Our forecast is about to do a 180! Medium range modeling has shown just enough of an eastward shift in the upper pattern for late in the week into the weekend to have an impact on the local weather. Yesterday morning, the medium range models indicated that the deeper moisture plume moving northward around the west end of surface high pressure across east Texas and western Louisiana would keep more concentrated rainfall west of the local area. This morning`s solutions have shifted that a bit eastward. Precipitable water values are expected to increase to above 2 inches areawide Wednesday.