Area Forecast Discussion
Issued by NWS Green Bay, WI

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078
FXUS63 KGRB 270315
AFDGRB

Area Forecast Discussion
National Weather Service Green Bay WI
1015 PM CDT Wed Jul 26 2017

Updated aviation portion for 06Z TAF issuance

.SHORT TERM...Tonight and Thursday
Issued at 241 PM CDT Wed Jul 26 2017

A cold front will bring showers and scattered thunderstorms to
central and east central Wisconsin during the late afternoon and
early evening hours. Abundant cloud cover held temperatures down today
and has limited instability. Therefore, the severe thunderstorm threat
is very small.

Clouds will clear from northwest to southeast tonight as drier air
arrives behind the front. Wet ground from recent rains may produce
some ground fog in places later tonight, though increasing northeast
winds in the boundary layer should limit dense fog to the usual
foggy places. Lows will be close to normal for this time of year.

Thursday will start out sunny, but clouds will increase as an
upper trough approaches in the afternoon. Looks like a good set up
for scattered showers, especially in central and northcentral
Wisconsin. A temperature inversion around 700mb will probably
prevent thunderstorms, though they are not out of the question.

.LONG TERM...Thursday Night Through Wednesday
Issued at 241 PM CDT Wed Jul 26 2017

The active weather pattern will make it`s exit late Thursday night
as high pressure moves into the region for most of the weekend.
Dry and mostly sunny conditions are expected across the area
Friday and well into Sunday. A weak boundary coupled with an upper
level disturbance will bring the next chance for rain and isolated
thunderstorms into the region Sunday night into Monday morning.

A more active period then kicks off again as northwesterly flow
returns next week. A few rounds of showers and thunderstorms will
then be likely through the midweek.

Temperatures through the period will remain seasonal and fairly
steady before potentially dropping a few degrees next week behind
a cold front.
&&

.AVIATION...for 06Z TAF Issuance
Issued at 1012 PM CDT Wed Jul 26 2017

Scattered showers along a cold front will exit the region during
the early overnight hours. Behind the front, clearing skies are
expected from north to south. Patchy dense ground fog could form
late tonight over central, north-central, and far northeast WI.
It would likely dissipate by 14z Thursday. After a short period
of clear conditions once any fog burns off, clouds will build
again by midday, with isolated showers developing during the
afternoon. Coverage does not appear widespread enough to include
in the tafs at this time.

&&

.GRB WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

$$

SHORT TERM.....RDM
LONG TERM......Uhlmann
AVIATION.......MPC



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