Alert archive / Colorado / High Wind Warnings in 2025
High Wind Warning 10, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this high wind warning at Dec 17, 2025, 6:57 PM MST for Larimer County, Weld County, Colorado. It was in force for 5 hr. 17 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 17, 2025, 6:57 PM MST (01:57 UTC)
- Expired
- Dec 18, 2025, 12:00 AM MST
- In force
- 5 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Larimer County, CO, Weld County, CO
The radar
The Cheyenne radar (KCYS), 61 km from the middle of the area, began a volume at 02:01 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
| Time | Report | Where | Remark |
|---|---|---|---|
| Dec 17, 7:18 PM MST | NON-TSTM WND GST 82 | 6 Sw Carr, CO | Mesonet station CO166 I-25 and Buckeye Rd. |
| Dec 17, 7:28 PM MST | NON-TSTM WND GST 65 | 1 W Masters, CO | Mesonet station CO222 Dearfield. |
| Dec 17, 7:35 PM MST | NON-TSTM WND GST 81 | 3 Ese Buckeye, CO | Mesonet station BEYC2 Buckeye. |
| Dec 17, 7:45 PM MST | NON-TSTM WND GST 70 | 2 Ssw Laporte, CO | Mesonet station FCC01 Christman Air Field. |
| Dec 17, 7:49 PM MST | NON-TSTM WND GST 74 | 2 W Mishawaka, CO | Mesonet station GW4629 LIVERMORE. |
| Dec 17, 8:07 PM MST | NON-TSTM WND GST 66 | 2 Nnw Briggsdale, CO | Mesonet station TT567 Crow Creek. |
| Dec 17, 8:10 PM MST | NON-TSTM WND GST 64 | Nunn, CO | Mesonet station CO171 Nunn. |
| Dec 17, 8:22 PM MST | NON-TSTM WND GST 58 | 2 Nne New Raymer, CO | AWOS station K1NW 1 NNE New Raymer. |
| Dec 17, 8:32 PM MST | NON-TSTM WND GST 63 | 4 Ne Loveland, CO | AWOS station KFNL Northern Colorado Regional Airport. |
| Dec 17, 8:36 PM MST | NON-TSTM WND GST 58 | 3 Nw Kelim, CO | Mesonet station CO050 I-25 Loveland Crossroads. |
| Dec 17, 8:43 PM MST | NON-TSTM WND GST 67 | 4 Wnw Johnstown, CO | Mesonet station CO223 025s25325rws1rhs - 1.0 Mile S Of. |
| Dec 17, 8:45 PM MST | NON-TSTM WND GST 61 | 4 Ese Estes Park, CO | Mesonet station DW0774 Estes Park. |
| Dec 17, 8:50 PM MST | NON-TSTM WND GST 66 | Virginia Dale, CO | Mesonet station CO036 Virginia Dale. |
| Dec 17, 8:56 PM MST | NON-TSTM WND GST 61 | 3 Nw Kelim, CO | Mesonet station CO050 I-25 Loveland Crossroads. |
| Dec 17, 9:03 PM MST | NON-TSTM WND GST 62 | 1 Ene Milliken, CO | Mesonet station GW3548 MILLIKEN. |
| Dec 17, 9:30 PM MST | NON-TSTM WND GST 63 | 4 Ese Estes Park, CO | Mesonet station DW0774 Estes Park. |
| Dec 17, 9:32 PM MST | NON-TSTM WND GST 62 | Red Feather Lakes, CO | Mesonet station RFRC2 Red Feather RAWS. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Grand Junction, CO (KGJT), launched 00:00Z, 2.0 hours before the alert went out and 347 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2135 m above ground
- 0-6 km bulk shear
- 89 kt
- 0-1 km storm-relative helicity
- 182 m²/s²
- 0-3 km storm-relative helicity
- 583 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
731 WWUS75 KBOU 180157 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver CO 657 PM MST Wed Dec 17 2025 COZ038-181300- /O.EXP.KBOU.HW.W.0009.000000T0000Z-251218T0200Z/ /O.NEW.KBOU.HW.W.0010.251218T0200Z-251218T0700Z/ /O.CON.KBOU.HW.A.0009.251219T1800Z-251220T0000Z/ Larimer County Below 6000 Feet/Northwest Weld County- Including the cities of Hereford, Fort Collins, Nunn, and Loveland 657 PM MST Wed Dec 17 2025 ...HIGH WIND WARNING IN EFFECT UNTIL MIDNIGHT MST TONIGHT... ...HIGH WIND WATCH REMAINS IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY AFTERNOON... * WHAT...For the High Wind Warning, northwest winds 20 to 35 mph with gusts up to 60 mph expected. For the High Wind Watch, west winds 25 to 35 mph with gusts up to 60 mph possible. * WHERE...Fort Collins. * WHEN...For the High Wind Warning, until midnight MST tonight. For the High Wind Watch, from Friday morning through Friday afternoon. * IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result. Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... People are urged to secure loose objects that could be blown around or damaged by the wind. Monitor the latest forecasts and warnings for updates. && $$ COZ039-181300- /O.EXP.KBOU.HW.W.0009.000000T0000Z-251218T0200Z/ /O.CON.KBOU.HW.A.0009.251219T1800Z-251220T0000Z/ Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- Including the cities of Arvada, Golden, Lakewood, Boulder, and Longmont 657 PM MST Wed Dec 17 2025 ...HIGH WIND WARNING WILL EXPIRE AT 7 PM MST THIS EVENING... ...HIGH WIND WATCH REMAINS IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY AFTERNOON... * WHAT...West winds 25 to 40 mph with gusts up to 75 mph possible. * WHERE...Boulder and the western suburbs of Denver. * WHEN...From Friday morning through Friday afternoon. * IMPACTS...Damaging winds may blow down trees and power lines. Scattered power outages are expected. Travel will be difficult, especially for high profile vehicles. Strong winds will lead to rapid fire growth of any new fire. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates. && $$ COZ046-180700- /O.EXB.KBOU.HW.W.0009.251218T0200Z-251218T0700Z/ North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Including the cities of Limon, Agate, Hugo, and Matheson 657 PM MST Wed Dec 17 2025 ...HIGH WIND WARNING IN EFFECT UNTIL MIDNIGHT MST TONIGHT... * WHAT...Northwest winds 25 to 35 mph with gusts up to 60 mph expected. * WHERE...Limon. * WHEN...Until midnight MST tonight. * IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result. Blowing dust will reduce visibility to less than a quarter mile in places. PRECAUTIONARY/PREPAREDNESS ACTIONS... People are urged to secure loose objects that could be blown around or damaged by the wind. && $$ COZ033>036-181300- /O.CON.KBOU.HW.W.0009.000000T0000Z-251218T1200Z/ /O.CON.KBOU.HW.A.0009.251219T0400Z-251220T0000Z/ 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 East Slopes Southern Gore Range, East Slopes Mosquito Range, Georgetown, Idaho Springs, Williams Fork Mountains, Indian Peaks, Winter Park, Red Feather Lakes, Estes Park, Kenosha Mountains, Central City, Laramie and Medicine Bow Mountains, Evergreen, Nederland, Westcreek, Rocky Mountain National Park, Mount Blue Sky, Cameron Pass, Breckenridge, Berthoud Pass, Willow Creek Pass, Bailey, Rabbit Ears Range, Eisenhower Tunnel, and Glendevey 657 PM MST Wed Dec 17 2025 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 AM MST THURSDAY... ...HIGH WIND WATCH REMAINS IN EFFECT FROM THURSDAY EVENING THROUGH FRIDAY AFTERNOON... * WHAT...For the High Wind Warning, west winds 30 to 40 mph with gusts up to 100 mph or more above timberline. Gusts up to 80 mph in the foothills. For the High Wind Watch, west winds 30 to 40 mph with gusts up to 100 mph possible. * 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...For the High Wind Warning, until 5 AM MST Thursday. For the High Wind Watch, from Thursday 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. PRECAUTIONARY/PREPAREDNESS ACTIONS... People are urged to secure loose objects that could be blown around or damaged by the wind. Monitor the latest forecasts and warnings for updates. && $$ COZ042-044-048-049-180700- /O.CON.KBOU.HW.W.0009.000000T0000Z-251218T0700Z/ Northeast Weld County-Morgan County-Logan County-Washington County- Including the cities of Briggsdale, Stoneham, Merino, Otis, Goodrich, Raymer, Last Chance, Pawnee Buttes, Akron, Crook, Brush, Sterling, Grover, Cope, Wiggins, Peetz, and Fort Morgan 657 PM MST Wed Dec 17 2025 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MST TONIGHT... * WHAT...Northwest winds 25 to 40 mph with gusts up to 65 mph possible. * WHERE...Briggsdale, Fort Morgan, Sterling, and Akron. * WHEN...Until midnight MST tonight. * IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result. Travel will be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... People are urged to secure loose objects that could be blown around or damaged by the wind. Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. && $$ COZ050-051-181300- /O.CON.KBOU.HW.W.0009.251218T1200Z-251218T1900Z/ Sedgwick County-Phillips County- Including the cities of Haxtun, Amherst, Sedgwick, Holyoke, Ovid, and Julesburg 657 PM MST Wed Dec 17 2025 ...HIGH WIND WARNING REMAINS IN EFFECT FROM 5 AM TO NOON MST THURSDAY... * WHAT...Northwest winds 25 to 35 mph with gusts up to 60 mph. * WHERE...Sedgwick and Phillips Counties, including Julesburg and Holyoke. * WHEN...From 5 AM to noon MST Thursday. * IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result. Travel will be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... People are urged to secure loose objects that could be blown around or damaged by the wind. && $$ For more information from the National Weather Service, visit https://weather.gov/bou 22
1 follow-up statement
918 WWUS75 KBOU 180655 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver CO 1155 PM MST Wed Dec 17 2025 COZ038-181400- /O.EXP.KBOU.HW.W.0010.000000T0000Z-251218T0700Z/ /O.CON.KBOU.HW.A.0009.251219T1800Z-251220T0000Z/ Larimer County Below 6000 Feet/Northwest Weld County- Including the cities of Loveland, Nunn, Fort Collins, and Hereford 1155 PM MST Wed Dec 17 2025 ...HIGH WIND WARNING WILL EXPIRE AT MIDNIGHT MST TONIGHT... ...HIGH WIND WATCH REMAINS IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY AFTERNOON... * WHAT...West winds 25 to 35 mph with gusts greater than 60 mph possible. * WHERE...Fort Collins. * WHEN...From Friday morning through Friday afternoon. * IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result. Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates. && $$ COZ042-044-046-048-049-180800- /O.EXP.KBOU.HW.W.0009.000000T0000Z-251218T0700Z/ Northeast Weld County-Morgan County-North and Northeast Elbert County Below 6000 Feet/North Lincoln County-Logan County- Washington County- Including the cities of Agate, Pawnee Buttes, Fort Morgan, Limon, Matheson, Last Chance, Stoneham, Otis, Wiggins, Grover, Peetz, Hugo, Brush, Sterling, Crook, Akron, Goodrich, Raymer, Merino, Cope, and Briggsdale 1155 PM MST Wed Dec 17 2025 ...HIGH WIND WARNING WILL EXPIRE AT MIDNIGHT MST TONIGHT... Winds have decreased slightly, but gusts of 40 to 50 mph can still be expected overnight. $$ COZ033>036-181400- /O.CON.KBOU.HW.W.0009.000000T0000Z-251218T1200Z/ /O.CON.KBOU.HW.A.0009.251219T0400Z-251220T0000Z/ 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 Breckenridge, East Slopes Mosquito Range, Kenosha Mountains, Glendevey, Westcreek, Rocky Mountain National Park, Winter Park, Red Feather Lakes, Williams Fork Mountains, Willow Creek Pass, Nederland, Eisenhower Tunnel, Laramie and Medicine Bow Mountains, Cameron Pass, Evergreen, Estes Park, Bailey, Rabbit Ears Range, Central City, Idaho Springs, Berthoud Pass, Georgetown, Mount Blue Sky, Indian Peaks, and East Slopes Southern Gore Range 1155 PM MST Wed Dec 17 2025 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 AM MST THURSDAY... ...HIGH WIND WATCH REMAINS IN EFFECT FROM THURSDAY EVENING THROUGH FRIDAY AFTERNOON... * WHAT...For the High Wind Warning, west winds 30 to 40 mph with gusts up to 100 mph or more above timberline. Gusts up to 80 mph in the foothills. For the High Wind Watch, west winds 30 to 40 mph with gusts up to 100 mph possible. * 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...For the High Wind Warning, until 5 AM MST Thursday. For the High Wind Watch, from Thursday 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. PRECAUTIONARY/PREPAREDNESS ACTIONS... People are urged to secure loose objects that could be blown around or damaged by the wind. Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. Avoid outdoor burning or any activity that may cause sparks. The strong winds may fuel rapid fire growth in areas free of snow cover. && $$ COZ050-051-181400- /O.CON.KBOU.HW.W.0009.251218T1200Z-251218T1900Z/ Sedgwick County-Phillips County- Including the cities of Haxtun, Julesburg, Ovid, Holyoke, Amherst, and Sedgwick 1155 PM MST Wed Dec 17 2025 ...HIGH WIND WARNING REMAINS IN EFFECT FROM 5 AM TO NOON MST THURSDAY... * WHAT...Northwest winds 25 to 35 mph with gusts up to 60 mph. * WHERE...Julesburg, and Holyoke. * WHEN...From 5 AM to noon MST Thursday. * IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result. Travel will be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... People are urged to secure loose objects that could be blown around or damaged by the wind. && $$ COZ039-181400- /O.CON.KBOU.HW.A.0009.251219T1800Z-251220T0000Z/ Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- Including the cities of Golden, Boulder, Longmont, Arvada, and Lakewood 1155 PM MST Wed Dec 17 2025 ...HIGH WIND WATCH REMAINS IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY AFTERNOON... * WHAT...West winds 25 to 40 mph with gusts up to 75 mph possible. * WHERE...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. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates. && $$ For more information from the National Weather Service, visit https://weather.gov/bou 20
What forecasters said that day
The local office's own words before this high wind warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Denver/Boulder, CO wrote its last area forecast discussion before this high wind warning went out at Dec 17, 5:14 PM MST, 1 hour 43 minutes earlier. Its key messages:
- Strong downslope winds impacting foothills and I-25 corridor will end this evening. Widespread wind gusts of 60-80 mph and localized gusts up to 90 mph are possible. A cold front will bring northwest winds gusting 50-60 mph across the northern plains this evening.
- Strong winds will continue to impact the mountains this evening through tomorrow morning, with gusts up to 80-90 mph expected at times.
- Banded snowfall and strong winds will lead to treacherous travel conditions in the mountains this afternoon and evening.
- Strong winds and periods of high fire danger will return Friday, with questions remaining regarding the spatial extent of the strongest winds.
- Mountain snowfall looks to return for Saturday.
Area forecast discussion, Dec 17, 5:14 PM MST, 1 hour 43 minutes before
Area Forecast Discussion National Weather Service Denver/Boulder CO 514 PM MST Wed Dec 17 2025 .KEY MESSAGES... - Strong downslope winds impacting foothills and I-25 corridor will end this evening. Widespread wind gusts of 60-80 mph and localized gusts up to 90 mph are possible. A cold front will bring northwest winds gusting 50-60 mph across the northern plains this evening. - Strong winds will continue to impact the mountains this evening through tomorrow morning, with gusts up to 80-90 mph expected at times. - Banded snowfall and strong winds will lead to treacherous travel conditions in the mountains this afternoon and evening. - Strong winds and periods of high fire danger will return Friday, with questions remaining regarding the spatial extent of the strongest winds. - Mountain snowfall looks to return for Saturday. && .DISCUSSION /Through Wednesday/... Issued at 350 PM MST Wed Dec 17 2025 Winds are currently peaking across the Front Range and lower foothills, with multiple reports of 80+ mph wind gusts. Hi-res guidance continues to indicate strong winds continuing for the next couple of hours for the lower elevations before backing up into the mountains again this evening. We are still on track to let the High Wind Warning expire for the lower foothills this evening, and let the High Wind Warning for the mountains to continue through tomorrow morning. While there will be brief lulls in strong winds along the mountains overnight, generally expect gusts up to 80 mph at times, with a gradual weakening through Thursday late morning/early afternoon. For the plains, gusty winds will continue through early this evening. Then, a cold front is progged to enter the northern plains by 6/7 PM and quickly sweep south. QG fields show deep subsidence over the plains, which will likely help bring down strong winds to the surface. Gusts up to 60 mph are possible, particularly off the Cheyenne Ridge. However, short-range guidance has continued to indicate the strong winds reaching all the way down to Washington county, so have included them in the warning. After midnight, northwest winds weaken below high wind criteria. However, expect gusty winds up to 40-50 mph to continue through the morning hours Thursday. Critical fire weather concerns are expected to continue this afternoon despite marginal relative humidity values. Strong winds along the foothills and adjacent plains will promote rapid fire spread, should a fire occur. However, as winds weaken this evening along the foothills, conditions will improve to let the Red Flag Warning expire. In addition, even with the strong winds expected with the cold front, slightly higher relative humidity values and cooler temperatures will keep fire weather concerns at bay. The Winter Weather Advisory will continue through tonight. Current radar imagery shows snow showers ongoing for the northern mountains, with minimal accumulations so far. However, with guidance indicating strengthening frontogenesis across the higher terrain, banded snow is possible, with snowfall rates reaching 1"/hr to briefly 2"/hr. Total snow accumulations of 3-8" is still on track, with localized higher amounts of 10" possible near ridgetops. Strong winds will cause blowing snow along high passes, which will greatly reduce visiblities. Now for tomorrow. In general, cool temperatures and gusty winds are expected for the entire forecast area. However, the primary concern for strong winds will be across the northeastern plains in the morning. The core of the upper level jet streak is still progged to be overhead Thursday morning, with the 700-mb flow reaching up to 70-80 kts. Modeled soundings indicate steep lapse rates at the same time, which will help mix strong winds down to the surface. In addition, hi-res guidance has continued to show gusts reaching, or barely exceeding, high wind criteria. For this reason, have opted to upgrade Sedgwick and Phillips counties to a High Wind Warning tomorrow, with gusts up to 55-65 mph possible. Elevated to critical fire weather conditions are possible, particularly over the eastern plains (see Fire Weather Discussion). Another mountain wave and high wind event is expected along the front range and foothills late Thursday into Friday. Models are showing cross barrier flow around 70 to 100kts at ridge top. There is a robust pressure gradient shown in the Sangster, with MSL differences around 13 to 14mb between GJT and DEN. Models are hinting at a weak inversion around 600mb in the afternoon and showing some inverse shear in mid levels (80kts to ~50kts higher up). The relatively weak nature of these ingredients lower confidence a bit in the winds making it down towards the I-25 corridor. But, as we saw with the current event, this can definitely change as we get closer to the event. Right now, we have very high confidence in strong winds impacting the higher elevations of the front range, with lowering confidence of really strong winds the further east we go. A High Wind Watch will be in effect late Thursday through late Friday for the mountains and Friday afternoon for zones 38 and 39. The strong winds and dry conditions will lead to fire weather concerns as well (see Fire Weather Discussion). Weak QG subsidence Friday afternoon will transition to weak ascent in the evening as the left exit region of the upper level jet approaches. The approach of the jet will help bring an end to the high wind event and trigger some snow showers in the mountains. The best chance for snow this weekend will be overnight Friday into early Saturday afternoon, with lower chances (<30%) for Sunday. Snow accumulations this weekend are forecast to range from a trace at lower elevations to around 8 inches for the highest elevations. A front will move into the plains Saturday morning. Behind the front, winds will be from the northeast, turning east in the evening. A handful of ensemble members try to bring light showers into the plains behind the front, but most members keep areas east of the front range dry. The front will bring highs down a decent amount for Saturday, but will still remain above normal for this time of the year. Broad upper level ridging will develop over much of the U.S. by Monday. The front range will be breezy again Sunday night into Monday morning at the higher elevations, but this event will not be nearly on the same level as the wind events this week. Temperatures will remain above normal through the middle of next week, with highs in the 50s and 60s for the plains. && .AVIATION /00Z TAFS through 00Z Friday/... Issued at 442 PM MST Wed Dec 17 2025 Winds are expected to be more consistent this evening before the cold front. DEN and APA will have sustained westerly winds around 15-25 knots with gusts from 35-45 knots. BJC will have sustained with between 30-40 knots with gusts up to 75 knots possible. A cold front will move through the terminals between 03-05Z this evening. There could be some rain showers and a brief period of lower ceilings around 3,000 to 4,000 feet. Behind this front, gusts will increase for a short time. Gusts could reach 60 knots at BJC and 50 knots at DEN and APA for a 30 minute window behind this front. Winds will shift more northerly and will slowly decrease in intensity throughout the rest of the night. On Thursday, winds will be relatively light in the morning. A Longmont anticyclone is expected to develop by the afternoon with light north to northeast winds expected at all terminals throughout the day. Winds will shift to the southeast in the evening and then back to drainage overnight. && .FIRE WEATHER... Issued at 350 PM MST Wed Dec 17 2025 Critical fire weather concerns are expected to continue this afternoon despite marginal relative humidity values. However, as winds weaken this evening along the foothills, conditions will improve to let the Red Flag Warning expire. A cold front will arrive this evening, with cooler temperatures and strong winds behind it. Wind gusts up to 60 mph are likely across the northern plains, particularly off the Cheyenne Ridge. However, relative humidity values are expected to increase, which will keep fire weather concerns at bay. Tomorrow, elevated to near critical fire weather conditions are expected across the plains, as northwest winds will gust up to 40-60 mph at times. However, relative humidity values should stay above critical thresholds (generally above 20%). Near critical to critical fire weather conditions are expected west of I-25 on Friday afternoon. Winds will be from the west around 20 to 30 mph, with gusts near 85mph at times. Relative humidity values will be as low as 10% to 20% in the afternoon. Humidity values take a while to recover in the evening, so the Fire Weather Watch goes until 9PM Friday. && .BOU WATCHES/WARNINGS/ADVISORIES... Winter Weather Advisory until 11 PM MST this evening for COZ031- 033. High Wind Warning until 5 AM MST Thursday for COZ033>036. High Wind Watch from Thursday evening through Friday afternoon for COZ033>036. Red Flag Warning until 6 PM MST this evening for COZ238>243-245- 246. High Wind Warning until 7 PM MST this evening for COZ038-039. Fire Weather Watch from Friday morning through Friday evening for COZ238>240. High Wind Watch from Friday morning through Friday afternoon for COZ038-039. High Wind Warning until midnight MST tonight for COZ042-044-048- 049. High Wind Warning from 5 AM to noon MST Thursday for COZ050-051. && DISCUSSION...MAI/AP AVIATION...Danielson FIRE WEATHER...MAI/AP
Hazardous weather outlook, Dec 17, 10:44 AM MST, 8 hours 13 minutes before
Hazardous Weather Outlook National Weather Service Denver/Boulder CO 1044 AM MST Wed Dec 17 2025 COZ030>051-181745- Jackson County Below 9000 Feet- West Jackson and West Grand Counties Above 9000 Feet- Grand and Summit Counties Below 9000 Feet- South and East Jackson/Larimer/North and Northeast Grand/ Northwest Boulder Counties Above 9000 Feet- South and Southeast Grand/West Central and Southwest Boulder/ Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet-Larimer and Boulder Counties Between 6000 and 9000 Feet- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- Central and Southeast Park County- Larimer County Below 6000 Feet/Northwest Weld County- Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- Elbert/Central and East Douglas Counties Above 6000 Feet- Northeast Weld County-Central and South Weld County-Morgan County- Central and East Adams and Arapahoe Counties- North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- Logan County-Washington County-Sedgwick County-Phillips County- 1044 AM MST Wed Dec 17 2025 This hazardous weather outlook is for northeast and north central Colorado. .DAY ONE...Today and Tonight Strong downslope winds will impact the mountains, foothills and I-25 corridor this afternoon and evening. Critical fire weather conditions are expected across the lower foothills and adjacent plains this afternoon. This evening, snow will return to the northern mountains, with reduced visibilities and slick roads expected. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday On Thursday, strong winds and blowing dust may impact the northern plains. Gusty downslope winds and periods of elevated to critical fire weather conditions are expected to return to the mountains and foothills Thursday night into Friday. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed.
In the hours before
Local storm report, Dec 17, 2:29 PM MST, 4 hours 28 minutes before
Preliminary Local Storm Report
National Weather Service Denver CO
229 PM MST Wed Dec 17 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0213 PM Non-Tstm Wnd Gst 3 SW Rocky Flats 39.87N 105.24W
12/17/2025 M97 MPH Jefferson CO Mesonet
Mesonet station CO109 Rocky Flats Hwy 93 and
72.
0154 PM Non-Tstm Wnd Gst 4 SSW Rocky Flats 39.84N 105.22W
12/17/2025 M93 MPH Jefferson CO Mesonet
Mesonet station TT867 Arvada.
0209 PM Non-Tstm Wnd Gst 2 NW Rocky Flats 39.91N 105.23W
12/17/2025 M87 MPH Jefferson CO Mesonet
NRL Flatirons Campus (M2).
0206 PM Non-Tstm Wnd Gst 1 SE Pine Grove 39.41N 105.33W
12/17/2025 M64 MPH Jefferson CO Trained Spotter
0213 PM Non-Tstm Wnd Dmg 1 SSW Conifer 39.50N 105.31W
12/17/2025 Jefferson CO Public
One lodgepole pine snapped off 10 feet off
ground. Estimated to be 80 feet tall.
&&Local storm report, Dec 17, 2:37 PM MST, 4 hours 20 minutes before
Preliminary Local Storm Report...Summary
National Weather Service Denver CO
237 PM MST Wed Dec 17 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0213 PM Non-Tstm Wnd Gst 3 SW Rocky Flats 39.87N 105.24W
12/17/2025 M97 MPH Jefferson CO Mesonet
Mesonet station CO109 Rocky Flats Hwy 93 and
72.
0147 PM Non-Tstm Wnd Gst 3 NW Marshall 39.98N 105.28W
12/17/2025 M96 MPH Boulder CO Mesonet
NCAR Mesa Lab. Time and wind magnitude
estimated from Gill Wind sensor.
0154 PM Non-Tstm Wnd Gst 4 SSW Rocky Flats 39.84N 105.22W
12/17/2025 M93 MPH Jefferson CO Mesonet
Mesonet station TT867 Arvada.
0209 PM Non-Tstm Wnd Gst 2 NW Rocky Flats 39.91N 105.23W
12/17/2025 M87 MPH Jefferson CO Mesonet
NRL Flatirons Campus (M2).
0135 PM Non-Tstm Wnd Gst 1 ENE Boulder 40.03N 105.23W
12/17/2025 M87 MPH Boulder CO AWOS
AWOS station KBDU Boulder.
0120 PM Non-Tstm Wnd Gst 1 NE Crisman 40.05N 105.35W
12/17/2025 M87 MPH Boulder CO Mesonet
Mesonet station EW4338 1 NE Crisman.
0117 PM Non-Tstm Wnd Gst 1 S Boulder 40.02N 105.25W
12/17/2025 M75 MPH Boulder CO Law Enforcement
0222 PM Non-Tstm Wnd Gst 3 S Pine Grove 39.38N 105.34W
12/17/2025 M74 MPH Jefferson CO Mesonet
Mesonet station BAWC2 Bailey.
0223 PM Non-Tstm Wnd Gst 2 S Cheesman Reservoir 39.18N 105.27W
12/17/2025 M73 MPH Douglas CO Mesonet
Mesonet station CHRC2 Cheesman.
0131 PM Non-Tstm Wnd Gst 4 SSW Lyons 40.17N 105.30W
12/17/2025 M72 MPH Boulder CO Mesonet
Mesonet station TT789 Heil Ranch.
0158 PM Non-Tstm Wnd Gst 2 WNW Brookvale 39.64N 105.46W
12/17/2025 M71 MPH Clear Creek CO Mesonet
Mesonet station CEKC2 Corral Creek.
1240 PM Non-Tstm Wnd Gst 4 NNW White Ranch Open 39.87N 105.32W
12/17/2025 M70 MPH Jefferson CO Mesonet
Mesonet station 1925W Coal Creek Canyon.
0130 PM Non-Tstm Wnd Gst 3 E Pinewood Springs 40.28N 105.31W
12/17/2025 M69 MPH Larimer CO Mesonet
Mesonet station GW0895 Lyons.
0120 PM Non-Tstm Wnd Gst 1 NNE Boulder 40.04N 105.24W
12/17/2025 M68 MPH Boulder CO Mesonet
NCAR Foothills Lab.
0115 PM Non-Tstm Wnd Gst 3 NW Boulder 40.05N 105.29W
12/17/2025 M68 MPH Boulder CO Mesonet
Mesonet station BLD02 Boulder North West.
1020 AM Non-Tstm Wnd Gst 4 ENE Nederland 39.99N 105.45W
12/17/2025 M68 MPH Boulder CO Mesonet
Mesonet station DW5338 Nederland.
0914 AM Non-Tstm Wnd Gst 3 SE Tolland 39.87N 105.55W
12/17/2025 M68 MPH Gilpin CO AWOS
AWOS station KC99 Dakota Hill.
0206 PM Non-Tstm Wnd Gst 1 SE Pine Grove 39.41N 105.33W
12/17/2025 M64 MPH Jefferson CO Trained Spotter
0130 PM Non-Tstm Wnd Gst 2 NW Masonville 40.50N 105.22W
12/17/2025 M62 MPH Larimer CO Trained Spotter
1255 PM Non-Tstm Wnd Gst 3 NW Livermore 40.83N 105.27W
12/17/2025 M61 MPH Larimer CO Mesonet
CoAgMet station CKP01 Cherokee Park.
1242 PM Non-Tstm Wnd Gst 3 W Lyons 40.22N 105.33W
12/17/2025 M60 MPH Boulder CO Mesonet
Mesonet station BCFC2 Boulder County Fire
Qd1.
1235 PM Non-Tstm Wnd Gst 3 ESE Buckeye 40.81N 105.04W
12/17/2025 M60 MPH Larimer CO Mesonet
Mesonet station BEYC2 Buckeye.
0213 PM Non-Tstm Wnd Dmg 1 SSW Conifer 39.50N 105.31W
12/17/2025 Jefferson CO Public
One lodgepole pine snapped off 10 feet off
ground. Estimated to be 80 feet tall.
0145 PM Non-Tstm Wnd Dmg 2 SW Boulder 40.00N 105.27W
12/17/2025 Boulder CO Public
Large tree down.
&&Local storm report, Dec 17, 3:48 PM MST, 3 hours 9 minutes before
Preliminary Local Storm Report...Summary
National Weather Service Denver CO
348 PM MST Wed Dec 17 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0213 PM Non-Tstm Wnd Gst 3 SW Rocky Flats 39.87N 105.24W
12/17/2025 M97 MPH Jefferson CO Mesonet
Mesonet station CO109 Rocky Flats Hwy 93 and
72.
0147 PM Non-Tstm Wnd Gst 3 NW Marshall 39.98N 105.28W
12/17/2025 M96 MPH Boulder CO Mesonet
NCAR Mesa Lab. Time and wind magnitude
estimated from Gill Wind sensor.
0154 PM Non-Tstm Wnd Gst 4 SSW Rocky Flats 39.84N 105.22W
12/17/2025 M93 MPH Jefferson CO Mesonet
Mesonet station TT867 Arvada.
0120 PM Non-Tstm Wnd Gst 1 NE Crisman 40.05N 105.35W
12/17/2025 M87 MPH Boulder CO Mesonet
Mesonet station EW4338 1 NE Crisman.
0135 PM Non-Tstm Wnd Gst 1 ENE Boulder 40.03N 105.23W
12/17/2025 M87 MPH Boulder CO AWOS
AWOS station KBDU Boulder.
0209 PM Non-Tstm Wnd Gst 2 NW Rocky Flats 39.91N 105.23W
12/17/2025 M87 MPH Jefferson CO Mesonet
NRL Flatirons Campus (M2).
0117 PM Non-Tstm Wnd Gst 1 S Boulder 40.02N 105.25W
12/17/2025 M75 MPH Boulder CO Law Enforcement
0131 PM Non-Tstm Wnd Gst 4 SSW Lyons 40.17N 105.30W
12/17/2025 M72 MPH Boulder CO Mesonet
Mesonet station TT789 Heil Ranch.
0158 PM Non-Tstm Wnd Gst 2 WNW Brookvale 39.64N 105.46W
12/17/2025 M71 MPH Clear Creek CO Mesonet
Mesonet station CEKC2 Corral Creek.
1240 PM Non-Tstm Wnd Gst 4 NNW White Ranch Open 39.87N 105.32W
12/17/2025 M70 MPH Jefferson CO Mesonet
Mesonet station 1925W Coal Creek Canyon.
0205 PM Non-Tstm Wnd Gst 3 E Pinewood Springs 40.28N 105.31W
12/17/2025 M69 MPH Larimer CO Mesonet
Mesonet station GW0895 Lyons.
0914 AM Non-Tstm Wnd Gst 3 SE Tolland 39.87N 105.55W
12/17/2025 M68 MPH Gilpin CO AWOS
AWOS station KC99 Dakota Hill.
1020 AM Non-Tstm Wnd Gst 4 ENE Nederland 39.99N 105.45W
12/17/2025 M68 MPH Boulder CO Mesonet
Mesonet station DW5338 Nederland.
0115 PM Non-Tstm Wnd Gst 3 NW Boulder 40.05N 105.29W
12/17/2025 M68 MPH Boulder CO Mesonet
Mesonet station BLD02 Boulder North West.
0120 PM Non-Tstm Wnd Gst 1 NNE Boulder 40.04N 105.24W
12/17/2025 M68 MPH Boulder CO Mesonet
NCAR Foothills Lab.
1001 AM Non-Tstm Wnd Gst 2 W Mishawaka 40.70N 105.41W
12/17/2025 M64 MPH Larimer CO Mesonet
Mesonet station GW4629 LIVERMORE.
0134 PM Non-Tstm Wnd Gst 2 SSW Boulder 40.00N 105.26W
12/17/2025 M64 MPH Boulder CO Mesonet
Mesonet station CO040 Boulder US 36/Baseline
Rd.
0206 PM Non-Tstm Wnd Gst 1 SE Pine Grove 39.41N 105.33W
12/17/2025 M64 MPH Jefferson CO Trained Spotter
1100 AM Non-Tstm Wnd Gst 2 NNE Bailey 39.42N 105.46W
12/17/2025 M63 MPH Park CO Mesonet
Mesonet station GW6466 BAILEY.
1132 AM Non-Tstm Wnd Gst Red Feather Lakes 40.80N 105.57W
12/17/2025 M62 MPH Larimer CO Mesonet
Mesonet station RFRC2 Red Feather RAWS.
1255 PM Non-Tstm Wnd Gst 1 ENE Berthoud Pass 39.80N 105.77W
12/17/2025 M62 MPH Grand CO AWOS
AWOS station K0CO Berthoud Pass.
0111 PM Non-Tstm Wnd Gst 6 SW Carr 40.84N 104.97W
12/17/2025 M62 MPH Larimer CO Mesonet
Mesonet station CO166 I-25 and Buckeye Rd.
0123 PM Non-Tstm Wnd Gst 2 NNE Natural Fort 40.99N 104.91W
12/17/2025 M62 MPH Weld CO Mesonet
Mesonet station CO041 I-25 at Wyoming
Border.
0128 PM Non-Tstm Wnd Gst 3 NE Boulder 40.06N 105.21W
12/17/2025 M62 MPH Boulder CO Mesonet
Mesonet station DW0417 Boulder.
0130 PM Non-Tstm Wnd Gst 2 NW Masonville 40.50N 105.22W
12/17/2025 M62 MPH Larimer CO Trained Spotter
1255 PM Non-Tstm Wnd Gst 3 NW Livermore 40.83N 105.27W
12/17/2025 M61 MPH Larimer CO Mesonet
CoAgMet station CKP01 Cherokee Park.
1015 AM Non-Tstm Wnd Gst Nederland 39.96N 105.50W
12/17/2025 M60 MPH Boulder CO Mesonet
Mesonet station DVI07801 Nederland.
1145 AM Non-Tstm Wnd Gst 4 ESE Estes Park 40.36N 105.45W
12/17/2025 M60 MPH Larimer CO Mesonet
Mesonet station DW0774 Estes Park.
1235 PM Non-Tstm Wnd Gst 3 ESE Buckeye 40.81N 105.04W
12/17/2025 M60 MPH Larimer CO Mesonet
Mesonet station BEYC2 Buckeye.
1242 PM Non-Tstm Wnd Gst 3 W Lyons 40.22N 105.33W
12/17/2025 M60 MPH Boulder CO Mesonet
Mesonet station BCFC2 Boulder County Fire
Qd1.
0145 PM Non-Tstm Wnd Dmg 2 SW Boulder 40.00N 105.27W
12/17/2025 Boulder CO Public
Large tree down.
0213 PM Non-Tstm Wnd Dmg 1 SSW Conifer 39.50N 105.31W
12/17/2025 Jefferson CO Public
One lodgepole pine snapped off 10 feet off
ground. Estimated to be 80 feet tall.
&&Local storm report, Dec 17, 3:51 PM MST, 3 hours 6 minutes before
Preliminary Local Storm Report...Summary
National Weather Service Denver CO
351 PM MST Wed Dec 17 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0213 PM Non-Tstm Wnd Gst 3 SW Rocky Flats 39.87N 105.24W
12/17/2025 M97 MPH Jefferson CO Mesonet
Mesonet station CO109 Rocky Flats Hwy 93 and
72.
0147 PM Non-Tstm Wnd Gst 3 NW Marshall 39.98N 105.28W
12/17/2025 M96 MPH Boulder CO Mesonet
NCAR Mesa Lab. Time and wind magnitude
estimated from Gill Wind sensor.
0154 PM Non-Tstm Wnd Gst 4 SSW Rocky Flats 39.84N 105.22W
12/17/2025 M93 MPH Jefferson CO Mesonet
Mesonet station TT867 Arvada.
0321 PM Non-Tstm Wnd Gst 1 NE Crisman 40.05N 105.35W
12/17/2025 M93 MPH Boulder CO Mesonet
Mesonet station EW4338 1 NE Crisman.
0135 PM Non-Tstm Wnd Gst 1 ENE Boulder 40.03N 105.23W
12/17/2025 M87 MPH Boulder CO AWOS
AWOS station KBDU Boulder.
0209 PM Non-Tstm Wnd Gst 2 NW Rocky Flats 39.91N 105.23W
12/17/2025 M87 MPH Jefferson CO Mesonet
NRL Flatirons Campus (M2).
0255 PM Non-Tstm Wnd Gst 3 S Boulder 39.99N 105.27W
12/17/2025 M80 MPH Boulder CO Trained Spotter
0117 PM Non-Tstm Wnd Gst 1 S Boulder 40.02N 105.25W
12/17/2025 M75 MPH Boulder CO Law Enforcement
0222 PM Non-Tstm Wnd Gst 3 S Pine Grove 39.38N 105.34W
12/17/2025 M74 MPH Jefferson CO Mesonet
Mesonet station BAWC2 Bailey.
0249 PM Non-Tstm Wnd Gst Floyd Hill 39.72N 105.41W
12/17/2025 M74 MPH Clear Creek CO Mesonet
Mesonet station CO071 I-70 Floyd Hill.
0223 PM Non-Tstm Wnd Gst 2 S Cheesman Reservoir 39.18N 105.27W
12/17/2025 M73 MPH Douglas CO Mesonet
Mesonet station CHRC2 Cheesman.
0131 PM Non-Tstm Wnd Gst 4 SSW Lyons 40.17N 105.30W
12/17/2025 M72 MPH Boulder CO Mesonet
Mesonet station TT789 Heil Ranch.
0158 PM Non-Tstm Wnd Gst 2 WNW Brookvale 39.64N 105.46W
12/17/2025 M71 MPH Clear Creek CO Mesonet
Mesonet station CEKC2 Corral Creek.
1240 PM Non-Tstm Wnd Gst 4 NNW White Ranch Open 39.87N 105.32W
12/17/2025 M70 MPH Jefferson CO Mesonet
Mesonet station 1925W Coal Creek Canyon.
0205 PM Non-Tstm Wnd Gst 3 E Pinewood Springs 40.28N 105.31W
12/17/2025 M69 MPH Larimer CO Mesonet
Mesonet station GW0895 Lyons.
0323 PM Non-Tstm Wnd Gst 3 ESE Pinecliffe 39.91N 105.38W
12/17/2025 M69 MPH Boulder CO Mesonet
Mesonet station FW8937 Wondervu.
0914 AM Non-Tstm Wnd Gst 3 SE Tolland 39.87N 105.55W
12/17/2025 M68 MPH Gilpin CO AWOS
AWOS station KC99 Dakota Hill.
1020 AM Non-Tstm Wnd Gst 4 ENE Nederland 39.99N 105.45W
12/17/2025 M68 MPH Boulder CO Mesonet
Mesonet station DW5338 Nederland.
0115 PM Non-Tstm Wnd Gst 3 NW Boulder 40.05N 105.29W
12/17/2025 M68 MPH Boulder CO Mesonet
Mesonet station BLD02 Boulder North West.
0120 PM Non-Tstm Wnd Gst 1 NNE Boulder 40.04N 105.24W
12/17/2025 M68 MPH Boulder CO Mesonet
NCAR Foothills Lab.
0239 PM Non-Tstm Wnd Gst 5 S Lyons 40.15N 105.27W
12/17/2025 M68 MPH Boulder CO Mesonet
Mesonet station EW8833 Longmont.
0300 PM Non-Tstm Wnd Gst Aspen Springs 39.83N 105.48W
12/17/2025 M67 MPH Gilpin CO Mesonet
Mesonet station CW5066 Aspen Springs.
1001 AM Non-Tstm Wnd Gst 2 W Mishawaka 40.70N 105.41W
12/17/2025 M64 MPH Larimer CO Mesonet
Mesonet station GW4629 LIVERMORE.
0134 PM Non-Tstm Wnd Gst 2 SSW Boulder 40.00N 105.26W
12/17/2025 M64 MPH Boulder CO Mesonet
Mesonet station CO040 Boulder US 36/Baseline
Rd.
0206 PM Non-Tstm Wnd Gst 1 SE Pine Grove 39.41N 105.33W
12/17/2025 M64 MPH Jefferson CO Trained Spotter
0325 PM Non-Tstm Wnd Gst 2 S Crisman 40.02N 105.36W
12/17/2025 M64 MPH Boulder CO Mesonet
Mesonet station BTAC2 Sugarloaf.
1100 AM Non-Tstm Wnd Gst 2 NNE Bailey 39.42N 105.46W
12/17/2025 M63 MPH Park CO Mesonet
Mesonet station GW6466 BAILEY.
0314 PM Non-Tstm Wnd Gst Virginia Dale 40.95N 105.35W
12/17/2025 M63 MPH Larimer CO Mesonet
Mesonet station CO036 Virginia Dale.
1132 AM Non-Tstm Wnd Gst Red Feather Lakes 40.80N 105.57W
12/17/2025 M62 MPH Larimer CO Mesonet
Mesonet station RFRC2 Red Feather RAWS.
1255 PM Non-Tstm Wnd Gst 1 ENE Berthoud Pass 39.80N 105.77W
12/17/2025 M62 MPH Grand CO AWOS
AWOS station K0CO Berthoud Pass.
0111 PM Non-Tstm Wnd Gst 6 SW Carr 40.84N 104.97W
12/17/2025 M62 MPH Larimer CO Mesonet
Mesonet station CO166 I-25 and Buckeye Rd.
0123 PM Non-Tstm Wnd Gst 2 NNE Natural Fort 40.99N 104.91W
12/17/2025 M62 MPH Weld CO Mesonet
Mesonet station CO041 I-25 at Wyoming
Border.
0128 PM Non-Tstm Wnd Gst 3 NE Boulder 40.06N 105.21W
12/17/2025 M62 MPH Boulder CO Mesonet
Mesonet station DW0417 Boulder.
0130 PM Non-Tstm Wnd Gst 2 NW Masonville 40.50N 105.22W
12/17/2025 M62 MPH Larimer CO Trained Spotter
0254 PM Non-Tstm Wnd Gst 2 N Mead 40.27N 104.98W
12/17/2025 M62 MPH Weld CO Mesonet
Mesonet station CO165 I-25 Berthoud Hill.
1255 PM Non-Tstm Wnd Gst 3 NW Livermore 40.83N 105.27W
12/17/2025 M61 MPH Larimer CO Mesonet
CoAgMet station CKP01 Cherokee Park.
0305 PM Non-Tstm Wnd Gst 1 NNW Boulder 40.04N 105.26W
12/17/2025 M61 MPH Boulder CO Mesonet
Mesonet station FW9328 Boulder.
1015 AM Non-Tstm Wnd Gst Nederland 39.96N 105.50W
12/17/2025 M60 MPH Boulder CO Mesonet
Mesonet station DVI07801 Nederland.
1145 AM Non-Tstm Wnd Gst 4 ESE Estes Park 40.36N 105.45W
12/17/2025 M60 MPH Larimer CO Mesonet
Mesonet station DW0774 Estes Park.
1235 PM Non-Tstm Wnd Gst 3 ESE Buckeye 40.81N 105.04W
12/17/2025 M60 MPH Larimer CO Mesonet
Mesonet station BEYC2 Buckeye.
1242 PM Non-Tstm Wnd Gst 3 W Lyons 40.22N 105.33W
12/17/2025 M60 MPH Boulder CO Mesonet
Mesonet station BCFC2 Boulder County Fire
Qd1.
0306 PM Non-Tstm Wnd Gst 1 S Greenland 39.18N 104.85W
12/17/2025 M60 MPH Douglas CO Mesonet
Mesonet station CO193 Greenland.
0145 PM Non-Tstm Wnd Dmg 2 SW Boulder 40.00N 105.27W
12/17/2025 Boulder CO Public
Large tree down.
0213 PM Non-Tstm Wnd Dmg 1 SSW Conifer 39.50N 105.31W
12/17/2025 Jefferson CO Public
One lodgepole pine snapped off 10 feet off
ground. Estimated to be 80 feet tall.
&&Local storm report, Dec 17, 4:34 PM MST, 2 hours 23 minutes before
Preliminary Local Storm Report...Summary
National Weather Service Denver CO
434 PM MST Wed Dec 17 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0330 PM Non-Tstm Wnd Gst 3 NW Marshall 39.98N 105.28W
12/17/2025 E109 MPH Boulder CO Mesonet
Updates previous peak non-tstm wnd gust
report from NCAR Mesa Lab. Time and wind
magnitude estimated from Gill Wind sensor.
0415 PM Non-Tstm Wnd Gst 3 SW Rocky Flats 39.87N 105.24W
12/17/2025 M102 MPH Jefferson CO Mesonet
Updates previous non-tstm wnd gst report
from 3 SW Rocky Flats. Mesonet station CO109
Rocky Flats Hwy 93 and 72.
0350 PM Non-Tstm Wnd Gst 1 NE Crisman 40.05N 105.35W
12/17/2025 M95 MPH Boulder CO Mesonet
Mesonet station EW4338 1 NE Crisman.
0154 PM Non-Tstm Wnd Gst 4 SSW Rocky Flats 39.84N 105.22W
12/17/2025 M93 MPH Jefferson CO Mesonet
Mesonet station TT867 Arvada.
0412 PM Non-Tstm Wnd Gst 1 S Boulder 40.02N 105.25W
12/17/2025 M91 MPH Boulder CO Public
0135 PM Non-Tstm Wnd Gst 1 ENE Boulder 40.03N 105.23W
12/17/2025 M87 MPH Boulder CO AWOS
AWOS station KBDU Boulder.
0209 PM Non-Tstm Wnd Gst 2 NW Rocky Flats 39.91N 105.23W
12/17/2025 M87 MPH Jefferson CO Mesonet
NRL Flatirons Campus (M2).
0255 PM Non-Tstm Wnd Gst 3 S Boulder 39.99N 105.27W
12/17/2025 M80 MPH Boulder CO Trained Spotter
0331 PM Non-Tstm Wnd Gst 4 SSW Lyons 40.17N 105.30W
12/17/2025 M78 MPH Boulder CO Mesonet
Mesonet station TT789 Heil Ranch.
0222 PM Non-Tstm Wnd Gst 3 S Pine Grove 39.38N 105.34W
12/17/2025 M74 MPH Jefferson CO Mesonet
Mesonet station BAWC2 Bailey.
0249 PM Non-Tstm Wnd Gst Floyd Hill 39.72N 105.41W
12/17/2025 M74 MPH Clear Creek CO Mesonet
Mesonet station CO071 I-70 Floyd Hill.
0223 PM Non-Tstm Wnd Gst 2 S Cheesman Reservoir 39.18N 105.27W
12/17/2025 M73 MPH Douglas CO Mesonet
Mesonet station CHRC2 Cheesman.
0350 PM Non-Tstm Wnd Gst 1 NNW Boulder 40.04N 105.26W
12/17/2025 M73 MPH Boulder CO Mesonet
Mesonet station FW9328 Boulder.
0349 PM Non-Tstm Wnd Gst 3 ESE Pinecliffe 39.91N 105.38W
12/17/2025 M72 MPH Boulder CO Mesonet
Mesonet station FW8937 Wondervu.
0415 PM Non-Tstm Wnd Gst 1 ENE Berthoud Pass 39.80N 105.77W
12/17/2025 M72 MPH Grand CO AWOS
AWOS station K0CO Berthoud Pass.
0158 PM Non-Tstm Wnd Gst 2 WNW Brookvale 39.64N 105.46W
12/17/2025 M71 MPH Clear Creek CO Mesonet
Mesonet station CEKC2 Corral Creek.
1240 PM Non-Tstm Wnd Gst 4 NNW White Ranch Open 39.87N 105.32W
12/17/2025 M70 MPH Jefferson CO Mesonet
Mesonet station 1925W Coal Creek Canyon.
0330 PM Non-Tstm Wnd Gst 2 S Winter Park 39.85N 105.78W
12/17/2025 M70 MPH Grand CO Mesonet
Mesonet station DDWPE Wp Eagle Wind.
0205 PM Non-Tstm Wnd Gst 3 E Pinewood Springs 40.28N 105.31W
12/17/2025 M69 MPH Larimer CO Mesonet
Mesonet station GW0895 Lyons.
0914 AM Non-Tstm Wnd Gst 3 SE Tolland 39.87N 105.55W
12/17/2025 M68 MPH Gilpin CO AWOS
AWOS station KC99 Dakota Hill.
1020 AM Non-Tstm Wnd Gst 4 ENE Nederland 39.99N 105.45W
12/17/2025 M68 MPH Boulder CO Mesonet
Mesonet station DW5338 Nederland.
0115 PM Non-Tstm Wnd Gst 3 NW Boulder 40.05N 105.29W
12/17/2025 M68 MPH Boulder CO Mesonet
Mesonet station BLD02 Boulder North West.
0120 PM Non-Tstm Wnd Gst 1 NNE Boulder 40.04N 105.24W
12/17/2025 M68 MPH Boulder CO Mesonet
NCAR Foothills Lab.
0239 PM Non-Tstm Wnd Gst 5 S Lyons 40.15N 105.27W
12/17/2025 M68 MPH Boulder CO Mesonet
Mesonet station EW8833 Longmont.
0300 PM Non-Tstm Wnd Gst Aspen Springs 39.83N 105.48W
12/17/2025 M67 MPH Gilpin CO Mesonet
Mesonet station CW5066 Aspen Springs.
0405 PM Non-Tstm Wnd Gst 2 SSW Laporte 40.59N 105.14W
12/17/2025 M66 MPH Larimer CO Mesonet
Mesonet station FCC01 Christman Air Field.
1001 AM Non-Tstm Wnd Gst 2 W Mishawaka 40.70N 105.41W
12/17/2025 M64 MPH Larimer CO Mesonet
Mesonet station GW4629 LIVERMORE.
0134 PM Non-Tstm Wnd Gst 2 SSW Boulder 40.00N 105.26W
12/17/2025 M64 MPH Boulder CO Mesonet
Mesonet station CO040 Boulder US 36/Baseline
Rd.
0206 PM Non-Tstm Wnd Gst 1 SE Pine Grove 39.41N 105.33W
12/17/2025 M64 MPH Jefferson CO Trained Spotter
0325 PM Non-Tstm Wnd Gst 2 S Crisman 40.02N 105.36W
12/17/2025 M64 MPH Boulder CO Mesonet
Mesonet station BTAC2 Sugarloaf.
0415 PM Non-Tstm Wnd Gst 3 WNW Loveland 40.43N 105.12W
12/17/2025 M64 MPH Larimer CO Mesonet
Mesonet station DW5856 Loveland.
1100 AM Non-Tstm Wnd Gst 2 NNE Bailey 39.42N 105.46W
12/17/2025 M63 MPH Park CO Mesonet
Mesonet station GW6466 BAILEY.
0314 PM Non-Tstm Wnd Gst Virginia Dale 40.95N 105.35W
12/17/2025 M63 MPH Larimer CO Mesonet
Mesonet station CO036 Virginia Dale.
0342 PM Non-Tstm Wnd Gst 3 W Lyons 40.22N 105.33W
12/17/2025 M63 MPH Boulder CO Mesonet
Mesonet station BCFC2 Boulder County Fire
Qd1.
1132 AM Non-Tstm Wnd Gst Red Feather Lakes 40.80N 105.57W
12/17/2025 M62 MPH Larimer CO Mesonet
Mesonet station RFRC2 Red Feather RAWS.
0111 PM Non-Tstm Wnd Gst 6 SW Carr 40.84N 104.97W
12/17/2025 M62 MPH Larimer CO Mesonet
Mesonet station CO166 I-25 and Buckeye Rd.
0123 PM Non-Tstm Wnd Gst 2 NNE Natural Fort 40.99N 104.91W
12/17/2025 M62 MPH Weld CO Mesonet
Mesonet station CO041 I-25 at Wyoming
Border.
0128 PM Non-Tstm Wnd Gst 3 NE Boulder 40.06N 105.21W
12/17/2025 M62 MPH Boulder CO Mesonet
Mesonet station DW0417 Boulder.
0130 PM Non-Tstm Wnd Gst 2 NW Masonville 40.50N 105.22W
12/17/2025 M62 MPH Larimer CO Trained Spotter
0254 PM Non-Tstm Wnd Gst 2 N Mead 40.27N 104.98W
12/17/2025 M62 MPH Weld CO Mesonet
Mesonet station CO165 I-25 Berthoud Hill.
0335 PM Non-Tstm Wnd Gst 3 ESE Buckeye 40.81N 105.04W
12/17/2025 M62 MPH Larimer CO Mesonet
Mesonet station BEYC2 Buckeye.
0345 PM Non-Tstm Wnd Gst 3 SSW Wallstreet 39.99N 105.41W
12/17/2025 M62 MPH Boulder CO Mesonet
Mesonet station DVI06650 Nederland.
1255 PM Non-Tstm Wnd Gst 3 NW Livermore 40.83N 105.27W
12/17/2025 M61 MPH Larimer CO Mesonet
CoAgMet station CKP01 Cherokee Park.
0350 PM Non-Tstm Wnd Gst 1 SW Evergreen 39.62N 105.36W
12/17/2025 M61 MPH Jefferson CO Mesonet
Mesonet station 1924W Alderfer Three Sisters
Park.
0415 PM Non-Tstm Wnd Gst 3 ESE Carter Lake 40.32N 105.16W
12/17/2025 M61 MPH Larimer CO Mesonet
Mesonet station GW2678 Berthoud.
1015 AM Non-Tstm Wnd Gst Nederland 39.96N 105.50W
12/17/2025 M60 MPH Boulder CO Mesonet
Mesonet station DVI07801 Nederland.
1145 AM Non-Tstm Wnd Gst 4 ESE Estes Park 40.36N 105.45W
12/17/2025 M60 MPH Larimer CO Mesonet
Mesonet station DW0774 Estes Park.
0306 PM Non-Tstm Wnd Gst 1 S Greenland 39.18N 104.85W
12/17/2025 M60 MPH Douglas CO Mesonet
Mesonet station CO193 Greenland.
0344 PM Non-Tstm Wnd Gst 3 NE Englewood 39.68N 104.96W
12/17/2025 M60 MPH Denver CO Mesonet
Mesonet station CO145 Denver I-25/University
Blvd.
0410 PM Non-Tstm Wnd Gst 2 WSW Golden 39.72N 105.25W
12/17/2025 M60 MPH Jefferson CO Mesonet
Mesonet station LOOC2 Lookout Mountain.
0145 PM Non-Tstm Wnd Dmg 2 SW Boulder 40.00N 105.27W
12/17/2025 Boulder CO Public
Large tree down.
0213 PM Non-Tstm Wnd Dmg 1 SSW Conifer 39.50N 105.31W
12/17/2025 Jefferson CO Public
One lodgepole pine snapped off 10 feet off
ground. Estimated to be 80 feet tall.
0354 PM Non-Tstm Wnd Dmg 3 E White Ranch Open Sp 39.82N 105.22W
12/17/2025 Jefferson CO Broadcast Media
Two or three power poles knocked down along
Highway 93 just north of West 64th Parkway.
&&Local storm report, Dec 17, 5:41 PM MST, 1 hour 16 minutes before
Preliminary Local Storm Report...Summary
National Weather Service Denver CO
541 PM MST Wed Dec 17 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0415 PM Non-Tstm Wnd Gst 3 SW Rocky Flats 39.87N 105.24W
12/17/2025 M102 MPH Jefferson CO Mesonet
Updates previous non-tstm wnd gst report
from 3 SW Rocky Flats. Mesonet station CO109
Rocky Flats Hwy 93 and 72.
0424 PM Non-Tstm Wnd Gst 4 SSW Rocky Flats 39.84N 105.22W
12/17/2025 M98 MPH Jefferson CO Mesonet
Mesonet station TT867 Arvada.
0350 PM Non-Tstm Wnd Gst 1 NE Crisman 40.05N 105.35W
12/17/2025 M95 MPH Boulder CO Mesonet
Mesonet station EW4338 1 NE Crisman.
0412 PM Non-Tstm Wnd Gst 1 S Boulder 40.02N 105.25W
12/17/2025 M91 MPH Boulder CO Public
0411 PM Non-Tstm Wnd Gst 2 NW Rocky Flats 39.91N 105.23W
12/17/2025 M89 MPH Jefferson CO Mesonet
Updates previous non-tstm wnd gst report
from 2 NW Rocky Flats. NLR Flatirons Campus
(M2).
0135 PM Non-Tstm Wnd Gst 1 ENE Boulder 40.03N 105.23W
12/17/2025 M87 MPH Boulder CO AWOS
AWOS station KBDU Boulder.
0435 PM Non-Tstm Wnd Gst 1 ENE Berthoud Pass 39.80N 105.77W
12/17/2025 M85 MPH Grand CO AWOS
AWOS station K0CO Berthoud Pass.
0415 PM Non-Tstm Wnd Gst 2 S Winter Park 39.85N 105.78W
12/17/2025 M84 MPH Grand CO Mesonet
Mesonet station DDWPE Wp Eagle Wind.
0452 PM Non-Tstm Wnd Gst 2 SW Broomfield 39.90N 105.10W
12/17/2025 M83 MPH Jefferson CO AWOS
AWOS station KBJC Broomfield Rocky Mtn Metro
Airport.
0415 PM Non-Tstm Wnd Gst 2 NNW Marshall 39.97N 105.25W
12/17/2025 M82 MPH Boulder CO Mesonet
Mesonet station BLD01 Boulder Fairview.
0255 PM Non-Tstm Wnd Gst 3 S Boulder 39.99N 105.27W
12/17/2025 M80 MPH Boulder CO Trained Spotter
0423 PM Non-Tstm Wnd Gst 2 S Cheesman Reservoir 39.18N 105.27W
12/17/2025 M80 MPH Douglas CO Mesonet
Mesonet station CHRC2 Cheesman.
0331 PM Non-Tstm Wnd Gst 4 SSW Lyons 40.17N 105.30W
12/17/2025 M78 MPH Boulder CO Mesonet
Mesonet station TT789 Heil Ranch.
0512 PM Non-Tstm Wnd Gst 4 SE Keystone 39.56N 105.91W
12/17/2025 M78 MPH Summit CO Mesonet
Mesonet station GW5575 DILLON.
0435 PM Non-Tstm Wnd Gst 3 ESE Buckeye 40.81N 105.04W
12/17/2025 M76 MPH Larimer CO Mesonet
Mesonet station BEYC2 Buckeye.
0222 PM Non-Tstm Wnd Gst 3 S Pine Grove 39.38N 105.34W
12/17/2025 M74 MPH Jefferson CO Mesonet
Mesonet station BAWC2 Bailey.
0249 PM Non-Tstm Wnd Gst Floyd Hill 39.72N 105.41W
12/17/2025 M74 MPH Clear Creek CO Mesonet
Mesonet station CO071 I-70 Floyd Hill.
0350 PM Non-Tstm Wnd Gst 1 NNW Boulder 40.04N 105.26W
12/17/2025 M73 MPH Boulder CO Mesonet
Mesonet station FW9328 Boulder.
0425 PM Non-Tstm Wnd Gst 2 S Crisman 40.02N 105.36W
12/17/2025 M73 MPH Boulder CO Mesonet
Mesonet station BTAC2 Sugarloaf.
0349 PM Non-Tstm Wnd Gst 3 ESE Pinecliffe 39.91N 105.38W
12/17/2025 M72 MPH Boulder CO Mesonet
Mesonet station FW8937 Wondervu.
0158 PM Non-Tstm Wnd Gst 2 WNW Brookvale 39.64N 105.46W
12/17/2025 M71 MPH Clear Creek CO Mesonet
Mesonet station CEKC2 Corral Creek.
0435 PM Non-Tstm Wnd Gst 3 SSW Niwot 40.06N 105.17W
12/17/2025 M71 MPH Boulder CO Mesonet
Mesonet station GW4351 BOULDER.
1240 PM Non-Tstm Wnd Gst 4 NNW White Ranch Open 39.87N 105.32W
12/17/2025 M70 MPH Jefferson CO Mesonet
Mesonet station 1925W Coal Creek Canyon.
0205 PM Non-Tstm Wnd Gst 3 E Pinewood Springs 40.28N 105.31W
12/17/2025 M69 MPH Larimer CO Mesonet
Mesonet station GW0895 Lyons.
0914 AM Non-Tstm Wnd Gst 3 SE Tolland 39.87N 105.55W
12/17/2025 M68 MPH Gilpin CO AWOS
AWOS station KC99 Dakota Hill.
1020 AM Non-Tstm Wnd Gst 4 ENE Nederland 39.99N 105.45W
12/17/2025 M68 MPH Boulder CO Mesonet
Mesonet station DW5338 Nederland.
0120 PM Non-Tstm Wnd Gst 1 NNE Boulder 40.04N 105.24W
12/17/2025 M68 MPH Boulder CO Mesonet
NCAR Foothills Lab.
0239 PM Non-Tstm Wnd Gst 5 S Lyons 40.15N 105.27W
12/17/2025 M68 MPH Boulder CO Mesonet
Mesonet station EW8833 Longmont.
0415 PM Non-Tstm Wnd Gst 3 NW Boulder 40.05N 105.29W
12/17/2025 M68 MPH Boulder CO Mesonet
Mesonet station BLD02 Boulder North West.
0437 PM Non-Tstm Wnd Gst 2 NNE Natural Fort 40.99N 104.91W
12/17/2025 M68 MPH Weld CO Mesonet
Mesonet station CO041 I-25 at Wyoming
Border.
0300 PM Non-Tstm Wnd Gst Aspen Springs 39.83N 105.48W
12/17/2025 M67 MPH Gilpin CO Mesonet
Mesonet station CW5066 Aspen Springs.
0430 PM Non-Tstm Wnd Gst 3 WNW Loveland 40.43N 105.12W
12/17/2025 M67 MPH Larimer CO Mesonet
Mesonet station DW5856 Loveland.
0436 PM Non-Tstm Wnd Gst 1 N Georgetown 39.73N 105.69W
12/17/2025 M67 MPH Clear Creek CO Mesonet
Mesonet station CO162 I-70 Georgetown Lake.
0510 PM Non-Tstm Wnd Gst 2 WSW Golden 39.72N 105.25W
12/17/2025 M67 MPH Jefferson CO Mesonet
Mesonet station LOOC2 Lookout Mountain.
0405 PM Non-Tstm Wnd Gst 2 SSW Laporte 40.59N 105.14W
12/17/2025 M66 MPH Larimer CO Mesonet
Mesonet station FCC01 Christman Air Field.
0456 PM Non-Tstm Wnd Gst 2 N Mead 40.27N 104.98W
12/17/2025 M66 MPH Weld CO Mesonet
Mesonet station CO165 I-25 Berthoud Hill.
0435 PM Non-Tstm Wnd Gst 6 SW Carr 40.84N 104.97W
12/17/2025 M65 MPH Larimer CO Mesonet
Mesonet station CO166 I-25 and Buckeye Rd.
1001 AM Non-Tstm Wnd Gst 2 W Mishawaka 40.70N 105.41W
12/17/2025 M64 MPH Larimer CO Mesonet
Mesonet station GW4629 LIVERMORE.
0134 PM Non-Tstm Wnd Gst 2 SSW Boulder 40.00N 105.26W
12/17/2025 M64 MPH Boulder CO Mesonet
Mesonet station CO040 Boulder US 36/Baseline
Rd.
0206 PM Non-Tstm Wnd Gst 1 SE Pine Grove 39.41N 105.33W
12/17/2025 M64 MPH Jefferson CO Trained Spotter
1100 AM Non-Tstm Wnd Gst 2 NNE Bailey 39.42N 105.46W
12/17/2025 M63 MPH Park CO Mesonet
Mesonet station GW6466 BAILEY.
0314 PM Non-Tstm Wnd Gst Virginia Dale 40.95N 105.35W
12/17/2025 M63 MPH Larimer CO Mesonet
Mesonet station CO036 Virginia Dale.
0342 PM Non-Tstm Wnd Gst 3 W Lyons 40.22N 105.33W
12/17/2025 M63 MPH Boulder CO Mesonet
Mesonet station BCFC2 Boulder County Fire
Qd1.
1132 AM Non-Tstm Wnd Gst Red Feather Lakes 40.80N 105.57W
12/17/2025 M62 MPH Larimer CO Mesonet
Mesonet station RFRC2 Red Feather RAWS.
0128 PM Non-Tstm Wnd Gst 3 NE Boulder 40.06N 105.21W
12/17/2025 M62 MPH Boulder CO Mesonet
Mesonet station DW0417 Boulder.
0130 PM Non-Tstm Wnd Gst 2 NW Masonville 40.50N 105.22W
12/17/2025 M62 MPH Larimer CO Trained Spotter
0345 PM Non-Tstm Wnd Gst 3 SSW Wallstreet 39.99N 105.41W
12/17/2025 M62 MPH Boulder CO Mesonet
Mesonet station DVI06650 Nederland.
1255 PM Non-Tstm Wnd Gst 3 NW Livermore 40.83N 105.27W
12/17/2025 M61 MPH Larimer CO Mesonet
CoAgMet station CKP01 Cherokee Park.
0350 PM Non-Tstm Wnd Gst 1 SW Evergreen 39.62N 105.36W
12/17/2025 M61 MPH Jefferson CO Mesonet
Mesonet station 1924W Alderfer Three Sisters
Park.
0415 PM Non-Tstm Wnd Gst 3 ESE Carter Lake 40.32N 105.16W
12/17/2025 M61 MPH Larimer CO Mesonet
Mesonet station GW2678 Berthoud.
0430 PM Non-Tstm Wnd Gst 1 WSW Louisville 39.96N 105.15W
12/17/2025 M61 MPH Boulder CO Mesonet
Mesonet station FW0288 Louisville.
1015 AM Non-Tstm Wnd Gst Nederland 39.96N 105.50W
12/17/2025 M60 MPH Boulder CO Mesonet
Mesonet station DVI07801 Nederland.
1145 AM Non-Tstm Wnd Gst 4 ESE Estes Park 40.36N 105.45W
12/17/2025 M60 MPH Larimer CO Mesonet
Mesonet station DW0774 Estes Park.
0306 PM Non-Tstm Wnd Gst 1 S Greenland 39.18N 104.85W
12/17/2025 M60 MPH Douglas CO Mesonet
Mesonet station CO193 Greenland.
0344 PM Non-Tstm Wnd Gst 3 NE Englewood 39.68N 104.96W
12/17/2025 M60 MPH Denver CO Mesonet
Mesonet station CO145 Denver I-25/University
Blvd.
0435 PM Non-Tstm Wnd Gst 3 NW Campion 40.38N 105.15W
12/17/2025 M60 MPH Larimer CO Mesonet
Mesonet station AR167 Berthoud.
0453 PM Non-Tstm Wnd Gst 2 SSW Broomfield 39.90N 105.08W
12/17/2025 M60 MPH Jefferson CO Mesonet
Mesonet station CO168 Westminster US 36.
0145 PM Non-Tstm Wnd Dmg 2 SW Boulder 40.00N 105.27W
12/17/2025 Boulder CO Public
Large tree down.
0213 PM Non-Tstm Wnd Dmg 1 SSW Conifer 39.50N 105.31W
12/17/2025 Jefferson CO Public
One lodgepole pine snapped off 10 feet off
ground. Estimated to be 80 feet tall.
0354 PM Non-Tstm Wnd Dmg 1 NE Golden 39.75N 105.21W
12/17/2025 Jefferson CO Broadcast Media
Tree blown down onto power lines.
0354 PM Non-Tstm Wnd Dmg 3 E White Ranch Open Sp 39.82N 105.22W
12/17/2025 Jefferson CO Broadcast Media
Two or three power poles knocked down along
Highway 93 just north of West 64th Parkway.
0434 PM Non-Tstm Wnd Dmg 1 SW Boulder 40.01N 105.27W
12/17/2025 Boulder CO Public
Multiple trees down on CU Boulder campus.
&&The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 18, 2:31 AM MST | Red Flag Warning | BOU | Logan, Morgan, Phillips, Sedgwick, Washington, Weld | 14 hr |
| Dec 18, 2:44 PM MST | Red Flag Warning | BOU | Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 7 more | 33 hr |
Nearby
High Wind Warnings in Colorado, 2025Every high wind warning in 2025
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.