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Area forecast discussion...updated 
National Weather Service Nashville Tennessee
705 PM CDT Friday Oct 9 2015

removed the late this afternoon zone grouping from the zone forecast
product. Latest hrrr short range model really initializes well
with current regional radar mosiac imagery and seems reasonable
in pattern evolution tonight. Believe most of middle state will
experience periods of showers through the remainder of the evening thunderstorm potential has ended in Post frontal air mass across
middle state. Decreasing chances of rainfall are expected across northwest
and west portions of area in vicinity of Tennessee River valley to begin
late this evening. A slow decreasing cloudiness trend will occur
west to east after midnight also as upper level trough moves across
region...with a chance of lingering showers across mainly the
plateau and southern middle state remaining as the early morning hours on
Sat progress. Winds are expected to stay in the 5 to 10 miles per hour range
tonight...but they may die down enough...with clring skies...across
northwest half of middle state to support patchy fog development early morning
through middle morning hours on Sat in at least those locations. Current
temperature trends generally remaining in line with forecasted low temperatures
tonight across the middle state. Will continue to monitor...but did
not make at this time changes to forecasted overnight low values.

Previous discussion...
aviation update...for 00z aviation forecasts

Cold front along the plateau into northwest Alabama with line of
thunderstorms just ahead of front. Broken area of trailing showers
behind the cold front west of Interstate 65 all the way to the
Mississippi River will work eastward this evening. Back edge of
showers should reach Clarksville 05z-06z time frame and Nashville
06z-07z and will be much slower to pull off plateau probably
after 13z-14z. Expect to see VFR conditions return to Clarksville
and Nashville shortly after 15z with MVFR conditions returning at
Crossville shortly after 18z but not likely to go VFR at Crossville
through 00z Saturday evening. Surface high will build in behind
the front keeping northerly flow into the middle state with a few
gusts during the day Saturday.

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