Winter Storm Warning 4, NWS Denver/Boulder, CO

365 
WWUS45 KBOU 051723
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
1023 AM MST Thu Mar 5 2026

COZ033-034-060700-
/O.CON.KBOU.WS.W.0004.260306T0700Z-260307T0700Z/
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 Willow Creek Pass, Breckenridge, East Slopes
Southern Gore Range, Williams Fork Mountains, East Slopes Mosquito
Range, Rocky Mountain National Park, Eisenhower Tunnel, Indian Peaks,
Winter Park, Mount Blue Sky, Laramie and Medicine Bow Mountains,
Rabbit Ears Range, Kenosha Mountains, Berthoud Pass, and Cameron Pass
1023 AM MST Thu Mar 5 2026

...WINTER STORM WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO
MIDNIGHT MST FRIDAY NIGHT...

* WHAT...Heavy snow expected. Total snow accumulations between 6 and
  14 inches, with the heaviest snow expected from Rocky Mountain NP
  southward. Winds gusting as high as 40 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 midnight tonight to midnight MST Friday Night.

* IMPACTS...Travel could be very difficult. The hazardous conditions
  will impact the Friday morning and evening commutes.

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.

&&

$$

COZ041-060700-
/O.EXB.KBOU.WW.Y.0010.260306T1300Z-260307T0700Z/
Elbert/Central and East Douglas Counties Above 6000 Feet-
Including the cities of Fondis, Castle Rock, Larkspur, Kiowa, and
Elbert
1023 AM MST Thu Mar 5 2026

...WINTER WEATHER ADVISORY IN EFFECT FROM 6 AM FRIDAY TO MIDNIGHT MST
FRIDAY NIGHT...

* WHAT...Snow expected. Total snow accumulations between 3 and 8
  inches, with the heaviest snow south of Castle Rock. Winds gusting
  as high as 40 mph.

* WHERE...Castle Rock, Elizabeth, Larkspur.

* WHEN...From 6 AM Friday to midnight MST Friday Night.

* IMPACTS...Plan on slippery road conditions. The hazardous
  conditions will impact the Friday 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.

&&

$$

COZ030-032-037-060700-
/O.EXA.KBOU.WW.Y.0010.260306T0700Z-260307T0700Z/
Jackson County Below 9000 Feet-Grand and Summit Counties Below
9000 Feet-Central and Southeast Park County-
Including the cities of Dillon, Rand, Gould, North Park, Walden,
Spicer, Granby, Kremmling, Hartsel, Grand Lake, South Park, Fairplay,
Fraser, Lake George, and Hot Sulphur Springs
1023 AM MST Thu Mar 5 2026

...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO
MIDNIGHT MST FRIDAY NIGHT...

* WHAT...Snow expected. Total snow accumulations between 3 and 7
  inches.

* WHERE...North Park, Middle Park, and South Park.

* WHEN...From midnight tonight to midnight MST Friday Night.

* IMPACTS...Travel could be very difficult at times.

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.

&&

$$

COZ031-060700-
/O.CON.KBOU.WW.Y.0010.260306T0700Z-260307T0300Z/
West Jackson and West Grand Counties Above 9000 Feet-
Including the cities of Mt Zirkel
1023 AM MST Thu Mar 5 2026

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO
8 PM MST FRIDAY...

* WHAT...Snow expected. Total snow accumulations between 4 and 9
  inches.

* WHERE...Rabbit Ears Pass.

* WHEN...From midnight tonight to 8 PM MST Friday.

* 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.

&&

$$

COZ035-036-060700-
/O.CON.KBOU.WW.Y.0010.260306T0700Z-260307T0700Z/
Larimer and Boulder Counties Between 6000 and 9000 Feet-Jefferson
and West Douglas Counties Above 6000 Feet/Gilpin/Clear
Creek/Northeast Park Counties Below 9000 Feet-
Including the cities of Central City, Georgetown, Glendevey,
Evergreen, Estes Park, Nederland, Westcreek, Bailey, Idaho Springs,
and Red Feather Lakes
1023 AM MST Thu Mar 5 2026

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO
MIDNIGHT MST FRIDAY NIGHT...

* WHAT...Snow expected. Total snow accumulations between 3 and 9
  inches for the northern foothills, and 5 to 12 inches for the
  southern foothills.

* WHERE...The Northern Front Range Foothills, and The Southern Front
  Range Foothills.

* WHEN...From midnight tonight to midnight MST Friday Night.

* 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

BRQ

588 
WWUS45 KBOU 060750
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
1250 AM MST Fri Mar 6 2026

COZ036-061900-
/O.UPG.KBOU.WW.Y.0010.000000T0000Z-260307T0700Z/
/O.EXA.KBOU.WS.W.0004.000000T0000Z-260307T0700Z/
Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear
Creek/Northeast Park Counties Below 9000 Feet-
Including the cities of Georgetown, Idaho Springs, Westcreek,
Evergreen, Central City, and Bailey
1250 AM MST Fri Mar 6 2026

...WINTER STORM WARNING IN EFFECT UNTIL MIDNIGHT MST TONIGHT...

* WHAT...Heavy snow. Additional snow accumulations between 8 and 14
  inches.

* WHERE...The Southern Front Range Foothills.

* WHEN...Until midnight MST tonight.

* IMPACTS...Travel could be very difficult. Road closures are
  possible. The hazardous conditions will impact the Friday morning
  and evening commutes.

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.

&&

$$

COZ033-034-061900-
/O.CON.KBOU.WS.W.0004.000000T0000Z-260307T0700Z/
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 Cameron Pass, East Slopes Mosquito Range,
Rabbit Ears Range, Winter Park, Laramie and Medicine Bow Mountains,
Berthoud Pass, Breckenridge, Kenosha Mountains, East Slopes Southern
Gore Range, Willow Creek Pass, Williams Fork Mountains, Indian Peaks,
Eisenhower Tunnel, Rocky Mountain National Park, and Mount Blue Sky
1250 AM MST Fri Mar 6 2026

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MST
TONIGHT...

* WHAT...Heavy snow. Total snow accumulations between 6 and 14
  inches.

* 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 midnight MST tonight.

* IMPACTS...Travel could be very difficult. The hazardous conditions
  will impact the Friday morning and evening commutes.

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.

&&

$$

COZ039-040-045-061900-
/O.EXB.KBOU.WW.Y.0010.260306T1200Z-260307T0300Z/
Boulder And Jefferson Counties Below 6000 Feet/West Broomfield
County-North Douglas County Below 6000 Feet/Denver/West Adams and
Arapahoe Counties/East Broomfield County-Central and East Adams
and Arapahoe Counties-
Including the cities of Leader, Highlands Ranch, Littleton, Boulder,
Byers, Brighton, Bennett, Denver International Airport, Arvada,
Lakewood, City of Denver, Longmont, Deer Trail, Aurora, Parker, and
Golden
1250 AM MST Fri Mar 6 2026

...WINTER WEATHER ADVISORY IN EFFECT FROM 5 AM EARLY THIS MORNING TO
8 PM MST THIS EVENING...

* WHAT...Snow expected. Total snow accumulations between 3 and 5
  inches. Winds gusting as high as 35 mph east of I-25.

* WHERE...Boulder and the western suburbs of Denver, Denver, and
  Byers.

* WHEN...From 5 AM early this morning to 8 PM MST this evening.

* IMPACTS...Plan on slippery and slushy road conditions at times. The
  hazardous conditions will impact the Friday morning and Friday late
  evening commutes. There will be periods of just wet roads,
  especially in the afternoon.

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.

&&

$$

COZ030-032-037-061900-
/O.CON.KBOU.WW.Y.0010.000000T0000Z-260307T0700Z/
Jackson County Below 9000 Feet-Grand and Summit Counties Below
9000 Feet-Central and Southeast Park County-
Including the cities of Kremmling, Fairplay, Dillon, Hartsel, Grand
Lake, Walden, Hot Sulphur Springs, Granby, Fraser, Gould, Lake
George, Spicer, North Park, Rand, and South Park
1250 AM MST Fri Mar 6 2026

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

* WHAT...Snow. Additional snow accumulations between 3 and 7 inches.

* WHERE...North Park, Grand and Summit Counties Below 9000 Feet, and
  South Park.

* WHEN...Until midnight MST tonight.

* IMPACTS...Plan on slippery road conditions. The hazardous
  conditions will impact the Friday 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.

&&

$$

COZ031-061900-
/O.CON.KBOU.WW.Y.0010.000000T0000Z-260307T0300Z/
West Jackson and West Grand Counties Above 9000 Feet-
Including the cities of Mt Zirkel
1250 AM MST Fri Mar 6 2026

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 PM MST THIS
EVENING...

* WHAT...Snow expected. Total snow accumulations between 4 and 9
  inches.

* WHERE...Rabbit Ears Pass.

* WHEN...Until 8 PM MST this evening.

* IMPACTS...Plan on slippery road conditions.

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.

&&

$$

COZ035-061900-
/O.CON.KBOU.WW.Y.0010.000000T0000Z-260307T0700Z/
Larimer and Boulder Counties Between 6000 and 9000 Feet-
Including the cities of Glendevey, Estes Park, Nederland, and Red
Feather Lakes
1250 AM MST Fri Mar 6 2026

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

* WHAT...Snow expected. Total snow accumulations between 4 and 12
  inches, with the heaviest amounts in the foothills of Boulder
  County.

* WHERE...The Northern Front Range Foothills.

* WHEN...Until midnight MST tonight.

* IMPACTS...Travel could be very difficult. The hazardous conditions
  will impact the Friday 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.

&&

$$

COZ041-061900-
/O.CON.KBOU.WW.Y.0010.260306T1300Z-260307T0700Z/
Elbert/Central and East Douglas Counties Above 6000 Feet-
Including the cities of Fondis, Elbert, Castle Rock, Larkspur, and
Kiowa
1250 AM MST Fri Mar 6 2026

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 AM THIS MORNING
TO MIDNIGHT MST TONIGHT...

* WHAT...Snow and blowing snow expected. Total snow accumulations
  between 5 and 8 inches, with the heaviest snow south of Castle
  Rock. Winds gusting as high as 35 mph.

* WHERE...Castle Rock.

* WHEN...From 6 AM this morning to midnight MST tonight.

* IMPACTS...Travel could be very difficult. The hazardous conditions
  will impact the Friday 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.

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

&&

$$

For more information from the National Weather Service, visit
https://weather.gov/bou

20

888 
WWUS45 KBOU 061501
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
801 AM MST Fri Mar 6 2026

COZ035-062215-
/O.UPG.KBOU.WW.Y.0010.000000T0000Z-260307T0700Z/
/O.EXA.KBOU.WS.W.0004.000000T0000Z-260307T0700Z/
Larimer and Boulder Counties Between 6000 and 9000 Feet-
Including the cities of Glendevey, Estes Park, Red Feather Lakes, and
Nederland
801 AM MST Fri Mar 6 2026

...WINTER STORM WARNING IN EFFECT UNTIL MIDNIGHT MST TONIGHT...

* WHAT...Heavy snow. Additional snow accumulations between 3 and 9
  inches, with the heaviest additional snow expected across the
  Boulder County foothills, and lower amounts in Larimer County.
  Winds gusting as high as 35 mph.

* WHERE...The Northern Front Range Foothills.

* WHEN...Until midnight MST tonight.

* IMPACTS...Travel could be very difficult. The hazardous conditions
  will impact the Friday 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.

&&

$$

COZ033-034-062215-
/O.CON.KBOU.WS.W.0004.000000T0000Z-260307T0700Z/
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 Willow Creek Pass, East Slopes Southern Gore
Range, Laramie and Medicine Bow Mountains, Breckenridge, East Slopes
Mosquito Range, Kenosha Mountains, Williams Fork Mountains, Mount
Blue Sky, Eisenhower Tunnel, Winter Park, Indian Peaks, Cameron Pass,
Rocky Mountain National Park, Rabbit Ears Range, and Berthoud Pass
801 AM MST Fri Mar 6 2026

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MST
TONIGHT...

* WHAT...Heavy snow. Additional snow accumulations between 4 and 10
  inches, heaviest south of Rocky Mountain National Park.

* 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 midnight MST tonight.

* IMPACTS...Travel could be very difficult. The hazardous conditions
  will impact the Friday morning and evening commutes.

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.

&&

$$

COZ036-062215-
/O.CON.KBOU.WS.W.0004.000000T0000Z-260307T0700Z/
Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear
Creek/Northeast Park Counties Below 9000 Feet-
Including the cities of Georgetown, Evergreen, Central City, Bailey,
Westcreek, and Idaho Springs
801 AM MST Fri Mar 6 2026

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MST
TONIGHT...

* WHAT...Heavy snow. Additional snow accumulations between 5 and 10
  inches.

* WHERE...The Southern Front Range Foothills.

* WHEN...Until midnight MST tonight.

* IMPACTS...Travel could be very difficult. Road closures are
  possible. The hazardous conditions will impact the Friday morning
  and evening commutes.

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.

&&

$$

COZ030-032-037-062215-
/O.CON.KBOU.WW.Y.0010.000000T0000Z-260307T0700Z/
Jackson County Below 9000 Feet-Grand and Summit Counties Below
9000 Feet-Central and Southeast Park County-
Including the cities of Fairplay, Kremmling, North Park, Hot Sulphur
Springs, Grand Lake, Spicer, Gould, Walden, Dillon, Fraser, Hartsel,
Granby, Lake George, South Park, and Rand
801 AM MST Fri Mar 6 2026

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

* WHAT...Snow. Additional snow accumulations between 2 and 6 inches,
  with the heaviest additional snowfall in Park County.

* WHERE...North Park, Middle Park, and South Park.

* WHEN...Until midnight MST tonight.

* IMPACTS...Plan on slippery road conditions. The hazardous
  conditions will impact the Friday 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.

&&

$$

COZ031-062215-
/O.CON.KBOU.WW.Y.0010.000000T0000Z-260307T0300Z/
West Jackson and West Grand Counties Above 9000 Feet-
Including the cities of Mt Zirkel
801 AM MST Fri Mar 6 2026

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 PM MST THIS
EVENING...

* WHAT...Snow. Additional snow accumulations up to 2 inches are
  possible. Winds gusting as high as 35 mph.

* WHERE...Rabbit Ears Pass.

* WHEN...Until 8 PM MST this evening.

* IMPACTS...Plan on slippery road conditions.

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.

&&

$$

COZ039-040-045-062215-
/O.CON.KBOU.WW.Y.0010.000000T0000Z-260307T0300Z/
Boulder And Jefferson Counties Below 6000 Feet/West Broomfield
County-North Douglas County Below 6000 Feet/Denver/West Adams and
Arapahoe Counties/East Broomfield County-Central and East Adams
and Arapahoe Counties-
Including the cities of Golden, Boulder, Aurora, Parker, Byers,
Longmont, Brighton, Deer Trail, Highlands Ranch, Leader, Lakewood,
Littleton, City of Denver, Denver International Airport, Bennett, and
Arvada
801 AM MST Fri Mar 6 2026

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 PM MST THIS
EVENING...

* WHAT...Snow. Additional snow accumulations between 2 and 4 inches.
  Winds gusting as high as 35 mph.

* WHERE...Boulder and the western suburbs of Denver, Denver, and
  Byers.

* WHEN...Until 8 PM MST this evening.

* IMPACTS...Plan on slippery and slushy road conditions at times. The
  hazardous conditions will impact the Friday morning and Friday late
  evening commutes. There will be periods of just wet roads,
  especially in the afternoon.

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.

&&

$$

COZ041-062215-
/O.CON.KBOU.WW.Y.0010.000000T0000Z-260307T0700Z/
Elbert/Central and East Douglas Counties Above 6000 Feet-
Including the cities of Elbert, Fondis, Castle Rock, Kiowa, and
Larkspur
801 AM MST Fri Mar 6 2026

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

* WHAT...Snow. Additional snow accumulations between 2 and 7 inches.
  Winds gusting as high as 40 mph.

* WHERE...Castle Rock, Elizabeth, Larkspur.

* WHEN...Until midnight MST tonight.

* IMPACTS...Travel could be very difficult. The hazardous conditions
  will impact the Friday 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

BRQ

545 
WWUS45 KBOU 062005
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
105 PM MST Fri Mar 6 2026

COZ030-032-062115-
/O.CAN.KBOU.WW.Y.0010.000000T0000Z-260307T0700Z/
Jackson County Below 9000 Feet-Grand and Summit Counties Below
9000 Feet-
Including the cities of Kremmling, North Park, Hot Sulphur Springs,
Grand Lake, Spicer, Gould, Walden, Dillon, Fraser, Granby, and Rand
105 PM MST Fri Mar 6 2026

...WINTER WEATHER ADVISORY IS CANCELLED...

$$

COZ039-040-045-062115-
/O.CAN.KBOU.WW.Y.0010.000000T0000Z-260307T0300Z/
Boulder And Jefferson Counties Below 6000 Feet/West Broomfield
County-North Douglas County Below 6000 Feet/Denver/West Adams and
Arapahoe Counties/East Broomfield County-Central and East Adams
and Arapahoe Counties-
Including the cities of Golden, Boulder, Aurora, Parker, Byers,
Longmont, Brighton, Deer Trail, Highlands Ranch, Leader, Lakewood,
Littleton, City of Denver, Denver International Airport, Bennett, and
Arvada
105 PM MST Fri Mar 6 2026

...WINTER WEATHER ADVISORY IS CANCELLED...

Light to moderate snow will continue through this evening with a
general reduction in coverage and intensity over time. Accumulations
on roads are no longer expected, however freezing temperatures
tonight may result in icy road conditions through Saturday morning,
so drivers should continue to exercise caution on area roads as
temperatures fall this evening and overnight.

$$

COZ033-034-070700-
/O.CON.KBOU.WS.W.0004.000000T0000Z-260307T0700Z/
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 Willow Creek Pass, East Slopes Southern Gore
Range, Laramie and Medicine Bow Mountains, Breckenridge, East Slopes
Mosquito Range, Kenosha Mountains, Williams Fork Mountains, Mount
Blue Sky, Eisenhower Tunnel, Winter Park, Indian Peaks, Cameron Pass,
Rocky Mountain National Park, Rabbit Ears Range, and Berthoud Pass
105 PM MST Fri Mar 6 2026

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MST
TONIGHT...

* WHAT...Heavy snow. Additional snow accumulations between 1 and 4
  inches. Winds gusting as high as 40 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...Until midnight MST tonight.

* IMPACTS...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.

&&

$$

COZ035-070700-
/O.CON.KBOU.WS.W.0004.000000T0000Z-260307T0700Z/
Larimer and Boulder Counties Between 6000 and 9000 Feet-
Including the cities of Glendevey, Estes Park, Red Feather Lakes, and
Nederland
105 PM MST Fri Mar 6 2026

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MST
TONIGHT...

* WHAT...Snow. Additional snow accumulations up to 3 inches possible,
  mainly for the Boulder County foothills.

* WHERE...The Northern Front Range Foothills.

* WHEN...Until midnight MST tonight.

* IMPACTS...Plan on slippery road conditions.

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.

&&

$$

COZ036-070700-
/O.CON.KBOU.WS.W.0004.000000T0000Z-260307T0700Z/
Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear
Creek/Northeast Park Counties Below 9000 Feet-
Including the cities of Georgetown, Evergreen, Central City, Bailey,
Westcreek, and Idaho Springs
105 PM MST Fri Mar 6 2026

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MST
TONIGHT...

* WHAT...Snow. Additional snow accumulations 1 to 4 inches.

* WHERE...The Southern Front Range Foothills.

* WHEN...Until midnight MST tonight.

* IMPACTS...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.

&&

$$

COZ031-070300-
/O.CON.KBOU.WW.Y.0010.000000T0000Z-260307T0300Z/
West Jackson and West Grand Counties Above 9000 Feet-
Including the cities of Mt Zirkel
105 PM MST Fri Mar 6 2026

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 PM MST THIS
EVENING...

* WHAT...Snow. Additional snow accumulations up to 2 inches possible.

* WHERE...Rabbit Ears Pass.

* WHEN...Until 8 PM MST this evening.

* IMPACTS...Plan on slippery road conditions.

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.

&&

$$

COZ037-070700-
/O.CON.KBOU.WW.Y.0010.000000T0000Z-260307T0700Z/
Central and Southeast Park County-
Including the cities of Fairplay, Hartsel, Lake George, and South
Park
105 PM MST Fri Mar 6 2026

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

* WHAT...Snow. Additional snow accumulations of 1 to 4 inches
  expected.

* WHERE...South Park.

* WHEN...Until midnight MST tonight.

* 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.

&&

$$

COZ041-070700-
/O.CON.KBOU.WW.Y.0010.000000T0000Z-260307T0700Z/
Elbert/Central and East Douglas Counties Above 6000 Feet-
Including the cities of Elbert, Fondis, Castle Rock, Kiowa, and
Larkspur
105 PM MST Fri Mar 6 2026

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

* WHAT...Snow. Additional snow accumulations of 1 to 3 inches
  expected.

* WHERE...Castle Rock, Elizabeth, Larkspur.

* WHEN...Until midnight MST tonight.

* IMPACTS...Plan on slippery road conditions. The hazardous
  conditions will impact the Friday 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.

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

&&

$$

For more information from the National Weather Service, visit
https://weather.gov/bou

BRQ

896 
WWUS45 KBOU 070352
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
852 PM MST Fri Mar 6 2026

COZ033>036-070500-
/O.CAN.KBOU.WS.W.0004.000000T0000Z-260307T0700Z/
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-Larimer
and Boulder Counties Between 6000 and 9000 Feet-Jefferson and
West Douglas Counties Above 6000 Feet/Gilpin/Clear
Creek/Northeast Park Counties Below 9000 Feet-
Including the cities of Georgetown, Bailey, Berthoud Pass, Mount Blue
Sky, Willow Creek Pass, Nederland, Eisenhower Tunnel, Laramie and
Medicine Bow Mountains, Cameron Pass, Breckenridge, Williams Fork
Mountains, East Slopes Mosquito Range, Evergreen, Westcreek, Central
City, Idaho Springs, Glendevey, Rocky Mountain National Park, East
Slopes Southern Gore Range, Kenosha Mountains, Indian Peaks, Rabbit
Ears Range, Estes Park, Winter Park, and Red Feather Lakes
852 PM MST Fri Mar 6 2026

...WINTER STORM WARNING IS CANCELLED...

The threat has ended.

$$

COZ037-070700-
/O.CON.KBOU.WW.Y.0010.000000T0000Z-260307T0700Z/
Central and Southeast Park County-
Including the cities of Hartsel, Fairplay, Lake George, and South
Park
852 PM MST Fri Mar 6 2026

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

* WHAT...Snow. Additional snow accumulations up to one inch.

* WHERE...South Park.

* WHEN...Until midnight MST tonight.

* IMPACTS...Plan on slippery road conditions.

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.

&&

$$

COZ041-070700-
/O.CON.KBOU.WW.Y.0010.000000T0000Z-260307T0700Z/
Elbert/Central and East Douglas Counties Above 6000 Feet-
Including the cities of Larkspur, Castle Rock, Elbert, Kiowa, and
Fondis
852 PM MST Fri Mar 6 2026

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

* WHAT...Snow. Additional snow accumulations up to one inch. Winds
  gusting as high as 35 mph.

* WHERE...Castle Rock.

* WHEN...Until midnight MST tonight.

* IMPACTS...Plan on slippery road conditions.

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

Area Forecast Discussion
National Weather Service Denver/Boulder CO
1103 PM MST Wed Mar 4 2026

.KEY MESSAGES...

- Warm Thursday, with critical fire weather conditions across the
  Palmer Divide and Lincoln County in the afternoon.

- Moderate to locally heavy snow is expected to impact the
  mountains and foothills Thursday night through Friday.

- A few inches of snow increasingly likely for most of the lower
  elevations, favoring minor impacts. Continued uncertainty makes
  the forecast especially dynamic, and potential for locally
  moderate travel impacts does exist for portions of the I-25
  corridor and plains.

- Warmer and drier Saturday through Monday. Cooler and windier
  conditions favored as early as Tuesday, with some potential for
  the return of snow to the region.

&&

.DISCUSSION /Through Wednesday/...
Issued at 1246 PM MST Wed Mar 4 2026

Warm advection ahead of an approaching and shearing trough will
lead to a warm and dry day across the region Thursday as
temperatures rebound into the upper 60's in the plains. Efficient
mixing will allow for development of breezy winds roughly along
and south of I-70 in the afternoon, producing critical fire
weather conditions around the Palmer Divide. More information in
the Fire Weather discussion below.

Eyes then turn to our incoming winter storm Thursday night into
Friday, which is poised to bring our first widespread snow in
quite some time (Denver's most recent measurable snow occurred
January 25th). Unfortunately, the onslaught of guidance over the
past 24 hours has shed limited additional light on the finer
details of the forecast.

Snowfall is set to develop in the high country late Thursday
evening and increase overnight, although the heaviest snow will
hold off until after daybreak. Meanwhile, a well-defined cold
front will descend into the plains late Thursday evening, kicking
off our I-25 corridor shower potential shortly after midnight.
Although a brief rain or rain/snow mix is conceivable on the front
end, the changeover to snow should occur quickly if that's the
case, with increasing confidence in precipitation remaining as
snow throughout the day for the urban corridor and most of the
plains. Abundant QG lift will be in place through Friday
afternoon, and will be accompanied by strong low and mid-level
frontogenesis, which would support potential for some banded snow
as well as snow squalls (for both the mountains and plains) under
moderately steep lapse rates and given healthy low-level winds.
Surface flow will be largely northerly however, substantially
limiting the upslope component along the base of the
foothills/urban corridor in particular, with exception of the
Palmer Divide. The foothills themselves may fair slightly better,
with some cross-sections favoring a shallow corridor of more
easterly flow aloft. Road temperatures further compound the
accumulation uncertainty for the lower elevations, as it may be
difficult to keep them near freezing outside of any heavier bands
with enhanced snowfall rates, particularly in the morning.

Synthesizing the above in terms of potential impacts, there's
enough information to indicate we'll see quite difficult travel
across the mountains and foothills in particular throughout the
day on Friday, where a broad axis of 4-12" accumulations is
expected and winter weather highlights have been issued. Such
impacts are likely to be present for parts of the plains/urban
corridor as well, but should be more localized and transient. The
Palmer Divide looks slightly better positioned for more impactful
accumulations exceeding 3-5", but model consistency and thus
confidence is just not there yet to move forward with any
headlines. Nonetheless, at least 1-2" of snow accumulation looks
quite reasonable (~70% chance) for a majority of the urban
corridor through Friday evening. Drier subsident flow will fill in
relatively quickly overnight, tapering off all snow by daybreak
Saturday.

Quieter weather is in store for the weekend and into Monday, with
a gradual transition to more zonal flow and a steady warming
trend, culminating in a potential return to highs in the 70's come
Monday. Some change is then expected as early as Tuesday or
Wednesday with ensembles favoring an amplifying trough to our
north. How far south it's able to dig will determine the type and
extent of impacts. At the very least, some cooler and windier
weather appears to be on the horizon for the middle of next week.
Precipitation potential is more questionable.

&&

.AVIATION /06Z TAFS through 06Z Friday/...
Issued at 1049 PM MST Wed Mar 4 2026

VFR conditions expected through Thursday evening. Drainage winds
will have more of a due southerly direction tonight. Light winds
in the morning will give way to stronger winds in the afternoon on
Thursday. The wind direction will be challenging to forecast. A
DCVZ will setup over the city of Denver. This will likely create
gusty southerly winds for DEN and APA while northeast winds occur
at BJC. However, there is a 30% chance that winds at DEN never end
up turning to the south. The DCVZ has a chance to develop south
of DEN and create northeast winds there during the afternoon.
Winds will likely turn to the northeast at DEN during the early
evening hours. A strong cold front will move through the terminals
around 02-04Z Thursday evening. This front could have winds up to
40 knots behind it. Ceilings will decrease and around 09-12Z on
Friday, precipitation, likely in the form of snow, will develop
across the terminals. This snow could be intense, especially after
12Z, with visibility down to a quarter mile for a short time and
ceilings below 500 feet.

&&

.FIRE WEATHER...
Issued at 1246 PM MST Wed Mar 4 2026

South to southwest winds will increase on Thursday in advance of
the incoming storm system. Downslope flow off the Palmer Divide
will result in warm and dry conditions, with humidity falling into
the 10-15% range. Mixing heights should be quite elevated, and
help promote efficient mixing of winds aloft down to the surface.
The stronger flow aloft, however, likely won't arrive until later
in the afternoon, thereby shortening the window of critical
conditions slightly (mainly mid and late afternoon), when gusts
25-30 mph will be most likely. Tuesday's wetting rains were rather
localized and not widespread across the warned zones, so fuels
were deemed susceptible and the Fire Weather Watch was
consequently upgraded to a Red Flag Warning for the areas of
strongest winds (Palmer Divide into Lincoln County).

&&

.BOU WATCHES/WARNINGS/ADVISORIES...
Winter Weather Advisory from midnight Thursday night to 8 PM MST
Friday for COZ031.

Winter Storm Watch from late Thursday night through Friday
evening for COZ033-034.

Winter Weather Advisory from midnight Thursday night to midnight
MST Friday night for COZ035-036.

Red Flag Warning from noon to 6 PM MST Thursday for COZ241-246-
247.

&&

DISCUSSION...BRQ
AVIATION...Danielson
FIRE WEATHER...BRQ

Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
450 AM MST Wed Mar 4 2026

COZ030>051-051200-
Jackson County Below 9000 Feet-
West Jackson and West Grand Counties Above 9000 Feet-
Grand and Summit Counties Below 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-Larimer and Boulder Counties Between 6000 and 9000 Feet-
Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear
Creek/Northeast Park Counties Below 9000 Feet-
Central and Southeast Park County-
Larimer County Below 6000 Feet/Northwest Weld County-
Boulder And Jefferson Counties Below 6000 Feet/West Broomfield
County-
North Douglas County Below 6000 Feet/Denver/West Adams and
Arapahoe Counties/East Broomfield County-
Elbert/Central and East Douglas Counties Above 6000 Feet-
Northeast Weld County-Central and South Weld County-Morgan County-
Central and East Adams and Arapahoe Counties-
North and Northeast Elbert County Below 6000 Feet/North Lincoln
County-
Southeast Elbert County Below 6000 Feet/South Lincoln County-
Logan County-Washington County-Sedgwick County-Phillips County-
450 AM MST Wed Mar 4 2026

This hazardous weather outlook is for northeast and north central
Colorado.

.DAY ONE...Today and Tonight

No hazardous weather expected.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Critical fire weather conditions are expected across the plains
on Thursday due to mild, dry, and breezy conditions. A strong low
pressure system will produce moderate to heavy snow in the
mountains late Thursday and Friday. Rain will mix over to snow
across lower elevations late Thursday night into Friday. Some
accumulating snow will be possible across the plains. Travel
impacts are expected in the mountains Thursday evening through
Friday evening. The Friday morning commute may be impacted due to
the snow across lower elevations.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed, but reports of snow and
wind gusts will be appreciated.