Avisos

Wind Advisory issued September 29 at 12:52AM MDT until September 30 at 12:00PM MDT by NWS Rapid City SD* WHAT...Northwest winds 25 to 35 mph with gusts up to 55 mphexpected.* WHERE...Portions of northwestern and southwestern South Dakota.* WHEN...From 11 PM this evening to noon MDT Monday.* IMPACTS...Sudden wind gusts can cause drivers to lose control,especially in lightweight or high profile vehicles. Strong windscan cause blowing dust, reduced visibility, and flying debris.Winds this strong can make driving difficult, especially for highprofile vehicles. Use extra caution.

National Weather Service

Red Flag Warning issued September 29 at 1:07AM MDT until September 30 at 8:00PM MDT by NWS Rapid City SD...CRITICAL FIRE WEATHER CONDITIONS TODAY THROUGH MONDAY WITHGUSTY WINDS AND LOW RELATIVE HUMIDITY ACROSS NORTHEAST WYOMING ANDWESTERN SOUTH DAKOTA....Gusty south to southwest winds will develop this afternoon,especially over western South Dakota where winds will gust over 40mph. Further west over the Black Hills area and northeastWyoming, winds will not be as strong, but deeper mixing willallow for frequent gusts to 30 mph. RH will drop 15 percent orbelow this afternoon, which will result in critical fire weatherconditions. Poor RH recovery is expected tonight. A cold frontwill then cross the region tonight, supporting gusty northwestwinds through Monday. Portions of western South Dakota will seegusts of over 50 mph. RH will fall to below 20 percent Monday,especially over southwest to south central South Dakota,supporting continued critical fire weather conditions.* AFFECTED AREA...Fire Weather Zones 323 Northern Foot Hills,324 Eastern Foot Hills, 325 Custer County Plains, 326 PineRidge Area, 327 Butte County Area, 328 Perkins County, 329West Central Plains, 330 Ziebach County, 331 Haakon CountyArea, 332 Badlands Area, 333 Bennett County Area, 334 Melletteand Todd Counties and 335 Tripp County.* WINDS...Southwest 20 to 30 mph with gusts up to 45 mph today,increasing to 25 to 35 mph with gusts up to 55 mph this evening.Winds will then shift northwest behind a cold front aftermidnight and remain gusty Monday.* RELATIVE HUMIDITY...As low as 10 percent.* IMPACTS...The combination of gusty winds and low relativehumidity would produce critical fire weather conditions.A Red Flag Warning means that critical fire weather conditionsare either occurring now, or will shortly. A combination ofstrong winds, low relative humidity, and warm temperatures cancontribute to extreme fire behavior.

National Weather Service