The National Weather Service in Pleasant Hill has provided new information Friday morning on the upcoming storm that will track through northern Missouri Friday and Friday night. The weather service on Thursday had originally issued a Winter Weather Advisory for counties along the Iowa/Missouri border; however, on Friday morning the Winter Weather Advisory has shifted to the south while a Winter Storm Warning has been issued for some counties along the Iowa/Missouri border extending to the south and east. A Winter Weather Advisory will go into effect at 6 pm this evening and run through noon on Saturday for the following counties:  Grundy, Linn and Livingston counties.  Residents in those counties can expect a total snow accumulation of 3 to 7 inches. Counties to the south and west are also under the advisory from Midnight tonight until 6PM tomorrow. A Winter Storm Warning will go into effect at 3 pm Friday and continue until noon on Saturday for the following counties: Adair, Macon and Sullivan Counties.  Residents in the warned area can expect a total snow accumulation of 5 to 8 inches. Residents in both areas of the Winter Weather Advisory and Winter Storm Warning can expect slippery road conditions as the storm builds in strength. Patchy blowing snow could significantly reduce visibility so use caution and plan extra time if traveling through the warned areas.  Snow is expected to continue through the day Saturday before ending from north to south during the afternoon. The Missouri Department of Transportation provides a traveler information map indicating current road conditions.  The map is updated frequently and is available 24-hours per day.  Road conditions can be obtained by phone at 888 – ASK MODOT (275-6636).