Alert archive / Colorado / Winter Storm Warnings in 2021
Winter Storm Warning 2, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this winter storm warning at Feb 4, 2021, 3:30 AM MST for Grand County, Jackson County, Colorado. It took effect at Feb 4, 2021, 5:00 PM MST. It was in force for 36 hr. 4 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Feb 4, 2021, 3:30 AM MST (10:30 UTC)
- In effect from
- Feb 4, 2021, 5:00 PM MST
- Expired
- Feb 6, 2021, 5:00 AM MST
- In force
- 36 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Grand County, CO, Jackson County, CO
The radar
The Cheyenne radar (KCYS), 147 km from the middle of the area, began a volume at 10:35 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Feb 5, 7:00 AM MST | SNOW 2.1 | 2 Ssw Elkdale, CO | COCORAHS STATION CO-GR-68 TABERNASH 2.7 NW. |
| Feb 5, 7:00 AM MST | SNOW 5 | 2 Ssw Fraser, CO | |
| Feb 5, 8:00 AM MST | SNOW 9 | 1 Nne Rabbit Ears Pass, CO | COLUMBINE SNOTEL: ESTIMATED USING A 15 TO 1 SNOW TO LIQUID RATIO. |
| Feb 5, 8:00 AM MST | SNOW 10.5 | 11 Nnw Rabbit Ears Pass, CO | TOWER SNOTEL: ESTIMATED USING A 15 TO 1 SNOW TO LIQUID RATIO. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Grand Junction, CO (KGJT), launched 00:00Z, 10.5 hours before the alert went out and 239 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1056 m above ground
- 0-6 km bulk shear
- 70 kt
- 0-1 km storm-relative helicity
- -47 m²/s²
- 0-3 km storm-relative helicity
- -13 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
559 WWUS45 KBOU 041030 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 330 AM MST Thu Feb 4 2021 COZ031-041830- /O.NEW.KBOU.WS.W.0002.210205T0000Z-210206T1200Z/ /O.CON.KBOU.WW.Y.0005.000000T0000Z-210204T1600Z/ West Jackson and West Grand Counties Above 9000 Feet- Including the cities of Mt Zirkel 330 AM MST Thu Feb 4 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MST THIS MORNING... ...WINTER STORM WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 AM MST SATURDAY... * WHAT...Snow and blowing snow decreasing this morning. The snow and wind will increase again tonight and continue through Friday night. The snow may be heavy at times on Friday. Total new snow accumulations of 10 to 18 inches by late Friday night. Winds gusting up to 50 mph. * WHERE...Rabbit Ears Pass. * WHEN...For the Winter Storm Warning, from 5 PM this afternoon to 5 AM MST Saturday. For the Winter Weather Advisory, until 9 AM MST this morning. * IMPACTS...Travel could be very difficult late tonight through Friday night. Visibilities may drop below 1/4 mile due to falling and blowing snow. 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 the state you are calling from can be obtained by calling 5 1 1. Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ COZ034-041500- /O.CON.KBOU.WS.W.0001.000000T0000Z-210204T1500Z/ South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet- Including the cities of Indian Peaks, Eisenhower Tunnel, East Slopes Southern Gore Range, Mount Evans, East Slopes Mosquito Range, Breckenridge, Winter Park, Williams Fork Mountains, Kenosha Mountains, and Berthoud Pass 330 AM MST Thu Feb 4 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 8 AM MST THIS MORNING... * WHAT...Snow and blowing snow decreasing this morning. Additional snow accumulations of 1 to 2 inches. * WHERE...The Mountains of Summit County, the Mosquito Range, and the Indian Peaks. * WHEN...Until 8 AM MST this morning. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact this mornings commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ COZ033-041600- /O.CON.KBOU.WW.Y.0005.000000T0000Z-210204T1600Z/ South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet- Including the cities of Laramie and Medicine Bow Mountains, Rabbit Ears Range, Cameron Pass, Rocky Mountain National Park, and Willow Creek Pass 330 AM MST Thu Feb 4 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MST THIS MORNING... * WHAT...Snow and blowing snow decreasing this morning. Additional accumulations of 1 to 2 inches. Winds gusting up to 50 mph. * WHERE...Rocky Mountain National Park and the Medicine Bow Range. * WHEN...Until 9 AM MST this morning. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact this mornings commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ For more information from the National Weather Service, visit https://weather.gov/bou RPK
7 follow-up statements
183 WWUS45 KBOU 041458 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 758 AM MST Thu Feb 4 2021 COZ034-041600- /O.EXP.KBOU.WS.W.0001.000000T0000Z-210204T1500Z/ South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet- Including the cities of Indian Peaks, Eisenhower Tunnel, East Slopes Southern Gore Range, Mount Evans, East Slopes Mosquito Range, Breckenridge, Winter Park, Williams Fork Mountains, Kenosha Mountains, and Berthoud Pass 758 AM MST Thu Feb 4 2021 ...WINTER STORM WARNING WILL EXPIRE AT 8 AM MST THIS MORNING... Road conditions should generally improve during the day, though exposed higher areas will continue to have areas of blowing and drifting snow. $$ COZ031-042300- /O.CAN.KBOU.WW.Y.0005.000000T0000Z-210204T1600Z/ /O.CON.KBOU.WS.W.0002.210205T0000Z-210206T1200Z/ West Jackson and West Grand Counties Above 9000 Feet- Including the cities of Mt Zirkel 758 AM MST Thu Feb 4 2021 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 AM MST SATURDAY... ...WINTER WEATHER ADVISORY IS CANCELLED... * WHAT...Only light snow is expected today. The snow and wind will increase again tonight and continue through Friday night. The snow may be heavy at times on Friday. Total new snow accumulations of 10 to 18 inches are expected by late Friday night, with winds gusting up to 50 mph. * WHERE...Rabbit Ears Pass. * WHEN...From 5 PM this afternoon to 5 AM MST Saturday. * IMPACTS...Travel could be very difficult to impossible on Friday and Friday night. Visibilities may drop below 1/4 mile due to falling and blowing snow. PRECAUTIONARY/PREPAREDNESS ACTIONS... Consider traveling over Rabbit Ears Pass today while conditions are better, or taking alternate routes. If you must travel during the storm, bring an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ COZ033-041600- /O.CAN.KBOU.WW.Y.0005.000000T0000Z-210204T1600Z/ South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet- Including the cities of Laramie and Medicine Bow Mountains, Rabbit Ears Range, Cameron Pass, Rocky Mountain National Park, and Willow Creek Pass 758 AM MST Thu Feb 4 2021 ...WINTER WEATHER ADVISORY IS CANCELLED... Any snow today will be very light, though there will still be areas of blowing and drifting snow in exposed higher areas. Road conditions should generally improve during the day. $$ For more information from the National Weather Service, visit https://weather.gov/bou Gimmestad
695 WWUS45 KBOU 042139 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 239 PM MST Thu Feb 4 2021 COZ031-051200- /O.CON.KBOU.WS.W.0002.210205T0000Z-210206T1200Z/ West Jackson and West Grand Counties Above 9000 Feet- Including the cities of Mt Zirkel 239 PM MST Thu Feb 4 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST SATURDAY... * WHAT...Snow and wind will increase again tonight and continue through Friday night. The snow may be heavy at times on Friday and Friday night. Total new snow accumulations of 10 to 18 inches are expected by late Friday night, with even heavier amounts possible above timberline. Winds will gust up to 50 mph producing near blizzard conditions in blowing and drifting snow. * WHERE...Rabbit Ears Pass. * WHEN...Until 5 AM MST Saturday. * IMPACTS...Travel could be very difficult to impossible Friday afternoon and Friday night. Consider traveling before conditions deteriorate or taking another route. 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 can be obtained by calling 5 1 1 or visiting www.cotrip.org. && $$ COZ033-034-051200- /O.NEW.KBOU.WW.Y.0006.210204T2139Z-210206T1200Z/ South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet-South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet- Including the cities of East Slopes Mosquito Range, Indian Peaks, Eisenhower Tunnel, Rocky Mountain National Park, East Slopes Southern Gore Range, Mount Evans, Laramie and Medicine Bow Mountains, Cameron Pass, Breckenridge, Kenosha Mountains, Winter Park, Williams Fork Mountains, Willow Creek Pass, Rabbit Ears Range, and Berthoud Pass 239 PM MST Thu Feb 4 2021 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 5 AM MST SATURDAY... * WHAT...Winds gusting as high as 65 mph will produce extensive blowing and drifting snow with near blizzard conditions at times in exposed areas. Periods of light snowfall through Friday morning, then steadier snow Friday afternoon and evening. Additional snow through Friday night will be 4 to 10 inches in the higher mountains, with lighter amounts in the valleys. * WHERE...Rocky Mountain National Park and the Medicine Bow Range, and The Mountains of Summit County, the Mosquito Range, and the Indian Peaks. * WHEN...Until 5 AM MST Saturday. * IMPACTS...Travel could be very difficult, especially over Loveland and Berthoud Passes and along US 285 in South Park. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions can be obtained by calling 5 1 1 or visiting www.cotrip.org. && $$ For more information from the National Weather Service, visit https://weather.gov/bou Gimmestad/Direnzo
735 WWUS45 KBOU 051001 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 301 AM MST Fri Feb 5 2021 COZ031-051815- /O.CON.KBOU.WS.W.0002.000000T0000Z-210206T1200Z/ West Jackson and West Grand Counties Above 9000 Feet- Including the cities of Mt Zirkel 301 AM MST Fri Feb 5 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST SATURDAY... * WHAT...Snow and wind will increase today and continue through tonight. The snow may be heavy at times. Total new snow accumulations of 10 to 18 inches are expected by late tonight, with even heavier amounts possible above timberline. Winds will gust up to 50 mph producing near blizzard conditions in blowing and drifting snow. * WHERE...Rabbit Ears Pass. * WHEN...Until 5 AM MST Saturday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the morning and evening commutes. Visibilities may drop below 1/4 mile due to falling and blowing snow. 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 the state you are calling from can be obtained by calling 5 1 1. && $$ COZ033-034-051815- /O.CON.KBOU.WW.Y.0006.000000T0000Z-210206T1200Z/ South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet-South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet- Including the cities of East Slopes Mosquito Range, Indian Peaks, Eisenhower Tunnel, Rocky Mountain National Park, East Slopes Southern Gore Range, Mount Evans, Laramie and Medicine Bow Mountains, Cameron Pass, Breckenridge, Kenosha Mountains, Winter Park, Williams Fork Mountains, Willow Creek Pass, Rabbit Ears Range, and Berthoud Pass 301 AM MST Fri Feb 5 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST SATURDAY... * WHAT...Winds gusting as high as 65 mph will produce extensive blowing and drifting snow with near blizzard conditions at times in exposed areas. Periods of light snowfall this morning, then steadier snow this afternoon and evening. Additional snow through late tonight will be 4 to 10 inches in the higher mountains, with lighter amounts in the valleys. * WHERE...Rocky Mountain National Park and the Medicine Bow Range, and The Mountains of Summit County, the Mosquito Range, and the Indian Peaks. * WHEN...Until 5 AM MST Saturday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning and evening commutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ For more information from the National Weather Service, visit https://weather.gov/bou RPK
512 WWUS45 KBOU 051814 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 1114 AM MST Fri Feb 5 2021 COZ031-060400- /O.CON.KBOU.WS.W.0002.000000T0000Z-210206T1200Z/ West Jackson and West Grand Counties Above 9000 Feet- Including the cities of Mt Zirkel 1114 AM MST Fri Feb 5 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST SATURDAY... * WHAT...Snow and wind will increase today and continue through tonight. The snow may be heavy at times. Total new snow accumulations of 10 to 18 inches are expected by late tonight, with even heavier amounts possible above timberline. Winds will gust up to 50 mph producing near blizzard conditions in blowing and drifting snow. * WHERE...Rabbit Ears Pass. * WHEN...Until 5 AM MST Saturday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the Friday evening commute. Visibilities may drop below 1/4 mile due to falling and blowing snow. 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 can be obtained by calling 5 1 1 or visiting www.cotrip.org. && $$ COZ033-034-060400- /O.CON.KBOU.WW.Y.0006.000000T0000Z-210206T1200Z/ South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet-South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet- Including the cities of East Slopes Mosquito Range, Indian Peaks, Eisenhower Tunnel, Rocky Mountain National Park, East Slopes Southern Gore Range, Mount Evans, Laramie and Medicine Bow Mountains, Cameron Pass, Breckenridge, Kenosha Mountains, Winter Park, Williams Fork Mountains, Willow Creek Pass, Rabbit Ears Range, and Berthoud Pass 1114 AM MST Fri Feb 5 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST SATURDAY... * WHAT...Snow will increase this afternoon and evening. Additional snow accumulations of 4 to 10 inches at higher elevations, with lighter amounts in the valleys. Winds gusting as high as 55 mph will cause extensive blowing and drifting snow. * WHERE...Rocky Mountain National Park and the Medicine Bow Range, and The Mountains of Summit County, the Mosquito Range, and the Indian Peaks. * WHEN...Until 5 AM MST Saturday. * IMPACTS...Travel could be very difficult. Areas of blowing snow could significantly reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions can be obtained by calling 5 1 1 or visiting www.cotrip.org. && $$ For more information from the National Weather Service, visit https://weather.gov/bou Gimmestad
939 WWUS45 KBOU 060358 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 858 PM MST Fri Feb 5 2021 COZ031-061200- /O.CON.KBOU.WS.W.0002.000000T0000Z-210206T1200Z/ West Jackson and West Grand Counties Above 9000 Feet- Including the cities of Mt Zirkel 858 PM MST Fri Feb 5 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST SATURDAY... * WHAT...Snow will continue tonight. Additional snow accumulations of 1 to 5 inches are expected by 5 AM Saturday morning, with even heavier amounts possible above timberline. Winds will gust up to 50 mph producing near blizzard conditions in blowing and drifting snow. * WHERE...Rabbit Ears Pass. * WHEN...Until 5 AM MST Saturday. * IMPACTS...Plan on slippery road conditions. Areas of blowing snow could significantly reduce visibility. Gusty winds could bring down tree branches. Visibilities may drop below 1/4 mile due to falling and blowing snow. 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 the state you are calling from can be obtained by calling 5 1 1. Persons should consider delaying all travel. If travel is absolutely necessary, drive with extreme caution. Consider taking a winter storm kit along with you, including such items as tire chains, booster cables, flashlight, shovel, blankets and extra clothing. Also take water, a first aid kit, and anything else that would help you survive in case you become stranded. && $$ COZ033-034-061200- /O.CON.KBOU.WW.Y.0006.000000T0000Z-210206T1200Z/ South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet-South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet- Including the cities of East Slopes Mosquito Range, Indian Peaks, Eisenhower Tunnel, Rocky Mountain National Park, East Slopes Southern Gore Range, Mount Evans, Laramie and Medicine Bow Mountains, Cameron Pass, Breckenridge, Kenosha Mountains, Winter Park, Williams Fork Mountains, Willow Creek Pass, Rabbit Ears Range, and Berthoud Pass 858 PM MST Fri Feb 5 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST SATURDAY... * WHAT...Snow will continue overnight. Additional snow accumulations of 1 to 3 inches are expected through 5 AM Saturday morning, with lighter amounts in the valleys. Winds gusting as high as 55 mph will cause extensive blowing and drifting snow. * WHERE...Rocky Mountain National Park and the Medicine Bow Range, and The Mountains of Summit County, the Mosquito Range, and the Indian Peaks. * WHEN...Until 5 AM MST Saturday. * IMPACTS...Plan on slippery road conditions. Areas of blowing snow could significantly reduce visibility. Extensive damage to trees and power lines is possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ For more information from the National Weather Service, visit https://weather.gov/bou RJK
189 WWUS45 KBOU 061042 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 342 AM MST Sat Feb 6 2021 COZ031-061845- /O.NEW.KBOU.WW.Y.0007.210207T0000Z-210207T1200Z/ /O.CON.KBOU.WS.W.0002.000000T0000Z-210206T1200Z/ West Jackson and West Grand Counties Above 9000 Feet- Including the cities of Mt Zirkel 342 AM MST Sat Feb 6 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST EARLY THIS MORNING... ...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 AM MST SUNDAY... * WHAT...Snow will gradually decrease this morning. Additional snow accumulations of 1 to 3 inches may occur today. Winds will gust up to 40 mph producing blowing and drifting snow. Snow will then increase again this evening and continue overnight with additional accumulations of 5 to 10 inches. Winds will gust to 50 mph at times with near blizzard conditions in blowing snow. * WHERE...Rabbit Ears Pass. * WHEN...For the Winter Weather Advisory, from 5 PM this afternoon to 5 AM MST Sunday. For the Winter Storm Warning, until 5 AM MST early this morning. * IMPACTS...Travel could be very difficult. Areas of blowing snow could significantly reduce visibility. Visibilities may drop below 1/4 mile due to falling and blowing snow. 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 the state you are calling from can be obtained by calling 5 1 1. && $$ COZ033-061845- /O.NEW.KBOU.WW.Y.0007.210207T0000Z-210207T1200Z/ /O.CON.KBOU.WW.Y.0006.000000T0000Z-210206T1200Z/ South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet- Including the cities of Laramie and Medicine Bow Mountains, Rabbit Ears Range, Cameron Pass, Rocky Mountain National Park, and Willow Creek Pass 342 AM MST Sat Feb 6 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST EARLY THIS MORNING... ...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 AM MST SUNDAY... * WHAT...Snow will decrease morning. Additional snow accumulations of 1 to 3 inches are expected today. Winds gusting as high as 50 mph will cause blowing and drifting snow. Snow will then increase this evening and continue overnight. Additional accumulations of 4 to 8 inches will be possible. Winds gusting to 70 mph will produce near blizzard conditions in blowing snow. * WHERE...Rocky Mountain National Park and the Medicine Bow Range. * WHEN...For the first Winter Weather Advisory, from 5 PM this afternoon to 5 AM MST Sunday. For the second Winter Weather Advisory, until 5 AM MST early this morning. * IMPACTS...Plan on slippery road conditions. Widespread blowing snow could significantly reduce visibility with very difficult travel conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ COZ034-061200- /O.CON.KBOU.WW.Y.0006.000000T0000Z-210206T1200Z/ 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 Indian Peaks, Eisenhower Tunnel, East Slopes Southern Gore Range, Mount Evans, East Slopes Mosquito Range, Breckenridge, Winter Park, Williams Fork Mountains, Kenosha Mountains, and Berthoud Pass 342 AM MST Sat Feb 6 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST EARLY THIS MORNING... * WHAT...Snow will decrease this morning. Additional snow accumulations of 1 to 2 inches are expected today. Winds gusting as high as 50 mph will cause blowing and drifting snow over the higher mountain passes early this morning. * WHERE...The Mountains of Summit County, the Mosquito Range, and the Indian Peaks. * WHEN...Until 5 AM MST early this morning. * IMPACTS...Plan on slippery road conditions. Blowing snow could significantly reduce visibility early this morning. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ For more information from the National Weather Service, visit https://weather.gov/bou RPK
143 WWUS45 KBOU 061207 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 507 AM MST Sat Feb 6 2021 COZ031-062015- /O.EXP.KBOU.WS.W.0002.000000T0000Z-210206T1200Z/ /O.CON.KBOU.WW.Y.0007.210207T0000Z-210207T1200Z/ West Jackson and West Grand Counties Above 9000 Feet- Including the cities of Mt Zirkel 507 AM MST Sat Feb 6 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 AM MST SUNDAY... ...WINTER STORM WARNING HAS EXPIRED... * WHAT...Snow will gradually decrease this morning. Additional snow accumulations of 1 to 3 inches may occur today. Winds will gust up to 40 mph producing blowing and drifting snow. Snow will then increase again this evening and continue overnight with additional accumulations of 5 to 10 inches. Winds will gust to 50 mph at times with near blizzard conditions in blowing snow. * WHERE...Rabbit Ears Pass. * WHEN...From 5 PM this afternoon to 5 AM MST Sunday. * IMPACTS...Travel could be very difficult tonight. Areas of blowing snow could significantly reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ COZ033-062015- /O.EXP.KBOU.WW.Y.0006.000000T0000Z-210206T1200Z/ /O.CON.KBOU.WW.Y.0007.210207T0000Z-210207T1200Z/ South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet- Including the cities of Laramie and Medicine Bow Mountains, Rabbit Ears Range, Cameron Pass, Rocky Mountain National Park, and Willow Creek Pass 507 AM MST Sat Feb 6 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 AM MST SUNDAY... ...WINTER WEATHER ADVISORY HAS EXPIRED... * WHAT...Snow will decrease morning. Additional snow accumulations of 1 to 3 inches are expected today. Winds gusting as high as 50 mph will cause blowing and drifting snow. Snow will then increase this evening and continue overnight. Additional accumulations of 4 to 8 inches will be possible. Winds gusting to 70 mph will produce near blizzard conditions in blowing snow tonight. * WHERE...Rocky Mountain National Park and the Medicine Bow Range. * WHEN...From 5 PM this afternoon to 5 AM MST Sunday. * IMPACTS...Plan on slippery road conditions. Widespread blowing snow could significantly reduce visibility with difficult travel tonight. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ COZ034-061315- /O.EXP.KBOU.WW.Y.0006.000000T0000Z-210206T1200Z/ South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet- Including the cities of Indian Peaks, Eisenhower Tunnel, East Slopes Southern Gore Range, Mount Evans, East Slopes Mosquito Range, Breckenridge, Winter Park, Williams Fork Mountains, Kenosha Mountains, and Berthoud Pass 507 AM MST Sat Feb 6 2021 ...WINTER WEATHER ADVISORY HAS EXPIRED... Areas of light snow will continue today with an additional 1 to 2 inches possible. Wind gusts to 50 mph will produce areas of blowing snow over the higher passes. $$ For more information from the National Weather Service, visit https://weather.gov/bou RPK
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 3, 8:44 PM MST | Special Weather Statement | BOU | Arapahoe, Douglas, Elbert | 46 min |
| Feb 3, 9:38 PM MST | Special Weather Statement | BOU | Douglas, Elbert | 52 min |
| Feb 3, 10:39 PM MST | Special Weather Statement | BOU | Elbert | 36 min |
| Feb 4, 2:39 PM MST | Winter Weather Advisory | BOU | Boulder, Clear Creek, Gilpin, Grand, Jackson, Jefferson and 3 more | 38 hr |
Nearby
Winter Storm Warnings in Colorado, 2021Every winter storm warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.