FXUS64 KMRX 180918

Area Forecast Discussion
National Weather Service Morristown TN
418 AM EST Mon Dec 18 2017

.SHORT TERM...(Today and Tonight)...
Some very light drizzle is getting squeezed out of the atmosphere
early this morning. But the biggest story is the widespread fog
over the area, with most locations seeing visibilities in 1/2 to 2
mile range. Low level clouds over us are helping to keep
temperatures a bit warmer, which should hopefully stave off dense
radiation fog from forming. This should last into the morning
with the low clouds helping to block out some of the sun and
keeping the fog around. Eventually the sun should be able to peak
through in some locations and we will begin to warm into 50's in
the Valley.

.LONG TERM...(Tuesday through Sunday)...
Active weather pattern will keep region wet through most of the
extended period. Dry early Tuesday but surface low pressure moving
from East Texas then across Mississippi Valley to the Southern
Tennessee Valley Tuesday afternoon brings with it a lot of
rain...especially southern parts of the forecast area late Tuesday
night through Wednesday morning...some sections of southern
Tennessee and southwest North Carolina could see over 2 inches of
rainfall. This slow moving surface low and cold front will exit by
Wednesday night then skies clear as surface high builds in from
the Ohio Valley. Fair weather will be short lived and only last
through Thursday evening as another frontal system moves into the
plains states Thursday and then heads for the southern Great Lakes
Friday. Clouds increase overnight Thursday and with good
southerly flow ahead of the system Friday showers will become
likely Friday and Friday night. A secondary front behind the first
front will allow for extended rain chances through Saturday and
with the front becoming stationary just to the southeast a
continued chance of showers through Sunday. Temperatures will stay
mild through Christmas Eve. Highs Tuesday should reach the 50s to
near 60. It will cool somewhat Wednesday with temperatures mid
40s northeast to upper 50s to near 60. For the remainder of the
forecast highs stay mostly in the 50s with lows in the 40s to
lower 50s early Wednesday and then cool to the 30s to lower 40s
Thursday and Friday and 40s for the weekend


Chattanooga Airport, TN 59 46 61 54 / 10 10 60 90
Knoxville McGhee Tyson Airport, TN 57 43 60 50 / 10 0 40 80
Oak Ridge, TN 57 43 59 49 / 10 10 40 80
Tri Cities Airport, TN 55 39 59 45 / 20 10 30 60




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