Minnesota, South Dakota Red Flag Warning | Effective 04/21/2026 12:39
* 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 23 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.