Greater Chances Of Showers And Thunderstorms....

Forecast Discussion:

Well folks a busy and changing forecast has presented itself this morning.  I do expect a increase chance of showers and thunderstorms today with a approaching upper level disturbance that is producing a MCS across the Ohio Valley this morning.  The air mass across the area if forecasted to be moist and unstable.  This will give way to chances for damaging winds, heavy rain and hail.  This has prompted the Storm Prediction Center to put all of East Tennessee under a slight risk for Severe Storms.  If you have outdoor plans this afternoon please keep a eye to the sky as conditions could change rapidly.  Also be sure to follow us on Twitter or Facebook for updated warnings.  Highs today will be in the lower to mid 90s.

SPC Slight Risk is the area inside the green line updated at 8:40 AM EDT

Now moving forward into Friday and Saturday where the story will be the return of the heat with highs expected to be in the upper 90s with 100s possible is some spots.  These high temperatures coupled with the moist air mass will lead to high heat indices.  There will also be chances of showers and thunderstorms mainly in the higher terrain.  If you have plans for the weekend make sure you drink plenty of water and limit time outdoors.

Twister Data NAM 12Z/8AM forecast for surface temperatures for Saturday at 2 PM EDT

Then going into Sunday through Tuesday we have increase chances for rain with a frontal boundary proged to move south into the Tennessee Valley.  The exact timing of this system is still a little uncertain as models have been some what different.  GFS MOS data does indicate that temperatures will drop into the 80s with some much needed rain occurring across the area.  I will keep you updated on this as forecast becomes clearer on timing.

HPC forecasted Precipitation from Sunday at 8AM to Tuesday at 8AM