...CRITICAL FIRE WEATHER CONDITIONS POSSIBLE THURSDAY ACROSS PORTIONS OF NORTHEASTERN WYOMING AND SOUTHWESTERN INTO SOUTH CENTRAL SOUTH DAKOTA... .Very warm (70s and 80s) and dry (humidities as low as 13 percent) conditions today. Southwest winds will increase through the day with gusts to 40 mph. The combination of warm, dry, and windy conditions ahead of a cold front will result in critical fire weather conditions this afternoon and evening. * AFFECTED AREA...Fire Weather Zones 317 Weston County Plains, 321 Southern Black Hills, 322 Fall River County Area, 325 Custer County Plains, 326 Pine Ridge Area, 332 Badlands Area, 333 Bennett County Area, 334 Mellette and Todd Counties and 335 Tripp County. * WINDS...West 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 13 percent. * IMPACTS...The combination of gusty winds and low relative humidity would produce critical fire weather conditions.