This was fun one to track:
WHEN LOOKING AT REGIONAL PRESSURE TRACES OVER THE PAST 24 HOURS, THE PATH OF THE CENTER OF THE LOW HAS BEEN ON THE VERY SOUTHERN END OF ENSEMBLE CLUSTER PATHS WITH A NOTABLE SOUTHERN TREND ESTABLISHED IN EACH SUCCESSIVE ENSEMBLE MEAN FORECAST OVER THE PAST FOUR SUCCESSIVE RUNS. AS A RESULT, THE DEFORMATION "COMMA HEAD" REGION IS VERIFYING SOUTHEAST OF ENSEMBLE GUIDANCE, AND IS LARGELY CENTERED FROM THE MISSISSIPPI RIVER TO INTERSTATE 39. AN INTERESTING NOTE THIS MORNING IS THE CLEAR PASSAGE OF SEVERAL MESOSCALE GRAVITY WAVES THROUGH THE DEFORMATION SHIELD, WHICH WAS WELL ADVERTISED BY CAM GUIDANCE 24 HOURS AGO. EACH WAVE WAS MARKED BY A LOCAL INCREASE IN SNOWFALL RATES AND WAKE SUBSIDENCE, AS WELL AS LOCALLY HIGHER WINDS (OVER 60 MPH IN SOUTHEASTERN WISCONSIN).