WWUS85 KBOU 211142 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 542 AM MDT Sat Mar 21 2026 ...WIDESPREAD CRITICAL FIRE WEATHER CONDITIONS TODAY... All-time record March heat, exceptionally low humidity, and periods of breezy winds will drive critical fire weather conditions this afternoon, most pronounced above 6,000 ft and west of I-25 where winds will be strongest. COZ238>245-248-250-220400- /O.CON.KBOU.FW.W.0027.260321T2000Z-260322T0400Z/ 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-Logan County- Sedgwick County- 542 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM THIS AFTERNOON TO 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE CHEYENNE RIDGE AREA AND PAWNEE NATIONAL GRASSLANDS... * AFFECTED AREA...Fire Weather Zones 238, 239, 240, 241, 242, 243, 244, 245, 248 and 250. * TIMING...From 2 PM this afternoon to 10 PM MDT this evening. * WINDS...West 10 to 20 mph with gusts 25 to 35 mph. * RELATIVE HUMIDITY...As low as 3 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. && $$ COZ214>216-220400- /O.CON.KBOU.FW.W.0027.260321T1700Z-260322T0400Z/ Central and Southeast Park County- Larimer and Boulder Counties Between 6000 and 9000 Feet- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- 542 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE FRONT RANGE FOOTHILLS AND SOUTH PARK...FIRE WEATHER ZONES 214 THROUGH 216... * AFFECTED AREA...Fire Weather Zones 214, 215 and 216. * TIMING...From 11 AM this morning to 10 PM MDT this evening. * WINDS...West 15 to 20 mph with gusts 35 to 40 mph. * RELATIVE HUMIDITY...4 to 9 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ211-213-220400- /O.CON.KBOU.FW.W.0027.260321T1700Z-260322T0400Z/ Jackson County Below 9000 Feet- Grand and Summit Counties Below 9000 Feet- 542 AM MDT Sat Mar 21 2026 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR NORTH PARK AND MIDDLE PARK...FIRE WEATHER ZONES 211 AND 213... * AFFECTED AREA...Fire Weather Zones 211 and 213. * TIMING...From 11 AM this morning to 10 PM MDT this evening. * WINDS...West 15 to 20 mph with gusts 35 to 40 mph. * RELATIVE HUMIDITY...5 to 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. && $$ Rodriguez