Alert archive / Colorado / Red Flag Warnings in 2026
Red Flag Warning 20, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this red flag warning at Mar 12, 2026, 12:50 PM MDT for 16 counties in Colorado. It took effect at Mar 13, 2026, 11:00 AM MDT. It was in force for 9 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
- Mar 12, 2026, 12:50 PM MDT (18:50 UTC)
- In effect from
- Mar 13, 2026, 11:00 AM MDT
- Expired
- Mar 13, 2026, 8:00 PM MDT
- In force
- 9 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Adams County, CO, Arapahoe County, CO, Boulder County, CO, Broomfield County, CO, Denver County, CO, Douglas County, CO, Elbert County, CO, Jefferson County, CO, Larimer County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO
The radar
The Denver radar (KFTG), 42 km from the middle of the area, began a volume at 18:54 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 text
As transmitted.
494 WWUS85 KBOU 121850 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 1250 PM MDT Thu Mar 12 2026 COZ238>249-130400- /O.UPG.KBOU.FW.A.0015.260313T1700Z-260314T0200Z/ /O.NEW.KBOU.FW.W.0020.260313T1700Z-260314T0200Z/ /O.NEW.KBOU.FW.A.0016.260314T1700Z-260315T0300Z/ /O.CON.KBOU.FW.W.0019.000000T0000Z-260313T0300Z/ 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- 1250 PM MDT Thu Mar 12 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE URBAN CORRIDOR AND PLAINS... ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 8 PM MDT FRIDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE URBAN CORRIDOR AND MAJORITY OF THE PLAINS... ...FIRE WEATHER WATCH IN EFFECT FROM SATURDAY MORNING THROUGH SATURDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE URBAN CORRIDOR AND MAJORITY OF THE PLAINS... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 11 AM to 8 PM MDT Friday. A Fire Weather Watch has also been issued. This Fire Weather Watch for wind and low relative humidity is in effect from Saturday morning through Saturday evening. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248 and 249. * TIMING...For the first Red Flag Warning, until 9 PM MDT this evening. For the second Red Flag Warning, from 11 AM to 8 PM MDT Friday. For the Fire Weather Watch, from Saturday morning through Saturday evening. * WINDS...On Thursday, west 30 to 60 mph with gusts up to 90 mph, strongest winds near the Cheyenne Ridge. On Friday, west winds 25 to 35 with gusts around 35 to 50 mph. On Saturday, west winds 25 to 35 with gusts around 40 to 60 mph. * 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 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. && $$ COZ250-251-130300- /O.CON.KBOU.FW.W.0019.000000T0000Z-260313T0300Z/ Sedgwick County-Phillips County- 1250 PM MDT Thu Mar 12 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR SEDGWICK AND PHILLIPS COUNTIES... * AFFECTED AREA...Fire Weather Zones 250 and 251. * TIMING...Until 9 PM MDT this evening. * WINDS...West 25 to 35 mph with gusts up to 60 mph. * RELATIVE HUMIDITY...As low as 14 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
4 follow-up statements
195 WWUS85 KBOU 130258 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 858 PM MDT Thu Mar 12 2026 COZ238>249-132100- /O.EXP.KBOU.FW.W.0019.000000T0000Z-260313T0300Z/ /O.UPG.KBOU.FW.A.0016.260314T1700Z-260315T0300Z/ /O.NEW.KBOU.FW.W.0021.260314T1700Z-260315T0300Z/ /O.CON.KBOU.FW.W.0020.260313T1700Z-260314T0200Z/ 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- 858 PM MDT Thu Mar 12 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 8 PM MDT FRIDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE URBAN CORRIDOR AND PLAINS... ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 9 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE URBAN CORRIDOR AND PLAINS... ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE URBAN CORRIDOR AND PLAINS... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 11 AM to 9 PM MDT Saturday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248 and 249. * TIMING...For Friday, from 11 AM to 8 PM MDT. For Saturday, from 11 AM to 9 PM MDT Saturday. * WINDS...On Friday, west winds 15 to 25 mph with gusts 25 to 40 mph. On Saturday, west winds 20 to 30 mph with gusts 35 to 50 mph. * RELATIVE HUMIDITY...On Friday, 12 to 17 percent. On Saturday, 10 to 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. && $$ COZ250-251-132100- /O.EXP.KBOU.FW.W.0019.000000T0000Z-260313T0300Z/ /O.NEW.KBOU.FW.W.0021.260314T1700Z-260315T0300Z/ /O.EXA.KBOU.FW.W.0020.260313T1700Z-260314T0200Z/ Sedgwick County-Phillips County- 858 PM MDT Thu Mar 12 2026 ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 8 PM MDT FRIDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR SEDGWICK AND PHILLIPS COUNTIES... ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 9 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR SEDGWICK AND PHILLIPS COUNTIES... ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR SEDGWICK AND PHILLIPS COUNTIES... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 11 AM to 8 PM MDT Friday. A Red Flag Warning has also been issued from 11 AM to 9 PM MDT Saturday. * AFFECTED AREA...Fire Weather Zones 250 and 251. * TIMING...For Friday, from 11 AM to 8 PM MDT. For Saturday, from 11 AM to 9 PM MDT Saturday. * WINDS...On Friday, west winds 15 to 20 mph with gusts up to 35 mph. On Saturday, west winds 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 13 to 18 percent both days. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ Rodriguez
873 WWUS85 KBOU 130906 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 306 AM MDT Fri Mar 13 2026 COZ238>251-140015- /O.CON.KBOU.FW.W.0020.260313T1700Z-260314T0200Z/ /O.CON.KBOU.FW.W.0021.260314T1700Z-260315T0300Z/ 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- 306 AM MDT Fri Mar 13 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 8 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE URBAN CORRIDOR AND PLAINS... ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 9 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE URBAN CORRIDOR AND PLAINS... * AFFECTED AREA...Fire Weather Zones 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250 and 251. * TIMING...For the first Red Flag Warning, from 11 AM this morning to 8 PM MDT this evening. For the second Red Flag Warning, from 11 AM to 9 PM MDT Saturday. * WINDS...Today, west winds 15 to 25 mph with gusts 25 to 40 mph. On Saturday, west winds 20 to 30 mph with gusts 35 to 50 mph. * RELATIVE HUMIDITY...Today, 12 to 17 percent. On Saturday, 10 to 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. && $$
558 WWUS85 KBOU 132320 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 520 PM MDT Fri Mar 13 2026 COZ238>251-140200- /O.CON.KBOU.FW.W.0020.000000T0000Z-260314T0200Z/ /O.CON.KBOU.FW.W.0021.260314T1700Z-260315T0300Z/ 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- 520 PM MDT Fri Mar 13 2026 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE URBAN CORRIDOR AND PLAINS... ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 9 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE URBAN CORRIDOR AND PLAINS... * AFFECTED AREA...Fire Weather Zones 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250 and 251. * TIMING...For the first Red Flag Warning, until 8 PM MDT this evening. For the second Red Flag Warning, from 11 AM to 9 PM MDT Saturday. * WINDS...Today, west winds 15 to 25 mph with gusts 25 to 35 mph. On Saturday, west winds 20 to 30 mph with gusts 35 to 60 mph, strongest west of I-25. * RELATIVE HUMIDITY...Today, 12 to 17 percent. On Saturday, 8 to 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. && $$ Rodriguez
128 WWUS85 KBOU 140158 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 758 PM MDT Fri Mar 13 2026 COZ238>251-141200- /O.EXP.KBOU.FW.W.0020.000000T0000Z-260314T0200Z/ /O.CON.KBOU.FW.W.0021.260314T1700Z-260315T0300Z/ 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- 758 PM MDT Fri Mar 13 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 9 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE URBAN CORRIDOR AND PLAINS... ...RED FLAG WARNING WILL EXPIRE AT 8 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE URBAN CORRIDOR AND PLAINS... * AFFECTED AREA...Fire Weather Zones 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250 and 251. * TIMING...From 11 AM to 9 PM MDT Saturday. * WINDS...West winds 20 to 35 mph with gusts 35 to 60 mph, strongest west of I-25 mid to late afternoon. * RELATIVE HUMIDITY...As low as 7 to 14%. * 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. && $$ Rodriguez
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 Mar 12, 5:47 AM MDT, 7 hours 3 minutes earlier. Its key messages:
- Prolonged period of critical fire weather conditions today through Saturday as successive high wind events and dry conditions impact our forecast area.
- Mountain snow expected to develop late Saturday following a cold front, with precipitation potential and much cooler temperatures extending into the lower elevations through Sunday.
- Rapid warming begins Monday into Tuesday, potentially culminating in record-breaking temperatures mid to late next week.
Area forecast discussion, Mar 12, 5:47 AM MDT, 7 hours 3 minutes before
Area Forecast Discussion National Weather Service Denver/Boulder CO 547 AM MDT Thu Mar 12 2026 .KEY MESSAGES... - Prolonged period of critical fire weather conditions today through Saturday as successive high wind events and dry conditions impact our forecast area. - Mountain snow expected to develop late Saturday following a cold front, with precipitation potential and much cooler temperatures extending into the lower elevations through Sunday. - Rapid warming begins Monday into Tuesday, potentially culminating in record-breaking temperatures mid to late next week. && .DISCUSSION /Through Wednesday/... Issued at 1223 AM MDT Thu Mar 12 2026 A prolonged period of enhanced downslope winds and high fire danger is on our doorstep, with gusts already picking up on our leeside slopes as surface pressure gradients tighten (~2mb increase in the past 2-3 hrs for Grand Junction - Denver gradients). This trend will continue through this afternoon as a pronounced surface low amplifies over the Upper Midwest and gradients peak, driving 55-65 kt cross-barrier flow over the Front Range. Agreement is unanimous regarding the development of a potent mountain wave over the central foothills beginning near or just after daybreak and producing gusts of 80-100 mph, focused primarily above 7,000 ft and east of the Peak- to-Peak corridor with the strongest gusts after 11 AM. Ridgetop wind directions remain marginal with just enough of a northwest component aloft to likely limit downslope amplification into lower elevation urban areas and, despite some favorable shear profiles, signs of a true critical layer are still few and far between. These two factors may be contributing to the vast majority of high-res guidance confining the more extreme gusts to our foothills. Nonetheless, typically wind-prone locations (Cheyenne Ridge into the base of the foothills N/W of Fort Collins, and down through Lyons into the Highway 93 corridor) will be susceptible to gusts 60-75 mph at times. Elsewhere, gusts 45 to 60 mph can be expected, with areas along/south of I-70 seeing the weakest winds (gusts more sporadic and largely below 40 mph). All this said, critical fire weather conditions will be widespread and extend into portions of our lower foothills. Winds relax slightly tonight and retreat into the higher elevations, whilst a backdoor cold front slides SW into our northeast plains bringing locally below-freezing temperatures overnight. Wind and fire weather remain the story for Friday, albeit will a moderation in wind speeds for most areas with exception of the higher foothills/mountains, where winds will remain strong through the morning hours. However, deep mixing and healthy flow aloft will still ensure development of breezy conditions with widespread gusts 25 to 45 mph for the plains/I-25 corridor, strongest near the WY/NE state line. With another dry day on tap, a Fire Weather Watch has been issued for the majority of our lower elevations. Downslope winds are set to strengthen once more Saturday afternoon with a developing shortwave to our north and approaching jet max on its backside. Peak wind strength does not look as high as with today's event, with cross-sections appearing less favorable for a pronounced mountain wave. However, we will be plenty warm (into the 70's) and well-mixed, with increasing QG subsidence through the day helping promote effective spread of windy conditions into all areas, with gusts 35-50 mph during the day for the lower elevations. Sustained low humidity will lead to another high-confidence critical fire weather day. Come Saturday evening, a sharp front is poised to descend into our area, bringing a shot of strong NW to N winds lasting through Sunday. The jet placement, which has inched a little south in the latest guidance, combined with strong frontogenesis, suggests good potential for some banded snowfall impacting not just our mountains but also the lower elevations overnight into early Sunday, although it will be a quick-hitting system with considerable subsidence following shortly behind. There's higher confidence in travel impacts with several inches of snow for our mountains, but a few inches of snow accumulation are also within reach for our I-25 corridor, especially if we can get some efficient (albeit brief) banding. After Sunday's little taste of winter, a rapid warm-up is expected to begin Monday as high pressure builds into the southwestern US, and will only accelerate through the week as the ridge axis expands eastward. Record-breaking temperatures are increasingly likely by the middle of next week. && .AVIATION /12Z TAFS through 12Z Friday/... Issued at 547 AM MDT Thu Mar 12 2026 Main concern will be winds, as it is far more complicated today. As a strong mountain wave develops, gusty westerly winds will slowly emerge across the Denver metro. Like many events, this looks to first develop as a few channels of stronger W/WNW flow, with weaker easterlies or VRB winds elsewhere. While gusty winds are already ongoing at KBJC, most guidance first mixes down some stronger winds by around 15-18z, with more widespread and persistent W/WNW gusts to 30-38 kts by 20-22Z. Given KBJC obs and northern metro Denver obs, can't rule out some westerly earlier than 15Z at KDEN. KBJC will be more prone to stronger west winds throughout the day, with a few gusts of 38-48 kts expected - at this time the strongest winds (gusts >50 kts) are expected to hold in the foothills. Winds should slowly decrease closer to 00z Friday, though a few of those channels of winds could continue til ~06Z. We'll handle these variations, or at least potential variations, with TEMPO groups for what we would think would be the less persistent of the wind observations. Also note LLWS will be possible anytime those surface winds are VRB or light easterly. A more normal southerly winds flow is expected to develop at KDEN and KAPA by 06Z Friday, but still a 30-40% chance of gusty west winds due to mountain wave reflections. KBJC may still see a few puffs of stronger west winds after that time, although a weakening mountain wave means they, too, will likely transition to more of a S/SE flow. VFR conditions will persist with only SCT-BKN high clouds. && .FIRE WEATHER... Issued at 1223 AM MDT Thu Mar 12 2026 Prolonged critical fire weather conditions are in store for today through Saturday as downslope winds, strong at times, impact the foothills and much of the lower elevations. The strongest winds of the period are expected today for areas west of I-25 and along our northern plains, where gusts 45 to 60 mph can be expected. Humidity will fall to or below 15% for a broad swath of the lower elevations (closer to 15-20% for the windier locations and into the lower foothills), with high confidence in development of Red Flag conditions. Humidity recoveries near the base of the foothills will be poor to moderate at best tonight, and may not exceed 25-30% in spots. Peak wind strength will be tapered Friday, but breezy conditions will arguably be more widespread for the plains with gusts 30-50 mph being common. Daytime humidity levels will see little change relative to today, and overnight recoveries will remain limited near the base of the foothills into Saturday morning. Winds are set to re-strengthen Saturday, especially in the afternoon, and it's expected to be the warmest and driest day of this 3-day period. Critical conditions will again be widespread and may extend into portions of the lower foothills where fuels are susceptible/snow cover is limited. A potent cold front is expected to arrive Saturday evening, bringing a shot of strong N/NW winds along with a high likelihood of accumulating snow to many areas through early Sunday. && .BOU WATCHES/WARNINGS/ADVISORIES... High Wind Warning until noon MDT Friday for COZ033>035. High Wind Warning from 10 AM this morning to noon MDT Friday for COZ036. High Wind Warning from 10 AM this morning to 7 PM MDT this evening for COZ038-042-048. Red Flag Warning from 11 AM this morning to 9 PM MDT this evening for COZ238>251. Fire Weather Watch from Friday morning through Friday evening for COZ238>249. && DISCUSSION...BRQ AVIATION...20 FIRE WEATHER...BRQ
Hazardous weather outlook, Mar 12, 3:25 AM MDT, 9 hours 25 minutes before
Hazardous Weather Outlook National Weather Service Denver/Boulder CO 325 AM MDT Thu Mar 12 2026 COZ030>051-130930- 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- 325 AM MDT Thu Mar 12 2026 ...HIGH WIND WARNING FOR THE FRONT RANGE MOUNTAINS, FOOTHILLS, AND PLAINS NEAR THE WYOMING BORDER... ...RED FLAG WARNING FOR ALL OF THE PLAINS TODAY... ...FIRE WEATHER WATCH FOR ALL OF THE PLAINS SATURDAY... This hazardous weather outlook is for northeast and north central Colorado. .DAY ONE...Today and Tonight High winds will develop over the Front Range Mountains and Foothills early this morning and become more widespread through the afternoon. Peak gusts of 80-100 mph can be expected in wind prone areas of the Front Range, resulting in hazardous travel and potential for tree damage and scattered power outages. Some of those stronger winds will spread into the western sections of Fort Collins and Wellington, with gusts of 60-75 mph expected there. Peak gusts on the plains will reach 60 mph near the Wyoming border, but mostly 30-50 mph over the rest of the plains and I-25 Corridor south of Fort Collins. There is potential for rapid wildfire spread across the plains from late morning through the mid evening hours due to the strong winds and very low humidity. .DAYS TWO THROUGH SEVEN...Friday through Wednesday The hazardous fire weather conditions will last through Friday and Saturday, with continued much above normal temperatures, gusty winds, and very low humidity. A strong, fast moving cold front will bring more gusty winds but a chance of snow by Saturday night and Sunday, with a few inches of accumulation and travel impacts likely for the mountains. The I-25 Corridor could see mainly light snow accumulations and travel impacts by late Saturday night and early Sunday morning. A quick warmup and a high potential for record warmth can be expected by the middle of next week. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed, but any reports of high wind or wind damage will be appreciated.
In the hours before
Local storm report, Mar 12, 9:39 AM MDT, 3 hours 11 minutes before
Preliminary Local Storm Report
National Weather Service Denver CO
939 AM MDT Thu Mar 12 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0905 AM Non-Tstm Wnd Gst 1 NE Crisman 40.05N 105.35W
03/12/2026 M83 MPH Boulder CO Mesonet
Mesonet station EW4338 1 NE Crisman.
0850 AM Non-Tstm Wnd Gst 2 NNE Natural Fort 40.99N 104.91W
03/12/2026 M79 MPH Weld CO Mesonet
Mesonet station CO041 I-25 at Wyoming
Border.
0819 AM Non-Tstm Wnd Gst 6 SW Carr 40.84N 104.97W
03/12/2026 M79 MPH Larimer CO Mesonet
Mesonet station CO166 I-25 and Buckeye Rd.
0918 AM Non-Tstm Wnd Gst 4 SSE Carr 40.84N 104.85W
03/12/2026 M78 MPH Weld CO Mesonet
Mesonet station UP288 Carr South.
0919 AM Non-Tstm Wnd Gst 3 SW Rocky Flats 39.87N 105.24W
03/12/2026 M77 MPH Jefferson CO Mesonet
Mesonet station CO109 Rocky Flats Hwy 93 and
72.
0630 AM Non-Tstm Wnd Gst 4 NNW White Ranch Open 39.87N 105.32W
03/12/2026 M75 MPH Jefferson CO Mesonet
Mesonet station 1925W Coal Creek Canyon.
0745 AM Non-Tstm Wnd Gst 4 NE Nederland 39.99N 105.45W
03/12/2026 M75 MPH Boulder CO Public
0735 AM Non-Tstm Wnd Gst 3 ESE Buckeye 40.81N 105.04W
03/12/2026 M74 MPH Larimer CO Mesonet
Mesonet station BEYC2 Buckeye.
0845 AM Non-Tstm Wnd Gst 4 ESE Estes Park 40.36N 105.45W
03/12/2026 M73 MPH Larimer CO Mesonet
Mesonet station DW0774 Estes Park.
0850 AM Non-Tstm Wnd Gst 4 ENE Nederland 39.99N 105.45W
03/12/2026 M73 MPH Boulder CO Mesonet
Mesonet station DW5338 Nederland.
0315 AM Non-Tstm Wnd Gst 3 SE Tolland 39.87N 105.55W
03/12/2026 M72 MPH Gilpin CO AWOS
AWOS station KC99 Dakota Hill.
0818 AM Non-Tstm Wnd Gst 2 ENE Marshall 39.97N 105.19W
03/12/2026 M72 MPH Boulder CO Mesonet
Mesonet station CO167 Louisville US 36
Overlook.
0524 AM Non-Tstm Wnd Gst 2 WNW Aspen Springs 39.84N 105.52W
03/12/2026 M70 MPH Gilpin CO Mesonet
Mesonet station PKLC2 Pickle Gulch.
0830 AM Non-Tstm Wnd Gst 4 ENE Nederland 39.99N 105.45W
03/12/2026 M65 MPH Boulder CO NWS Employee
2 trees blown down.
&&Local storm report, Mar 12, 12:00 PM MDT, 50 minutes before
Preliminary Local Storm Report
National Weather Service Denver CO
1200 PM MDT Thu Mar 12 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0940 AM Non-Tstm Wnd Gst Sunshine 40.07N 105.37W
03/12/2026 M92 MPH Boulder CO Public
0941 AM Non-Tstm Wnd Gst 2 NNE Natural Fort 40.99N 104.91W
03/12/2026 M89 MPH Weld CO Mesonet
Mesonet station CO041 I-25 at Wyoming
Border.
1000 AM Non-Tstm Wnd Gst 1 NE Crisman 40.05N 105.35W
03/12/2026 M87 MPH Boulder CO Mesonet
Mesonet station EW4338 1 NE Crisman.
1113 AM Non-Tstm Wnd Gst 5 NNW Nunn 40.77N 104.81W
03/12/2026 M87 MPH Weld CO Mesonet
Mesonet station UP718 4.9 N Nunn (UPR).
1031 AM Non-Tstm Wnd Gst 2 WNW Marshall 39.96N 105.27W
03/12/2026 M85 MPH Boulder CO Mesonet
Mesonet station TT787 Boulder Flatiron.
0905 AM Non-Tstm Wnd Gst 1 NE Crisman 40.05N 105.35W
03/12/2026 M83 MPH Boulder CO Mesonet
Mesonet station EW4338 1 NE Crisman.
1122 AM Non-Tstm Wnd Gst 6 SW Carr 40.84N 104.97W
03/12/2026 M82 MPH Larimer CO Mesonet
Mesonet station CO166 I-25 and Buckeye Rd.
0929 AM Non-Tstm Wnd Gst 3 SW Rocky Flats 39.87N 105.24W
03/12/2026 M81 MPH Jefferson CO Mesonet
Mesonet station CO109 Rocky Flats Hwy 93 and
72.
0935 AM Non-Tstm Wnd Gst 3 ESE Buckeye 40.81N 105.04W
03/12/2026 M80 MPH Larimer CO Mesonet
Mesonet station BEYC2 Buckeye.
0819 AM Non-Tstm Wnd Gst 6 SW Carr 40.84N 104.97W
03/12/2026 M79 MPH Larimer CO Mesonet
Mesonet station CO166 I-25 and Buckeye Rd.
0850 AM Non-Tstm Wnd Gst 2 NNE Natural Fort 40.99N 104.91W
03/12/2026 M79 MPH Weld CO Mesonet
Mesonet station CO041 I-25 at Wyoming
Border.
1120 AM Non-Tstm Wnd Gst Aspen Springs 39.83N 105.48W
03/12/2026 M79 MPH Gilpin CO Mesonet
Mesonet station CW5066 Aspen Springs.
1126 AM Tstm Wnd Gst 4 NE Nederland 39.99N 105.45W
03/12/2026 M79 MPH Boulder CO Public
0918 AM Non-Tstm Wnd Gst 4 SSE Carr 40.84N 104.85W
03/12/2026 M78 MPH Weld CO Mesonet
Mesonet station UP288 Carr South.
1130 AM Non-Tstm Wnd Gst 4 ENE Nederland 39.99N 105.45W
03/12/2026 M78 MPH Boulder CO Mesonet
Mesonet station DW5338 Nederland.
1132 AM Non-Tstm Wnd Gst 1 E Idaho Springs 39.74N 105.50W
03/12/2026 M78 MPH Clear Creek CO Mesonet
Mesonet station CO143 I-70 Idaho Springs.
0919 AM Non-Tstm Wnd Gst 3 SW Rocky Flats 39.87N 105.24W
03/12/2026 M77 MPH Jefferson CO Mesonet
Mesonet station CO109 Rocky Flats Hwy 93 and
72.
1058 AM Non-Tstm Wnd Gst 2 WNW Brookvale 39.64N 105.46W
03/12/2026 M76 MPH Clear Creek CO Mesonet
Mesonet station CEKC2 Corral Creek.
0630 AM Non-Tstm Wnd Gst 4 NNW White Ranch Open 39.87N 105.32W
03/12/2026 M75 MPH Jefferson CO Mesonet
Mesonet station 1925W Coal Creek Canyon.
0735 AM Non-Tstm Wnd Gst 3 ESE Buckeye 40.81N 105.04W
03/12/2026 M74 MPH Larimer CO Mesonet
Mesonet station BEYC2 Buckeye.
0845 AM Non-Tstm Wnd Gst 4 ESE Estes Park 40.36N 105.45W
03/12/2026 M73 MPH Larimer CO Mesonet
Mesonet station DW0774 Estes Park.
0850 AM Non-Tstm Wnd Gst 4 ENE Nederland 39.99N 105.45W
03/12/2026 M73 MPH Boulder CO Mesonet
Mesonet station DW5338 Nederland.
0952 AM Non-Tstm Wnd Gst 5 S Lyons 40.15N 105.27W
03/12/2026 M73 MPH Boulder CO Mesonet
Mesonet station EW8833 Longmont.
1115 AM Non-Tstm Wnd Gst 2 SSW Laporte 40.59N 105.14W
03/12/2026 M73 MPH Larimer CO Mesonet
Mesonet station FCC01 Christman Air Field.
1131 AM Non-Tstm Wnd Gst 4 SSW Lyons 40.17N 105.30W
03/12/2026 M73 MPH Boulder CO Mesonet
Mesonet station TT789 Heil Ranch.
0315 AM Non-Tstm Wnd Gst 3 SE Tolland 39.87N 105.55W
03/12/2026 M72 MPH Gilpin CO AWOS
AWOS station KC99 Dakota Hill.
0818 AM Non-Tstm Wnd Gst 2 ENE Marshall 39.97N 105.19W
03/12/2026 M72 MPH Boulder CO Mesonet
Mesonet station CO167 Louisville US 36
Overlook.
1050 AM Non-Tstm Wnd Gst 1 SW Evergreen 39.62N 105.36W
03/12/2026 M72 MPH Jefferson CO Mesonet
Mesonet station 1924W Alderfer Three Sisters
Park.
0946 AM Non-Tstm Wnd Gst 3 NNE White Ranch Open 39.85N 105.25W
03/12/2026 M71 MPH Jefferson CO Mesonet
Mesonet station UP709 Clayws.
1142 AM Non-Tstm Wnd Gst 1 N Georgetown 39.73N 105.69W
03/12/2026 M71 MPH Clear Creek CO Mesonet
Mesonet station CO162 I-70 Georgetown Lake.
0524 AM Non-Tstm Wnd Gst 2 WNW Aspen Springs 39.84N 105.52W
03/12/2026 M70 MPH Gilpin CO Mesonet
Mesonet station PKLC2 Pickle Gulch.
1010 AM Non-Tstm Wnd Gst 3 SW Jefferson 39.35N 105.84W
03/12/2026 M69 MPH Park CO Mesonet
Mesonet station CO110 Jefferson.
0830 AM Non-Tstm Wnd Gst 4 ENE Nederland 39.99N 105.45W
03/12/2026 M65 MPH Boulder CO NWS Employee
2 trees blown down.
&&The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 11, 11:23 PM MDT | Fire Weather Watch | BOU | Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 8 more | 13 hr |
| Mar 12, 12:50 PM MDT | Fire Weather Watch | BOU | Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 8 more | 8 hr |
Nearby
Red Flag Warnings in Colorado, 2026Every red flag warning in 2026
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.