Alert archive / Colorado / Red Flag Warnings in 2025
Red Flag Warning 30, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this red flag warning at Dec 18, 2025, 2:31 AM MST for 6 counties in Colorado. It took effect at Dec 18, 2025, 5:00 AM MST. It was in force for 12 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Dec 18, 2025, 2:31 AM MST (09:31 UTC)
- In effect from
- Dec 18, 2025, 5:00 AM MST
- Expired
- Dec 18, 2025, 5:00 PM MST
- In force
- 12 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO
The radar
The Denver radar (KFTG), 139 km from the middle of the area, began a volume at 09:29 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.
The nearest sounding before it
Rapid City, SD (KUNR), launched 00:00Z, 9.5 hours before the alert went out and 398 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
- 2242 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 227 m²/s²
- 0-3 km storm-relative helicity
- 260 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
828 WWUS85 KBOU 180931 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 231 AM MST Thu Dec 18 2025 ...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. COZ242-182215- /O.NEW.KBOU.FW.W.0030.251218T1200Z-251219T0000Z/ /O.EXB.KBOU.FW.A.0017.251219T1700Z-251220T0700Z/ Northeast Weld County- 231 AM MST Thu Dec 18 2025 ...RED FLAG WARNING IN EFFECT UNTIL 5 PM MST THIS AFTERNOON FOR WIND AND LOW RELATIVE HUMIDITY... ...FIRE WEATHER WATCH IN EFFECT FRIDAY FOR WIND AND LOW RELATIVE HUMIDITY... 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. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$ COZ244-248>251-182215- /O.NEW.KBOU.FW.W.0030.251218T1200Z-251219T0000Z/ Morgan County-Logan County-Washington County-Sedgwick County- Phillips County- 231 AM MST Thu Dec 18 2025 ...RED FLAG WARNING IN EFFECT UNTIL 5 PM MST THIS AFTERNOON FOR WIND AND LOW RELATIVE HUMIDITY... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect until 5 PM MST this afternoon. * AFFECTED AREA...Fire Weather Zones 244, 248, 249, 250 and 251. * TIMING...Until 5 PM MST this afternoon. * WINDS...Northwest winds 25 to 35 mph with gusts 55 to 65 mph. * RELATIVE HUMIDITY...15 to 20 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ215-216-241-243-245>247-182215- /O.EXB.KBOU.FW.A.0017.251219T1700Z-251220T0700Z/ 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- Elbert/Central and East Douglas Counties Above 6000 Feet- Central and South Weld 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- 231 AM MST Thu Dec 18 2025 ...FIRE WEATHER WATCH IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY... 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. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$ COZ238>240-182215- /O.EXT.KBOU.FW.A.0017.251219T1700Z-251220T0700Z/ Larimer County Below 6000 Feet/Northwest Weld County- Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- 231 AM MST Thu Dec 18 2025 ...FIRE WEATHER WATCH NOW IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY... * AFFECTED AREA...Fire Weather Zones 238, 239 and 240. * TIMING...From Friday morning through Friday evening. * WINDS...West 25 to 35 mph with gusts 70 to 80 mph near the base of the foothills. West 15 to 25 mph with gusts up to 45 mph closer to the I-25 corridor. * RELATIVE HUMIDITY...As low as 10 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$ Rodriguez
2 follow-up statements
633 WWUS85 KBOU 182144 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 244 PM MST Thu Dec 18 2025 ...CRITICAL FIRE WEATHER CONDITIONS FRIDAY... Critical fire weather conditions over the northeast plains will gradually ease into this evening. Strong winds will redevelop in the foothills overnight, with high winds spreading slowly east across the nearby adjacent plains west of I-25 through the afternoon. Extremely high wind gusts of 85-100 mph combined with humidities dropping into the 10-20 percent range will create potential for fast moving wildfires, should any new starts occur. Winds toward I-25 and eastward will be slower to develop, and also speeds will be considerably lighter. That said, gusts of 25-40 mph are still expected to combine with very low humidity and cured grasses to support critical fire weather conditions. Areas farther east into eastern Adams, Arapahoe, Elbert, and Lincoln counties have more uncertainty if those winds even develop, so those locations remain under a Fire Weather Watch. Such conditions may be a longer duration than usual, with potential for low humidity to extend well into the evening hours. COZ242-190545- /O.UPG.KBOU.FW.A.0017.251219T1700Z-251220T0700Z/ /O.NEW.KBOU.FW.W.0031.251219T1700Z-251220T0700Z/ /O.CON.KBOU.FW.W.0030.000000T0000Z-251219T0000Z/ Northeast Weld County- 244 PM MST Thu Dec 18 2025 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON FOR WIND AND LOW RELATIVE HUMIDITY FOR NORTHERN WELD COUNTY... ...RED FLAG WARNING IN EFFECT FROM 10 AM FRIDAY TO MIDNIGHT MST FRIDAY NIGHT FOR WIND AND LOW RELATIVE HUMIDITY FOR NORTHERN WELD COUNTY... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 10 AM Friday to midnight MST Friday night. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zone 242. * TIMING...For the first Red Flag Warning, until 5 PM MST this afternoon. For the second Red Flag Warning, from 10 AM Friday to midnight MST Friday night. * WINDS...Southwest 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 15 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. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ215-216-190545- /O.UPG.KBOU.FW.A.0017.251219T1700Z-251220T0700Z/ /O.NEW.KBOU.FW.W.0031.251219T1200Z-251220T0700Z/ Larimer and Boulder Counties Between 6000 and 9000 Feet- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- 244 PM MST Thu Dec 18 2025 ...RED FLAG WARNING IN EFFECT FROM 5 AM FRIDAY TO MIDNIGHT MST FRIDAY NIGHT FOR WIND AND LOW RELATIVE HUMIDITY FOR THE FRONT RANGE FOOTHILLS... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 5 AM Friday to midnight MST Friday night. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 215 and 216. * TIMING...From 5 AM Friday to midnight MST Friday night. * WINDS...West 35 to 50 mph with gusts of 80-100 mph. * RELATIVE HUMIDITY...As low as 12 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a fast moving wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ238>241-243-190545- /O.UPG.KBOU.FW.A.0017.251219T1700Z-251220T0700Z/ /O.NEW.KBOU.FW.W.0031.251219T1700Z-251220T0700Z/ 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- 244 PM MST Thu Dec 18 2025 ...RED FLAG WARNING IN EFFECT FROM 10 AM FRIDAY TO MIDNIGHT MST FRIDAY NIGHT FOR WIND AND LOW RELATIVE HUMIDITY FOR THE FRONT RANGE I-25 URBAN CORRIDOR... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 10 AM Friday to midnight MST Friday night. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 238, 239, 240, 241 and 243. * TIMING...From 10 AM Friday to midnight MST Friday night. * WINDS...West 20 to 35 mph, with gusts up to 80 mph or more immediately next to the foothills. Gusts closer to 40 mph along and east of I-25. * RELATIVE HUMIDITY...As low as 8 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a fast moving wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ244-248>251-190000- /O.CON.KBOU.FW.W.0030.000000T0000Z-251219T0000Z/ Morgan County-Logan County-Washington County-Sedgwick County- Phillips County- 244 PM MST Thu Dec 18 2025 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON FOR WIND AND LOW RELATIVE HUMIDITY FOR THE NORTHEAST PLAINS OF COLORADO.. * AFFECTED AREA...Fire Weather Zones 244, 248, 249, 250 and 251. * TIMING...Until 5 PM MST this afternoon. * WINDS...North 20 to 30 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 15 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ245>247-190545- /O.CON.KBOU.FW.A.0017.251219T1700Z-251220T0700Z/ 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- 244 PM MST Thu Dec 18 2025 ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR PORTIONS OF EAST CENTRAL COLORADO EAST OF DENVER TOWARD LIMON... * AFFECTED AREA...Fire Weather Zones 245, 246 and 247. * TIMING...From Friday morning through Friday evening. * WINDS...Southwest 10 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 14 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. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$
618 WWUS85 KBOU 190008 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 508 PM MST Thu Dec 18 2025 ...THIS IS A PARTICULARLY DANGEROUS SITUATION FOR IN AND IMMEDIATELY ADJACENT TO THE FOOTHILLS, BETWEEN 5500 AND 9000 FEET, FOR BOULDER AND JEFFERSON COUNTIES ON FRIDAY... Strong west winds, sustained 45-55 mph with gusts upwards of 85-105 mph, are expected in the foothills of Boulder and Jefferson Counties beginning early Friday morning. Relative humidity values are expected to drop into the low teens, possibly upper single digits. While Red Flag conditions, critical fire weather, are expected across a larger area in northern Colorado, the most extreme conditions are expected to be along Highway 93 from Jefferson County into Boulder County and along US-36 north of Boulder to the Larimer County line and westward. There will be a high potential for fast moving wildfires, should any new starts occur. Winds toward I-25 and eastward will be slower to develop, and also speeds will be considerably lighter. That said, gusts of 25-40 mph are still expected to combine with very low humidity and cured grasses to support critical fire weather conditions. Areas farther east into eastern Adams, Arapahoe, Elbert, and Lincoln counties have more uncertainty if those winds even develop, so those locations remain under a Fire Weather Watch. Such conditions may be a longer duration than usual, with potential for low humidity to extend well into the evening hours. COZ242-191300- /O.EXP.KBOU.FW.W.0030.000000T0000Z-251219T0000Z/ /O.CON.KBOU.FW.W.0031.251219T1700Z-251220T0700Z/ Northeast Weld County- 508 PM MST Thu Dec 18 2025 ...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM FRIDAY TO MIDNIGHT MST FRIDAY NIGHT FOR WIND AND LOW RELATIVE HUMIDITY FOR NORTHERN WELD COUNTY... ...RED FLAG WARNING TODAY HAS EXPIRED FOR WIND AND LOW RELATIVE HUMIDITY... * AFFECTED AREA...Fire Weather Zone 242. * TIMING...From 10 AM Friday to midnight MST Friday night. * WINDS...Southwest 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 15 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. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ244-248>251-190115- /O.EXP.KBOU.FW.W.0030.000000T0000Z-251219T0000Z/ Morgan County-Logan County-Washington County-Sedgwick County- Phillips County- 508 PM MST Thu Dec 18 2025 ...RED FLAG WARNING HAS EXPIRED FOR WIND AND LOW RELATIVE HUMIDITY FOR THE NORTHEAST PLAINS OF COLORADO... Winds have decreased sufficiently to allow the Red Flag Warning to expire. $$ COZ215-216-191300- /O.CON.KBOU.FW.W.0031.251219T1200Z-251220T0700Z/ Larimer and Boulder Counties Between 6000 and 9000 Feet- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- 508 PM MST Thu Dec 18 2025 ...RED FLAG WARNING FOR A PARTICULARLY DANGEROUS SITUATION REMAINS IN EFFECT FROM 5 AM FRIDAY TO MIDNIGHT MST FRIDAY NIGHT FOR WIND AND LOW RELATIVE HUMIDITY FOR THE FRONT RANGE FOOTHILLS... * AFFECTED AREA...Fire Weather Zones 215 and 216. * TIMING...From 5 AM Friday to midnight MST Friday night. * WINDS...West 35 to 50 mph with gusts up to 85-105 mph. * RELATIVE HUMIDITY...As low as 12 percent. * IMPACTS...Conditions will be favorable for extremely rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... This is a Particularly Dangerous Situation that poses a significant threat to life and property in the event of a wildfire start. Residents are urged to assemble an emergency supply kit and know their evacuation routes. In some cases, safe and timely evacuation may not be possible should a fire approach. Have multiple ways to receive instructions from emergency services, and evacuate if ordered to or if a fire threatens. && $$ COZ238-240-241-243-191300- /O.CON.KBOU.FW.W.0031.251219T1700Z-251220T0700Z/ Larimer County Below 6000 Feet/Northwest Weld 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- 508 PM MST Thu Dec 18 2025 ...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM FRIDAY TO MIDNIGHT MST FRIDAY NIGHT FOR WIND AND LOW RELATIVE HUMIDITY FOR THE FRONT RANGE I-25 URBAN CORRIDOR... * AFFECTED AREA...Fire Weather Zones 238, 240, 241 and 243. * TIMING...From 10 AM Friday to midnight MST Friday night. * WINDS...West 15 to 25 mph with gusts up to 60 mph possible west of I-25, and gusts to 40 mph possible along and east of I-25. * RELATIVE HUMIDITY...As low as 12 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. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ239-191300- /O.CON.KBOU.FW.W.0031.251219T1700Z-251220T0700Z/ Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- 508 PM MST Thu Dec 18 2025 ...RED FLAG WARNING FOR A PARTICULARLY DANGEROUS SITUATION REMAINS IN EFFECT FROM 10 AM FRIDAY TO MIDNIGHT MST FRIDAY NIGHT FOR WIND AND LOW RELATIVE HUMIDITY FOR ABOVE 5500 FEET IMMEDIATELY ADJACENT TO THE FOOTHILLS OF BOULDER AND JEFFERSON COUNTIES... * AFFECTED AREA...Fire Weather Zone 239. * TIMING...From 10 AM Friday to midnight MST Friday night. * WINDS...West 30 to 40 mph with gusts up to 80 mph or more immediately next to the foothills. * RELATIVE HUMIDITY...As low as 8 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... This is a Particularly Dangerous Situation that poses a significant threat to life and property in the event of a wildfire start. Residents are urged to assemble an emergency supply kit and know their evacuation routes. In some cases, safe and timely evacuation may not be possible should a fire approach. Have multiple ways to receive instructions from emergency services, and evacuate if ordered to or if a fire threatens. && $$ COZ245>247-191300- /O.CON.KBOU.FW.A.0017.251219T1700Z-251220T0700Z/ 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- 508 PM MST Thu Dec 18 2025 ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR PORTIONS OF EAST CENTRAL COLORADO EAST OF DENVER TOWARD LIMON... * AFFECTED AREA...Fire Weather Zones 245, 246 and 247. * TIMING...From Friday morning through Friday evening. * WINDS...Southwest 10 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 14 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. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$
What forecasters said that day
The local office's own words before this red flag 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 red flag warning went out at Dec 17, 10:31 PM MST, 4 hours earlier. Its key messages:
- Strong winds shifting across the plains, with travel impacts due to strong winds and areas of blowing dust tonight. Some relaxation of the winds near the foothills, but very high winds with gusts to ~100 mph possible will continue across mountains and higher slopes of the foothills overnight.
- Snow and blowing snow with hazardous travel conditions will wind down by midnight.
- 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, 10:31 PM MST, 4 hours before
Area Forecast Discussion National Weather Service Denver/Boulder CO 1031 PM MST Wed Dec 17 2025 .KEY MESSAGES... - Strong winds shifting across the plains, with travel impacts due to strong winds and areas of blowing dust tonight. Some relaxation of the winds near the foothills, but very high winds with gusts to ~100 mph possible will continue across mountains and higher slopes of the foothills overnight. - Snow and blowing snow with hazardous travel conditions will wind down by midnight. - 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. && .UPDATE... Issued at 844 PM MST Wed Dec 17 2025 Made a few changes this evening with stronger winds over the plains, resulting in areas of blowing dust and hazardous travel conditions. We earlier extended the High Wind Warning for the Fort Collins to Wyoming border area til midnight to account for the northwest winds blasting across the border, while also adding Limon to the High Wind warning as shower enhancement was aiding frontal winds. There have been a few impressive gusts over 70 mph on the northeast plains this evening! Winds had settled down (but still gusty) close to the foothills, so the High Wind warning for Boulder was allowed to expire at 7 pm. Meanwhile, with the mid/upper level jet core ripping across the mountains we've seen a few of the passes and higher mountains blast to over 100 mph. Those types of winds will likely remain overnight with the core of 600 mb winds near 80 kts holding in place. So any sort of amplification will bring higher winds. Higher foothills will also see a few blasts of these magnitudes given developing mountain top stable layer overnight. Also, a few light showers spreading onto the plains this evening but those and the mountain snow/blowing snow will be diminishing rather quickly by midnight as much drier air arrives. && .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 /06Z TAFS through 06Z Friday/... Issued at 1028 PM MST Wed Dec 17 2025 Gusty NW winds expected to continue for the terminals through sunrise, with weaker winds expected Thursday morning. A Longmont anticyclone is expected to develop by the afternoon, favoring light north to northeast winds for KDEN/KAPA in particular. Winds should then shift to the SE before a return to drainage flow in the evening. All terminals are expected to see VFR conditions through the TAF period past 07Z today. && .FIRE WEATHER... Issued at 844 PM MST Wed Dec 17 2025 Humidities have increased sufficiently to allow Red Flag Warnings to expire at 6 pm earlier this evening. Still strong winds and elevated fire weather conditions through the night, however. 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. High Wind Warning until midnight MST tonight for COZ038-042-044- 046-048-049. 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 from 5 AM to noon MST Thursday for COZ050-051. && UPDATE...20 DISCUSSION...MAI/AP AVIATION...BRQ FIRE WEATHER...MAI/AP
Hazardous weather outlook, Dec 17, 10:44 AM MST, 15 hours 47 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, 9:17 PM MST, 5 hours 14 minutes before
Preliminary Local Storm Report...Summary
National Weather Service Denver CO
917 PM MST Wed Dec 17 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0818 PM Non-Tstm Wnd Gst 4 SE Keystone 39.56N 105.91W
12/17/2025 M110 MPH Summit CO Mesonet
Mesonet station GW5575 DILLON.
0330 PM Non-Tstm Wnd Gst 3 NW Marshall 39.98N 105.28W
12/17/2025 E109 MPH Boulder CO Mesonet
NCAR Mesa Lab. Time and wind magnitude
estimated from Gill wind sensor.
0630 PM Non-Tstm Wnd Gst 2 S Winter Park 39.85N 105.78W
12/17/2025 M103 MPH Grand CO Mesonet
Mesonet station DDWPE Wp Eagle Wind.
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.
0715 PM Non-Tstm Wnd Gst 1 ENE Berthoud Pass 39.80N 105.77W
12/17/2025 M102 MPH Grand CO AWOS
AWOS station K0CO Berthoud Pass.
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).
0830 PM Non-Tstm Wnd Gst 1 NNW Akron 40.17N 103.22W
12/17/2025 M89 MPH Washington CO AWOS
AWOS station KAKO Akron.
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.
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.
0718 PM Non-Tstm Wnd Gst 6 SW Carr 40.84N 104.97W
12/17/2025 M82 MPH Larimer CO Mesonet
Mesonet station CO166 I-25 and Buckeye Rd.
0735 PM Non-Tstm Wnd Gst 3 ESE Buckeye 40.81N 105.04W
12/17/2025 M81 MPH Larimer CO Mesonet
Mesonet station BEYC2 Buckeye.
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.
0717 PM Non-Tstm Wnd Gst 2 ESE Sterling 40.62N 103.17W
12/17/2025 M78 MPH Logan CO Mesonet
Mesonet station CO035 I-76 Sterling.
0755 PM Non-Tstm Wnd Gst Fort Morgan Airport 40.33N 103.80W
12/17/2025 M77 MPH Morgan CO AWOS
AWOS station KFMM Fort Morgan.
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.
0734 PM Non-Tstm Wnd Gst 3 SE Tolland 39.87N 105.55W
12/17/2025 M74 MPH Gilpin CO AWOS
AWOS station KC99 Dakota Hill.
0749 PM Non-Tstm Wnd Gst 2 W Mishawaka 40.70N 105.41W
12/17/2025 M74 MPH Larimer CO Mesonet
Mesonet station GW4629 LIVERMORE.
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.
0746 PM Non-Tstm Wnd Gst 11 NNE Kremmling 40.21N 106.33W
12/17/2025 M73 MPH Grand CO Mesonet
Mesonet station GSPC2 Gunsight.
0833 PM Non-Tstm Wnd Gst 1 ESE Akron 40.16N 103.20W
12/17/2025 M73 MPH Washington CO Mesonet
Mesonet station EW7755 Akron.
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.
0810 PM Non-Tstm Wnd Gst 2 ENE Wiggins 40.25N 104.04W
12/17/2025 M72 MPH Morgan CO Mesonet
Mesonet station CO039 Wiggins Bijou Creek.
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.
0630 PM Non-Tstm Wnd Gst 5 SW Elkdale 39.99N 105.95W
12/17/2025 M71 MPH Grand CO Mesonet
Mesonet station DDYMC Ymca.
0633 PM Non-Tstm Wnd Gst 1 NNW Briggsdale 40.64N 104.33W
12/17/2025 M71 MPH Weld CO Mesonet
Mesonet station CO043 Briggsdale.
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.
0607 PM Non-Tstm Wnd Gst 4 NNW Keystone 39.66N 105.98W
12/17/2025 M70 MPH Summit CO Mesonet
Mesonet station CO159 I-70 Silverthorne 6 E.
0745 PM Non-Tstm Wnd Gst 2 SSW Laporte 40.59N 105.14W
12/17/2025 M70 MPH Larimer CO Mesonet
Mesonet station FCC01 Christman Air Field.
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.
0734 PM Non-Tstm Wnd Gst 4 NNW Buckley AFB 39.76N 104.77W
12/17/2025 M69 MPH Adams CO Mesonet
Mesonet station CO218 Aurora I-70/Tower Rd.
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.
0759 PM Non-Tstm Wnd Gst 1 WSW Lawson 39.76N 105.64W
12/17/2025 M68 MPH Clear Creek CO Mesonet
Mesonet station CO147 I-70 Empire Junction.
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.
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.
0608 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.
0843 PM Non-Tstm Wnd Gst 4 WNW Johnstown 40.35N 104.98W
12/17/2025 M67 MPH Larimer CO Mesonet
Mesonet station CO223 025s25325rws1rhs - 1.0
Mile S Of.
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.
0627 PM Non-Tstm Wnd Gst 1 ENE Tabernash 39.99N 105.83W
12/17/2025 M66 MPH Grand CO Mesonet
Mesonet station CO139 US 40 At Fraser Flats.
0726 PM Non-Tstm Wnd Gst 2 SE Denver Intl Airpor 39.85N 104.65W
12/17/2025 M66 MPH Denver CO ASOS
ASOS station KDEN Denver Intl Airport.
0807 PM Non-Tstm Wnd Gst 2 NNW Briggsdale 40.65N 104.34W
12/17/2025 M66 MPH Weld CO Mesonet
Mesonet station TT567 Crow Creek.
0831 PM Non-Tstm Wnd Gst 1 WNW Dillon 39.63N 106.06W
12/17/2025 M66 MPH Summit CO Mesonet
Mesonet station CO069 I-70 Silverthorne
East.
0850 PM Non-Tstm Wnd Gst Virginia Dale 40.95N 105.35W
12/17/2025 M66 MPH Larimer CO Mesonet
Mesonet station CO036 Virginia Dale.
0627 PM Non-Tstm Wnd Gst 12 WSW Tabernash 39.89N 106.04W
12/17/2025 M65 MPH Grand CO Mesonet
Mesonet station KSEC2 Keyser Ridge.
0728 PM Non-Tstm Wnd Gst 1 W Masters 40.29N 104.26W
12/17/2025 M65 MPH Weld CO Mesonet
Mesonet station CO222 Dearfield.
0756 PM Non-Tstm Wnd Gst 3 SSW Keystone 39.56N 105.99W
12/17/2025 M65 MPH Summit CO Mesonet
Mesonet station SODC2 Soda Creek.
0820 PM Non-Tstm Wnd Gst 2 WSW Frisco 39.56N 106.13W
12/17/2025 M65 MPH Summit CO Mesonet
Mesonet station CO155 1.3 Mi W Of Frisco.
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
0707 PM Non-Tstm Wnd Gst 5 N Pawnee Pass 40.70N 103.48W
12/17/2025 M64 MPH Logan CO AWOS
AWOS station K1MW Sterling 15 WNW.
0724 PM Non-Tstm Wnd Gst 3 SSW Commerce City 39.78N 104.95W
12/17/2025 M64 MPH Denver CO Mesonet
Mesonet station CO205 Denver I-70/Colorado.
0810 PM Non-Tstm Wnd Gst Nunn 40.71N 104.78W
12/17/2025 M64 MPH Weld CO Mesonet
Mesonet station CO171 Nunn.
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.
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.
0724 PM Non-Tstm Wnd Gst 3 NNE Denver 39.78N 104.97W
12/17/2025 M63 MPH Denver CO Mesonet
Mesonet station CO216 Denver
I-70/Washington.
0734 PM Non-Tstm Wnd Gst 2 S Commerce City 39.78N 104.92W
12/17/2025 M63 MPH Denver CO Mesonet
Mesonet station CO203 Denver I-70/Holly St.
0820 PM Non-Tstm Wnd Gst 3 NE Englewood 39.68N 104.96W
12/17/2025 M63 MPH Denver CO Mesonet
Mesonet station CO145 Denver I-25/University
Blvd.
0829 PM Non-Tstm Wnd Gst 1 ESE Downieville 39.77N 105.60W
12/17/2025 M63 MPH Clear Creek CO Mesonet
Mesonet station DMTC2 Dumont.
0832 PM Non-Tstm Wnd Gst 4 NE Loveland 40.45N 105.02W
12/17/2025 M63 MPH Larimer CO AWOS
AWOS station KFNL Northern Colorado Regional
Airport.
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.
0727 PM Non-Tstm Wnd Gst 3 SSE Commerce City 39.78N 104.90W
12/17/2025 M62 MPH Denver CO Mesonet
Mesonet station CO201 Denver I-70/Quebec.
0729 PM Non-Tstm Wnd Gst 3 NNE Loveland Pass 39.70N 105.86W
12/17/2025 M62 MPH Clear Creek CO Mesonet
Mesonet station CO124 I-70 Herman Gulch.
0731 PM Non-Tstm Wnd Gst 5 SE Commerce City 39.77N 104.85W
12/17/2025 M62 MPH Denver CO Mesonet
Mesonet station CO197 Denver I-70/Peoria St.
0855 PM Non-Tstm Wnd Gst 1 ESE Granby 40.08N 105.92W
12/17/2025 M62 MPH Grand CO AWOS
AWOS station KGNB Granby Airport.
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.
0642 PM Non-Tstm Wnd Gst 8 WNW Cowdrey 40.90N 106.43W
12/17/2025 M61 MPH Jackson CO Mesonet
Mesonet station IMRC2 Independence Mountain.
0710 PM Non-Tstm Wnd Gst 3 SW Holyoke 40.54N 102.34W
12/17/2025 M61 MPH Phillips CO Mesonet
Mesonet station AW276 HOLYOKE.
0756 PM Non-Tstm Wnd Gst 3 SW Jefferson 39.35N 105.84W
12/17/2025 M61 MPH Park CO Mesonet
Mesonet station CO110 Jefferson.
0845 PM Non-Tstm Wnd Gst 4 ESE Estes Park 40.36N 105.45W
12/17/2025 M61 MPH Larimer CO Mesonet
Mesonet station DW0774 Estes Park.
1015 AM Non-Tstm Wnd Gst Nederland 39.96N 105.50W
12/17/2025 M60 MPH Boulder CO Mesonet
Mesonet station DVI07801 Nederland.
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.
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.
0723 PM Non-Tstm Wnd Gst 3 SW Commerce City 39.78N 104.96W
12/17/2025 M60 MPH Denver CO Mesonet
Mesonet station CO207 Denver I-70/York St.
0850 PM Non-Tstm Wnd Gst 1 W Nederland 39.96N 105.52W
12/17/2025 M60 MPH Boulder CO Mesonet
Mesonet station GW5353 NEDERLAND.
0900 PM Non-Tstm Wnd Gst 4 E Akron 40.15N 103.14W
12/17/2025 M60 MPH Washington CO Mesonet
Mesonet station AKR02 Akron.
0435 PM Non-Tstm Wnd Gst 3 SSE Superior 39.89N 105.14W
12/17/2025 M59 MPH Broomfield CO Mesonet
Mesonet station GW2489 Broomfield.
0531 PM Non-Tstm Wnd Gst 3 ESE Niwot 40.08N 105.10W
12/17/2025 M59 MPH Boulder CO Mesonet
Mesonet station TT788 Boulder County East.
0723 PM Non-Tstm Wnd Gst 3 SSW Commerce City 39.78N 104.94W
12/17/2025 M59 MPH Denver CO Mesonet
Mesonet station CO208 Denver I-70/Colorado
Blvd.
0731 PM Non-Tstm Wnd Gst 5 SE Commerce City 39.77N 104.85W
12/17/2025 M59 MPH Denver CO Mesonet
Mesonet station CO196 Denver I-70/Peoria St.
0800 PM Non-Tstm Wnd Gst 3 NNW Louviers 39.51N 105.02W
12/17/2025 M59 MPH Douglas CO Mesonet
Mesonet station AT112 Littleton.
0815 PM Non-Tstm Wnd Gst 3 SE Goodrich 40.31N 104.03W
12/17/2025 M59 MPH Morgan CO Mesonet
Mesonet station WIG01 Wiggins.
0815 PM Non-Tstm Wnd Gst 3 WNW Fremont Butte 40.27N 103.35W
12/17/2025 M59 MPH Washington CO Mesonet
Mesonet station BRU01 Brush.
0835 PM Non-Tstm Wnd Gst 9 S Pleasant Valley 40.49N 102.09W
12/17/2025 M59 MPH Phillips CO Mesonet
Mesonet station HYK02 Holyoke.
0131 PM Non-Tstm Wnd Gst 3 WNW Aspen Park 39.55N 105.35W
12/17/2025 M58 MPH Jefferson CO Mesonet
Mesonet station GW3026 CONIFER.
0435 PM Non-Tstm Wnd Gst 1 S Hygiene 40.17N 105.17W
12/17/2025 M58 MPH Boulder CO AWOS
AWOS station KLMO Longmont Airport.
0650 PM Non-Tstm Wnd Gst 2 SSW Elkdale 40.01N 105.89W
12/17/2025 M58 MPH Grand CO Mesonet
Mesonet station CW5469 Tabernash.
0658 PM Non-Tstm Wnd Gst 2 NNE Dillon 39.65N 106.03W
12/17/2025 M58 MPH Summit CO Mesonet
Mesonet station CO158 2 E of Silverthorne
I-70.
0721 PM Non-Tstm Wnd Gst 4 SE Commerce City 39.78N 104.88W
12/17/2025 M58 MPH Denver CO Mesonet
Mesonet station CO211 Denver I-70/Central
Park.
0723 PM Non-Tstm Wnd Gst 1 SSW Bennett 39.74N 104.43W
12/17/2025 M58 MPH Adams CO Mesonet
Mesonet station CO072 Bennett.
0729 PM Non-Tstm Wnd Gst 4 SE Commerce City 39.77N 104.87W
12/17/2025 M58 MPH Denver CO Mesonet
Mesonet station DCPC2 Denver Central Park.
0822 PM Non-Tstm Wnd Gst 2 NNE New Raymer 40.63N 103.83W
12/17/2025 M58 MPH Weld CO AWOS
AWOS station K1NW 1 NNE New Raymer.
0825 PM Non-Tstm Wnd Gst 1 E Limon 39.27N 103.67W
12/17/2025 M58 MPH Lincoln CO ASOS
ASOS station KLIC Limon.
0836 PM Non-Tstm Wnd Gst 3 NW Kelim 40.43N 104.99W
12/17/2025 M58 MPH Larimer CO Mesonet
Mesonet station CO050 I-25 Loveland
Crossroads.
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.
0430 PM Non-Tstm Wnd Dmg 1 N Superior 39.94N 105.16W
12/17/2025 Boulder CO NWS Employee
Light pole blown down in Rock Creek North
neighborhood.
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.
&&Local storm report, Dec 17, 10:07 PM MST, 4 hours 24 minutes before
Preliminary Local Storm Report...Summary
National Weather Service Denver CO
1007 PM MST Wed Dec 17 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0900 PM Non-Tstm Wnd Gst 2 E Copper Mountain 39.49N 106.11W
12/17/2025 M124 MPH Summit CO Mesonet
CAIC mesonet station on top of Breckenridge
Peak 6 at 12,573 ft.
0952 PM Non-Tstm Wnd Gst 3 N Berthoud Pass 39.84N 105.78W
12/17/2025 M124 MPH Grand CO Mesonet
Mesonet station at Parsenn Bowl Summit,
elevation 12,060 ft.
0800 PM Non-Tstm Wnd Gst 3 SW Breckenridge 39.48N 106.09W
12/17/2025 M113 MPH Summit CO Mesonet
CAIC Mesonet station at 11,900 feet.
0818 PM Non-Tstm Wnd Gst 4 SE Keystone 39.56N 105.91W
12/17/2025 M110 MPH Summit CO Mesonet
Mesonet station GW5575 DILLON.
0330 PM Non-Tstm Wnd Gst 3 NW Marshall 39.98N 105.28W
12/17/2025 E109 MPH Boulder CO Mesonet
NCAR Mesa Lab. Time and wind magnitude
estimated from Gill wind sensor.
0630 PM Non-Tstm Wnd Gst 2 S Winter Park 39.85N 105.78W
12/17/2025 M103 MPH Grand CO Mesonet
Mesonet station DDWPE Wp Eagle Wind.
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.
0715 PM Non-Tstm Wnd Gst 1 ENE Berthoud Pass 39.80N 105.77W
12/17/2025 M102 MPH Grand CO AWOS
AWOS station K0CO Berthoud Pass.
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).
0830 PM Non-Tstm Wnd Gst 1 NNW Akron 40.17N 103.22W
12/17/2025 M89 MPH Washington CO AWOS
AWOS station KAKO Akron.
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.
0946 PM Non-Tstm Wnd Gst 11 NNE Kremmling 40.21N 106.33W
12/17/2025 M85 MPH Grand CO Mesonet
Mesonet station GSPC2 Gunsight.
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.
0718 PM Non-Tstm Wnd Gst 6 SW Carr 40.84N 104.97W
12/17/2025 M82 MPH Larimer CO Mesonet
Mesonet station CO166 I-25 and Buckeye Rd.
0735 PM Non-Tstm Wnd Gst 3 ESE Buckeye 40.81N 105.04W
12/17/2025 M81 MPH Larimer CO Mesonet
Mesonet station BEYC2 Buckeye.
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.
0717 PM Non-Tstm Wnd Gst 2 ESE Sterling 40.62N 103.17W
12/17/2025 M78 MPH Logan CO Mesonet
Mesonet station CO035 I-76 Sterling.
0755 PM Non-Tstm Wnd Gst Fort Morgan Airport 40.33N 103.80W
12/17/2025 M77 MPH Morgan CO AWOS
AWOS station KFMM Fort Morgan.
0901 PM Non-Tstm Wnd Gst 2 WSW Frisco 39.56N 106.13W
12/17/2025 M75 MPH Summit CO Mesonet
Mesonet station CO155 1.3 Mi W Of Frisco.
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.
0734 PM Non-Tstm Wnd Gst 3 SE Tolland 39.87N 105.55W
12/17/2025 M74 MPH Gilpin CO AWOS
AWOS station KC99 Dakota Hill.
0749 PM Non-Tstm Wnd Gst 2 W Mishawaka 40.70N 105.41W
12/17/2025 M74 MPH Larimer CO Mesonet
Mesonet station GW4629 LIVERMORE.
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.
0833 PM Non-Tstm Wnd Gst 1 ESE Akron 40.16N 103.20W
12/17/2025 M73 MPH Washington CO Mesonet
Mesonet station EW7755 Akron.
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.
0810 PM Non-Tstm Wnd Gst 2 ENE Wiggins 40.25N 104.04W
12/17/2025 M72 MPH Morgan CO Mesonet
Mesonet station CO039 Wiggins Bijou Creek.
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.
0630 PM Non-Tstm Wnd Gst 5 SW Elkdale 39.99N 105.95W
12/17/2025 M71 MPH Grand CO Mesonet
Mesonet station DDYMC Ymca.
0633 PM Non-Tstm Wnd Gst 1 NNW Briggsdale 40.64N 104.33W
12/17/2025 M71 MPH Weld CO Mesonet
Mesonet station CO043 Briggsdale.
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.
0607 PM Non-Tstm Wnd Gst 4 NNW Keystone 39.66N 105.98W
12/17/2025 M70 MPH Summit CO Mesonet
Mesonet station CO159 I-70 Silverthorne 6 E.
0745 PM Non-Tstm Wnd Gst 2 SSW Laporte 40.59N 105.14W
12/17/2025 M70 MPH Larimer CO Mesonet
Mesonet station FCC01 Christman Air Field.
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.
0734 PM Non-Tstm Wnd Gst 4 NNW Buckley AFB 39.76N 104.77W
12/17/2025 M69 MPH Adams CO Mesonet
Mesonet station CO218 Aurora I-70/Tower Rd.
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.
0759 PM Non-Tstm Wnd Gst 1 WSW Lawson 39.76N 105.64W
12/17/2025 M68 MPH Clear Creek CO Mesonet
Mesonet station CO147 I-70 Empire Junction.
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.
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.
0608 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.
0843 PM Non-Tstm Wnd Gst 4 WNW Johnstown 40.35N 104.98W
12/17/2025 M67 MPH Larimer CO Mesonet
Mesonet station CO223 025s25325rws1rhs - 1.0
Mile S Of.
0920 PM Non-Tstm Wnd Gst 1 W Nederland 39.96N 105.52W
12/17/2025 M67 MPH Boulder CO Mesonet
Mesonet station GW5353 NEDERLAND.
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.
0627 PM Non-Tstm Wnd Gst 1 ENE Tabernash 39.99N 105.83W
12/17/2025 M66 MPH Grand CO Mesonet
Mesonet station CO139 US 40 At Fraser Flats.
0726 PM Non-Tstm Wnd Gst 2 SE Denver Intl Airpor 39.85N 104.65W
12/17/2025 M66 MPH Denver CO ASOS
ASOS station KDEN Denver Intl Airport.
0807 PM Non-Tstm Wnd Gst 2 NNW Briggsdale 40.65N 104.34W
12/17/2025 M66 MPH Weld CO Mesonet
Mesonet station TT567 Crow Creek.
0831 PM Non-Tstm Wnd Gst 1 WNW Dillon 39.63N 106.06W
12/17/2025 M66 MPH Summit CO Mesonet
Mesonet station CO069 I-70 Silverthorne
East.
0850 PM Non-Tstm Wnd Gst Virginia Dale 40.95N 105.35W
12/17/2025 M66 MPH Larimer CO Mesonet
Mesonet station CO036 Virginia Dale.
0627 PM Non-Tstm Wnd Gst 12 WSW Tabernash 39.89N 106.04W
12/17/2025 M65 MPH Grand CO Mesonet
Mesonet station KSEC2 Keyser Ridge.
0728 PM Non-Tstm Wnd Gst 1 W Masters 40.29N 104.26W
12/17/2025 M65 MPH Weld CO Mesonet
Mesonet station CO222 Dearfield.
0756 PM Non-Tstm Wnd Gst 3 SSW Keystone 39.56N 105.99W
12/17/2025 M65 MPH Summit CO Mesonet
Mesonet station SODC2 Soda Creek.
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
0707 PM Non-Tstm Wnd Gst 5 N Pawnee Pass 40.70N 103.48W
12/17/2025 M64 MPH Logan CO AWOS
AWOS station K1MW Sterling 15 WNW.
0724 PM Non-Tstm Wnd Gst 3 SSW Commerce City 39.78N 104.95W
12/17/2025 M64 MPH Denver CO Mesonet
Mesonet station CO205 Denver I-70/Colorado.
0810 PM Non-Tstm Wnd Gst Nunn 40.71N 104.78W
12/17/2025 M64 MPH Weld CO Mesonet
Mesonet station CO171 Nunn.
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.
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.
0724 PM Non-Tstm Wnd Gst 3 NNE Denver 39.78N 104.97W
12/17/2025 M63 MPH Denver CO Mesonet
Mesonet station CO216 Denver
I-70/Washington.
0734 PM Non-Tstm Wnd Gst 2 S Commerce City 39.78N 104.92W
12/17/2025 M63 MPH Denver CO Mesonet
Mesonet station CO203 Denver I-70/Holly St.
0820 PM Non-Tstm Wnd Gst 3 NE Englewood 39.68N 104.96W
12/17/2025 M63 MPH Denver CO Mesonet
Mesonet station CO145 Denver I-25/University
Blvd.
0829 PM Non-Tstm Wnd Gst 1 ESE Downieville 39.77N 105.60W
12/17/2025 M63 MPH Clear Creek CO Mesonet
Mesonet station DMTC2 Dumont.
0832 PM Non-Tstm Wnd Gst 4 NE Loveland 40.45N 105.02W
12/17/2025 M63 MPH Larimer CO AWOS
AWOS station KFNL Northern Colorado Regional
Airport.
0930 PM Non-Tstm Wnd Gst 4 ESE Estes Park 40.36N 105.45W
12/17/2025 M63 MPH Larimer CO Mesonet
Mesonet station DW0774 Estes Park.
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.
0727 PM Non-Tstm Wnd Gst 3 SSE Commerce City 39.78N 104.90W
12/17/2025 M62 MPH Denver CO Mesonet
Mesonet station CO201 Denver I-70/Quebec.
0729 PM Non-Tstm Wnd Gst 3 NNE Loveland Pass 39.70N 105.86W
12/17/2025 M62 MPH Clear Creek CO Mesonet
Mesonet station CO124 I-70 Herman Gulch.
0731 PM Non-Tstm Wnd Gst 5 SE Commerce City 39.77N 104.85W
12/17/2025 M62 MPH Denver CO Mesonet
Mesonet station CO197 Denver I-70/Peoria St.
0855 PM Non-Tstm Wnd Gst 1 ESE Granby 40.08N 105.92W
12/17/2025 M62 MPH Grand CO AWOS
AWOS station KGNB Granby Airport.
0903 PM Non-Tstm Wnd Gst 1 ENE Milliken 40.32N 104.83W
12/17/2025 M62 MPH Weld CO Mesonet
Mesonet station GW3548 MILLIKEN.
0925 PM Non-Tstm Wnd Gst 3 SSW Tabernash 39.94N 105.87W
12/17/2025 M62 MPH Grand CO Mesonet
Mesonet station DVI02983 Fraser.
0932 PM 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 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.
0642 PM Non-Tstm Wnd Gst 8 WNW Cowdrey 40.90N 106.43W
12/17/2025 M61 MPH Jackson CO Mesonet
Mesonet station IMRC2 Independence Mountain.
0710 PM Non-Tstm Wnd Gst 3 SW Holyoke 40.54N 102.34W
12/17/2025 M61 MPH Phillips CO Mesonet
Mesonet station AW276 HOLYOKE.
0756 PM Non-Tstm Wnd Gst 3 SW Jefferson 39.35N 105.84W
12/17/2025 M61 MPH Park CO Mesonet
Mesonet station CO110 Jefferson.
0856 PM Non-Tstm Wnd Gst 3 NW Kelim 40.43N 104.99W
12/17/2025 M61 MPH Larimer CO Mesonet
Mesonet station CO050 I-25 Loveland
Crossroads.
1015 AM Non-Tstm Wnd Gst Nederland 39.96N 105.50W
12/17/2025 M60 MPH Boulder CO Mesonet
Mesonet station DVI07801 Nederland.
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.
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.
0723 PM Non-Tstm Wnd Gst 3 SW Commerce City 39.78N 104.96W
12/17/2025 M60 MPH Denver CO Mesonet
Mesonet station CO207 Denver I-70/York St.
0900 PM Non-Tstm Wnd Gst 4 E Akron 40.15N 103.14W
12/17/2025 M60 MPH Washington CO Mesonet
Mesonet station AKR02 Akron.
0935 PM Non-Tstm Wnd Gst 3 WSW Sterling 40.62N 103.27W
12/17/2025 M60 MPH Logan CO AWOS
AWOS station KSTK Sterling.
0435 PM Non-Tstm Wnd Gst 3 SSE Superior 39.89N 105.14W
12/17/2025 M59 MPH Broomfield CO Mesonet
Mesonet station GW2489 Broomfield.
0531 PM Non-Tstm Wnd Gst 3 ESE Niwot 40.08N 105.10W
12/17/2025 M59 MPH Boulder CO Mesonet
Mesonet station TT788 Boulder County East.
0723 PM Non-Tstm Wnd Gst 3 SSW Commerce City 39.78N 104.94W
12/17/2025 M59 MPH Denver CO Mesonet
Mesonet station CO208 Denver I-70/Colorado
Blvd.
0731 PM Non-Tstm Wnd Gst 5 SE Commerce City 39.77N 104.85W
12/17/2025 M59 MPH Denver CO Mesonet
Mesonet station CO196 Denver I-70/Peoria St.
0800 PM Non-Tstm Wnd Gst 3 NNW Louviers 39.51N 105.02W
12/17/2025 M59 MPH Douglas CO Mesonet
Mesonet station AT112 Littleton.
0815 PM Non-Tstm Wnd Gst 3 SE Goodrich 40.31N 104.03W
12/17/2025 M59 MPH Morgan CO Mesonet
Mesonet station WIG01 Wiggins.
0815 PM Non-Tstm Wnd Gst 3 WNW Fremont Butte 40.27N 103.35W
12/17/2025 M59 MPH Washington CO Mesonet
Mesonet station BRU01 Brush.
0835 PM Non-Tstm Wnd Gst 9 S Pleasant Valley 40.49N 102.09W
12/17/2025 M59 MPH Phillips CO Mesonet
Mesonet station HYK02 Holyoke.
0131 PM Non-Tstm Wnd Gst 3 WNW Aspen Park 39.55N 105.35W
12/17/2025 M58 MPH Jefferson CO Mesonet
Mesonet station GW3026 CONIFER.
0435 PM Non-Tstm Wnd Gst 1 S Hygiene 40.17N 105.17W
12/17/2025 M58 MPH Boulder CO AWOS
AWOS station KLMO Longmont Airport.
0650 PM Non-Tstm Wnd Gst 2 SSW Elkdale 40.01N 105.89W
12/17/2025 M58 MPH Grand CO Mesonet
Mesonet station CW5469 Tabernash.
0658 PM Non-Tstm Wnd Gst 2 NNE Dillon 39.65N 106.03W
12/17/2025 M58 MPH Summit CO Mesonet
Mesonet station CO158 2 E of Silverthorne
I-70.
0721 PM Non-Tstm Wnd Gst 4 SE Commerce City 39.78N 104.88W
12/17/2025 M58 MPH Denver CO Mesonet
Mesonet station CO211 Denver I-70/Central
Park.
0723 PM Non-Tstm Wnd Gst 1 SSW Bennett 39.74N 104.43W
12/17/2025 M58 MPH Adams CO Mesonet
Mesonet station CO072 Bennett.
0729 PM Non-Tstm Wnd Gst 4 SE Commerce City 39.77N 104.87W
12/17/2025 M58 MPH Denver CO Mesonet
Mesonet station DCPC2 Denver Central Park.
0822 PM Non-Tstm Wnd Gst 2 NNE New Raymer 40.63N 103.83W
12/17/2025 M58 MPH Weld CO AWOS
AWOS station K1NW 1 NNE New Raymer.
0825 PM Non-Tstm Wnd Gst 1 E Limon 39.27N 103.67W
12/17/2025 M58 MPH Lincoln CO ASOS
ASOS station KLIC Limon.
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.
0430 PM Non-Tstm Wnd Dmg 1 N Superior 39.94N 105.16W
12/17/2025 Boulder CO NWS Employee
Light pole blown down in Rock Creek North
neighborhood.
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 17, 6:57 PM MST | High Wind Warning | BOU | Larimer, Weld | 5 hr |
| Dec 18, 2:44 PM MST | Red Flag Warning | BOU | Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 7 more | 33 hr |
Nearby
Red Flag Warnings in Colorado, 2025Every red flag 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.