Area Forecast Discussion
Issued by NWS Huntsville, AL

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000
FXUS64 KHUN 300509
AFDHUN

Area Forecast Discussion
National Weather Service Huntsville AL
1209 AM CDT Fri Sep 30 2016

.UPDATE...
For 06Z TAFs.

&&

.DISCUSSION...
(Issued 954 PM CDT Thu Sep 29 2016)
Latest IR satellite data indeed confirms that the broken-overcast
deck of stratocumulus clouds -- which covered the region for most
of the afternoon -- has dissipated. Conditions will become
increasingly favorable for development of fog after Midnight, as
clear skies and presence of surface ridge axis/calm winds provide the
ingredients for radiational cooling. However, based on dry soil
conditions and potential for additional cloud cover to spread across
region from the northwest, we will only include patchy fog at this
point -- with a slightly greater coverage possible in river valleys
around sunrise. Otherwise, minimum temperatures were adjusted
downward across portions of southern TN and ne AL based on current
trends in obs. Remainder of the short term grids are on track with no
changes required at this point.

70/DD

&&

.AVIATION...
For 06Z TAFs: Nocturnal satellite imagery suggests that a lower
stratus deck continues to develop from wrn TN sewd into nrn AL, due
to weak lift south of an upper low across central KY. Thus, we will
include BKN025 as prevailing sky cond thru 30/14Z, although stratus
deck may take a bit longer to fill in than currently indicated. Cigs
may briefly fall to arnd 1500 ft btwn 10-13Z, and will include this
in a tempo group at both terminals. Brief vsby reductions may also
occur in a few locations overnight, but winds in the 2-4 knot range
and dry soil conds will limit this threat sufficiently to not include
in either TAF. Stratus deck will begin to lift/scatter by 14Z, and
diminish further after 01/03Z. Lgt wnw sfc flow is expected during
the day tomorrow, with winds bcmg lgt/vrbl tomorrow evening.

70/DD

&&

.HUN WATCHES/WARNINGS/ADVISORIES...
AL...NONE.
TN...NONE.

&&

$$

For more information please visit our website
at weather.gov/huntsville.



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