Alert archive / Colorado / Winter Storm Warnings in 2023

Winter Storm Warning 13, NWS Denver/Boulder, CO

October 27, 202315 counties in Colorado

NWS Denver/Boulder, CO issued this winter storm warning at Oct 27, 2023, 1:53 AM MDT for 15 counties in Colorado. It took effect at Oct 28, 2023, 12:00 AM MDT. It was in force for 36 hr. 60 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
Oct 27, 2023, 1:53 AM MDT (07:53 UTC)
In effect from
Oct 28, 2023, 12:00 AM MDT
Expired
Oct 29, 2023, 12:00 PM MDT
In force
36 hr
Issued by
NWS Denver/Boulder, CO

Counties Adams County, CO, Arapahoe County, CO, Boulder County, CO, Broomfield County, CO, Clear Creek County, CO, Denver County, CO, Douglas County, CO, Elbert County, CO, Gilpin County, CO, Grand County, CO, Jackson County, CO, Jefferson County, CO, Larimer County, CO, Park County, CO, Summit County, CO

The radar

The Denver radar (KFTG), 63 km from the middle of the area, began a volume at 07:56 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

TimeReportWhereRemark
Oct 28, 12:00 PM MDTSNOW 1.32 Se Denver Intl Airpor, CO
Oct 28, 1:37 PM MDTSNOW 3.8Dillon, CO
Oct 28, 1:39 PM MDTSNOW 1.5Georgetown, CO
Oct 28, 3:00 PM MDTSNOW 3.14 Ne Fort Collins, CO
Oct 28, 3:56 PM MDTSNOW 3.52 Nw Strasburg, CO
Oct 28, 5:05 PM MDTSNOW 21 E Edgewater, CO
Oct 28, 5:10 PM MDTSNOW 2.51 Se Littleton, CO
Oct 28, 5:23 PM MDTSNOW 43 Ne Englewood, CO
Oct 28, 5:26 PM MDTSNOW 14 Ne Nederland, CO
Oct 28, 6:00 PM MDTSNOW 2.9Denver Intl Airport, CO
Oct 28, 6:12 PM MDTSNOW 4.52.8 Ene Castle Pines, CO
Oct 28, 6:30 PM MDTSNOW 4.64 S Bennett, CO
Oct 28, 6:51 PM MDTSNOW 6.55 Se Parker, CO
Oct 28, 7:27 PM MDTSNOW 43 Ne Cherry Creek Reser, CO
Oct 28, 8:00 PM MDTSNOW 71 N Castle Rock, CO
Oct 28, 8:29 PM MDTSNOW 83 S Castle Pines, CO
Oct 28, 8:30 PM MDTSNOW 42 Wnw Elkdale, CO
Oct 28, 8:32 PM MDTSNOW 815 E Castle Rock, CO
Oct 28, 8:57 PM MDTSNOW 5.52 Se Breckenridge, CO
Oct 28, 9:15 PM MDTSNOW 22 N Longmont, CO
Oct 28, 9:15 PM MDTSNOW 6.8Elizabeth, CO
Oct 28, 9:17 PM MDTSNOW 5.52 Nw Strasburg, CO
Oct 28, 9:47 PM MDTSNOW 3.5Arvada, CO
Oct 28, 9:51 PM MDTSNOW 51 Se Littleton, CO
Oct 28, 9:52 PM MDTSNOW 7.51 Nw Ponderosa Park, CO
Oct 28, 9:57 PM MDTSNOW 5Golden, CO
Oct 28, 9:58 PM MDTSNOW 6.43 Nne Cherry Creek Rese, CO
Oct 28, 10:00 PM MDTSNOW 52 Sse Denver, CO
Oct 28, 10:02 PM MDTSNOW 82 S Parker, CO
Oct 29, 12:00 AM MDTSNOW 4.52 Se Denver Intl Airpor, CO
Oct 29, 12:00 AM MDTSNOW 83 W Sheridan, CO
Oct 29, 12:30 AM MDTSNOW 3.41 E Superior, CO
Oct 29, 3:04 AM MDTSNOW 3.21 Nnw Louisville, CO
Oct 29, 3:21 AM MDTSNOW 63 Ne Englewood, CO
Oct 29, 4:12 AM MDTSNOW 4.52 Nnw Marshall, CO
Oct 29, 5:00 AM MDTSNOW 4.94 N Floyd Hill, COCocorahs station CO-GL-34 Floyd Hill 3.7 N.
Oct 29, 5:00 AM MDTSNOW 6.34 Wnw Arvada, COCocorahs station CO-JF-457 Arvada 3.5 WNW.
Oct 29, 5:05 AM MDTSNOW 63 W Fort Collins, COCocorahs station CO-LR-1009 Fort Collins 2.8 W.
Oct 29, 5:14 AM MDTSNOW 4.12 Ne Thornton, CO
Oct 29, 6:00 AM MDTSNOW 4.21 W Brighton, COCocorahs station CO-AD-204 Brighton 1.9 NNW.
Oct 29, 6:00 AM MDTSNOW 6.11 Wsw Aurora, COCocorahs station CO-AR-270 Aurora 0.7 WSW.
Oct 29, 6:00 AM MDTSNOW 6.51 Sse Denver Intl Airpo, COCorrects previous snow report from 1 SSE Denver Intl Airport. Updated 6 AM MDT.
Oct 29, 6:00 AM MDTSNOW 6.52 Ne Cherry Hills Villa, COCocorahs station CO-DN-329 1 NE Cherry Hills Village.
Oct 29, 6:00 AM MDTSNOW 6.52 Se Denver Intl Airpor, COUpdated 6 AM MDT.
Oct 29, 6:00 AM MDTSNOW 6.54 Wsw Arvada, COCocorahs station CO-JF-504 Arvada 3.6 WSW.
Oct 29, 6:00 AM MDTSNOW 83 Ssw Evergreen, COCocorahs station CO-JF-565 Evergreen 2.5 SSW.
Oct 29, 6:10 AM MDTSNOW 6.32 Sw Lakewood, COCocorahs station CO-JF-333 Lakewood 1.7 SW.
Oct 29, 6:10 AM MDTSNOW 8.53 N Cherry Creek Reserv, CO.
Oct 29, 6:10 AM MDTSNOW 8.53 N Cherry Creek Reserv, CO
Oct 29, 6:20 AM MDTSNOW 7Littleton, COCocorahs station CO-AR-386 Littleton 0.1 ESE.
Oct 29, 6:22 AM MDTSNOW 9.55 Ne Ponderosa Park, CO
Oct 29, 6:27 AM MDTSNOW 5.52 Ssw Boulder, CO
Oct 29, 6:30 AM MDTSNOW 2.81 Wnw Crescent Village, COCO-OP Observer station GRRC2 1.2 W Crescent Village.
Oct 29, 6:30 AM MDTSNOW 8.71 N Englewood, COCocorahs station CO-AR-292 Englewood 1.4 N.
Oct 29, 6:30 AM MDTSNOW 111 Sw Tiny Town, COCocorahs station CO-JF-537 Morrison 5.4 SSW.
Oct 29, 6:37 AM MDTSNOW 8Georgetown, CO.
Oct 29, 6:37 AM MDTSNOW 8Georgetown, CO
Oct 29, 6:38 AM MDTSNOW 32 N Longmont, CO.
Oct 29, 6:38 AM MDTSNOW 32 N Longmont, CO
Oct 29, 6:40 AM MDTSNOW 4.24 Sse Pinecliffe, COCocorahs station CO-JF-331 Golden 12.5 NW.

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, 7.9 hours before the alert went out and 287 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.

Skew-T log-pSkew-T log-p diagram, Grand Junction, CO at 00:00Z on 2023-10-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Grand Junction, CO at 00:00Z on 2023-10-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -13 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
0 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
-13 m²/s²
0-3 km storm-relative helicity
20 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

514 
WWUS45 KBOU 270753
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
153 AM MDT Fri Oct 27 2023

COZ031-033-034-272000-
/O.UPG.KBOU.WS.A.0009.231028T0000Z-231029T1800Z/
/O.NEW.KBOU.WS.W.0013.231028T0600Z-231029T1800Z/
West Jackson and West Grand Counties Above 9000 Feet-South and
East Jackson/Larimer/North and Northeast Grand/Northwest Boulder
Counties Above 9000 Feet-South and Southeast Grand/West Central
and Southwest Boulder/Gilpin/Clear Creek/Summit/North and West
Park Counties Above 9000 Feet-
Including the cities of Rabbit Ears Range, Eisenhower Tunnel,
Willow Creek Pass, Indian Peaks, Mount Blue Sky, Winter Park,
Breckenridge, Williams Fork Mountains, Rocky Mountain National
Park, Laramie and Medicine Bow Mountains, Mt Zirkel, Cameron
Pass, Berthoud Pass, East Slopes Mosquito Range, Kenosha
Mountains, and East Slopes Southern Gore Range
153 AM MDT Fri Oct 27 2023

...WINTER STORM WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO NOON MDT 
SUNDAY...

* WHAT...Heavy snow expected. Total snow accumulations between 8 and 
  24 inches. Winds gusting as high as 35 mph.

* WHERE...Rabbit Ears Pass, Rocky Mountain National Park and the 
  Medicine Bow Range, and The Mountains of Summit County, the 
  Mosquito Range, and the Indian Peaks.

* WHEN...From midnight tonight to noon MDT Sunday.

* 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.

Chain and traction laws will possibly be enacted for the mountains. 
If traveling to the mountains, be prepared for winter driving 
conditions.

Monitor the latest forecasts for updates on this situation.

&&

$$

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

Cooper
9 follow-up statements
290 
WWUS45 KBOU 272022
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
222 PM MDT Fri Oct 27 2023

COZ031-033-034-281200-
/O.CON.KBOU.WS.W.0013.231028T0600Z-231029T1800Z/
West Jackson and West Grand Counties Above 9000 Feet-South and
East Jackson/Larimer/North and Northeast Grand/Northwest Boulder
Counties Above 9000 Feet-South and Southeast Grand/West Central
and Southwest Boulder/Gilpin/Clear Creek/Summit/North and West
Park Counties Above 9000 Feet-
Including the cities of Cameron Pass, Berthoud Pass, Mount Blue
Sky, Williams Fork Mountains, Mt Zirkel, Laramie and Medicine Bow
Mountains, Breckenridge, East Slopes Southern Gore Range, Rabbit
Ears Range, Kenosha Mountains, Eisenhower Tunnel, East Slopes
Mosquito Range, Winter Park, Indian Peaks, Willow Creek Pass, and
Rocky Mountain National Park
222 PM MDT Fri Oct 27 2023

...WINTER STORM WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 
NOON MDT SUNDAY...

* WHAT...Heavy snow expected. Total snow accumulations between 8 and 
  24 inches. Winds gusting as high as 35 mph.

* WHERE...Rabbit Ears Pass, Rocky Mountain National Park and the 
  Medicine Bow Range, and The Mountains of Summit County, the 
  Mosquito Range, and the Indian Peaks.

* WHEN...From midnight tonight to noon MDT Sunday.

* 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.

Chain and traction laws will possibly be enacted for the mountains. 
If traveling to the mountains, be prepared for winter driving 
conditions.

Monitor the latest forecasts for updates on this situation.

&&

$$

COZ030-032-037-281200-
/O.NEW.KBOU.WW.Y.0033.231028T0600Z-231029T1800Z/
Jackson County Below 9000 Feet-Grand and Summit Counties Below
9000 Feet-Central and Southeast Park County-
Including the cities of Hartsel, South Park, Spicer, Granby,
Walden, Fraser, Gould, Fairplay, Dillon, Grand Lake, Hot Sulphur
Springs, Kremmling, Lake George, Rand, and North Park
222 PM MDT Fri Oct 27 2023

...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO NOON 
MDT SUNDAY...

* WHAT...Snow expected. Total snow accumulations between 3 and 8 
  inches. Winds gusting as high as 35 mph.

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

* WHEN...From midnight tonight to noon MDT Sunday.

* IMPACTS...Roads will likely become slick and hazardous. 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.

Chain and traction laws will possibly be enacted for the mountains. 
If traveling to the mountains, be prepared for winter driving 
conditions.

Monitor the latest forecasts for updates on this situation.

&&

$$

COZ038-041>046-048>051-281200-
/O.NEW.KBOU.WW.Y.0033.231028T1200Z-231029T1800Z/
Larimer County Below 6000 Feet/Northwest Weld 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-Logan County-
Washington County-Sedgwick County-Phillips County-
Including the cities of Castle Rock, Greeley, Briggsdale,
Bennett, Roggen, Agate, Kiowa, Merino, Hugo, Ovid, Akron, Nunn,
Leader, Matheson, Fondis, Holyoke, Larkspur, Last Chance,
Sedgwick, Amherst, Haxtun, Fort Collins, Loveland, Crook, Deer
Trail, Elbert, Grover, Sterling, Stoneham, Raymer, Otis, Peetz,
Hereford, Goodrich, Fort Lupton, Cope, Byers, Eaton, Pawnee
Buttes, Julesburg, Brush, Wiggins, Limon, and Fort Morgan
222 PM MDT Fri Oct 27 2023

...WINTER WEATHER ADVISORY IN EFFECT FROM 6 AM SATURDAY TO NOON MDT 
SUNDAY...

* WHAT...Snow expected. Total snow accumulations between 2 and 6 
  inches.

* WHERE...Portions of east central, north central, and northeast 
  Colorado.

* WHEN...From 6 AM Saturday to noon MDT Sunday.

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

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

Monitor the latest forecasts for updates on this situation.

&&

$$

COZ035-036-039-040-281200-
/O.NEW.KBOU.WS.A.0010.231028T1200Z-231029T1800Z/
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-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-
Including the cities of Idaho Springs, Evergreen, Glendevey,
Central City, Longmont, Estes Park, Bailey, Golden, Parker, City
of Denver, Westcreek, Georgetown, Lakewood, Highlands Ranch,
Aurora, Littleton, Boulder, Denver International Airport, Arvada,
Nederland, Brighton, and Red Feather Lakes
222 PM MDT Fri Oct 27 2023

...WINTER STORM WATCH IN EFFECT FROM SATURDAY MORNING THROUGH SUNDAY 
MORNING...

* WHAT...Heavy snow possible. Total snow accumulations between 4 and 
  10 inches possible, with locally higher totals.

* WHERE...The Northern Front Range Foothills, The Southern Front 
  Range Foothills, Boulder and the western suburbs of Denver, and 
  Denver.

* WHEN...From Saturday morning through Sunday morning.

* IMPACTS...Snow covered roads will make travel hazardous. Travel 
  could be very difficult, especially Saturday night.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation.

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

Hiris
894 
WWUS45 KBOU 280245
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
845 PM MDT Fri Oct 27 2023

COZ035-036-039-040-281200-
/O.UPG.KBOU.WS.A.0010.231028T1200Z-231029T1800Z/
/O.EXB.KBOU.WS.W.0013.231028T1200Z-231029T1800Z/
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-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-
Including the cities of Glendevey, Aurora, Denver International
Airport, Littleton, Brighton, Boulder, Evergreen, Estes Park,
Arvada, Westcreek, Central City, City of Denver, Parker, Bailey,
Golden, Longmont, Lakewood, Idaho Springs, Red Feather Lakes,
Highlands Ranch, Georgetown, and Nederland
845 PM MDT Fri Oct 27 2023

...WINTER STORM WARNING IN EFFECT FROM 6 AM SATURDAY TO NOON MDT 
SUNDAY...

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

* WHERE...The Northern Front Range Foothills, The Southern Front 
  Range Foothills, Boulder and the western suburbs of Denver, and 
  Denver.

* WHEN...From 6 AM Saturday to noon MDT Sunday. The heaviest snow 
  will be Saturday afternoon through Saturday night.

* IMPACTS...Snow covered roads will make travel hazardous and 
  driving may become very difficult due to heavy snow, especially 
  Saturday night.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Persons should consider delaying travel during the heaviest snow 
late Saturday and Saturday night. If travel is 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.

The latest road conditions for Colorado can be obtained by calling 5 
1 1 or by going to www.cotrip.org.

&&

$$

COZ031-033-034-281200-
/O.CON.KBOU.WS.W.0013.231028T0600Z-231029T1800Z/
West Jackson and West Grand Counties Above 9000 Feet-South and
East Jackson/Larimer/North and Northeast Grand/Northwest Boulder
Counties Above 9000 Feet-South and Southeast Grand/West Central
and Southwest Boulder/Gilpin/Clear Creek/Summit/North and West
Park Counties Above 9000 Feet-
Including the cities of Willow Creek Pass, East Slopes Mosquito
Range, East Slopes Southern Gore Range, Rocky Mountain National
Park, Cameron Pass, Eisenhower Tunnel, Laramie and Medicine Bow
Mountains, Rabbit Ears Range, Kenosha Mountains, Mount Blue Sky,
Winter Park, Mt Zirkel, Indian Peaks, Williams Fork Mountains,
Berthoud Pass, and Breckenridge
845 PM MDT Fri Oct 27 2023

...WINTER STORM WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 
NOON MDT SUNDAY...

* WHAT...Heavy snow expected. Total snow accumulations between 8 and 
  24 inches. Winds gusting as high as 35 mph.

* WHERE...Rabbit Ears Pass, Rocky Mountain National Park and the 
  Medicine Bow Range, and The Mountains of Summit County, the 
  Mosquito Range, and the Indian Peaks.

* WHEN...From midnight tonight to noon MDT Sunday.

* IMPACTS...Travel could be very difficult to impossible, especially 
  Saturday afternoon and Saturday night.

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.

Chain and traction laws will possibly be enacted for the mountains. 
If traveling to the mountains, be prepared for winter driving 
conditions.

&&

$$

COZ030-032-037-281200-
/O.CON.KBOU.WW.Y.0033.231028T0600Z-231029T1800Z/
Jackson County Below 9000 Feet-Grand and Summit Counties Below
9000 Feet-Central and Southeast Park County-
Including the cities of Granby, South Park, North Park,
Kremmling, Fairplay, Walden, Hartsel, Fraser, Spicer, Hot Sulphur
Springs, Grand Lake, Dillon, Lake George, Gould, and Rand
845 PM MDT Fri Oct 27 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT 
TO NOON MDT SUNDAY...

* WHAT...Snow expected. Total snow accumulations between 3 and 8 
  inches. Winds gusting as high as 35 mph.

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

* WHEN...From midnight tonight to noon MDT Sunday.

* IMPACTS...Roads will likely become slick and hazardous. Travel 
  could be very difficult, especially Saturday afternoon and 
  Saturday night.

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.

&&

$$

COZ038-041>046-048>051-281200-
/O.CON.KBOU.WW.Y.0033.231028T1200Z-231029T1800Z/
Larimer County Below 6000 Feet/Northwest Weld 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-Logan County-
Washington County-Sedgwick County-Phillips County-
Including the cities of Castle Rock, Ovid, Fondis, Hugo, Grover,
Elbert, Greeley, Akron, Cope, Fort Morgan, Leader, Brush, Crook,
Matheson, Merino, Briggsdale, Loveland, Raymer, Bennett, Agate,
Larkspur, Roggen, Otis, Sedgwick, Amherst, Julesburg, Fort
Lupton, Byers, Deer Trail, Pawnee Buttes, Peetz, Kiowa, Nunn,
Eaton, Wiggins, Sterling, Holyoke, Goodrich, Hereford, Fort
Collins, Last Chance, Haxtun, Limon, and Stoneham
845 PM MDT Fri Oct 27 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 AM SATURDAY TO 
NOON MDT SUNDAY...

* WHAT...Snow expected. Total snow accumulations between 4 and 6 
  inches.

* WHERE...Fort Collins, Greeley, Limon, and northeastern Colorado.

* WHEN...From 6 AM Saturday to noon MDT Sunday.

* IMPACTS...Roads will likely become slick and hazardous. Travel 
  could be very difficult, especially Saturday night.

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

Gimmestad
424 
WWUS45 KBOU 280932
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
332 AM MDT Sat Oct 28 2023

COZ031-033-034-282215-
/O.CON.KBOU.WS.W.0013.000000T0000Z-231029T1800Z/
West Jackson and West Grand Counties Above 9000 Feet-South and
East Jackson/Larimer/North and Northeast Grand/Northwest Boulder
Counties Above 9000 Feet-South and Southeast Grand/West Central
and Southwest Boulder/Gilpin/Clear Creek/Summit/North and West
Park Counties Above 9000 Feet-
Including the cities of Mt Zirkel, Rocky Mountain National Park,
Kenosha Mountains, Berthoud Pass, Eisenhower Tunnel, Williams
Fork Mountains, Winter Park, East Slopes Southern Gore Range,
Indian Peaks, Mount Blue Sky, Rabbit Ears Range, Willow Creek
Pass, Laramie and Medicine Bow Mountains, Breckenridge, Cameron
Pass, and East Slopes Mosquito Range
332 AM MDT Sat Oct 28 2023

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT SUNDAY...

* WHAT...Additional snow accumulations between 4 and 18 inches. 
  Highest amounts in and near the Interstate 70 corridor. Winds 
  gusting as high as 35 mph.

* WHERE...Rabbit Ears Pass, Rocky Mountain National Park and the 
  Medicine Bow Range, and The Mountains of Summit County, the 
  Mosquito Range, and the Indian Peaks.

* WHEN...Until noon MDT Sunday.

* 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.

Chain and traction laws will possibly be enacted for the mountains. 
If traveling to the mountains, be prepared for winter driving 
conditions.

&&

$$

COZ035-036-039-040-282215-
/O.CON.KBOU.WS.W.0013.231028T1200Z-231029T1800Z/
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-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-
Including the cities of Lakewood, Idaho Springs, Golden,
Westcreek, Brighton, Red Feather Lakes, Georgetown, City of
Denver, Denver International Airport, Longmont, Glendevey,
Central City, Littleton, Boulder, Bailey, Estes Park, Highlands
Ranch, Parker, Aurora, Nederland, Arvada, and Evergreen
332 AM MDT Sat Oct 28 2023

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT SUNDAY...

* WHAT...Heavy snow expected, especially later this afternoon and 
  tonight. Total snow accumulations between 6 and 14 inches.

* WHERE...The Northern Front Range Foothills, The Southern Front 
  Range Foothills, Boulder and the western suburbs of Denver, and 
  Denver.

* WHEN...Until noon MDT Sunday.

* IMPACTS...Snow covered roads will make travel hazardous and 
  driving may become very difficult due to heavy snow, especially 
  Saturday night.

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.

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.

&&

$$

COZ030-032-037-282215-
/O.CON.KBOU.WW.Y.0033.000000T0000Z-231029T1800Z/
Jackson County Below 9000 Feet-Grand and Summit Counties Below
9000 Feet-Central and Southeast Park County-
Including the cities of Grand Lake, Hot Sulphur Springs, Walden,
Dillon, Spicer, Granby, Hartsel, North Park, Rand, Kremmling,
Gould, Lake George, Fraser, Fairplay, and South Park
332 AM MDT Sat Oct 28 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT SUNDAY...

* WHAT...Snow. Additional snow accumulations between 2 and 8 inches. 
  Winds gusting as high as 35 mph.

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

* WHEN...Until noon MDT Sunday.

* IMPACTS...Roads will likely become slick and hazardous. 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.

&&

$$

COZ038-041>046-048>051-282215-
/O.CON.KBOU.WW.Y.0033.231028T1200Z-231029T1800Z/
Larimer County Below 6000 Feet/Northwest Weld 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-Logan County-
Washington County-Sedgwick County-Phillips County-
Including the cities of Kiowa, Grover, Ovid, Nunn, Last Chance,
Elbert, Byers, Briggsdale, Haxtun, Matheson, Bennett, Stoneham,
Agate, Hereford, Julesburg, Fort Collins, Cope, Raymer, Sedgwick,
Larkspur, Eaton, Pawnee Buttes, Crook, Peetz, Fort Lupton,
Goodrich, Brush, Limon, Loveland, Sterling, Wiggins, Leader,
Hugo, Greeley, Fort Morgan, Roggen, Fondis, Deer Trail, Merino,
Akron, Amherst, Castle Rock, Holyoke, and Otis
332 AM MDT Sat Oct 28 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT SUNDAY...

* WHAT...Snow becoming widespread tonight. Total snow accumulations 
  between 2 and 7 inches.

* WHERE...Portions of east central, north central, and northeast 
  Colorado.

* WHEN...Until noon MDT Sunday.

* IMPACTS...Roads will likely become slick and hazardous. 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

Entrekin
124 
WWUS45 KBOU 282107
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
307 PM MDT Sat Oct 28 2023

COZ031-033-034-291215-
/O.CON.KBOU.WS.W.0013.000000T0000Z-231029T1800Z/
West Jackson and West Grand Counties Above 9000 Feet-South and
East Jackson/Larimer/North and Northeast Grand/Northwest Boulder
Counties Above 9000 Feet-South and Southeast Grand/West Central
and Southwest Boulder/Gilpin/Clear Creek/Summit/North and West
Park Counties Above 9000 Feet-
Including the cities of East Slopes Mosquito Range, Laramie and
Medicine Bow Mountains, Berthoud Pass, Winter Park, Mt Zirkel,
Eisenhower Tunnel, Willow Creek Pass, Rocky Mountain National
Park, Indian Peaks, Williams Fork Mountains, Rabbit Ears Range,
Breckenridge, East Slopes Southern Gore Range, Mount Blue Sky,
Kenosha Mountains, and Cameron Pass
307 PM MDT Sat Oct 28 2023

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT SUNDAY...

* WHAT...Heavy snow. Additional snow accumulations between 4 and 10 
  inches, with the heaviest snow falling across the I-70 mountains.

* WHERE...Rabbit Ears Pass, Rocky Mountain National Park and the 
  Medicine Bow Range, and The Mountains of Summit County, the 
  Mosquito Range, and the Indian Peaks.

* WHEN...Until noon MDT Sunday.

* IMPACTS...Snow covered roads will make travel hazardous. 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.

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.

Chain and traction laws will possibly be enacted for the mountains. 
If traveling to the mountains, be prepared for winter driving 
conditions.

&&

$$

COZ035-036-039-040-291215-
/O.CON.KBOU.WS.W.0013.000000T0000Z-231029T1800Z/
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-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-
Including the cities of Arvada, City of Denver, Glendevey,
Parker, Nederland, Georgetown, Highlands Ranch, Brighton, Red
Feather Lakes, Aurora, Littleton, Evergreen, Boulder, Bailey,
Westcreek, Central City, Longmont, Golden, Estes Park, Lakewood,
Denver International Airport, and Idaho Springs
307 PM MDT Sat Oct 28 2023

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT SUNDAY...

* WHAT...Heavy snow. Additional snow accumulations between 4 and 10 
  inches.

* WHERE...The Northern Front Range Foothills, The Southern Front 
  Range Foothills, Boulder and the western suburbs of Denver, and 
  Denver.

* WHEN...Until noon MDT Sunday.

* IMPACTS...Travel may become very difficult due to heavy snowfall 
  on roadways.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Persons should consider delaying travel during the heaviest snow 
late Saturday and Saturday night. If travel is 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.

The latest road conditions for Colorado can be obtained by calling 5 
1 1 or by going to www.cotrip.org.

&&

$$

COZ030-032-037-291215-
/O.CON.KBOU.WW.Y.0033.000000T0000Z-231029T1800Z/
Jackson County Below 9000 Feet-Grand and Summit Counties Below
9000 Feet-Central and Southeast Park County-
Including the cities of Granby, South Park, Dillon, Fairplay,
Gould, Spicer, Grand Lake, Hot Sulphur Springs, Kremmling,
Walden, Lake George, Rand, Hartsel, Fraser, and North Park
307 PM MDT Sat Oct 28 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT SUNDAY...

* WHAT...Snow. Additional snow accumulations between 2 and 6 inches.

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

* WHEN...Until noon MDT Sunday.

* IMPACTS...Roads will likely become slick and hazardous. 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.

&&

$$

COZ038-041>046-048>051-291215-
/O.CON.KBOU.WW.Y.0033.000000T0000Z-231029T1800Z/
Larimer County Below 6000 Feet/Northwest Weld 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-Logan County-
Washington County-Sedgwick County-Phillips County-
Including the cities of Larkspur, Merino, Fondis, Sterling,
Elbert, Amherst, Greeley, Roggen, Limon, Peetz, Eaton, Last
Chance, Agate, Crook, Byers, Kiowa, Matheson, Otis, Loveland,
Ovid, Fort Collins, Brush, Leader, Sedgwick, Deer Trail,
Hereford, Fort Lupton, Raymer, Pawnee Buttes, Cope, Grover,
Briggsdale, Haxtun, Akron, Hugo, Julesburg, Goodrich, Stoneham,
Castle Rock, Nunn, Holyoke, Bennett, Fort Morgan, and Wiggins
307 PM MDT Sat Oct 28 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT SUNDAY...

* WHAT...Snow. Additional snow accumulations between 2 and 5 inches.

* WHERE...Fort Collins, Greeley, Limon, and northeastern Colorado.

* WHEN...Until noon MDT Sunday.

* IMPACTS...Roads will likely become slick and hazardous, especially 
  on bridges and overpasses. Use caution when traveling.

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
007 
WWUS45 KBOU 290111
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
711 PM MDT Sat Oct 28 2023

...HEAVIER SNOW MOVING INTO THE FOOTHILLS AND I-25 CORRIDOR THIS 
EVENING...

.The heaviest snow associated with the current weather system will 
spread across the foothills and Interstate 25 corridor this evening, 
and will spread across the plains east and southeast of Denver 
overnight.  Periods of heavy snow with snowfall rates over an inch 
per hour can be expected in the foothills and from Boulder and 
Denver south to Monument Hill this evening. This will cause roads to 
become slushy or icy at times in these areas, especially in the 
foothills west and southwest of Denver. Travelers should allow extra 
time and drive carefully this evening, or consider delaying 
unnecessary travel.

The snow will decrease later tonight, though light snow will 
continue into Sunday morning and roads may still be slippery in some 
areas.

COZ041-291100-
/O.UPG.KBOU.WW.Y.0033.000000T0000Z-231029T1800Z/
/O.EXA.KBOU.WS.W.0013.000000T0000Z-231029T1800Z/
Elbert/Central and East Douglas Counties Above 6000 Feet-
Including the cities of Castle Rock, Larkspur, Fondis, Elbert,
and Kiowa
711 PM MDT Sat Oct 28 2023

...WINTER STORM WARNING IN EFFECT UNTIL NOON MDT SUNDAY...

* WHAT...Heavy snow. Additional snow accumulations tonight and 
  Sunday morning between 3 and 6 inches.

* WHERE...Castle Rock.

* WHEN...The heaviest snow will be overnight, though light snow will 
  continue Sunday morning.

* IMPACTS...Snow covered roads will make travel hazardous. Travel 
  may become very difficult to impossible due to heavy snowfall on 
  roadways.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Persons should consider delaying all travel. If travel is 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. The latest road conditions for Colorado can be 
obtained by calling 5 1 1 or by going to www.cotrip.org.

&&

$$

COZ031-033-034-291100-
/O.CON.KBOU.WS.W.0013.000000T0000Z-231029T1800Z/
West Jackson and West Grand Counties Above 9000 Feet-South and
East Jackson/Larimer/North and Northeast Grand/Northwest Boulder
Counties Above 9000 Feet-South and Southeast Grand/West Central
and Southwest Boulder/Gilpin/Clear Creek/Summit/North and West
Park Counties Above 9000 Feet-
Including the cities of Breckenridge, Willow Creek Pass, East
Slopes Mosquito Range, Berthoud Pass, Indian Peaks, Mount Blue
Sky, Rocky Mountain National Park, Cameron Pass, Eisenhower
Tunnel, Laramie and Medicine Bow Mountains, East Slopes Southern
Gore Range, Kenosha Mountains, Williams Fork Mountains, Winter
Park, Mt Zirkel, and Rabbit Ears Range
711 PM MDT Sat Oct 28 2023

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT SUNDAY...

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

* WHERE...Rabbit Ears Pass, Rocky Mountain National Park and the 
  Medicine Bow Range, and The Mountains of Summit County, the 
  Mosquito Range, and the Indian Peaks.

* WHEN...The heaviest snow will be overnight tonight, with lighter 
  snow diminishing during the day Sunday.

* IMPACTS...Snow covered roads will make travel hazardous. Travel 
  could be very difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

Chain and traction laws will possibly be enacted for the mountains. 
The latest road conditions for Colorado can be obtained by calling 5 
1 1 or by going to www.cotrip.org.

&&

$$

COZ035-036-039-040-291100-
/O.CON.KBOU.WS.W.0013.000000T0000Z-231029T1800Z/
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-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-
Including the cities of Boulder, Golden, Lakewood, Denver
International Airport, Highlands Ranch, Georgetown, Idaho
Springs, Longmont, Aurora, Arvada, Westcreek, Red Feather Lakes,
Estes Park, Littleton, Nederland, Brighton, Glendevey, Parker,
Bailey, Central City, Evergreen, and City of Denver
711 PM MDT Sat Oct 28 2023

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT SUNDAY...

* WHAT...Heavy snow. Additional snow accumulations between 4 and 8 
  inches.

* WHERE...The Northern Front Range Foothills, The Southern Front 
  Range Foothills, Boulder and the western suburbs of Denver, and 
  Denver.

* WHEN...The heaviest snow will be from Boulder county south across 
  the Denver metro area and Jefferson and Douglas counties this 
  evening, and into the early morning hours south and west of 
  Denver. Lighter snow will diminish Sunday morning.

* IMPACTS...Snow covered roads will make travel hazardous. Travel 
  may become very difficult due to heavy snowfall on roadways.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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. The latest road conditions 
for Colorado can be obtained by calling 5 1 1 or by going to 
www.cotrip.org.

&&

$$

COZ030-032-037-291100-
/O.CON.KBOU.WW.Y.0033.000000T0000Z-231029T1800Z/
Jackson County Below 9000 Feet-Grand and Summit Counties Below
9000 Feet-Central and Southeast Park County-
Including the cities of Gould, Fraser, South Park, Granby, Rand,
Grand Lake, Fairplay, Spicer, North Park, Lake George, Hot
Sulphur Springs, Walden, Hartsel, Dillon, and Kremmling
711 PM MDT Sat Oct 28 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT SUNDAY...

* WHAT...Snow. Additional snow accumulations between 2 and 5 inches.

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

* WHEN...Until noon MDT Sunday.

* IMPACTS...Roads will likely become slick and hazardous.

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.

&&

$$

COZ038-042>046-048>051-291100-
/O.CON.KBOU.WW.Y.0033.000000T0000Z-231029T1800Z/
Larimer County Below 6000 Feet/Northwest Weld County-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-Logan County-
Washington County-Sedgwick County-Phillips County-
Including the cities of Peetz, Akron, Goodrich, Brush, Sterling,
Cope, Wiggins, Nunn, Byers, Fort Collins, Agate, Amherst, Last
Chance, Greeley, Stoneham, Hereford, Ovid, Sedgwick, Bennett,
Crook, Hugo, Otis, Haxtun, Holyoke, Deer Trail, Merino,
Briggsdale, Matheson, Eaton, Raymer, Loveland, Grover, Limon,
Pawnee Buttes, Leader, Fort Lupton, Fort Morgan, Julesburg, and
Roggen
711 PM MDT Sat Oct 28 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT SUNDAY...

* WHAT...Snow. Additional snow accumulations between 2 and 4 inches.

* WHERE...Fort Collins, Greeley, Limon and northeastern Colorado.

* WHEN...Until noon MDT Sunday.

* IMPACTS...Roads will likely become slick and hazardous.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Gimmestad
394 
WWUS45 KBOU 290831
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
231 AM MDT Sun Oct 29 2023

COZ031-290945-
/O.CAN.KBOU.WS.W.0013.000000T0000Z-231029T1800Z/
West Jackson and West Grand Counties Above 9000 Feet-
Including the cities of Mt Zirkel
231 AM MDT Sun Oct 29 2023

...WINTER STORM WARNING IS CANCELLED...

Snow has mostly ended. 

$$

COZ030-290945-
/O.CAN.KBOU.WW.Y.0033.000000T0000Z-231029T1800Z/
Jackson County Below 9000 Feet-
Including the cities of Walden, Spicer, Rand, North Park, and
Gould
231 AM MDT Sun Oct 29 2023

...WINTER WEATHER ADVISORY IS CANCELLED...

Snow has mostly ended.

$$

COZ033-034-291800-
/O.CON.KBOU.WS.W.0013.000000T0000Z-231029T1800Z/
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, Williams Fork
Mountains, Berthoud Pass, Indian Peaks, Mount Blue Sky, Cameron
Pass, Eisenhower Tunnel, East Slopes Mosquito Range, Rocky
Mountain National Park, Winter Park, Laramie and Medicine Bow
Mountains, Breckenridge, Kenosha Mountains, Rabbit Ears Range,
and East Slopes Southern Gore Range
231 AM MDT Sun Oct 29 2023

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT TODAY...

* WHAT...Additional snow accumulations between 1 and 4 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 noon MDT today.

* IMPACTS...Snow covered roads will make travel hazardous. Plan on 
  slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

Chain and traction laws will possibly be enacted for the mountains. 
The latest road conditions for Colorado can be obtained by calling 5 
1 1 or by going to www.cotrip.org.

&&

$$

COZ035-036-039>041-291800-
/O.CON.KBOU.WS.W.0013.000000T0000Z-231029T1800Z/
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-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-
Including the cities of City of Denver, Central City, Westcreek,
Kiowa, Evergreen, Arvada, Aurora, Golden, Littleton, Fondis,
Larkspur, Bailey, Red Feather Lakes, Georgetown, Denver
International Airport, Boulder, Idaho Springs, Brighton, Castle
Rock, Lakewood, Nederland, Elbert, Highlands Ranch, Parker,
Glendevey, Longmont, and Estes Park
231 AM MDT Sun Oct 29 2023

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT TODAY...

* WHAT...Additional snow accumulations between 1 and 3 inches.

* WHERE...The Northern Front Range Foothills, The Southern Front 
  Range Foothills, Boulder and the western suburbs of Denver, 
  Denver, and Castle Rock.

* WHEN...Until noon MDT today.

* IMPACTS...Snow covered roads will make travel hazardous. Travel 
  may become very difficult to impossible due to heavy snowfall on 
  roadways. 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.

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.

&&

$$

COZ032-037-291800-
/O.CON.KBOU.WW.Y.0033.000000T0000Z-231029T1800Z/
Grand and Summit Counties Below 9000 Feet-Central and Southeast
Park County-
Including the cities of Lake George, Dillon, Fairplay, Kremmling,
South Park, Grand Lake, Granby, Hartsel, Hot Sulphur Springs, and
Fraser
231 AM MDT Sun Oct 29 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT TODAY...

* WHAT...Snow. Additional snow accumulations between 1 and 3 inches.

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

* WHEN...Until noon MDT today.

* IMPACTS...Roads will likely become slick and hazardous. 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.

&&

$$

COZ038-042>046-048>051-291800-
/O.CON.KBOU.WW.Y.0033.000000T0000Z-231029T1800Z/
Larimer County Below 6000 Feet/Northwest Weld County-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-Logan County-
Washington County-Sedgwick County-Phillips County-
Including the cities of Sterling, Greeley, Hugo, Matheson,
Roggen, Amherst, Raymer, Limon, Merino, Cope, Deer Trail, Leader,
Haxtun, Grover, Holyoke, Eaton, Ovid, Loveland, Fort Lupton,
Briggsdale, Otis, Sedgwick, Hereford, Last Chance, Brush, Akron,
Fort Collins, Byers, Julesburg, Crook, Agate, Peetz, Wiggins,
Nunn, Stoneham, Bennett, Fort Morgan, Goodrich, and Pawnee Buttes
231 AM MDT Sun Oct 29 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT TODAY...

* WHAT...Snow, heaviest across Northern Lincoln county. Additional 
  snow accumulations of 1 to 4 inches.

* WHERE...Portions of east central, north central, and northeast 
  Colorado.

* WHEN...Until noon MDT today.

* IMPACTS...Roads will likely become slick and hazardous. 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.

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

Entrekin
580 
WWUS45 KBOU 291022
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
422 AM MDT Sun Oct 29 2023

COZ033-034-291800-
/O.CON.KBOU.WS.W.0013.000000T0000Z-231029T1800Z/
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 Southern Gore Range, Berthoud
Pass, East Slopes Mosquito Range, Williams Fork Mountains, Indian
Peaks, Willow Creek Pass, Rabbit Ears Range, Rocky Mountain
National Park, Eisenhower Tunnel, Mount Blue Sky, Kenosha
Mountains, Cameron Pass, Breckenridge, Laramie and Medicine Bow
Mountains, and Winter Park
422 AM MDT Sun Oct 29 2023

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT TODAY...

* WHAT...Heavy snow. Additional snow accumulations up to two 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 noon MDT today.

* IMPACTS...Snow covered roads will make travel hazardous. Plan on 
  slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

Chain and traction laws will possibly be enacted for the mountains. 
The latest road conditions for Colorado can be obtained by calling 5 
1 1 or by going to www.cotrip.org.

&&

$$

COZ035-036-039>041-291800-
/O.CON.KBOU.WS.W.0013.000000T0000Z-231029T1800Z/
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-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-
Including the cities of Highlands Ranch, Larkspur, Brighton,
Denver International Airport, Golden, Longmont, City of Denver,
Bailey, Evergreen, Idaho Springs, Littleton, Estes Park,
Nederland, Lakewood, Red Feather Lakes, Castle Rock, Fondis,
Central City, Aurora, Glendevey, Westcreek, Parker, Kiowa,
Elbert, Boulder, Arvada, and Georgetown
422 AM MDT Sun Oct 29 2023

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT TODAY...

* WHAT...Heavy snow. Additional snow accumulations up to two inches.

* WHERE...The Northern Front Range Foothills, The Southern Front 
  Range Foothills, Boulder and the western suburbs of Denver, 
  Denver, and Castle Rock.

* WHEN...Until noon MDT today.

* IMPACTS...Snow covered roads will make travel hazardous. Travel 
  may become very difficult to impossible due to heavy snowfall on 
  roadways. 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.

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.

&&

$$

COZ047-291800-
/O.EXA.KBOU.WW.Y.0033.000000T0000Z-231029T1800Z/
Southeast Elbert County Below 6000 Feet/South Lincoln County-
Including the cities of Karval, Kutch, Punkin Center, and Forder
422 AM MDT Sun Oct 29 2023

...WINTER WEATHER ADVISORY IN EFFECT UNTIL NOON MDT TODAY...

* WHAT...Snow increasing across central and southern Lincoln 
  counties. Snow accumulations of 2 to 6 inches.

* WHERE...Southern Lincoln County.

* WHEN...Until noon MDT today.

* 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.

&&

$$

COZ032-037-291800-
/O.CON.KBOU.WW.Y.0033.000000T0000Z-231029T1800Z/
Grand and Summit Counties Below 9000 Feet-Central and Southeast
Park County-
Including the cities of Lake George, South Park, Hot Sulphur
Springs, Kremmling, Grand Lake, Fairplay, Dillon, Granby,
Hartsel, and Fraser
422 AM MDT Sun Oct 29 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT TODAY...

* WHAT...Snow. Additional snow accumulations up to two inches.

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

* WHEN...Until noon MDT today.

* IMPACTS...Roads will likely become slick and hazardous. 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.

&&

$$

COZ038-042>046-048>051-291800-
/O.CON.KBOU.WW.Y.0033.000000T0000Z-231029T1800Z/
Larimer County Below 6000 Feet/Northwest Weld County-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-Logan County-
Washington County-Sedgwick County-Phillips County-
Including the cities of Otis, Brush, Matheson, Sterling,
Briggsdale, Deer Trail, Agate, Pawnee Buttes, Peetz, Eaton,
Goodrich, Fort Lupton, Amherst, Hugo, Grover, Greeley, Fort
Collins, Last Chance, Cope, Sedgwick, Stoneham, Leader, Holyoke,
Raymer, Ovid, Merino, Hereford, Limon, Crook, Loveland,
Julesburg, Fort Morgan, Bennett, Wiggins, Byers, Roggen, Haxtun,
Akron, and Nunn
422 AM MDT Sun Oct 29 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT TODAY...

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

* WHERE...Portions of east central, north central, and northeast 
  Colorado.

* WHEN...Until noon MDT today.

* IMPACTS...Roads will likely become slick and hazardous. 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.

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

Entrekin
182 
WWUS45 KBOU 291025
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
425 AM MDT Sun Oct 29 2023

COZ033-034-291800-
/O.CON.KBOU.WS.W.0013.000000T0000Z-231029T1800Z/
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 Southern Gore Range, Berthoud
Pass, East Slopes Mosquito Range, Williams Fork Mountains, Indian
Peaks, Willow Creek Pass, Rabbit Ears Range, Rocky Mountain
National Park, Eisenhower Tunnel, Mount Blue Sky, Kenosha
Mountains, Cameron Pass, Breckenridge, Laramie and Medicine Bow
Mountains, and Winter Park
425 AM MDT Sun Oct 29 2023

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT TODAY...

* WHAT...Heavy snow. Additional snow accumulations up to two 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 noon MDT today.

* IMPACTS...Roads will likely become slick and hazardous. Snow 
  covered roads will make travel hazardous. 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.

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.

Chain and traction laws will possibly be enacted for the mountains. 
If traveling to the mountains, be prepared for winter driving 
conditions.

&&

$$

COZ035-036-039>041-291800-
/O.CON.KBOU.WS.W.0013.000000T0000Z-231029T1800Z/
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-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-
Including the cities of Highlands Ranch, Larkspur, Brighton,
Denver International Airport, Golden, Longmont, City of Denver,
Bailey, Evergreen, Idaho Springs, Littleton, Estes Park,
Nederland, Lakewood, Red Feather Lakes, Castle Rock, Fondis,
Central City, Aurora, Glendevey, Westcreek, Parker, Kiowa,
Elbert, Boulder, Arvada, and Georgetown
425 AM MDT Sun Oct 29 2023

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT TODAY...

* WHAT...Heavy snow. Additional snow accumulations up to two inches.

* WHERE...The Northern Front Range Foothills, The Southern Front 
  Range Foothills, Boulder and the western suburbs of Denver, 
  Denver, and Castle Rock.

* WHEN...Until noon MDT today.

* IMPACTS...Snow covered roads will make travel hazardous. Travel 
  may become very difficult to impossible due to heavy snowfall on 
  roadways. 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.

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.

&&

$$

COZ032-037-291800-
/O.CON.KBOU.WW.Y.0033.000000T0000Z-231029T1800Z/
Grand and Summit Counties Below 9000 Feet-Central and Southeast
Park County-
Including the cities of Lake George, South Park, Hot Sulphur
Springs, Kremmling, Grand Lake, Fairplay, Dillon, Granby,
Hartsel, and Fraser
425 AM MDT Sun Oct 29 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT TODAY...

* WHAT...Snow. Additional snow accumulations up to two inches.

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

* WHEN...Until noon MDT today.

* IMPACTS...Roads will likely become slick and hazardous. 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.

&&

$$

COZ038-042>046-048>051-291800-
/O.CON.KBOU.WW.Y.0033.000000T0000Z-231029T1800Z/
Larimer County Below 6000 Feet/Northwest Weld County-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-Logan County-
Washington County-Sedgwick County-Phillips County-
Including the cities of Otis, Brush, Matheson, Sterling,
Briggsdale, Deer Trail, Agate, Pawnee Buttes, Peetz, Eaton,
Goodrich, Fort Lupton, Amherst, Hugo, Grover, Greeley, Fort
Collins, Last Chance, Cope, Sedgwick, Stoneham, Leader, Holyoke,
Raymer, Ovid, Merino, Hereford, Limon, Crook, Loveland,
Julesburg, Fort Morgan, Bennett, Wiggins, Byers, Roggen, Haxtun,
Akron, and Nunn
425 AM MDT Sun Oct 29 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT TODAY...

* WHAT...Snow, heaviest across Northern Lincoln county. Additional 
  snow accumulations of 1 to 4 inches.

* WHERE...Portions of east central, north central, and northeast 
  Colorado.

* WHEN...Until noon MDT today.

* IMPACTS...Roads will likely become slick and hazardous. 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.

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

&&

$$

COZ047-291800-
/O.CON.KBOU.WW.Y.0033.000000T0000Z-231029T1800Z/
Southeast Elbert County Below 6000 Feet/South Lincoln County-
Including the cities of Karval, Kutch, Punkin Center, and Forder
425 AM MDT Sun Oct 29 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT TODAY...

* WHAT...Snow increasing across central and southern Lincoln 
  counties. Snow accumulations of 2 to 6 inches.

* WHERE...Southern Lincoln County.

* WHEN...Until noon MDT today.

* 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

Entrekin
466 
WWUS45 KBOU 291815
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
1215 PM MDT Sun Oct 29 2023

COZ033>036-039>041-291915-
/O.EXP.KBOU.WS.W.0013.000000T0000Z-231029T1800Z/
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-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-
Including the cities of Mount Blue Sky, East Slopes Mosquito
Range, Glendevey, Brighton, Longmont, Central City, Laramie and
Medicine Bow Mountains, Eisenhower Tunnel, Nederland, Rabbit Ears
Range, East Slopes Southern Gore Range, Kenosha Mountains,
Arvada, Estes Park, Indian Peaks, Elbert, Lakewood, Berthoud
Pass, Denver International Airport, Golden, Willow Creek Pass,
Parker, Cameron Pass, Kiowa, Rocky Mountain National Park,
Aurora, City of Denver, Castle Rock, Fondis, Williams Fork
Mountains, Larkspur, Winter Park, Breckenridge, Georgetown, Idaho
Springs, Bailey, Highlands Ranch, Littleton, Red Feather Lakes,
Evergreen, Westcreek, and Boulder
1215 PM MDT Sun Oct 29 2023

...WINTER STORM WARNING HAS EXPIRED...

Road conditions vary across the area and many roads are snow covered 
and slick.  Check cotrip.org for the latest road conditions.

$$

COZ032-037-038-042>051-291915-
/O.EXP.KBOU.WW.Y.0033.000000T0000Z-231029T1800Z/
Grand and Summit Counties Below 9000 Feet-Central and Southeast
Park County-Larimer County Below 6000 Feet/Northwest Weld County-
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-
Including the cities of Goodrich, Last Chance, Deer Trail,
Sterling, Grand Lake, Fairplay, Nunn, Roggen, Granby, Ovid,
Raymer, Merino, Wiggins, Greeley, Eaton, Leader, Kutch,
Julesburg, South Park, Byers, Lake George, Fort Collins, Hot
Sulphur Springs, Kremmling, Stoneham, Hartsel, Briggsdale, Fort
Lupton, Sedgwick, Fort Morgan, Fraser, Forder, Brush, Holyoke,
Bennett, Karval, Matheson, Grover, Hugo, Otis, Punkin Center,
Dillon, Crook, Loveland, Amherst, Agate, Hereford, Limon, Pawnee
Buttes, Cope, Peetz, Haxtun, and Akron
1215 PM MDT Sun Oct 29 2023

...WINTER WEATHER ADVISORY HAS EXPIRED...

Road conditions vary across the area and many roads are snow covered 
and slick.  Check cotrip.org for the latest road conditions.

$$

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

Schlatter

What forecasters said that day

The local office's own words before this winter storm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Denver/Boulder, CO wrote its last area forecast discussion before this winter storm warning went out at Oct 26, 11:52 PM MDT, 2 hours 1 minute earlier. Its key messages:

  • Winter storm is expected to bring heavy snowfall across the mountains by late Friday, spreading into the lower elevations this weekend.
  • Much colder temperatures this weekend into early next week, with temperatures falling into the single digits to teens across the entire forecast area.
Area forecast discussion, Oct 26, 11:52 PM MDT, 2 hours 1 minute before
Area Forecast Discussion
National Weather Service Denver/Boulder CO
1152 PM MDT Thu Oct 26 2023

.KEY MESSAGES...

- Winter storm is expected to bring heavy snowfall across the
  mountains by late Friday, spreading into the lower elevations
  this weekend.

- Much colder temperatures this weekend into early next week,
  with temperatures falling into the single digits to teens across
  the entire forecast area.

&&

.UPDATE...
Issued at 603 PM MDT Thu Oct 26 2023

We issued a freeze warning for tonight the Denver/Boulder area
north to Fort Collins and Greeley. Many locations in these areas
have not had a killing freeze yet.

North winds were persistent enough to keep the low cloud edge over
Denver, and it's pushed southward again now. We're getting a brief
surge of 20-30 mph NNE winds now that have brought in colder
saturated air and are producing some drizzle. This should subside
in an hour or two and we'll switch to a more easterly flow with
lighter speeds. There has been some dry air poking into the area
north of Fort Collins/Greeley with some clearing, while colder
saturated air is moving from the Nebraska panhandle across the
rest of northeastern Colorado. It will be interesting to see how
far south the clearing gets and whether the edge of that area
fills in again with fog/low clouds later tonight. We think Denver
will stay under the clouds, but it could be close. There will
likely be some westward push to the fog/stratus later tonight into
Friday morning as the flow reorganizes, with drier air eventually
spreading into the plains and the moisture pooled up against the
foothills. But by mid morning Friday, there will be south winds
coming off the Palmer Divide that should dry out at least the east
side of the Denver area. We've updated everything to try to
portray this complicated pattern. Main change was to the cloud
cover and to add some areas of fog to the lower foothills. We also
dropped tonight's lows a degree or two as the cold advection looks
a little stronger/sooner than forecast.

&&

.SHORT TERM...(This evening through Friday)
Issued at 300 PM MDT Thu Oct 26 2023

Satellite GOES-16 displays pockets of showers near Jackson and
Grand counties. A weak upper level trough continues north passing
Colorado pushing northeast to the Great Lakes. As this system
sweeps through the mountains, mid-level moisture increases along
with westerly flow thus allowing for light snow of 2-4 inches
across parts of Park and Gore Ranges. Fog continues to linger
across the eastern plains and parts of the urban corridor. Our
high temperatures were too high this afternoon thus this
forecaster is still rooting for mid 40s to low 50s across the
plains. With the addition of high clouds entering the CWA and lack
of sun, it is likely our good friend, fog, will stick around
overnight into Friday morning. Uncertainty continues in how long
this will linger into Friday morning but as the next front arrives
Friday morning extending from the foothills to the plains, this
will likely keep low clouds and low visibility just before noon
Friday. Friday afternoon, expect temperatures to trend below
normal across the region. The banding fun begins Friday night in
the long-term period.

.LONG TERM...(Friday night through Thursday)
Issued at 300 PM MDT Thu Oct 26 2023

All eyes turn to some "spooky" weather in the forecast this
weekend as we approach the end of October, with snow and much
colder temperatures in the forecast.

The overall synoptic pattern hasn't changed significantly over
the past several forecasts. A positively-tilted trough axis is
expected to drop from the northwestern Rockies into Utah by late
Saturday night, with a strong upper jet streak lifting into
Colorado. A cold front should push into the lower elevations near
mid-day on Saturday, ushering in much colder air to the region,
while also providing some shallow/weak upslope. The broad/slow
moving trough axis should also provide modest ascent from late
Friday into early Sunday.

There are still some notable differences across guidance that
need to be worked out over the next couple of days. There are two
features worth watching at the moment - (1) the evolution of the
shortwave and its orientation as it detaches from the longwave
trough, and (2) the timing and location of the main upper jet
streak as it lifts into northern Colorado and drifts eastward
Saturday night into Sunday. Given the expected banded nature of
snowfall, any subtle shifts could mean the difference between a
little bit of slush or an impactful snowfall - especially over the
lower elevations, where the upslope/orographic lift is weaker.

All that said, our forecast hasn't changed significantly. A
multi-model/ensemble blend of guidance remains fairly consistent,
despite some wobbling among the deterministic models today, and
has continued the trend of gradually increasing QPF. Heavy snow is
likely across most of our mountain zones, with totals of 9 to 18
inches above 9-10kft. Have opted for a Winter Storm Watch for the
mountain zones with the potential for some heavy snowfall rates at
times, with the most impactful part of the storm coming early
Saturday morning to Saturday night. For the urban corridor and
plains, a couple of inches of snow looks likely (especially west
of I-25)... with the potential for localized totals in excess of 6
inches. Though a few deterministic solutions offered by the 12z
model suite would justify warning criteria in the Denver metro,
we'd need to see a lot more consistency from the near-term/hi-res
guidance to feel confident in bumping up totals significantly.

In addition to the snow, this system is expected to bring much
colder temperatures across the region. The initial cold front on
Saturday should keep highs in the 30s across most of the region,
falling into the teens by Saturday night. Sunday won't be any
warmer, with highs generally near freezing across the plains.
Sunday night's lows should be the coldest of the season, with lows
in the single digits to mid-teens across the urban corridor and
plains. Some of the cold spots in the high country may drop below
zero, especially if we see relatively clear skies.

Cool northwest flow will prevail behind this storm system, with
temperatures gradually warming back towards normal values. Large
scale ridging building across the Western Coast is expected to
gradually shift east and flatten by mid week. Highs are forecast
to remain in the 40s Monday and Tuesday and should make it into
the upper 50s or low 60s by Wednesday.

&&

.AVIATION...(For the 06Z TAFS through 06Z Friday night)
Issued at 1143 PM MDT Thu Oct 26 2023

MVFR ceilings expected to continue until around 12z with bkn-
ovc020-030, with brief pockets of IFR ceilings around 010. Light
SE winds overnight. After 12z Saturday, lower clouds will
scatter out with VFR conditions through Saturday evening. SE
winds will continue at KDEN and KAPA inducing a Denver Cyclone,
which will result in light NNW winds at KBJC. SE winds will
increase this afternoon, with gusts 15-20 kts possible at KAPA.
ILS ceilings 050-070 could start to develop at KDEN towards 12z
Saturday morning.

&&

.BOU WATCHES/WARNINGS/ADVISORIES...
Winter Storm Watch from Friday evening through Sunday morning
for COZ031-033-034.

Freeze Warning until noon MDT Friday for COZ038>040-043.

&&

UPDATE...Gimmestad
SHORT TERM...AD
LONG TERM...Hiris
AVIATION...Cooper
Hazardous weather outlook, Oct 26, 10:29 AM MDT, 15 hours 24 minutes before
Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
1029 AM MDT Thu Oct 26 2023

COZ030>051-271630-
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-
1029 AM MDT Thu Oct 26 2023

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

.DAY ONE...Today and Tonight

Areas of fog continue over parts of the foothills, plains and
along the Urban Corridor north of I-70 late this morning with
local reductions in visibility. This will dissipate by early
afternoon.

Otherwise, mostly dry conditions are expected across the plains
this afternoon. Rain and snow showers will develop in the
mountains this afternoon and evening, with a slight chance of
rain showers along the northern border. Snow accumulations in the
higher mountains will range from 2 to 5 inches.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

A pattern change Friday into the weekend will bring much colder
temperatures along with the potential for heavy snow over the
mountains from late Friday night through Sunday morning.
Accumulating snow will also be possible across the urban corridor
and plains, mainly Saturday afternoon and into Sunday morning. A
hard freeze is also expected across most of the plains this
weekend with low temperatures falling into the teens. Drier and
warmer weather returns for early next week.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today or tonight.

The office that day

Everything else NWS Denver/Boulder, CO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 27, 7:57 AM MDTSpecial Weather StatementBOULarimer2 hr
Oct 27, 2:22 PM MDTWinter Storm WatchBOUAdams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 5 more6 hr
Oct 27, 2:22 PM MDTWinter Weather AdvisoryBOUAdams, Arapahoe, Douglas, Elbert, Grand, Jackson and 10 more46 hr

Nearby

Winter Storm Warnings in Colorado, 2023Every winter storm warning in 2023

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.