As a major winter storm prepares to arrive in the region, the Natural Resources Conservation Service February Water Supply Outlook shows most of Western Oregon has a snowpack ranging from 50 to 70 percent of normal.  The Hood, Sandy, and Lower Deschutes basin snowpack was at 51 percent of normal as of mid-week, the lowest figure in the state.  The basins were also the driest in the state for January precipitation at 53 percent of average.  Elsewhere January precipitation was 70 to 80 percent of average.  Eastern Oregon is faring much better, with snowpack at 80 to 100 percent of normal for this time of year.