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

Headline: 
Red Flag Warning issued April 22 at 1:17AM CDT until April 22 at 8:00PM CDT by NWS Aberdeen SD
Event: 
Red Flag Warning
Urgency: 
Expected
Effective: 
April 21, 2026 - 11:17pm
Expires: 
April 22, 2026 - 7:30am
Description: 
The National Weather Service in Aberdeen has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 11 AM CDT /10 AM MDT/ this morning to 8 PM CDT /7 PM MDT/ this evening. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...In South Dakota, Corson, Campbell, McPherson, Brown, Walworth and Edmunds. * WINDS...South 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 18 percent. * IMPACTS...Any fires that ignite will spread rapidly and become difficult to control or suppress.
Instruction: 
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.
Area Description: 
Corson; Campbell; McPherson; Brown; Walworth; Edmunds
Forcast Office: 
NWS Aberdeen SD