Warmer temperatures will begin to return to our area after the cool down in the beginning of the week. Significant warm air advection starting Thursday will bring 850 mb temperatures from below 0 degrees C at the beginning of the forecast period to above 9 degrees by Sunday.
Starting late Friday evening and continuing through Sunday there will be a chance for precipitation in Indiana. Rainfail totals will remain fairly low across the state, with less than 0.25 cm predicted for the three day period. Though our region will not see heavy precipitation, the west coast will be impacted due to a deep low pressure system off the coast - highest rainfall totals are over 14 cm in N. California.
This precipitation is likely due to scattered convection rather than large scale synoptic patterns. The upper level jet begins to move northward at the beginning of the period, leaving Indiana in the region of upper level convergence. There is a slight area of higher vorticity associated with a shortwave trough but generally synoptic patterns are not conducive for upward vertical motion and precipitation.