YONKERS - Residents looking for rock salt for their driveways might be out of luck, as many hardware stores in north Westchester are sold out. 

Store owners tell News 12 that because the weather has been brutal in so many parts of the county, their suppliers can't keep up with the growing demand. 

One store says it has sold more salt in the last two weeks than the whole month of January. 

A winter storm warning has been issued for the Hudson Valley though 10 a.m. Friday. Meteorologists predict between 5 to 8 inches of snow south of I-287 and 8 to 14 inches north of I-287.