The National Weather Service in Grand Forks has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 10 AM to 7 PM CDT Saturday. * AFFECTED AREA...In Minnesota, Hubbard, West Becker, East Becker, Wilkin, West Otter Tail, East Otter Tail, Wadena and Grant. In North Dakota, Sargent and Richland. * WINDS...Southwest 15 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. Outdoor burning is not recommended.