains of Summit County, the Mosquito Range, and the Indian Peaks. * WHEN...From 11 PM this evening to 11 PM MST Saturday. * IMPACTS...Travel could be very difficult and road closures are possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... It is strongly recommended to alter travel plans in the northern Colorado mountains Friday night through Saturday night. Travel may become very difficult to impossible. Monitor the latest forecasts for updates on this winter storm. If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for Colorado can be obtained by calling 5 1 1 or by going to www.cotrip.org. && $$ For more information from the National Weather Service, visit https://weather.gov/bou 22 Action: Continued Issued At: 2025-12-05 14:35:22 379 WWUS45 KBOU 052035 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 135 PM MST Fri Dec 5 2025 COZ032-060630- /O.EXA.KBOU.WS.W.0007.251206T0600Z-251207T0600Z/ Grand and Summit Counties Below 9000 Feet- Including the cities of Fraser, Grand Lake, Hot Sulphur Springs, Dillon, Granby, and Kremmling 135 PM MST Fri Dec 5 2025 ...WINTER STORM WARNING IN EFFECT FROM 11 PM THIS EVENING TO 11 PM MST SATURDAY... * WHAT...Heavy snow and blowing snow expected. Total snow accumulations between 5 and 11 inches. Winds gusting as high as 50 mph. * WHERE...Grand and Summit Counties Below 9000 Feet. * WHEN...From 11 PM this evening to 11 PM MST Saturday. * IMPACTS...Snow and blowing snow could reduce visibility to a quarter mile or less. Travel could be very difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for Colorado can be obtained by calling 5 1 1 or by going to www.cotrip.org. && $$ COZ031-060630- /O.CON.KBOU.WS.W.0007.251206T0600Z-251207T0600Z/ /O.CON.KBOU.WW.Y.0030.000000T0000Z-251206T0600Z/ West Jackson and West Grand Counties Above 9000 Feet- Including the cities of Mt Zirkel 135 PM MST Fri Dec 5 2025 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING... ...WINTER STORM WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO 11 PM MST SATURDAY... * WHAT...For the Winter Weather Advisory, snow. Additional snow accumulations between 2 and 5 inches. Winds gusting as high as 40 mph. For the Winter Storm Warning, heavy snow and blowing snow expected. Total snow accumulations between 12 and 24 inches, with isolated totals up to 30 inches possible. Winds gusting as high as 65 mph. * WHERE...Rabbit Ears Pass. * WHEN...For the Winter Weather Advisory, until 11 PM MST this evening. For the Winter Storm Warning, from 11 PM this evening to 11 PM MST Saturday. * IMPACTS...Travel will be very difficult to impossible. Widespread blowing snow could significantly reduce visibility. * ADDITIONAL DETAILS...The heaviest snow is expected to fall late tonight through the first half of Saturday. Significant blowing snow is expected as winds increase late Saturday morning into Saturday afternoon. PRECAUTIONARY/PREPAREDNESS ACTIONS... It is strongly recommended to alter travel plans in the northern Colorado mountains Friday night through Saturday night. If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for Colorado can be obtained by calling 5 1 1 or by going to www.cotrip.org. && $$ COZ033-034-060630- /O.CON.KBOU.WS.W.0007.251206T0600Z-251207T0600Z/ 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, East Slopes Southern Gore Range, Winter Park, Laramie and Medicine Bow Mountains, Breckenridge, East Slopes Mosquito Range, Williams Fork Mountains, Cameron Pass, Indian Peaks, Rabbit Ears Range, Mount Blue Sky, Kenosha Mountains, Eisenhower Tunnel, Rocky Mountain National Park, and Willow Creek Pass 135 PM MST Fri Dec 5 2025 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO 11 PM MST SATURDAY... * WHAT...Heavy snow and blowing snow expected. Total snow accumulations between 7 and 15 inches, with isolated totals up to 20 inches possible. Winds gusting as high as 65 mph. * WHERE...Rocky Mountain National Park and the Medicine Bow Range, and The Mountains of Summit County, the Mosquito Range, and the Indian Peaks. * WHEN...From 11 PM this evening to 11 PM MST Saturday. * IMPACTS...Snow and blowing snow will reduce visibility to a quarter mile or less. Near blizzard conditions are possible, especially Saturday morning. Travel will be very difficult to impossible, with road closures possible. * ADDITIONAL DETAILS...The heaviest snow is expected to fall late tonight through the first half of Saturday, with light to moderate snow Saturday afternoon and Saturday night. Significant blowing snow is expected as winds increase late Saturday morning into Saturday afternoon. PRECAUTIONARY/PREPAREDNESS ACTIONS... It is strongly recommended to alter travel plans in the Colorado mountains Friday night through Saturday night. If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for Colorado can be obtained by calling 5 1 1 or by going to www.cotrip.org. && $$ COZ030-060630- /O.NEW.KBOU.WW.Y.0031.251206T0600Z-251207T0600Z/ Jackson County Below 9000 Feet- Including the cities of North Park, Rand, Spicer, Gould, and Walden 135 PM MST Fri Dec 5 2025 ...WINTER WEATHER ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO 11 PM MST SATURDAY... * WHAT...Snow and blowing snow expected. Total snow accumulations between 3 and 8 inches. Winds gusting as high as 50 mph. * WHERE...North Park. * WHEN...From 11 PM this evening to 11 PM MST Saturday. * IMPACTS...Travel could be very difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for Colorado can be obtained by calling 5 1 1 or by going to www.cotrip.org. && $$ For more information from the National Weather Service, visit https://weather.gov/bou Hiris | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||