Alert archive / Colorado / Blizzard Warnings in 2021

Blizzard Warning 5, NWS Denver/Boulder, CO

March 14, 202110 counties in Colorado

NWS Denver/Boulder, CO issued this blizzard warning at Mar 14, 2021, 12:19 PM MDT for 10 counties in Colorado. It was in force for 12 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: Mar 14, 2021, 12:19 PM MDT (18:19 UTC)
Expired: Mar 15, 2021, 12:00 AM MDT
In force: 12 hr
Issued by: NWS Denver/Boulder, CO

Counties Adams County, CO, Arapahoe County, CO, Boulder County, CO, Broomfield County, CO, Denver County, CO, Douglas County, CO, Elbert County, CO, Jefferson County, CO, Larimer County, CO, Weld County, CO

What was reported inside it

Time	Report	Where	Remark
Mar 14, 12:21 PM MDT	SNOW 14.5	2 E Denver, CO	6.4 INCHES PAST 4 HOURS.
Mar 14, 12:25 PM MDT	SNOW 14.6	2 Ene Parker, CO
Mar 14, 12:30 PM MDT	SNOW 15.8	1 Se Frederick, CO	2.06 LIQUID EQUIVALENT.
Mar 14, 12:31 PM MDT	SNOW 9	3 Nne Englewood, CO
Mar 14, 12:34 PM MDT	SNOW 12	1 Ene Ken Caryl, CO	1 INCH PER HOUR ALL MORNING.
Mar 14, 12:36 PM MDT	SNOW 19.5	2 Nw Loveland, CO
Mar 14, 12:43 PM MDT	SNOW 11.5	1 Nnw Louisville, CO
Mar 14, 12:45 PM MDT	SNOW 8.2	3 N Cherry Creek Reserv, CO
Mar 14, 12:52 PM MDT	SNOW 20	1 Ssw Crescent Village, CO	7 INCHES PAST 4.5 HOURS.
Mar 14, 1:04 PM MDT	SNOW 17.2	1 Wnw Northglenn, CO	VISIBILITY UNDER 100 YARDS.
Mar 14, 1:07 PM MDT	SNOW 15	1 Sw Westminster, CO
Mar 14, 1:11 PM MDT	SNOW 15	3 Ne Kelim, CO	1 INCH PAST 45 MINUTES.
Mar 14, 1:13 PM MDT	SNOW 18.1	1 W Firestone, CO
Mar 14, 1:14 PM MDT	SNOW 12	2 Nnw Erie, CO
Mar 14, 1:14 PM MDT	SNOW 16	Mead, CO
Mar 14, 1:15 PM MDT	SNOW 9	2 N Englewood, CO
Mar 14, 1:15 PM MDT	SNOW 10	2 Nne Lakewood, CO
Mar 14, 1:19 PM MDT	SNOW 17.5	3 Wnw Arvada, CO
Mar 14, 1:20 PM MDT	SNOW 13.5	2 Nnw Marshall, CO	1 INCH PER HOUR.
Mar 14, 1:21 PM MDT	SNOW 11.2	2 Wsw Louisville, CO
Mar 14, 1:23 PM MDT	SNOW 12.6	3 Ssw Castle Pines, CO	4.9 INCHES PAST 3 HOURS.
Mar 14, 1:23 PM MDT	SNOW 13	2 E Sunshine, CO
Mar 14, 1:23 PM MDT	SNOW 20	1 Ne Arvada, CO
Mar 14, 1:25 PM MDT	SNOW 17	2 Ssw Rocky Flats, CO
Mar 14, 1:27 PM MDT	SNOW 16.5	2 W Erie, CO
Mar 14, 1:29 PM MDT	SNOW 23.1	3 Sse Aurora, CO
Mar 14, 1:30 PM MDT	SNOW 16.5	4 Ese Denver, CO
Mar 14, 1:36 PM MDT	SNOW 19.7	1 Nne Evergreen, CO
Mar 14, 1:40 PM MDT	SNOW 10.5	1 Se Lafayette, CO
Mar 14, 1:45 PM MDT	SNOW 10	1 Nw Niwot, CO
Mar 14, 1:45 PM MDT	SNOW 17	Broomfield, CO
Mar 14, 1:45 PM MDT	SNOW 18	2 Sse Laporte, CO
Mar 14, 1:45 PM MDT	SNOW 18	3 Ne Longmont, CO	6 INCHES PAST 6 HOURS.
Mar 14, 1:45 PM MDT	SNOW 22	2 N Aspen Park, CO
Mar 14, 1:58 PM MDT	HEAVY SNOW 25	4 Wsw Wallstreet, CO
Mar 14, 2:00 PM MDT	HEAVY SNOW 27	3.1 Wsw Conifer, CO
Mar 14, 2:12 PM MDT	SNOW 15	1 W Mead, CO
Mar 14, 2:15 PM MDT	SNOW 15	5 E Parker, CO
Mar 14, 2:15 PM MDT	SNOW 19	2 W Loveland, CO	4 INCHES PAST 4 HOURS.
Mar 14, 2:17 PM MDT	SNOW 12.3	2 Ese Denver, CO
Mar 14, 2:30 PM MDT	SNOW 15	1 Nw Broomfield, CO
Mar 14, 2:30 PM MDT	SNOW 18.1	3 Ssw Boulder, CO	4.4 INCHES SINCE NOON.
Mar 14, 2:36 PM MDT	SNOW 25.4	1 Nnw Genesee, CO	6 INCHES LAST 3 HOURS.
Mar 14, 2:49 PM MDT	SNOW 18	1 Wnw Northglenn, CO	10 INCHES PAST 5 HOURS.
Mar 14, 3:00 PM MDT	SNOW 15	4 W Arvada, CO
Mar 14, 3:00 PM MDT	SNOW 19	1 Sse Wallstreet, CO
Mar 14, 3:03 PM MDT	SNOW 13.1	2 N Louisville, CO
Mar 14, 3:05 PM MDT	SNOW 16	2 S Erie, CO
Mar 14, 3:06 PM MDT	SNOW 15	1 Wnw Ponderosa Park, CO
Mar 14, 3:10 PM MDT	SNOW 17.7	2 Nnw Roxborough Park, CO
Mar 14, 3:10 PM MDT	BLIZZARD	1 N Castle Rock, CO	VISIBILITY UNDER A QUARTER MILE IN HEAVY SNOW AND BLOWING SNOW SINCE NOON.
Mar 14, 3:15 PM MDT	SNOW 23	Wah Keeney Park, CO
Mar 14, 3:22 PM MDT	SNOW 8.9	4 S Bennett, CO	BLIZZARD, 200 YARD VISIBILITY.
Mar 14, 3:30 PM MDT	SNOW 16	Denver, CO	2.5 INCHES IN THE PAST HOUR.
Mar 14, 3:33 PM MDT	SNOW 16	Louisville, CO	2 INCHES IN THE PAST HOUR.
Mar 14, 3:34 PM MDT	SNOW 16.5	2 Ene Parker, CO
Mar 14, 3:35 PM MDT	SNOW 25	2 S Westminster, CO	4 INCHES IN THE PAST 2 HOURS.
Mar 14, 3:36 PM MDT	SNOW 15.5	1 Ene Ken Caryl, CO
Mar 14, 3:37 PM MDT	SNOW 20.1	1 Ene Brighton, CO	7 FOOT DRIFTS.
Mar 14, 3:38 PM MDT	SNOW 15	4 Nne Cherry Hills Vill, CO

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, 6.3 hours before the alert went out and 135 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 605 m above ground
0-6 km bulk shear: 86 kt
0-1 km storm-relative helicity: 331 m²/s²
0-3 km storm-relative helicity: 383 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

377 
WWUS45 KBOU 141819
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
1219 PM MDT Sun Mar 14 2021

...BLIZZARD CONDITIONS WITH DIFFICULT OR IMPOSSIBLE TRAVEL ALONG THE 
FRONT RANGE THROUGH THIS EVENING...

.Difficult if not impossible travel can be expected across the Front 
Range and I-25 Corridor through this evening due to blizzard 
conditions.  A significant late season winter storm centered over 
southeast Colorado will nearly stall today, and then lift slowly 
northeast and weaken tonight. Significant snow accumulations have 
already occurred across the Front Range Mountains and Foothills, 
with a few spots already seeing greater than 2 feet, and well over a 
foot in the Fort Collins area. Snow will be heavy at times through 
the day in and near the Front Range and I-25 Corridor.  The most 
severe conditions from deep accumulating snow will likely occur in 
and near the Front Range Mountains and Foothills where totals of 2 
to 4 feet can be expected, and along the I-25 Urban Corridor where 1 
to 2 feet will likely fall. The favored locations for the heaviest 
snow totals along the I-25 Corridor will be from Boulder north 
through the Fort Collins area. Temperatures will be warm enough to 
bring a mix of rain and snow across the plains mainly east of a 
Sterling to Limon line. Winds will gust to between 35 and 45 mph, 
producing significant blowing and drifting snow and blizzard 
conditions across the I-25 Corridor.

COZ038>041-043-150230-
/O.UPG.KBOU.WS.W.0004.000000T0000Z-210315T1200Z/
/O.NEW.KBOU.BZ.W.0005.210314T1819Z-210315T0600Z/
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-Central and South Weld County-
Including the cities of Elbert, Roggen, Arvada, Larkspur,
Boulder, City of Denver, Aurora, Littleton, Brighton, Highlands
Ranch, Fort Lupton, Loveland, Kiowa, Eaton, Longmont, Fondis,
Denver International Airport, Golden, Parker, Castle Rock,
Lakewood, Fort Collins, Greeley, Nunn, and Hereford
1219 PM MDT Sun Mar 14 2021

...BLIZZARD WARNING IN EFFECT UNTIL MIDNIGHT MDT TONIGHT...

* WHAT...Blizzard conditions ongoing. Additional snow accumulations 
  of 2 to 6 inches, with storm totals of 14 to 24 inches, heaviest 
  Boulder to Fort Collins corridor. Winds gusting as high as 45 mph.

* WHERE...Fort Collins, Boulder and the western suburbs of Denver, 
  Denver, Castle Rock, and Greeley.

* WHEN...Until Midnight MDT tonight.

* IMPACTS...Do not travel.  Blowing and drifting snow will 
  significantly reduce visibility with whiteout conditions at 
  times.  Scattered power outages can be expected.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Travel should be restricted to emergencies only. If you must travel, 
have a winter survival kit with you. If you get stranded, stay with 
your vehicle. The latest road conditions for Colorado can be 
obtained by calling 5 1 1 or by going to www.cotrip.org

&&

$$

COZ033>036-150230-
/O.CON.KBOU.WS.W.0004.000000T0000Z-210315T1200Z/
South and East Jackson/Larimer/North and Northeast
Grand/Northwest Boulder Counties Above 9000 Feet-South and
Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear
Creek/Summit/North and West Park Counties Above 9000 Feet-Larimer
and Boulder Counties Between 6000 and 9000 Feet-Jefferson and
West Douglas Counties Above 6000 Feet/Gilpin/Clear
Creek/Northeast Park Counties Below 9000 Feet-
Including the cities of Winter Park, Westcreek, Rocky Mountain
National Park, Central City, Red Feather Lakes, Breckenridge,
Bailey, Williams Fork Mountains, Evergreen, Georgetown,
Glendevey, Indian Peaks, Nederland, Eisenhower Tunnel, East
Slopes Southern Gore Range, Mount Evans, Cameron Pass, East
Slopes Mosquito Range, Berthoud Pass, Kenosha Mountains, Estes
Park, Willow Creek Pass, Laramie and Medicine Bow Mountains,
Idaho Springs, and Rabbit Ears Range
1219 PM MDT Sun Mar 14 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM MDT MONDAY...

* WHAT...Heavy snow. Total snow accumulations of 2 to 4 feet.  
  Locations west of the Eisenhower Tunnel will receive 8 to 16 
  inches. Winds could gust as high as 35 mph.

* WHERE...Rocky Mountain National Park and the Medicine Bow Range, 
  The Mountains of Summit County, the Mosquito Range, and the Indian 
  Peaks, The Northern Front Range Foothills, and The Southern Front 
  Range Foothills.

* WHEN...Until 6 AM MDT Monday.

* IMPACTS...Travel will likely be impossible due to the depth of the 
  accumulating snow. Scattered power outages can be expected.

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

&&

$$

COZ042-044-045-150230-
/O.CON.KBOU.WS.W.0004.000000T0000Z-210315T1200Z/
Northeast Weld County-Morgan County-Central and East Adams and
Arapahoe Counties-
Including the cities of Wiggins, Fort Morgan, Pawnee Buttes,
Stoneham, Bennett, Byers, Grover, Brush, Deer Trail, Briggsdale,
Leader, Raymer, and Goodrich
1219 PM MDT Sun Mar 14 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM MDT MONDAY...

* WHAT...Snow, heavy at times today, then snow gradually decreasing 
  overnight. Total snow accumulations of 4 to 16 inches possible, 
  with the heaviest amounts most likely west and northwest of Fort 
  Morgan. Some thundersnow is possible. Winds could gust as high as 
  35 mph with areas of blowing and drifting snow.

* WHERE...Briggsdale, Fort Morgan, and Byers.

* WHEN...Until 6 AM MDT Monday.

* IMPACTS...Travel could be very difficult to impossible in the 
  areas that see the heavier totals.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

COZ030-032-037-150230-
/O.CON.KBOU.WW.Y.0019.000000T0000Z-210315T0700Z/
Jackson County Below 9000 Feet-Grand and Summit Counties Below
9000 Feet-Central and Southeast Park County-
Including the cities of Rand, Granby, North Park, Hartsel, Hot
Sulphur Springs, Dillon, Kremmling, Fraser, Fairplay, Grand Lake,
Walden, Gould, Lake George, Spicer, and South Park
1219 PM MDT Sun Mar 14 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM MDT MONDAY...

* WHAT...Snow. Total snow accumulations of 5 to 14 inches, heaviest 
  in South Park and areas close to Fraser and Grand Lake. Winds 
  gusting as high as 35 mph.

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

* WHEN...Until 1 AM MDT Monday.

* IMPACTS...Travel will be hazardous with slick and snow covered 
  roads.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

COZ031-150230-
/O.CON.KBOU.WW.Y.0019.000000T0000Z-210315T0700Z/
West Jackson and West Grand Counties Above 9000 Feet-
Including the cities of Mt Zirkel
1219 PM MDT Sun Mar 14 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM MDT MONDAY...

* WHAT...Snow and blowing snow. Total snow accumulations of 7 to 16 
  inches. Winds gusting as high as 40 mph.

* WHERE...Rabbit Ears Pass.

* WHEN...Until 1 AM MDT Monday.

* IMPACTS...Travel will be hazardous with slick and snow covered 
  roads, and reduced visibility.

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

&&

$$

COZ046-048-049-150230-
/O.CON.KBOU.WW.Y.0019.000000T0000Z-210315T1200Z/
North and Northeast Elbert County Below 6000 Feet/North Lincoln
County-Logan County-Washington County-
Including the cities of Sterling, Cope, Peetz, Hugo, Matheson,
Otis, Crook, Limon, Agate, Merino, Last Chance, and Akron
1219 PM MDT Sun Mar 14 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM MDT MONDAY...

* WHAT...Mixed rain and snow, and isolated thunderstorms, today. 
  Then turning to all snow this evening. Total snow accumulations of 
  2 to 9 inches. Winds gusting as high as 35 mph. Heaviest snow 
  amounts expected northwest of Sterling, and around the Limon area.

* WHERE...Limon, Sterling, and Akron.

* WHEN...Until 6 AM MDT Monday.

* IMPACTS...Travel could be hazardous with snow and slush covered 
  roads.

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

2 follow-up statements

297 
WWUS45 KBOU 150424
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
1024 PM MDT Sun Mar 14 2021

...STRONG STORM SYSTEM CONTINUES TO IMPACT NORTHERN COLORADO 
TONIGHT...

.Difficult travel can be expected to continue across the Front Range 
and I-25 Corridor and northeast plains tonight. A significant late 
season winter storm centered over southwest Kansas will gradually 
weaken overnight with diminishing snowfall by early Monday morning 
across the plains. The heaviest snow along the I-25 corridor will 
end around midnight, while heavier snow across Washington and 
Northern Lincoln counties will continue through much of tonight.

COZ038>041-043-150600-
/O.CON.KBOU.BZ.W.0005.000000T0000Z-210315T0600Z/
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-Central and South Weld County-
Including the cities of Elbert, Roggen, Arvada, Larkspur,
Boulder, City of Denver, Aurora, Littleton, Brighton, Highlands
Ranch, Fort Lupton, Loveland, Kiowa, Eaton, Longmont, Fondis,
Denver International Airport, Golden, Parker, Castle Rock,
Lakewood, Fort Collins, Greeley, Nunn, and Hereford
1024 PM MDT Sun Mar 14 2021

...BLIZZARD WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT...

* WHAT...Additional snow accumulations of 1 to 4 inches, with storm 
  totals of 14 to 24 inches, heaviest Boulder to Fort Collins 
  corridor. Winds gusting as high as 35 mph.

* WHERE...Fort Collins, Boulder and the western suburbs of Denver, 
  Denver, Castle Rock, and Greeley.

* WHEN...Until Midnight MDT tonight.

* IMPACTS...Plan on slippery road conditions. Areas of blowing snow 
  could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Travel should be restricted to emergencies only. If you must travel, 
have a winter survival kit with you. If you get stranded, stay with 
your vehicle. The latest road conditions for Colorado can be 
obtained by calling 5 1 1 or by going to www.cotrip.org

&&

$$

COZ033>036-151200-
/O.CON.KBOU.WS.W.0004.000000T0000Z-210315T1200Z/
South and East Jackson/Larimer/North and Northeast
Grand/Northwest Boulder Counties Above 9000 Feet-South and
Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear
Creek/Summit/North and West Park Counties Above 9000 Feet-Larimer
and Boulder Counties Between 6000 and 9000 Feet-Jefferson and
West Douglas Counties Above 6000 Feet/Gilpin/Clear
Creek/Northeast Park Counties Below 9000 Feet-
Including the cities of Winter Park, Westcreek, Rocky Mountain
National Park, Central City, Red Feather Lakes, Breckenridge,
Bailey, Williams Fork Mountains, Evergreen, Georgetown,
Glendevey, Indian Peaks, Nederland, Eisenhower Tunnel, East
Slopes Southern Gore Range, Mount Evans, Cameron Pass, East
Slopes Mosquito Range, Berthoud Pass, Kenosha Mountains, Estes
Park, Willow Creek Pass, Laramie and Medicine Bow Mountains,
Idaho Springs, and Rabbit Ears Range
1024 PM MDT Sun Mar 14 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM MDT MONDAY...

* WHAT...Snow diminishing overnight. Additional snowfall of 1 to 4 
  inches, heaviest across southern Front Range foothills.

* WHERE...Rocky Mountain National Park and the Medicine Bow Range, 
  The Mountains of Summit County, the Mosquito Range, and the Indian 
  Peaks, The Northern Front Range Foothills, and The Southern Front 
  Range Foothills.

* WHEN...Until 6 AM MDT Monday.

* 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

&&

$$

COZ042-044-045-151200-
/O.CON.KBOU.WS.W.0004.000000T0000Z-210315T1200Z/
Northeast Weld County-Morgan County-Central and East Adams and
Arapahoe Counties-
Including the cities of Wiggins, Fort Morgan, Pawnee Buttes,
Stoneham, Bennett, Byers, Grover, Brush, Deer Trail, Briggsdale,
Leader, Raymer, and Goodrich
1024 PM MDT Sun Mar 14 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM MDT MONDAY...

* WHAT...Snow, heavy at times tonight, gradually diminishing towards 
  dawn. Heaviest amounts over southern Morgan and eastern portions 
  of Adams and Arapahoe counties. Winds could gust as high as 35 mph 
  with areas of blowing and drifting snow.

* WHERE...Briggsdale, Fort Morgan, and Byers.

* WHEN...Until 6 AM MDT Monday.

* 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

&&

$$

COZ030-032-037-150700-
/O.CON.KBOU.WW.Y.0019.000000T0000Z-210315T0700Z/
Jackson County Below 9000 Feet-Grand and Summit Counties Below
9000 Feet-Central and Southeast Park County-
Including the cities of Rand, Granby, North Park, Hartsel, Hot
Sulphur Springs, Dillon, Kremmling, Fraser, Fairplay, Grand Lake,
Walden, Gould, Lake George, Spicer, and South Park
1024 PM MDT Sun Mar 14 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM MDT MONDAY...

* WHAT...Snow. Additional snowfall up to 2 inches. Winds gusting as 
  high as 35 mph.

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

* WHEN...Until 1 AM MDT Monday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

COZ031-150700-
/O.CON.KBOU.WW.Y.0019.000000T0000Z-210315T0700Z/
West Jackson and West Grand Counties Above 9000 Feet-
Including the cities of Mt Zirkel
1024 PM MDT Sun Mar 14 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM MDT MONDAY...

* WHAT...Snow and blowing snow. Additional snowfall of 1 to 3 inches.

* WHERE...Rabbit Ears Pass.

* WHEN...Until 1 AM MDT Monday.

* 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

&&

$$

COZ046-048-049-151200-
/O.CON.KBOU.WW.Y.0019.000000T0000Z-210315T1200Z/
North and Northeast Elbert County Below 6000 Feet/North Lincoln
County-Logan County-Washington County-
Including the cities of Sterling, Cope, Peetz, Hugo, Matheson,
Otis, Crook, Limon, Agate, Merino, Last Chance, and Akron
1024 PM MDT Sun Mar 14 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM MDT MONDAY...

* WHAT...Snow, heavy at times tonight. Additional snowfall of 3 to 6 
  inches, with locally higher amounts up to 9 inches over southern 
  Washington county.  Winds gusting as high as 35 mph with blowing 
  snow.

* WHERE...Limon, Sterling, and Akron.

* WHEN...Until 6 AM MDT Monday.

* 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

264 
WWUS45 KBOU 150606
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
1206 AM MDT Mon Mar 15 2021

...STORM CONTINUES ACROSS EASTERN PLAINS OF COLORADO TONIGHT...

COZ033>036-150715-
/O.CAN.KBOU.WS.W.0004.000000T0000Z-210315T1200Z/
South and East Jackson/Larimer/North and Northeast
Grand/Northwest Boulder Counties Above 9000 Feet-South and
Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear
Creek/Summit/North and West Park Counties Above 9000 Feet-Larimer
and Boulder Counties Between 6000 and 9000 Feet-Jefferson and
West Douglas Counties Above 6000 Feet/Gilpin/Clear
Creek/Northeast Park Counties Below 9000 Feet-
Including the cities of Winter Park, Westcreek, Rocky Mountain
National Park, Central City, Red Feather Lakes, Breckenridge,
Bailey, Williams Fork Mountains, Evergreen, Georgetown,
Glendevey, Indian Peaks, Nederland, Eisenhower Tunnel, East
Slopes Southern Gore Range, Mount Evans, Cameron Pass, East
Slopes Mosquito Range, Berthoud Pass, Kenosha Mountains, Estes
Park, Willow Creek Pass, Laramie and Medicine Bow Mountains,
Idaho Springs, and Rabbit Ears Range
1206 AM MDT Mon Mar 15 2021

...WINTER STORM WARNING IS CANCELLED...

The threat has ended.

$$

COZ038>041-043-150715-
/O.EXP.KBOU.BZ.W.0005.000000T0000Z-210315T0600Z/
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-Central and South Weld County-
Including the cities of Elbert, Roggen, Arvada, Larkspur,
Boulder, City of Denver, Aurora, Littleton, Brighton, Highlands
Ranch, Fort Lupton, Loveland, Kiowa, Eaton, Longmont, Fondis,
Denver International Airport, Golden, Parker, Castle Rock,
Lakewood, Fort Collins, Greeley, Nunn, and Hereford
1206 AM MDT Mon Mar 15 2021

...BLIZZARD WARNING HAS EXPIRED...

$$

COZ030>032-037-150715-
/O.CAN.KBOU.WW.Y.0019.000000T0000Z-210315T0700Z/
Jackson County Below 9000 Feet-West Jackson and West Grand
Counties Above 9000 Feet-Grand and Summit Counties Below
9000 Feet-Central and Southeast Park County-
Including the cities of Rand, Granby, North Park, Hartsel, Hot
Sulphur Springs, Dillon, Kremmling, Fraser, Mt Zirkel, Fairplay,
Grand Lake, Walden, Gould, Lake George, Spicer, and South Park
1206 AM MDT Mon Mar 15 2021

...WINTER WEATHER ADVISORY IS CANCELLED...

The threat has ended.

$$

COZ042-044-045-151200-
/O.CON.KBOU.WS.W.0004.000000T0000Z-210315T1200Z/
Northeast Weld County-Morgan County-Central and East Adams and
Arapahoe Counties-
Including the cities of Wiggins, Fort Morgan, Pawnee Buttes,
Stoneham, Bennett, Byers, Grover, Brush, Deer Trail, Briggsdale,
Leader, Raymer, and Goodrich
1206 AM MDT Mon Mar 15 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM MDT EARLY THIS 
MORNING...

* WHAT...Snow, heavy at times tonight, gradually diminishing towards 
  dawn. Heaviest amounts over southern Morgan and eastern portions 
  of Adams and Arapahoe counties. Winds could gust as high as 35 mph 
  with areas of blowing and drifting snow.

* WHERE...Briggsdale, Fort Morgan, and Byers.

* WHEN...Until 6 AM MDT early 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

&&

$$

COZ046-048-049-151200-
/O.CON.KBOU.WW.Y.0019.000000T0000Z-210315T1200Z/
North and Northeast Elbert County Below 6000 Feet/North Lincoln
County-Logan County-Washington County-
Including the cities of Sterling, Cope, Peetz, Hugo, Matheson,
Otis, Crook, Limon, Agate, Merino, Last Chance, and Akron
1206 AM MDT Mon Mar 15 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM MDT EARLY 
THIS MORNING...

* WHAT...Snow, heavy at times tonight. Additional snowfall of 2 to 4 
  inches, with locally higher amounts up to 8 inches over southern 
  Washington county.  Winds gusting as high as 35 mph with blowing 
  snow with near blizzard conditons expected.

* WHERE...Limon, Sterling, and Akron.

* WHEN...Until 6 AM MDT early 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

Entrekin

Nearby

Blizzard Warnings in Colorado, 2021 Every blizzard 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.