Winter Storm Warnings
December 18 2025
* WHAT...Northwest winds 25 to 35 mph with gusts up to 65 mph.
* WHERE...Sedgwick and Phillips Counties, including Julesburg and
Holyoke.
* WHEN...Until noon MST today.
* IMPACTS...Gusty winds will blow around unsecured objects and a few
power outages may result. Travel will be difficult, especially for
high profile vehicles. Strong winds may lead to rapid fire growth
of any new fire.
* WHAT...For the High Wind Warning, west winds 35 to 45 mph with
gusts up to 80 mph for both the High Wind Warning and High Wind
Watch.
* WHERE...Rocky Mountain National Park and the Medicine Bow Range,
and The Mountains of Summit County, the Mosquito Range, and the
Indian Peaks.
* WHEN...For the High Wind Warning, until 11 AM MST this morning. For
the High Wind Watch, from 9 PM MST this evening through Friday
afternoon.
* IMPACTS...Damaging winds may blow down trees and power lines.
Travel will be difficult, especially for high profile vehicles.
* WHAT...West winds 25 to 40 mph with gusts up to 85 mph, strongest
near the base of the foothills.
* WHERE...Fort Collins, and Boulder and the western suburbs of
Denver.
* WHEN...From Friday morning through Friday afternoon.
* IMPACTS...Damaging winds may blow down trees and power lines.
Scattered power outages are possible. Travel will be difficult,
especially for high profile vehicles. Strong winds will lead to
rapid fire growth of any new fire.
* WHAT...West winds 35 to 45 mph with gusts up to 85 mph possible.
* WHERE...The Northern Front Range Foothills, and The Southern Front
Range Foothills. Strongest winds in the foothills of Boulder,
Gilpin, Clear Creek and Jefferson Counties.
* WHEN...From this evening through Friday afternoon.
* IMPACTS...Damaging winds may blow down trees and power lines, with
power outages possible. Travel will be difficult, especially for
high profile vehicles. Strong winds may lead to rapid fire growth
of any new fire in the lower foothills.
* AFFECTED AREA...Fire Weather Zones 234, 236 and 237.
* TIMING...From 11 AM this morning to 5 PM MST this afternoon.
* WINDS...North 20 to 30 mph with gusts up to 55 mph.
* RELATIVE HUMIDITY...As low as 13 percent.
* IMPACTS...Fires will catch and spread quickly. Exercise
extreme caution with any outdoor burning.
The National Weather Service in Pueblo has issued a Fire Weather
Watch for gusty winds and low relative humidity, which is in
effect from Friday morning through Friday afternoon.
* AFFECTED AREA...Fire Weather Zones 226 and 227.
* WINDS...Southwest 10 to 20 mph with gusts up to 35 mph.
* RELATIVE HUMIDITY...As low as 14 percent.
* IMPACTS...Fires will catch and spread quickly. Exercise
extreme caution with any outdoor burning.
* AFFECTED AREA...Fire Weather Zones 228, 229, 230, 231 and 232.
* WINDS...Southwest 15 to 20 mph with gusts up to 35 mph.
* RELATIVE HUMIDITY...As low as 8 percent.
* IMPACTS...Fires will catch and spread quickly. Exercise
extreme caution with any outdoor burning.
...FIRE WEATHER WATCH REMAINS IN EFFECT FROM FRIDAY MORNING
THROUGH FRIDAY AFTERNOON FOR GUSTY WINDS AND LOW RELATIVE
HUMIDITY FOR FIRE WEATHER ZONE 235...
* AFFECTED AREA...Fire Weather Zone 235.
* TIMING...For the Red Flag Warning, from 11 AM this morning to
5 PM MST this afternoon. For the Fire Weather Watch, from
Friday morning through Friday afternoon.
* WINDS...Southwest 15 to 25 mph with gusts up to 45 mph.
* RELATIVE HUMIDITY...As low as 9 percent.
* IMPACTS...Elevated fire danger is expected. Fires will catch
and spread rapidly and erratically.
...FIRE WEATHER WATCH REMAINS IN EFFECT FROM FRIDAY MORNING
THROUGH FRIDAY AFTERNOON FOR GUSTY WINDS AND LOW RELATIVE
HUMIDITY FOR FIRE WEATHER ZONE 235...
* AFFECTED AREA...Fire Weather Zone 235.
* TIMING...For the Red Flag Warning, from 11 AM this morning to
5 PM MST this afternoon. For the Fire Weather Watch, from
Friday morning through Friday afternoon.
* WINDS...Southwest 15 to 25 mph with gusts up to 45 mph.
* RELATIVE HUMIDITY...As low as 9 percent.
* IMPACTS...Elevated fire danger is expected. Fires will catch
and spread rapidly and erratically.
...CRITICAL FIRE WEATHER CONDITIONS THURSDAY AND FRIDAY...
Strong northwest winds will spread across the northeast plains
after sunrise today, with gusts 45 to 65 mph creating critical
fire weather conditions despite somewhat marginal humidity values
near 20%.
Early Friday, westerly downslope winds will bring strong gusts to
the Front Range mountains and foothills, with potential for these
to spread into wind-favored portions of the adjacent lower
elevations. Peak gusts of 70-90 mph are increasing in likelihood
for the windiest locations (considerably lower for areas along and
east of I-25). With a warmer and drier air mass in place,
humidity values in the teens look to extend into much of the
foothills, and certainly across the lower elevations. Such
conditions may be a longer duration than usual, with potential for
low humidity to extend into the evening hours prior to the
arrival of a front.
The National Weather Service in Denver has issued a Red Flag
Warning for wind and low relative humidity, which is in effect
until 5 PM MST this afternoon. A Fire Weather Watch has also been
issued. This Fire Weather Watch for wind and low relative
humidity is in effect from Friday morning through Friday evening.
* AFFECTED AREA...Fire Weather Zone 242.
* TIMING...For the Red Flag Warning, 5 AM through 5 PM MST today.
For the Fire Weather Watch, Friday morning through late Friday
evening.
* WINDS...Today, northwest winds 20 to 30 mph with gusts to 50
mph. Friday, west winds 15 to 25 mph with gusts to 45 mph.
* RELATIVE HUMIDITY...As low as 15% both days.
* IMPACTS...Conditions will be favorable for rapid fire spread.
Avoid outdoor burning and any activity that may produce a
spark and start a wildfire.
...CRITICAL FIRE WEATHER CONDITIONS THURSDAY AND FRIDAY...
Strong northwest winds will spread across the northeast plains
after sunrise today, with gusts 45 to 65 mph creating critical
fire weather conditions despite somewhat marginal humidity values
near 20%.
Early Friday, westerly downslope winds will bring strong gusts to
the Front Range mountains and foothills, with potential for these
to spread into wind-favored portions of the adjacent lower
elevations. Peak gusts of 70-90 mph are increasing in likelihood
for the windiest locations (considerably lower for areas along and
east of I-25). With a warmer and drier air mass in place,
humidity values in the teens look to extend into much of the
foothills, and certainly across the lower elevations. Such
conditions may be a longer duration than usual, with potential for
low humidity to extend into the evening hours prior to the
arrival of a front.
* AFFECTED AREA...Fire Weather Zones 238, 239 and 240.
* TIMING...From Friday morning through Friday evening.
* WINDS...West 25 to 35 mph with gusts 70 to 80 mph near the base
of the foothills. West 15 to 25 mph with gusts up to 45 mph
closer to the I-25 corridor.
* RELATIVE HUMIDITY...As low as 10 percent.
* IMPACTS...Conditions will be favorable for rapid fire spread.
Avoid outdoor burning and any activity that may produce a
spark and start a wildfire.
...CRITICAL FIRE WEATHER CONDITIONS THURSDAY AND FRIDAY...
Strong northwest winds will spread across the northeast plains
after sunrise today, with gusts 45 to 65 mph creating critical
fire weather conditions despite somewhat marginal humidity values
near 20%.
Early Friday, westerly downslope winds will bring strong gusts to
the Front Range mountains and foothills, with potential for these
to spread into wind-favored portions of the adjacent lower
elevations. Peak gusts of 70-90 mph are increasing in likelihood
for the windiest locations (considerably lower for areas along and
east of I-25). With a warmer and drier air mass in place,
humidity values in the teens look to extend into much of the
foothills, and certainly across the lower elevations. Such
conditions may be a longer duration than usual, with potential for
low humidity to extend into the evening hours prior to the
arrival of a front.
The National Weather Service in Denver has issued a Red Flag
Warning for wind and low relative humidity, which is in effect
until 5 PM MST this afternoon. A Fire Weather Watch has also been
issued. This Fire Weather Watch for wind and low relative
humidity is in effect from Friday morning through Friday evening.
* AFFECTED AREA...Fire Weather Zone 242.
* TIMING...For the Red Flag Warning, 5 AM through 5 PM MST today.
For the Fire Weather Watch, Friday morning through late Friday
evening.
* WINDS...Today, northwest winds 20 to 30 mph with gusts to 50
mph. Friday, west winds 15 to 25 mph with gusts to 45 mph.
* RELATIVE HUMIDITY...As low as 15% both days.
* IMPACTS...Conditions will be favorable for rapid fire spread.
Avoid outdoor burning and any activity that may produce a
spark and start a wildfire.
...CRITICAL FIRE WEATHER CONDITIONS THURSDAY AND FRIDAY...
Strong northwest winds will spread across the northeast plains
after sunrise today, with gusts 45 to 65 mph creating critical
fire weather conditions despite somewhat marginal humidity values
near 20%.
Early Friday, westerly downslope winds will bring strong gusts to
the Front Range mountains and foothills, with potential for these
to spread into wind-favored portions of the adjacent lower
elevations. Peak gusts of 70-90 mph are increasing in likelihood
for the windiest locations (considerably lower for areas along and
east of I-25). With a warmer and drier air mass in place,
humidity values in the teens look to extend into much of the
foothills, and certainly across the lower elevations. Such
conditions may be a longer duration than usual, with potential for
low humidity to extend into the evening hours prior to the
arrival of a front.
The National Weather Service in Denver has issued a Red Flag
Warning for wind and low relative humidity, which is in effect
until 5 PM MST this afternoon.
* AFFECTED AREA...Fire Weather Zones 244, 248, 249, 250 and 251.
* TIMING...Until 5 PM MST this afternoon.
* WINDS...Northwest winds 25 to 35 mph with gusts 55 to 65 mph.
* RELATIVE HUMIDITY...15 to 20 percent.
* IMPACTS...Conditions will be favorable for rapid fire spread.
Avoid outdoor burning and any activity that may produce a
spark and start a wildfire.
...CRITICAL FIRE WEATHER CONDITIONS THURSDAY AND FRIDAY...
Strong northwest winds will spread across the northeast plains
after sunrise today, with gusts 45 to 65 mph creating critical
fire weather conditions despite somewhat marginal humidity values
near 20%.
Early Friday, westerly downslope winds will bring strong gusts to
the Front Range mountains and foothills, with potential for these
to spread into wind-favored portions of the adjacent lower
elevations. Peak gusts of 70-90 mph are increasing in likelihood
for the windiest locations (considerably lower for areas along and
east of I-25). With a warmer and drier air mass in place,
humidity values in the teens look to extend into much of the
foothills, and certainly across the lower elevations. Such
conditions may be a longer duration than usual, with potential for
low humidity to extend into the evening hours prior to the
arrival of a front.
The National Weather Service in Denver has issued a Fire Weather
Watch for wind and low relative humidity, which is in effect from
Friday morning through Friday evening.
* AFFECTED AREA...Fire Weather Zones 215, 216, 241, 243, 245,
246 and 247.
* TIMING...From Friday morning through late Friday evening.
* WINDS...West 25 to 35 mph with gusts up to 80 mph in and near
the foothills. West 15 to 25 mph with gusts up to 45 mph for
areas roughly along and east of I-25.
* RELATIVE HUMIDITY...As low as 10 to 15%.
* IMPACTS...Conditions will be favorable for rapid fire spread.
Avoid outdoor burning and any activity that may produce a
spark and start a wildfire.
Residents across Colorado are urged to exercise caution as multiple High Wind Warnings and Watches are in effect, with the National Weather Service reporting damaging west winds of up to 85 mph in areas including Teller County, the Rampart Range, Pikes Peak, and the Wet Mountains. Northwestern Fremont County and the counties of Sedgwick and Phillips are also under alert, with predicted gusts of 60-65 mph causing potential power outages and travel difficulties, particularly for high profile vehicles. Additionally, Red Flag and Fire Weather Watches have been issued due to low humidity and strong winds, heightening wildfire risks in Fire Weather Zones 234, 236, 237, 226, and 227. Cities such as Fort Collins, Boulder, and Denver's western suburbs face the strongest winds, raising concerns for rapid fire growth and widespread power disruptions. Residents are advised to secure outdoor objects, avoid outdoor burning, and prepare for possible power outages while staying updated on the latest weather conditions.
Avalanche Conditions
Arapahoe Basin
1"
Aspen Highlands
8"
Aspen Mountain
8"
Beaver Creek Resort
8"
Breckenridge Ski Resort
8"
Buttermilk Mountain
8"
Conquistador Ski Resort
4"
Copper Mountain Resort
8"
Crested Butte Mountain Resort
8"
Cuchara Mountain Resort
1"
Durango Mountain Resort
2"
Echo Mountain Park
8"
Eldora Mountain Resort
8"
Hesperus Ski Area
2"
Howelsen Hill Ski Area
8"
Kendall Mountain
2"
Keystone Resort
8"
Loveland
8"
Monarch Ski & Snowboard Area
6"
Powderhorn Resort
6"
Silverton Mountain
2"
Ski Broadmoor
6"
Ski Cooper
8"
Ski Estes Park (Hidden Valley)
8"
Snowmass
8"
Solvista Basin At Granby Ranch
8"
Steamboat Ski Resort
8"
Sunlight Mountain Resort
8"
Telluride
2"
Vail
8"
Wolf Creek Ski Area
2"