Area Forecast Discussion
Issued by NWS Nashville, TN

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FXUS64 KOHX 200823
AFDOHX

Area Forecast Discussion
National Weather Service Nashville TN
323 AM CDT Wed Sep 20 2017

.DISCUSSION...

Patchy dense fog expected through 8 or 9 am this morning. We have
issued a sps to address this. Otw, for today, we will keep low pops
going again this afternoon and Thursday afternoon as well. With the
developing upper ridge axis remaining to our west, a northerly ul
wind component will prevail. Furthermore, a slight degree of
curvature and shear will attempt to move southward over western TN
today. Again, will include 20 pops.

Another round of patchy fog for late tonight can be expected. Model
12z dewpoint depressions are not overly impressive but will adhere
to isc graphics and include the fog.

In the ext fcst, strong upper ridging will lift northward across the
rust belt during the weekend. An easterly wave will eject westward
in advance of "Maria" but the moisture will be limited so the
extended will remain basically dry. Maria is still expected to curve
off to the north and be a non-factor for the mid state.

For our temperatures, the warm pattern to continue through the next
7 days. Heights will remain elevated with 850 mb temps continuing to
run in the 15c-18c range. This will equate to temperatures a good 5
to 10 degrees above normal. It does, however,  appear that a cool
down may be in the works toward the end of next week.


&&

.AVIATION...
06Z TAF DISCUSSION.

With temperatures and dew point depressions falling, and the rain
earlier, dense fog is a good possibility at KCSV. Have dropped KCSV
to 1/2SM and it could be worse due to the rain yesterday. Have
included MVFR for KCKV/KMQY, but I have kept KBNA out of the mix
with VFR conditions.

Winds will be very light to calm throughout this TAF cycle. Mainly
a southwesterly breeze, if any, during Wednesday afternoon is
expected.


&&

.PRELIMINARY POINT TEMPS/POPS...
Nashville      88  70  88  69  88 /  20  10  20  10  10
Clarksville    88  68  89  68  88 /  20   0  20  10  10
Crossville     82  67  84  66  84 /  20  10  20  10  10
Columbia       89  69  89  68  88 /  20  10  20   0  10
Lawrenceburg   88  68  88  68  88 /  20  10  20  10  20
Waverly        88  69  88  68  88 /  20   0  20   0  10

&&

.OHX WATCHES/WARNINGS/ADVISORIES...
NONE.

&&

$$

DISCUSSION......21
AVIATION........07



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