The Old Closed Upper Low

The pesky old cut off upper low continues to circulate over the Stateline. It is responsible for the cool temperatures, clouds, and scattered showers. Temperatures will drop off into the middle 40's tonight under mostly cloudy skies with light northeasterly winds. On Sunday and Sunday night rain showers will be likely, and there could be some isolated thunderstorms.  The models are printing out some surprising precipitation forecasts for the next 2 days with totals around 1.25".  That is hard to believe, but this weather pattern is highly unusual, and the upper low is expected to draw a new surface low from the southern plains right into the Stateline.  It will remain cool with showers off and on, and highs in the 60's through Tuesday.  By Wednesday the upper low will be much weaker, and what's left of the system will be swept off to the east as the westerlies take over.  Wednesday should be mostly sunny and warmer with a high in the low 70's. On Thursday, high pressure will be in control, and it will be located over the Tennessee river valley.  It will be sunny with a southerly wind allowing afternoon temperatures to reach the  middle 70's.  The next cool front will pass through the Stateline on Thursday night along with a slight chance of showers.  The Canadian air behind the front is not exceptionally cool, so temperatures will drop back into the 60's for highs on Friday and Saturday with plentiful sunshine.