Expected

Responsive action SHOULD be taken soon (within next hour)

South Dakota Red Flag Warning | Effective 04/21/2026 23:17

* AFFECTED AREA...In South Dakota, Dewey, Potter, Faulk, Spink, Stanley, Sully, Hughes, Hyde, Hand, Jones, Lyman and Buffalo. * WINDS...South 20 to 30 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...As low as 15 percent. * IMPACTS...Any fires that ignite will spread rapidly and become difficult to control or suppress. 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

Minnesota, South Dakota Red Flag Warning | Effective 04/21/2026 23:17

* AFFECTED AREA...In Minnesota, Big Stone. In South Dakota, Clark, Codington, Grant, Hamlin and Deuel. * WINDS...South 20 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 22 percent. * IMPACTS...Any fires that ignite will spread rapidly and become difficult to control or suppress. 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.

Colorado Red Flag Warning | Effective 04/21/2026 23:20

...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM THIS MORNING TO MIDNIGHT MDT TONIGHT FOR FIRE WEATHER ZONE 220... * THIS IS A PARTICULARLY DANGEROUS SITUATION * AFFECTED AREA...Fire Weather Zone 220. * TIMING...From 10 AM this morning to midnight MDT tonight. * WINDS...Southwest 25 to 35 mph with gusts up to 60 mph. * RELATIVE HUMIDITY...As low as 8 percent. * IMPACTS...Extreme fire danger is expected. Fires will uncontrollably spread and be very destructive. This is a Particularly Dangerous Situation that poses a

Colorado Red Flag Warning | Effective 04/21/2026 23:20

...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM THIS MORNING TO MIDNIGHT MDT TONIGHT FOR FIRE WEATHER ZONES 221, 222, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, AND 237... ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 9 PM MDT THURSDAY FOR FOR FIRE WEATHER ZONES 221, 222, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, AND 237... The National Weather Service in Pueblo has issued a Red Flag Warning for gusty winds and low relative humidity, which is in

Colorado Red Flag Warning | Effective 04/21/2026 23:20

...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM THIS MORNING TO MIDNIGHT MDT TONIGHT FOR FIRE WEATHER ZONES 221, 222, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, AND 237... ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 9 PM MDT THURSDAY FOR FOR FIRE WEATHER ZONES 221, 222, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, AND 237... The National Weather Service in Pueblo has issued a Red Flag Warning for gusty winds and low relative humidity, which is in

Oklahoma, Texas Red Flag Warning | Effective 04/21/2026 22:51

* WINDS...Today. Southwest 15 to 25 mph with gusts up to 35 mph. Thursday. West southwest winds 20 to 30 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...Today. As low as 7 percent. Thursday. As low as 5 percent. * TEMPERATURES...Today. In the upper 80s. Thursday in the mid 80s to lower 90s. * IMPACTS...Any fires that develop will have the potential to spread rapidly. Outdoor burning is not recommended. * SEVERITY... FUELS (ERC)...70th-89th percentile...4 (out of 5). WEATHER...Near Critical...2 (out of 5).

Colorado, Wyoming Red Flag Warning | Effective 04/21/2026 22:53

* AFFECTED AREA...Fire Weather Zone 215. * TIMING...From 10 AM Wednesday to midnight MDT Wednesday night. * WINDS...West 20 to 30 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...5 to 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. A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of

Colorado Red Flag Warning | Effective 04/21/2026 22:53

* AFFECTED AREA...Fire Weather Zones 214, 216, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250 and 251. * TIMING...For the Red Flag Warning, from 10 AM Wednesday to midnight MDT Wednesday night. For the Fire Weather Watch, from Thursday morning through Thursday evening. * WINDS...For the Red Flag Warning, west 20 to 30 mph with gusts up to 45 mph. For the Fire Weather Watch, northwest winds gusting up to 50 mph. * RELATIVE HUMIDITY...For the Red Flag Warning, 5 to 8 percent.

Montana Winter Storm Warning | Effective 04/21/2026 22:56

* WHAT...Heavy wet snow expected. Total snow accumulations between 5 and 12 inches, with higher amounts over the mountain peaks. Winds gusting as high as 40 mph. * WHERE...Gallatin and Madison County Mountains and Centennial Mountains. * WHEN...From 6 PM Wednesday to 6 PM MDT Thursday. * IMPACTS...Travel could be very difficult and tire chains may be required for some vehicles. Those in the backcountry should ensure they are prepared for dangerous conditions.

Montana Winter Weather Advisory | Effective 04/21/2026 22:56

* WHAT...Wet snow expected. Total snow accumulations up to 3 inches over the plains and between 2 and 6 inches at Marias Pass. Accumulations will be in excess of 6 inches over the higher terrain of Glacier National Park. Winds gusting as high as 45 mph. * WHERE...Eastern Glacier National Park and adjacent foothills and plains. * WHEN...From 6 PM Wednesday to 6 PM MDT Thursday. * IMPACTS...Expect difficult driving conditions due to slush or snow covered roadways. Falling and or blowing snow may significantly
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