...CRITICAL FIRE WEATHER CONDITIONS THROUGH THIS EVENING ACROSS PORTIONS OF NORTHEASTERN WYOMING AND WESTERN SOUTH DAKOTA... .Warm, very dry, and windy weather will support critical fire weather conditions over portions of northeastern Wyoming and western South Dakota through this evening. * AFFECTED AREA...Fire Weather Zones 315 Southern Campbell, 317 Weston County Plains, 320 Central Black Hills, 321 Southern Black Hills, 322 Fall River County Area, 324 Eastern Foot Hills, 325 Custer County Plains, 326 Pine Ridge Area, 329 West Central Plains and 332 Badlands Area. * WINDS...West 20 to 30 mph with gusts up to 50 mph, strongest across far southwest SD. * RELATIVE HUMIDITY...As low as 10 percent. * IMPACTS...The combination of gusty winds and low relative humidity will produce critical fire weather conditions.