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Winter Weather Advisory 0020
Issued by the Denver / Boulder Forecast Office

Action Issued Starts Expiration
New 2026-11-01 12:40:19 2026-11-02 04:00:00 2026-11-03 01:00:00
New 2026-11-01 12:40:19 2026-11-02 06:00:00 2026-11-03 01:00:00
Continued 2026-11-01 23:46:09 2026-11-02 06:00:00 2026-11-03 01:00:00
Continued 2026-11-01 23:46:09 2026-11-02 04:00:00 2026-11-03 01:00:00
Continued 2026-11-02 15:20:28 2026-11-03 01:00:00
Continued 2026-11-02 15:20:28 2026-11-03 01:00:00


Action: New
Issued At: 2026-11-01 12:40:19

512 
WWUS45 KBOU 011839
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
1139 AM MST Sun Nov 1 2026

COZ031-033-021200-
/O.NEW.KBOU.WW.Y.0020.261102T1000Z-261103T0700Z/
West Jackson and West Grand Counties Above 9000 Feet-South and
East Jackson/Larimer/North and Northeast Grand/Northwest Boulder
Counties Above 9000 Feet-
Including the cities of Mt Zirkel, Rocky Mountain National Park,
Laramie and Medicine Bow Mountains, Cameron Pass, Willow Creek Pass,
and Rabbit Ears Range
1139 AM MST Sun Nov 1 2026

...WINTER WEATHER ADVISORY IN EFFECT FROM 3 AM MONDAY TO MIDNIGHT MST
MONDAY NIGHT...

* WHAT...Snow expected. Total snow accumulations 4 to 10 inches.

* WHERE...Rabbit Ears Pass, and Rocky Mountain National Park and the
  Medicine Bow Range.

* WHEN...From 3 AM Monday to midnight MST Monday Night.

* IMPACTS...Roads will become slippery in spots, especially through
  mountain passes. Use caution when traveling.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Roads will be slick resulting in slow and hazardous travel. Allow
extra time to reach your destination.

&&

$$

COZ034-021200-
/O.NEW.KBOU.WW.Y.0020.261102T1200Z-261103T0700Z/
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 Williams Fork Mountains, Indian Peaks, Mount
Blue Sky, Eisenhower Tunnel, Winter Park, East Slopes Mosquito Range,
East Slopes Southern Gore Range, Berthoud Pass, Breckenridge, and
Kenosha Mountains
1139 AM MST Sun Nov 1 2026

...WINTER WEATHER ADVISORY IN EFFECT FROM 5 AM MONDAY TO MIDNIGHT MST
MONDAY NIGHT...

* WHAT...Snow expected. Total snow accumulations 3 to 7 inches.

* WHERE...The Mountains of Summit County, the Mosquito Range, and the
  Indian Peaks.

* WHEN...From 5 AM Monday to midnight MST Monday Night.

* IMPACTS...Plan on slippery road conditions. The hazardous
  conditions will impact the Monday morning and evening commutes.

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

Meier


Action: New
Issued At: 2026-11-01 12:40:19

512 
WWUS45 KBOU 011839
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
1139 AM MST Sun Nov 1 2026

COZ031-033-021200-
/O.NEW.KBOU.WW.Y.0020.261102T1000Z-261103T0700Z/
West Jackson and West Grand Counties Above 9000 Feet-South and
East Jackson/Larimer/North and Northeast Grand/Northwest Boulder
Counties Above 9000 Feet-
Including the cities of Mt Zirkel, Rocky Mountain National Park,
Laramie and Medicine Bow Mountains, Cameron Pass, Willow Creek Pass,
and Rabbit Ears Range
1139 AM MST Sun Nov 1 2026

...WINTER WEATHER ADVISORY IN EFFECT FROM 3 AM MONDAY TO MIDNIGHT MST
MONDAY NIGHT...

* WHAT...Snow expected. Total snow accumulations 4 to 10 inches.

* WHERE...Rabbit Ears Pass, and Rocky Mountain National Park and the
  Medicine Bow Range.

* WHEN...From 3 AM Monday to midnight MST Monday Night.

* IMPACTS...Roads will become slippery in spots, especially through
  mountain passes. Use caution when traveling.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Roads will be slick resulting in slow and hazardous travel. Allow
extra time to reach your destination.

&&

$$

COZ034-021200-
/O.NEW.KBOU.WW.Y.0020.261102T1200Z-261103T0700Z/
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 Williams Fork Mountains, Indian Peaks, Mount
Blue Sky, Eisenhower Tunnel, Winter Park, East Slopes Mosquito Range,
East Slopes Southern Gore Range, Berthoud Pass, Breckenridge, and
Kenosha Mountains
1139 AM MST Sun Nov 1 2026

...WINTER WEATHER ADVISORY IN EFFECT FROM 5 AM MONDAY TO MIDNIGHT MST
MONDAY NIGHT...

* WHAT...Snow expected. Total snow accumulations 3 to 7 inches.

* WHERE...The Mountains of Summit County, the Mosquito Range, and the
  Indian Peaks.

* WHEN...From 5 AM Monday to midnight MST Monday Night.

* IMPACTS...Plan on slippery road conditions. The hazardous
  conditions will impact the Monday morning and evening commutes.

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

Meier


Action: Continued
Issued At: 2026-11-01 23:46:09

762 
WWUS45 KBOU 020545
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
1045 PM MST Sun Nov 1 2026

COZ031-033-022200-
/O.CON.KBOU.WW.Y.0020.261102T1000Z-261103T0700Z/
West Jackson and West Grand Counties Above 9000 Feet-South and
East Jackson/Larimer/North and Northeast Grand/Northwest Boulder
Counties Above 9000 Feet-
Including the cities of Willow Creek Pass, Rocky Mountain National
Park, Mt Zirkel, Cameron Pass, Rabbit Ears Range, and Laramie and
Medicine Bow Mountains
1045 PM MST Sun Nov 1 2026

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 3 AM MONDAY TO
MIDNIGHT MST MONDAY NIGHT...

* WHAT...Snow expected. Total snow accumulations of 4 to 9 inches
  with localized higher amounts possible.

* WHERE...Rabbit Ears Pass, and Rocky Mountain National Park and the
  Medicine Bow Range.

* WHEN...From 3 AM Monday to midnight MST Monday Night.

* IMPACTS...Roads will become slippery in spots, especially through
  mountain passes. The hazardous conditions will impact the Monday
  morning and evening commutes. Use caution when traveling.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Roads will be slick resulting in slow and hazardous travel. Allow
extra time to reach your destination.

&&

$$

COZ034-022200-
/O.CON.KBOU.WW.Y.0020.261102T1200Z-261103T0700Z/
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, Winter Park, Kenosha
Mountains, East Slopes Southern Gore Range, Mount Blue Sky, Indian
Peaks, Eisenhower Tunnel, East Slopes Mosquito Range, Williams Fork
Mountains, and Breckenridge
1045 PM MST Sun Nov 1 2026

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 AM MONDAY TO
MIDNIGHT MST MONDAY NIGHT...

* WHAT...Snow expected. Total snow accumulations of 3 to 7 inches.

* WHERE...The Mountains of Summit County, the Mosquito Range, and the
  Indian Peaks.

* WHEN...From 5 AM Monday to midnight MST Monday Night.

* IMPACTS...Plan on slippery road conditions. The hazardous
  conditions will impact the Monday morning and evening commutes.

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

MV


Action: Continued
Issued At: 2026-11-01 23:46:09

762 
WWUS45 KBOU 020545
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
1045 PM MST Sun Nov 1 2026

COZ031-033-022200-
/O.CON.KBOU.WW.Y.0020.261102T1000Z-261103T0700Z/
West Jackson and West Grand Counties Above 9000 Feet-South and
East Jackson/Larimer/North and Northeast Grand/Northwest Boulder
Counties Above 9000 Feet-
Including the cities of Willow Creek Pass, Rocky Mountain National
Park, Mt Zirkel, Cameron Pass, Rabbit Ears Range, and Laramie and
Medicine Bow Mountains
1045 PM MST Sun Nov 1 2026

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 3 AM MONDAY TO
MIDNIGHT MST MONDAY NIGHT...

* WHAT...Snow expected. Total snow accumulations of 4 to 9 inches
  with localized higher amounts possible.

* WHERE...Rabbit Ears Pass, and Rocky Mountain National Park and the
  Medicine Bow Range.

* WHEN...From 3 AM Monday to midnight MST Monday Night.

* IMPACTS...Roads will become slippery in spots, especially through
  mountain passes. The hazardous conditions will impact the Monday
  morning and evening commutes. Use caution when traveling.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Roads will be slick resulting in slow and hazardous travel. Allow
extra time to reach your destination.

&&

$$

COZ034-022200-
/O.CON.KBOU.WW.Y.0020.261102T1200Z-261103T0700Z/
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, Winter Park, Kenosha
Mountains, East Slopes Southern Gore Range, Mount Blue Sky, Indian
Peaks, Eisenhower Tunnel, East Slopes Mosquito Range, Williams Fork
Mountains, and Breckenridge
1045 PM MST Sun Nov 1 2026

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 AM MONDAY TO
MIDNIGHT MST MONDAY NIGHT...

* WHAT...Snow expected. Total snow accumulations of 3 to 7 inches.

* WHERE...The Mountains of Summit County, the Mosquito Range, and the
  Indian Peaks.

* WHEN...From 5 AM Monday to midnight MST Monday Night.

* IMPACTS...Plan on slippery road conditions. The hazardous
  conditions will impact the Monday morning and evening commutes.

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

MV


Action: Continued
Issued At: 2026-11-02 15:20:28

068 
WWUS45 KBOU 022120
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
220 PM MST Mon Nov 2 2026

COZ031-033-030630-
/O.CON.KBOU.WW.Y.0020.000000T0000Z-261103T0700Z/
West Jackson and West Grand Counties Above 9000 Feet-South and
East Jackson/Larimer/North and Northeast Grand/Northwest Boulder
Counties Above 9000 Feet-
Including the cities of Willow Creek Pass, Cameron Pass, Laramie and
Medicine Bow Mountains, Mt Zirkel, Rabbit Ears Range, and Rocky
Mountain National Park
220 PM MST Mon Nov 2 2026

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MST
TONIGHT...

* WHAT...Snow expected. Total snow accumulations of 2 to 6 inches
  with localized higher amounts possible.

* WHERE...Rabbit Ears Pass, and Rocky Mountain National Park and the
  Medicine Bow Range.

* WHEN...Until midnight MST tonight.

* IMPACTS...Roads will become slippery in spots, especially through
  mountain passes. Use caution when traveling.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Roads will be slick resulting in slow and hazardous travel. Allow
extra time to reach your destination.

&&

$$

COZ034-030630-
/O.CON.KBOU.WW.Y.0020.000000T0000Z-261103T0700Z/
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 Williams Fork Mountains, Indian Peaks, Mount
Blue Sky, Kenosha Mountains, East Slopes Mosquito Range,
Breckenridge, East Slopes Southern Gore Range, Berthoud Pass,
Eisenhower Tunnel, and Winter Park
220 PM MST Mon Nov 2 2026

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MST
TONIGHT...

* WHAT...Snow expected. Total snow accumulations of 2 to 6 inches
  with localized higher amounts.

* WHERE...The Mountains of Summit County, the Mosquito Range, and the
  Indian Peaks.

* WHEN...Until midnight MST tonight.

* IMPACTS...Plan on slippery road conditions. The hazardous
  conditions will impact the Monday evening commute.

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

MAI


Action: Continued
Issued At: 2026-11-02 15:20:28

068 
WWUS45 KBOU 022120
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
220 PM MST Mon Nov 2 2026

COZ031-033-030630-
/O.CON.KBOU.WW.Y.0020.000000T0000Z-261103T0700Z/
West Jackson and West Grand Counties Above 9000 Feet-South and
East Jackson/Larimer/North and Northeast Grand/Northwest Boulder
Counties Above 9000 Feet-
Including the cities of Willow Creek Pass, Cameron Pass, Laramie and
Medicine Bow Mountains, Mt Zirkel, Rabbit Ears Range, and Rocky
Mountain National Park
220 PM MST Mon Nov 2 2026

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MST
TONIGHT...

* WHAT...Snow expected. Total snow accumulations of 2 to 6 inches
  with localized higher amounts possible.

* WHERE...Rabbit Ears Pass, and Rocky Mountain National Park and the
  Medicine Bow Range.

* WHEN...Until midnight MST tonight.

* IMPACTS...Roads will become slippery in spots, especially through
  mountain passes. Use caution when traveling.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Roads will be slick resulting in slow and hazardous travel. Allow
extra time to reach your destination.

&&

$$

COZ034-030630-
/O.CON.KBOU.WW.Y.0020.000000T0000Z-261103T0700Z/
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 Williams Fork Mountains, Indian Peaks, Mount
Blue Sky, Kenosha Mountains, East Slopes Mosquito Range,
Breckenridge, East Slopes Southern Gore Range, Berthoud Pass,
Eisenhower Tunnel, and Winter Park
220 PM MST Mon Nov 2 2026

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MST
TONIGHT...

* WHAT...Snow expected. Total snow accumulations of 2 to 6 inches
  with localized higher amounts.

* WHERE...The Mountains of Summit County, the Mosquito Range, and the
  Indian Peaks.

* WHEN...Until midnight MST tonight.

* IMPACTS...Plan on slippery road conditions. The hazardous
  conditions will impact the Monday evening commute.

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

MAI



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