The National Weather Service Missoula Office has issued a winter storm warning, effective from 10 a.m. on Saturday, Feb. 17, through 4 a.m. on Sunday, Feb. 18. Impact within region to be eastern portion of Idaho County. Plan on difficult travel conditions. Tree branches could fall. Be prepared for reduced visibilities at times.February 16, 2018 2:37 p.m. read more..