Alert archive / Colorado / Winter Storm Warnings in 2021

Winter Storm Warning 13, NWS Denver/Boulder, CO

December 29, 202112 counties in Colorado

NWS Denver/Boulder, CO issued this winter storm warning at Dec 29, 2021, 1:18 PM MST for 12 counties in Colorado. It took effect at Dec 30, 2021, 5:00 AM MST. It was in force for 54 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
Dec 29, 2021, 1:18 PM MST (20:18 UTC)
In effect from
Dec 30, 2021, 5:00 AM MST
Expired
Jan 1, 2022, 11:00 AM MST
In force
54 hr
Issued by
NWS Denver/Boulder, CO

Counties Boulder County, CO, Broomfield County, CO, Clear Creek County, CO, Douglas County, CO, Gilpin County, CO, Grand County, CO, Jackson County, CO, Jefferson County, CO, Larimer County, CO, Park County, CO, Summit County, CO, Weld County, CO

The radar

The Denver radar (KFTG), 82 km from the middle of the area, began a volume at 20:20 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
Dec 31, 8:35 AM MSTSNOW 1Poudre Park, CO
Dec 31, 9:20 AM MSTSNOW 14 Ne Nederland, CO
Dec 31, 11:19 AM MSTSNOW 1.51 S Loveland, CO
Dec 31, 11:51 AM MSTSNOW 31 Nne Estes Park, CO0.15 LIQUID EQUIVALENT.
Dec 31, 1:09 PM MSTSNOW 12 Sse Breckenridge, CO
Dec 31, 3:00 PM MSTSNOW 24 Ene Nederland, CO
Dec 31, 3:05 PM MSTSNOW 31 Nnw Genesee, CO
Dec 31, 4:06 PM MSTSNOW 3.72 Nw Loveland, CO
Dec 31, 4:24 PM MSTSNOW 2.81 Nnw Louisville, CO
Dec 31, 4:37 PM MSTSNOW 2.51 Ne Echo Lake, COECHO LAKE SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO
Dec 31, 4:37 PM MSTSNOW 2.51 Ne Echo Lake, COECHO LAKE SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO.
Dec 31, 4:37 PM MSTSNOW 2.55 Ssw Blue River, COHOOSIER PASS SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO.
Dec 31, 4:37 PM MSTSNOW 2.55 Ssw Blue River, COHOOSIER PASS SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO
Dec 31, 4:37 PM MSTSNOW 2.55 W Berthoud Falls, COJONES PASS SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO
Dec 31, 4:37 PM MSTSNOW 2.55 W Berthoud Falls, COJONES PASS SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO.
Dec 31, 4:37 PM MSTSNOW 2.59 Se Weston Pass, COROUGH AND TUMBLE SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO
Dec 31, 4:37 PM MSTSNOW 2.59 Se Weston Pass, COROUGH AND TUMBLE SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO.
Dec 31, 4:37 PM MSTSNOW 3.710 Nne Silverthorne, COMIDDLE FORK CAMP SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO
Dec 31, 4:37 PM MSTSNOW 3.710 Nne Silverthorne, COMIDDLE FORK CAMP SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO.
Dec 31, 4:37 PM MSTSNOW 3.71 W Copper Mountain, COCOPPER MOUNTAIN SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO
Dec 31, 4:37 PM MSTSNOW 3.71 W Copper Mountain, COCOPPER MOUNTAIN SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO.
Dec 31, 4:37 PM MSTSNOW 3.81 Nnw Berthoud Pass, COBERTHOUD SUMMIT SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO
Dec 31, 4:37 PM MSTSNOW 3.81 Nnw Berthoud Pass, COBERTHOUD SUMMIT SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO.
Dec 31, 4:37 PM MSTSNOW 3.83 Wnw Pingree Park, COHOURGLASS LAKE SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO
Dec 31, 4:37 PM MSTSNOW 3.83 Wnw Pingree Park, COHOURGLASS LAKE SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO.
Dec 31, 4:37 PM MSTSNOW 3.87 E Blue River, COMICHIGAN CREEK SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO
Dec 31, 4:37 PM MSTSNOW 3.87 E Blue River, COMICHIGAN CREEK SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO.
Dec 31, 4:37 PM MSTSNOW 53 Sw Meeker Park, COCOPELAND LAKE SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO
Dec 31, 4:37 PM MSTSNOW 53 Sw Meeker Park, COCOPELAND LAKE SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO.
Dec 31, 4:37 PM MSTSNOW 53 Sw Ward, CONIWOT SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO
Dec 31, 4:37 PM MSTSNOW 53 Sw Ward, CONIWOT SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO.
Dec 31, 4:37 PM MSTSNOW 55 Wsw Grand Lake, COSTILLWATER CREEK SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO
Dec 31, 4:37 PM MSTSNOW 55 Wsw Grand Lake, COSTILLWATER CREEK SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO.
Dec 31, 4:37 PM MSTSNOW 56 Nw Silverthorne, COSUMMIT RANCH SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO
Dec 31, 4:37 PM MSTSNOW 56 Nw Silverthorne, COSUMMIT RANCH SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO.
Dec 31, 4:37 PM MSTHEAVY SNOW 6.211 S Rabbit Ears Pass, COBUFFALO PARK SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO
Dec 31, 4:37 PM MSTHEAVY SNOW 6.211 S Rabbit Ears Pass, COBUFFALO PARK SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO.
Dec 31, 4:37 PM MSTHEAVY SNOW 6.21 Wnw Loveland Pass, COLOVELAND BASIN SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO
Dec 31, 4:37 PM MSTHEAVY SNOW 6.21 Wnw Loveland Pass, COLOVELAND BASIN SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO.
Dec 31, 4:37 PM MSTHEAVY SNOW 6.23 S Brainard Lake, COUNIVERSITY CAMP SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO
Dec 31, 4:37 PM MSTHEAVY SNOW 6.23 S Brainard Lake, COUNIVERSITY CAMP SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO.
Dec 31, 4:37 PM MSTHEAVY SNOW 6.26 W Arapahoe Peak, COHIGH LONESOME SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO
Dec 31, 4:37 PM MSTHEAVY SNOW 6.26 W Arapahoe Peak, COHIGH LONESOME SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO.
Dec 31, 4:37 PM MSTHEAVY SNOW 7.51 Sse Loveland Pass, COGRIZZLY PEAK SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO
Dec 31, 4:37 PM MSTHEAVY SNOW 7.51 Sse Loveland Pass, COGRIZZLY PEAK SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO.
Dec 31, 4:37 PM MSTHEAVY SNOW 7.54 S Longs Peak, COWILD BASIN SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO
Dec 31, 4:37 PM MSTHEAVY SNOW 7.54 S Longs Peak, COWILD BASIN SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO.
Dec 31, 4:37 PM MSTHEAVY SNOW 7.56 E Cameron Pass, COLONG DRAW RESERVOIR SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO
Dec 31, 4:37 PM MSTHEAVY SNOW 7.56 E Cameron Pass, COLONG DRAW RESERVOIR SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO.
Dec 31, 4:37 PM MSTHEAVY SNOW 7.57 Nw Red Feather Lakes, COBLACK MOUNTAIN SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO
Dec 31, 4:37 PM MSTHEAVY SNOW 7.57 Nw Red Feather Lakes, COBLACK MOUNTAIN SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO.
Dec 31, 4:37 PM MSTHEAVY SNOW 7.58 Sse Cameron Pass, COPHANTOM VALLEY SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO
Dec 31, 4:37 PM MSTHEAVY SNOW 7.58 Sse Cameron Pass, COPHANTOM VALLEY SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO.
Dec 31, 4:37 PM MSTHEAVY SNOW 8.79 E Glendevey, CODEADMAN HILL SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO
Dec 31, 4:37 PM MSTHEAVY SNOW 8.79 E Glendevey, CODEADMAN HILL SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO.
Dec 31, 4:37 PM MSTHEAVY SNOW 8.79 Se Cameron Pass, COWILLOW PARK SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO
Dec 31, 4:37 PM MSTHEAVY SNOW 8.79 Se Cameron Pass, COWILLOW PARK SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO.
Dec 31, 4:37 PM MSTHEAVY SNOW 8.81 Nnw Cameron Pass, COJOE WRIGHT SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO
Dec 31, 4:37 PM MSTHEAVY SNOW 8.81 Nnw Cameron Pass, COJOE WRIGHT SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO.
Dec 31, 4:37 PM MSTHEAVY SNOW 8.85 Ssw Glendevey, CORAWAH SNOTEL SNOWFALL BETWEEN 5 PM 12/30/2021 AND 3 PM 12/31/2021 ESTIMATED USING A 12.5 TO 1 SNOW-TO-LIQUID RATIO

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 8.3 hours before the alert went out and 193 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, Denver, CO at 12:00Z on 2021-12-29Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 12:00Z on 2021-12-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 87 square meters per square second.19395878Sfc1 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
1757 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
87 m²/s²
0-3 km storm-relative helicity
155 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

217 
WWUS45 KBOU 292018
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
118 PM MST Wed Dec 29 2021

COZ031-033-034-301815-
/O.UPG.KBOU.WS.A.0010.211230T0600Z-220101T1200Z/
/O.NEW.KBOU.WS.W.0013.211230T1200Z-220101T1200Z/
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, Indian Peaks,
Eisenhower Tunnel, Rocky Mountain National Park, East Slopes
Southern Gore Range, Mt Zirkel, Mount Evans, Laramie and Medicine
Bow Mountains, Cameron Pass, Breckenridge, Kenosha Mountains,
Winter Park, Williams Fork Mountains, Willow Creek Pass, Rabbit
Ears Range, and Berthoud Pass
118 PM MST Wed Dec 29 2021

...WINTER STORM WARNING IN EFFECT FROM 5 AM THURSDAY TO 5 AM MST 
SATURDAY...

* WHAT...Heavy snow likely. Total snow accumulations between 10 to 
  20 inches expected, 8 to 16 inches for mountains of Summit County. 
  Heaviest snow expected for the Park Range, Indian Peaks and Rocky 
  Mountain National Park, where locally higher totals will be 
  possible. Strong west winds with gusts 60 to 70 mph also possible 
  on Thursday.

* 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 5 AM Thursday to 5 AM MST Saturday.

* IMPACTS...Travel may become very difficult to impossible due to 
  heavy snowfall on roadways. Travel could be very difficult to 
  impossible. The hazardous conditions could impact the Thursday 
  morning and evening commutes. Gusty winds could bring down tree 
  branches.

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

&&

$$

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

AD
9 follow-up statements
988 
WWUS45 KBOU 300346
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
846 PM MST Wed Dec 29 2021

COZ031-033-034-301315-
/O.CON.KBOU.WS.W.0013.211230T1200Z-220101T1200Z/
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, Indian Peaks,
Eisenhower Tunnel, Rocky Mountain National Park, East Slopes
Southern Gore Range, Mt Zirkel, Mount Evans, Laramie and Medicine
Bow Mountains, Cameron Pass, Breckenridge, Kenosha Mountains,
Winter Park, Williams Fork Mountains, Willow Creek Pass, Rabbit
Ears Range, and Berthoud Pass
846 PM MST Wed Dec 29 2021

...WINTER STORM WARNING REMAINS IN EFFECT FROM 5 AM THURSDAY TO 5 AM 
MST SATURDAY...

* WHAT...Heavy snow likely, especially Thursday night and Friday. 
  Total snow accumulations between 10 to 20 inches expected, 8 to 16 
  inches for mountains of Summit County. Heaviest snow expected for 
  the Park Range, Indian Peaks and Rocky Mountain National Park, 
  where locally higher totals will be possible. Strong west winds 
  with gusts 60 to 75 mph can also be expected on Thursday with 
  blowing snow and poor visibilities on the mountain passes.

* 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 5 AM Thursday to 5 AM MST Saturday. Mainly lighter 
  snow during the day on Thursday, then snow increasing Thursday 
  night and Friday.

* IMPACTS...Travel may become very difficult to impossible due to 
  heavy snowfall on roadways. Travel could be very difficult to 
  impossible. The hazardous conditions could impact the Thursday 
  evening and Friday morning commutes. Gusty winds could bring down 
  tree branches.

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

&&

$$

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

Entrekin
459 
WWUS45 KBOU 301000
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
300 AM MST Thu Dec 30 2021

COZ031-033-034-302200-
/O.EXT.KBOU.WS.W.0013.211230T1200Z-220101T1800Z/
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, Indian Peaks,
Eisenhower Tunnel, Rocky Mountain National Park, East Slopes
Southern Gore Range, Mt Zirkel, Mount Evans, Laramie and Medicine
Bow Mountains, Cameron Pass, Breckenridge, Kenosha Mountains,
Winter Park, Williams Fork Mountains, Willow Creek Pass, Rabbit
Ears Range, and Berthoud Pass
300 AM MST Thu Dec 30 2021

...WINTER STORM WARNING NOW IN EFFECT UNTIL 11 AM MST SATURDAY...

* WHAT...Heavy snow likely, especially Thursday night and Friday. 
  Total snow accumulations between 12 to 24 inches expected, 8 to 16 
  inches for mountains of Summit County. Heaviest snow expected in 
  the Park Range, Indian Peaks and Rocky Mountain National Park, 
  where locally higher totals will be possible. Strong west winds 
  with gusts 60 to 75 mph can also be expected on Thursday with 
  blowing snow and poor visibilities on the mountain passes.

* 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 11 AM MST Saturday.

* IMPACTS...Travel may become very difficult to impossible due to 
  heavy snowfall on roadways. The hazardous conditions could impact 
  the Thursday evening, Friday morning, and Friday evening commutes. 
  Gusty winds could bring down tree branches.

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

&&

$$

COZ030-032-302200-
/O.NEW.KBOU.WW.Y.0037.211231T0000Z-220101T1800Z/
Jackson County Below 9000 Feet-Grand and Summit Counties Below
9000 Feet-
Including the cities of Rand, Granby, North Park, Hot Sulphur
Springs, Dillon, Kremmling, Fraser, Grand Lake, Walden, Gould,
and Spicer
300 AM MST Thu Dec 30 2021

...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 
AM MST SATURDAY...

* WHAT...Snow expected. Total snow accumulations between 5 and 10 
  inches. Winds gusting as high as 35 mph.

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

* WHEN...From 5 PM this afternoon to 11 AM MST Saturday.

* IMPACTS...Travel could be very difficult. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions for Colorado can be obtained by calling 5 1 1 or by going 
to www.cotrip.org

&&

$$

COZ035-036-038-039-302200-
/O.NEW.KBOU.WS.A.0011.211231T1200Z-220101T1800Z/
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-Larimer County
Below 6000 Feet/Northwest Weld County-Boulder And Jefferson
Counties Below 6000 Feet/West Broomfield County-
Including the cities of Evergreen, Georgetown, Glendevey,
Lakewood, Nederland, Golden, Fort Collins, Westcreek, Longmont,
Arvada, Loveland, Central City, Red Feather Lakes, Nunn, Idaho
Springs, Estes Park, Bailey, Hereford, and Boulder
300 AM MST Thu Dec 30 2021

...WINTER STORM WATCH IN EFFECT FROM LATE TONIGHT THROUGH SATURDAY 
MORNING...

* WHAT...Heavy snow possible. Total snow accumulations between 5 and 
  12 inches possible.

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

* WHEN...From late tonight through Saturday morning.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation.

&&

$$

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

Danielson
756 
WWUS45 KBOU 302057
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
157 PM MST Thu Dec 30 2021

COZ030-032-310500-
/O.UPG.KBOU.WW.Y.0037.211231T0000Z-220101T1800Z/
/O.EXB.KBOU.WS.W.0013.211231T0600Z-220101T1800Z/
Jackson County Below 9000 Feet-Grand and Summit Counties Below
9000 Feet-
Including the cities of Rand, Granby, North Park, Hot Sulphur
Springs, Dillon, Kremmling, Fraser, Grand Lake, Walden, Gould,
and Spicer
157 PM MST Thu Dec 30 2021

...WINTER STORM WARNING IN EFFECT FROM 11 PM THIS EVENING TO 11 AM 
MST SATURDAY...

* WHAT...Heavy snow. Total snow accumulations between 6 and 12 
  inches expected. Winds gusting as high as 35 mph.

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

* WHEN...From 11 PM this evening to 11 AM MST Saturday.

* IMPACTS...Expect very difficult travel conditions, with areas of 
  blowing and drifting snow reducing visibility at times.

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

&&

$$

COZ035-036-038-039-310500-
/O.UPG.KBOU.WS.A.0011.211231T1200Z-220101T1800Z/
/O.EXB.KBOU.WS.W.0013.211231T1200Z-220101T1800Z/
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-Larimer County
Below 6000 Feet/Northwest Weld County-Boulder And Jefferson
Counties Below 6000 Feet/West Broomfield County-
Including the cities of Evergreen, Georgetown, Glendevey,
Lakewood, Nederland, Golden, Fort Collins, Westcreek, Longmont,
Arvada, Loveland, Central City, Red Feather Lakes, Nunn, Idaho
Springs, Estes Park, Bailey, Hereford, and Boulder
157 PM MST Thu Dec 30 2021

...WINTER STORM WARNING IN EFFECT FROM 5 AM FRIDAY TO 11 AM MST 
SATURDAY...

* WHAT...Heavy snow likely. Total snow accumulations between 5 and 
  10 inches expected. Higher amounts to 1 foot possible for higher 
  terrain in the foothills and near Estes Park.

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

* WHEN...From 5 AM Friday to 11 AM MST Saturday.

* IMPACTS...Travel could be very difficult. The hazardous conditions 
  could 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

&&

$$

COZ031-033-034-310500-
/O.CON.KBOU.WS.W.0013.000000T0000Z-220101T1800Z/
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, Indian Peaks,
Eisenhower Tunnel, Rocky Mountain National Park, East Slopes
Southern Gore Range, Mt Zirkel, Mount Evans, Laramie and Medicine
Bow Mountains, Cameron Pass, Breckenridge, Kenosha Mountains,
Winter Park, Williams Fork Mountains, Willow Creek Pass, Rabbit
Ears Range, and Berthoud Pass
157 PM MST Thu Dec 30 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST SATURDAY...

* WHAT...Heavy snow. Total snow accumulations between 12 to 24 
  inches expected. Locally higher amounts possible for the Park 
  Range and Rocky Mountain National Park. In addition, strong west 
  winds with gusts 50 to 70 mph are likely through Thursday evening, 
  resulting in near blizzard conditions with widespread blowing snow.

* 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 11 AM MST Saturday.

* IMPACTS...Travel may become very difficult to impossible due to 
  heavy snowfall on roadways. The hazardous conditions could impact 
  the Thursday evening and Friday morning commutes. Gusty winds 
  could bring down tree branches.

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

&&

$$

COZ040>046-048>051-310500-
/O.NEW.KBOU.WW.Y.0038.211231T1800Z-220101T1800Z/
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-Logan County-Washington County-
Sedgwick County-Phillips County-
Including the cities of Wiggins, Pawnee Buttes, Elbert, Hugo,
Roggen, Otis, Julesburg, Larkspur, Agate, Briggsdale, Leader,
Sterling, Fort Morgan, City of Denver, Cope, Aurora, Littleton,
Amherst, Akron, Sedgwick, Raymer, Brighton, Highlands Ranch, Fort
Lupton, Ovid, Matheson, Peetz, Kiowa, Grover, Eaton, Deer Trail,
Byers, Fondis, Denver International Airport, Haxtun, Last Chance,
Parker, Castle Rock, Goodrich, Stoneham, Greeley, Bennett, Crook,
Holyoke, Brush, Limon, and Merino
157 PM MST Thu Dec 30 2021

...WINTER WEATHER ADVISORY IN EFFECT FROM 11 AM FRIDAY TO 11 AM MST 
SATURDAY...

* WHAT...Snow, heavy at times. Total snow accumulations between 2 
  and 6 inches expected. In addition, dangerously cold temperatures 
  are expected beginning Friday night with lows near zero and wind 
  chill values between -10 and -15 degrees.

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

* WHEN...From 11 AM Friday to 11 AM MST Saturday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Friday evening commute. Dangerously 
  low temperatures could pose a threat to life if adequate 
  precautions are not taken while outdoors.

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

Rodriguez
465 
WWUS45 KBOU 310447
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
947 PM MST Thu Dec 30 2021

COZ031-033-034-311300-
/O.CON.KBOU.WS.W.0013.000000T0000Z-220101T1800Z/
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, Indian Peaks,
Eisenhower Tunnel, Rocky Mountain National Park, East Slopes
Southern Gore Range, Mt Zirkel, Mount Evans, Laramie and Medicine
Bow Mountains, Cameron Pass, Breckenridge, Kenosha Mountains,
Winter Park, Williams Fork Mountains, Willow Creek Pass, Rabbit
Ears Range, and Berthoud Pass
947 PM MST Thu Dec 30 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST SATURDAY...

* WHAT...Heavy snow. Total snow accumulations between 12 to 24 
  inches expected. Locally higher amounts possible for the Park 
  Range and Rocky Mountain National Park. In addition, strong west 
  winds with gusts 50 to 70 mph are likely through Thursday evening, 
  resulting in near blizzard conditions with widespread blowing snow.

* 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 11 AM MST Saturday.

* IMPACTS...Travel may become very difficult to impossible due to 
  heavy snowfall on roadways. Travel could be very difficult to 
  impossible. The hazardous conditions could 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

&&

$$

COZ030-032-311300-
/O.CON.KBOU.WS.W.0013.211231T0600Z-220101T1800Z/
Jackson County Below 9000 Feet-Grand and Summit Counties Below
9000 Feet-
Including the cities of Rand, Granby, North Park, Hot Sulphur
Springs, Dillon, Kremmling, Fraser, Grand Lake, Walden, Gould,
and Spicer
947 PM MST Thu Dec 30 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST SATURDAY...

* WHAT...Heavy snow. Total snow accumulations between 6 and 12 
  inches expected. Winds gusting as high as 35 mph.

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

* WHEN...Until 11 AM MST Saturday.

* 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

&&

$$

COZ035-036-038-039-311300-
/O.CON.KBOU.WS.W.0013.211231T1200Z-220101T1800Z/
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-Larimer County
Below 6000 Feet/Northwest Weld County-Boulder And Jefferson
Counties Below 6000 Feet/West Broomfield County-
Including the cities of Evergreen, Georgetown, Glendevey,
Lakewood, Nederland, Golden, Fort Collins, Westcreek, Longmont,
Arvada, Loveland, Central City, Red Feather Lakes, Nunn, Idaho
Springs, Estes Park, Bailey, Hereford, and Boulder
947 PM MST Thu Dec 30 2021

...WINTER STORM WARNING REMAINS IN EFFECT FROM 5 AM FRIDAY TO 11 AM 
MST SATURDAY...

* WHAT...Heavy snow likely. Total snow accumulations between 5 and 
  10 inches expected. Higher amounts to 1 foot possible for higher 
  terrain in the foothills and near Estes Park.

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

* WHEN...From 5 AM Friday to 11 AM MST Saturday.

* IMPACTS...Travel could be very difficult. The hazardous conditions 
  could 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

&&

$$

COZ040>046-048>051-311300-
/O.CON.KBOU.WW.Y.0038.211231T1800Z-220101T1800Z/
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-Logan County-Washington County-
Sedgwick County-Phillips County-
Including the cities of Wiggins, Pawnee Buttes, Elbert, Hugo,
Roggen, Otis, Julesburg, Larkspur, Agate, Briggsdale, Leader,
Sterling, Fort Morgan, City of Denver, Cope, Aurora, Littleton,
Amherst, Akron, Sedgwick, Raymer, Brighton, Highlands Ranch, Fort
Lupton, Ovid, Matheson, Peetz, Kiowa, Grover, Eaton, Deer Trail,
Byers, Fondis, Denver International Airport, Haxtun, Last Chance,
Parker, Castle Rock, Goodrich, Stoneham, Greeley, Bennett, Crook,
Holyoke, Brush, Limon, and Merino
947 PM MST Thu Dec 30 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 11 AM FRIDAY TO 11 
AM MST SATURDAY...

* WHAT...Snow, heavy at times. Total snow accumulations between 2 
  and 6 inches expected. In addition, dangerously cold temperatures 
  are expected beginning Friday night with lows near zero and wind 
  chill values between -10 and -15 degrees.

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

* WHEN...From 11 AM Friday to 11 AM MST Saturday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could 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

&&

$$

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

RJK
973 
WWUS45 KBOU 311404
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
704 AM MST Fri Dec 31 2021

COZ030-032-312315-
/O.CON.KBOU.WS.W.0013.000000T0000Z-220101T1800Z/
Jackson County Below 9000 Feet-Grand and Summit Counties Below
9000 Feet-
Including the cities of Rand, Granby, North Park, Hot Sulphur
Springs, Dillon, Kremmling, Fraser, Grand Lake, Walden, Gould,
and Spicer
704 AM MST Fri Dec 31 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST SATURDAY...

* WHAT...Heavy snow. Total snow accumulations between 6 and 12 
  inches expected. Winds gusting as high as 35 mph.

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

* WHEN...Until 11 AM MST Saturday.

* IMPACTS...Expect very difficult travel conditions, with areas of 
  blowing and drifting snow reducing visibility at times.

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

&&

$$

COZ031-033-034-312315-
/O.CON.KBOU.WS.W.0013.000000T0000Z-220101T1800Z/
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, Indian Peaks,
Eisenhower Tunnel, Rocky Mountain National Park, East Slopes
Southern Gore Range, Mt Zirkel, Mount Evans, Laramie and Medicine
Bow Mountains, Cameron Pass, Breckenridge, Kenosha Mountains,
Winter Park, Williams Fork Mountains, Willow Creek Pass, Rabbit
Ears Range, and Berthoud Pass
704 AM MST Fri Dec 31 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST SATURDAY...

* WHAT...Heavy snow. Total snow accumulations between 12 to 24 
  inches expected. Locally higher amounts possible for the Park 
  Range and Rocky Mountain National Park. Winds gusting as high as 
  45 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 11 AM MST Saturday.

* IMPACTS...Travel may become very difficult to impossible due to 
  heavy snowfall on roadways. The hazardous conditions could 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

&&

$$

COZ035-036-038-039-312315-
/O.CON.KBOU.WS.W.0013.000000T0000Z-220101T1800Z/
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-Larimer County
Below 6000 Feet/Northwest Weld County-Boulder And Jefferson
Counties Below 6000 Feet/West Broomfield County-
Including the cities of Evergreen, Georgetown, Glendevey,
Lakewood, Nederland, Golden, Fort Collins, Westcreek, Longmont,
Arvada, Loveland, Central City, Red Feather Lakes, Nunn, Idaho
Springs, Estes Park, Bailey, Hereford, and Boulder
704 AM MST Fri Dec 31 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST SATURDAY...

* WHAT...Heavy snow likely. Total snow accumulations between 5 and 
  10 inches expected. Higher amounts to 1 foot possible for higher 
  terrain in the foothills and near Estes Park.

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

* WHEN...Until 11 AM MST Saturday.

* IMPACTS...Travel could be very difficult. The hazardous conditions 
  could 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

&&

$$

COZ040>046-048>051-312315-
/O.CON.KBOU.WW.Y.0038.211231T1800Z-220101T1800Z/
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-Logan County-Washington County-
Sedgwick County-Phillips County-
Including the cities of Wiggins, Pawnee Buttes, Elbert, Hugo,
Roggen, Otis, Julesburg, Larkspur, Agate, Briggsdale, Leader,
Sterling, Fort Morgan, City of Denver, Cope, Aurora, Littleton,
Amherst, Akron, Sedgwick, Raymer, Brighton, Highlands Ranch, Fort
Lupton, Ovid, Matheson, Peetz, Kiowa, Grover, Eaton, Deer Trail,
Byers, Fondis, Denver International Airport, Haxtun, Last Chance,
Parker, Castle Rock, Goodrich, Stoneham, Greeley, Bennett, Crook,
Holyoke, Brush, Limon, and Merino
704 AM MST Fri Dec 31 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 11 AM THIS MORNING 
TO 11 AM MST SATURDAY...

* WHAT...Snow, heavy at times. Total snow accumulations between 2 
  and 6 inches expected. In addition, dangerously cold temperatures 
  are expected beginning Friday night with lows near zero and wind 
  chill values between -10 and -20 degrees.

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

* WHEN...From 11 AM this morning to 11 AM MST Saturday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Friday evening commute. Dangerously 
  low temperatures could pose a threat to life if adequate 
  precautions are not taken while outdoors.

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
190 
WWUS45 KBOU 312310
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
410 PM MST Fri Dec 31 2021

COZ030-032-010715-
/O.CON.KBOU.WS.W.0013.000000T0000Z-220101T1800Z/
Jackson County Below 9000 Feet-Grand and Summit Counties Below
9000 Feet-
Including the cities of Rand, Granby, North Park, Hot Sulphur
Springs, Dillon, Kremmling, Fraser, Grand Lake, Walden, Gould,
and Spicer
410 PM MST Fri Dec 31 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST SATURDAY...

* WHAT...Heavy snow ongoing. Additional snow accumulations between 2 
  and 5 inches. Snow diminishing late tonight and early Saturday 
  morning.

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

* WHEN...Until 11 AM MST Saturday.

* IMPACTS...Expect very difficult travel conditions, with areas of 
  blowing and drifting snow reducing visibility at times.

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

&&

$$

COZ031-033-034-010715-
/O.CON.KBOU.WS.W.0013.000000T0000Z-220101T1800Z/
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, Indian Peaks,
Eisenhower Tunnel, Rocky Mountain National Park, East Slopes
Southern Gore Range, Mt Zirkel, Mount Evans, Laramie and Medicine
Bow Mountains, Cameron Pass, Breckenridge, Kenosha Mountains,
Winter Park, Williams Fork Mountains, Willow Creek Pass, Rabbit
Ears Range, and Berthoud Pass
410 PM MST Fri Dec 31 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST SATURDAY...

* WHAT...Heavy snow ongoing. Additional snow accumulations between 4 
  and 8 inches. Snow diminishing late tonight and Saturday morning.

* 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 11 AM MST Saturday.

* IMPACTS...Travel may be difficult due to heavy snowfall on 
  roadways. The hazardous conditions will impact the Friday evening 
  and Saturday morning 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

&&

$$

COZ035-036-038-039-010715-
/O.CON.KBOU.WS.W.0013.000000T0000Z-220101T1800Z/
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-Larimer County
Below 6000 Feet/Northwest Weld County-Boulder And Jefferson
Counties Below 6000 Feet/West Broomfield County-
Including the cities of Evergreen, Georgetown, Glendevey,
Lakewood, Nederland, Golden, Fort Collins, Westcreek, Longmont,
Arvada, Loveland, Central City, Red Feather Lakes, Nunn, Idaho
Springs, Estes Park, Bailey, Hereford, and Boulder
410 PM MST Fri Dec 31 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST SATURDAY...

* WHAT...Heavy snow ongoing. Total snow accumulations between 5 and 
  10 inches expected. Higher amounts to 1 foot possible for higher 
  terrain in the foothills and near Estes Park.

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

* WHEN...Until 11 AM MST Saturday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency. The latest road conditions for 
Colorado can be obtained by calling 5 1 1 or by going to www.cotrip.
org

&&

$$

COZ040>046-048>051-010715-
/O.CON.KBOU.WW.Y.0038.000000T0000Z-220101T1800Z/
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-Logan County-Washington County-
Sedgwick County-Phillips County-
Including the cities of Wiggins, Pawnee Buttes, Elbert, Hugo,
Roggen, Otis, Julesburg, Larkspur, Agate, Briggsdale, Leader,
Sterling, Fort Morgan, City of Denver, Cope, Aurora, Littleton,
Amherst, Akron, Sedgwick, Raymer, Brighton, Highlands Ranch, Fort
Lupton, Ovid, Matheson, Peetz, Kiowa, Grover, Eaton, Deer Trail,
Byers, Fondis, Denver International Airport, Haxtun, Last Chance,
Parker, Castle Rock, Goodrich, Stoneham, Greeley, Bennett, Crook,
Holyoke, Brush, Limon, and Merino
410 PM MST Fri Dec 31 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST 
SATURDAY...

* WHAT...Snow, heavy at times this evening. Total snow accumulations 
  between 2 and 6 inches expected. In addition, dangerously cold 
  temperatures are expected beginning Friday night with lows near 
  zero and wind chill values between -10 and -20 degrees.

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

* WHEN...Until 11 AM MST Saturday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Friday evening commute, especially in 
  the Denver metro area and areas along/north of I-76.

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

Barjenbruch
445 
WWUS45 KBOU 010436
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
936 PM MST Fri Dec 31 2021

COZ030-032-011245-
/O.CON.KBOU.WS.W.0013.000000T0000Z-220101T1800Z/
Jackson County Below 9000 Feet-Grand and Summit Counties Below
9000 Feet-
Including the cities of Rand, Granby, North Park, Hot Sulphur
Springs, Dillon, Kremmling, Fraser, Grand Lake, Walden, Gould,
and Spicer
936 PM MST Fri Dec 31 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST SATURDAY...

* WHAT...Light light will continue with additional snow 
  accumulations of up to 2 inches. Snow diminishing late tonight and 
  early Saturday morning.

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

* WHEN...Until 11 AM MST Saturday.

* 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

&&

$$

COZ031-033-034-011245-
/O.CON.KBOU.WS.W.0013.000000T0000Z-220101T1800Z/
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, Indian Peaks,
Eisenhower Tunnel, Rocky Mountain National Park, East Slopes
Southern Gore Range, Mt Zirkel, Mount Evans, Laramie and Medicine
Bow Mountains, Cameron Pass, Breckenridge, Kenosha Mountains,
Winter Park, Williams Fork Mountains, Willow Creek Pass, Rabbit
Ears Range, and Berthoud Pass
936 PM MST Fri Dec 31 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST SATURDAY...

* WHAT...Light to moderate snow will continue with additional snow 
  accumulations between 1 to 3 more inches. Snow diminishing late 
  tonight and Saturday morning.

* 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 11 AM MST Saturday.

* IMPACTS...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

&&

$$

COZ035-036-038-039-011245-
/O.CON.KBOU.WS.W.0013.000000T0000Z-220101T1800Z/
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-Larimer County
Below 6000 Feet/Northwest Weld County-Boulder And Jefferson
Counties Below 6000 Feet/West Broomfield County-
Including the cities of Evergreen, Georgetown, Glendevey,
Lakewood, Nederland, Golden, Fort Collins, Westcreek, Longmont,
Arvada, Loveland, Central City, Red Feather Lakes, Nunn, Idaho
Springs, Estes Park, Bailey, Hereford, and Boulder
936 PM MST Fri Dec 31 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST SATURDAY...

* WHAT...Light snow will continue with up to 3 more inches of snow 
  accumulation expected.

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

* WHEN...Until 11 AM MST Saturday.

* 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

&&

$$

COZ040>046-048>051-011245-
/O.CON.KBOU.WW.Y.0038.000000T0000Z-220101T1800Z/
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-Logan County-Washington County-
Sedgwick County-Phillips County-
Including the cities of Wiggins, Pawnee Buttes, Elbert, Hugo,
Roggen, Otis, Julesburg, Larkspur, Agate, Briggsdale, Leader,
Sterling, Fort Morgan, City of Denver, Cope, Aurora, Littleton,
Amherst, Akron, Sedgwick, Raymer, Brighton, Highlands Ranch, Fort
Lupton, Ovid, Matheson, Peetz, Kiowa, Grover, Eaton, Deer Trail,
Byers, Fondis, Denver International Airport, Haxtun, Last Chance,
Parker, Castle Rock, Goodrich, Stoneham, Greeley, Bennett, Crook,
Holyoke, Brush, Limon, and Merino
936 PM MST Fri Dec 31 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST 
SATURDAY...

* WHAT...Light snow will continue overnight with accumulations of up 
  to 2 more inches possible.  Cold temperatures are expected 
  beginning overnight through Sunday morning.  Wind chill values 
  will range between -10 and -20 degrees.

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

* WHEN...Until 11 AM MST Saturday.

* 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

RJK
245 
WWUS45 KBOU 011147
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
447 AM MST Sat Jan 1 2022

COZ030>033-035-038-011300-
/O.CAN.KBOU.WS.W.0013.000000T0000Z-220101T1800Z/
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-Larimer and
Boulder Counties Between 6000 and 9000 Feet-Larimer County Below
6000 Feet/Northwest Weld County-
Including the cities of North Park, Rocky Mountain National Park,
Mt Zirkel, Laramie and Medicine Bow Mountains, Red Feather Lakes,
Glendevey, Gould, Nederland, Kremmling, Grand Lake, Cameron Pass,
Nunn, Granby, Hot Sulphur Springs, Loveland, Estes Park,
Hereford, Willow Creek Pass, Spicer, Rand, Dillon, Fort Collins,
Fraser, Walden, and Rabbit Ears Range
447 AM MST Sat Jan 1 2022

...WINTER STORM WARNING IS CANCELLED...

There will be lingering light snow showers this morning but travel 
impacts from these will be minimal. Additional snow accumulation 
will be less than an inch.

$$

COZ042>044-048-050-051-020000-
/O.CAN.KBOU.WW.Y.0038.000000T0000Z-220101T1800Z/
/O.NEW.KBOU.WC.Y.0001.220102T0300Z-220102T1500Z/
Northeast Weld County-Central and South Weld County-Morgan County-
Logan County-Sedgwick County-Phillips County-
Including the cities of Wiggins, Fort Morgan, Roggen, Julesburg,
Briggsdale, Sterling, Pawnee Buttes, Raymer, Amherst, Fort
Lupton, Ovid, Peetz, Grover, Eaton, Sedgwick, Haxtun, Goodrich,
Stoneham, Greeley, Crook, Holyoke, Brush, and Merino
447 AM MST Sat Jan 1 2022

...WIND CHILL ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 8 AM MST 
SUNDAY...
...WINTER WEATHER ADVISORY IS CANCELLED...

* WHAT...Very cold wind chills expected. Wind chills as low as 25 
  below zero.

* WHERE...A portion of northeast Colorado.

* WHEN...From 8 PM this evening to 8 AM MST Sunday.

* IMPACTS...The dangerously cold wind chills could cause frostbite 
  on exposed skin in as little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The combination of wind and cold temperatures will create 
dangerously low wind chill values. If you go outside, cover all 
parts of your body, especially your head, face, and hands.

&&

$$

COZ034-011800-
/O.CON.KBOU.WS.W.0013.000000T0000Z-220101T1800Z/
South and Southeast Grand/West Central and Southwest
Boulder/Gilpin/Clear Creek/Summit/North and West Park Counties
Above 9000 Feet-
Including the cities of Indian Peaks, Eisenhower Tunnel, East
Slopes Southern Gore Range, Mount Evans, East Slopes Mosquito
Range, Breckenridge, Winter Park, Williams Fork Mountains,
Kenosha Mountains, and Berthoud Pass
447 AM MST Sat Jan 1 2022

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS 
MORNING...

* WHAT...Light snow will continue this morning with additional snow 
  accumulations between 1 to 2 inches. Snow will end around midday.

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

* WHEN...Until 11 AM MST this morning.

* IMPACTS...Travel may be very difficult 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

&&

$$

COZ036-039-011800-
/O.CON.KBOU.WS.W.0013.000000T0000Z-220101T1800Z/
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-
Including the cities of Evergreen, Georgetown, Lakewood, Golden,
Westcreek, Arvada, Central City, Longmont, Idaho Springs, Bailey,
and Boulder
447 AM MST Sat Jan 1 2022

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS 
MORNING...

* WHAT...Light snow will continue this morning with additional snow 
  accumulations of around an inch. Snow will end around midday.

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

* WHEN...Until 11 AM MST this morning.

* 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

&&

$$

COZ045-046-049-020000-
/O.NEW.KBOU.WC.Y.0001.220102T0300Z-220102T1500Z/
/O.CON.KBOU.WW.Y.0038.000000T0000Z-220101T1800Z/
Central and East Adams and Arapahoe Counties-North and Northeast
Elbert County Below 6000 Feet/North Lincoln County-Washington
County-
Including the cities of Hugo, Cope, Bennett, Matheson, Otis,
Limon, Deer Trail, Byers, Agate, Last Chance, Leader, and Akron
447 AM MST Sat Jan 1 2022

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS 
MORNING...
...WIND CHILL ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 8 AM MST 
SUNDAY...

* WHAT...For the Wind Chill Advisory, very cold wind chills 
  expected. Wind chills as low as 25 below zero. For the Winter 
  Weather Advisory, light snow is ongoing. Additional snow 
  accumulations up to one inch.

* WHERE...Byers, Limon, and Akron.

* WHEN...For the Wind Chill Advisory, from 8 PM this evening to 8 AM 
  MST Sunday. For the Winter Weather Advisory, until 11 AM MST this 
  morning.

* IMPACTS...Plan on slippery road conditions. The dangerously cold 
  wind chills could cause frostbite on exposed skin in as little as 
  30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The combination of wind and cold temperatures will create 
dangerously low wind chill values. If you go outside, cover all 
parts of your body, especially your head, face, and hands.

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

&&

$$

COZ047-020000-
/O.NEW.KBOU.WC.Y.0001.220102T0300Z-220102T1500Z/
Southeast Elbert County Below 6000 Feet/South Lincoln County-
Including the cities of Forder, Karval, Kutch, and Punkin Center
447 AM MST Sat Jan 1 2022

...WIND CHILL ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 8 AM MST 
SUNDAY...

* WHAT...Very cold wind chills expected. Wind chills as low as 25 
  below zero.

* WHERE...Southern Lincoln County.

* WHEN...From 8 PM this evening to 8 AM MST Sunday.

* IMPACTS...The dangerously cold wind chills could cause frostbite 
  on exposed skin in as little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The combination of wind and cold temperatures will create 
dangerously low wind chill values. If you go outside, cover all 
parts of your body, especially your head, face, and hands.

&&

$$

COZ040-041-011800-
/O.CON.KBOU.WW.Y.0038.000000T0000Z-220101T1800Z/
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, Castle Rock, City of
Denver, Elbert, Aurora, Kiowa, Littleton, Parker, Larkspur,
Fondis, Denver International Airport, and Brighton
447 AM MST Sat Jan 1 2022

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS 
MORNING...

* WHAT...Light snow will continue this morning with additional snow 
  accumulations of around an inch. Snow will end around midday.

* WHERE...Denver, and Castle Rock.

* WHEN...Until 11 AM MST this morning.

* 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

Danielson
945 
WWUS45 KBOU 011754
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
1054 AM MST Sat Jan 1 2022

COZ034-036-039-011900-
/O.EXP.KBOU.WS.W.0013.000000T0000Z-220101T1800Z/
South and Southeast Grand/West Central and Southwest
Boulder/Gilpin/Clear Creek/Summit/North and West Park Counties
Above 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-
Including the cities of Evergreen, Georgetown, Indian Peaks,
Lakewood, Golden, Idaho Springs, Eisenhower Tunnel, East Slopes
Southern Gore Range, Arvada, Mount Evans, Central City, Longmont,
East Slopes Mosquito Range, Breckenridge, Winter Park, Williams
Fork Mountains, Bailey, Kenosha Mountains, Westcreek, Berthoud
Pass, and Boulder
1054 AM MST Sat Jan 1 2022

...WINTER STORM WARNING WILL EXPIRE AT 11 AM MST THIS MORNING...

$$

COZ045-046-049-020000-
/O.EXP.KBOU.WW.Y.0038.000000T0000Z-220101T1800Z/
/O.CON.KBOU.WC.Y.0001.220102T0300Z-220102T1500Z/
Central and East Adams and Arapahoe Counties-North and Northeast
Elbert County Below 6000 Feet/North Lincoln County-Washington
County-
Including the cities of Hugo, Cope, Bennett, Matheson, Otis,
Limon, Deer Trail, Byers, Agate, Last Chance, Leader, and Akron
1054 AM MST Sat Jan 1 2022

...WIND CHILL ADVISORY REMAINS IN EFFECT FROM 8 PM THIS EVENING TO 8 
AM MST SUNDAY...
...WINTER WEATHER ADVISORY WILL EXPIRE AT 11 AM MST THIS MORNING...

* WHAT...For the Wind Chill Advisory, very cold wind chills 
  expected. Wind chills as low as 25 below zero. For the Winter 
  Weather Advisory, light snow is ongoing. Additional snow 
  accumulations up to one inch.

* WHERE...Byers, Limon, and Akron.

* WHEN...From 8 PM this evening to 8 AM MST Sunday.

* IMPACTS...The dangerously cold wind chills could cause frostbite 
  on exposed skin in as little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The combination of wind and cold temperatures will create 
dangerously low wind chill values. If you go outside, cover all 
parts of your body, especially your head, face, and hands.

&&

$$

COZ040-041-011900-
/O.EXP.KBOU.WW.Y.0038.000000T0000Z-220101T1800Z/
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, Castle Rock, City of
Denver, Elbert, Aurora, Kiowa, Littleton, Parker, Larkspur,
Fondis, Denver International Airport, and Brighton
1054 AM MST Sat Jan 1 2022

...WINTER WEATHER ADVISORY WILL EXPIRE AT 11 AM MST THIS MORNING...

$$

COZ042>044-047-048-050-051-020000-
/O.CON.KBOU.WC.Y.0001.220102T0300Z-220102T1500Z/
Northeast Weld County-Central and South Weld County-Morgan County-
Southeast Elbert County Below 6000 Feet/South Lincoln County-
Logan County-Sedgwick County-Phillips County-
Including the cities of Wiggins, Fort Morgan, Roggen, Briggsdale,
Julesburg, Forder, Sterling, Pawnee Buttes, Punkin Center,
Raymer, Amherst, Fort Lupton, Ovid, Peetz, Grover, Eaton,
Sedgwick, Kutch, Haxtun, Goodrich, Stoneham, Karval, Greeley,
Crook, Holyoke, Brush, and Merino
1054 AM MST Sat Jan 1 2022

...WIND CHILL ADVISORY REMAINS IN EFFECT FROM 8 PM THIS EVENING TO 8 
AM MST SUNDAY...

* WHAT...Very cold wind chills expected. Wind chills as low as 25 
  below zero.

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

* WHEN...From 8 PM this evening to 8 AM MST Sunday.

* IMPACTS...The dangerously cold wind chills could cause frostbite 
  on exposed skin in as little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The combination of wind and cold temperatures will create 
dangerously low wind chill values. If you go outside, cover all 
parts of your body, especially your head, face, and hands.

&&

$$

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

Cooper

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 29, 1:36 PM MSTHigh Wind WarningBOUBoulder, Broomfield, Clear Creek, Douglas, Gilpin, Grand and 5 more30 hr

Nearby

Winter Storm Warnings in Colorado, 2021Every winter storm warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.