Area Forecast Discussion
Issued by NWS Green Bay, WI

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FXUS63 KGRB 272300

Area Forecast Discussion
National Weather Service Green Bay WI
600 PM CDT Thu Jul 27 2017

Updated aviation portion for 00Z TAF issuance

.SHORT TERM...Tonight and Friday
Issued at 233 PM CDT Thu Jul 27 2017

An upper trough over northern Minnesota at 2000 UTC will
drop across Wisconsin tonight. The air is quite dry, but scattered
showers are possible during the late afternoon and early evening across
northcentral and central Wisconsin.

There will probably be enough low level dry air and middle clouds
around to prevent fog in most places. Lows will be a few degrees
below normal for this time of the year.

Friday should be nice for outdoor activities, with comfortable temperature
and humidity and mostly sunny skies.

.LONG TERM...Friday Night Through Thursday
Issued at 233 PM CDT Thu Jul 27 2017

Models continued to show the general western CONUS ridge, eastern
trough pattern continuing through next week. Dry conditions are
expected with surface high pressure over the region. As the high
drifts toward the east there is a slight chance for some showers
and possibly a few thunderstorms across northern Wisconsin Sunday
afternoon and again on Monday in return flow between the departing
high and an approaching front. Anything that does manage to
develop should die off by evening as instability wanes. The best
chance for thunderstorms appears to start late Tuesday in far
north central Wisconsin, and across the rest of the area Tuesday
night and Wednesday as a cold front passes through Wisconsin. A
slight chance for showers and storms will linger across parts of
the area on Thursday due to model differences and the averaging of
their PoPs.

High temperatures are expected to be near or a few degrees above
normal through the end of the forecast period.

.AVIATION...for 00Z TAF Issuance
Issued at 600 PM CDT Thu Jul 27 2017

Scattered to broken VFR cumulus clouds are expected through mid to
late evening, mainly west of the Fox Valley. Once these clouds
dissipate, patchy ground fog is possible late tonight in the
usual foggy/cold places. Great flying weather Friday through
Sunday with mostly clear skies and light winds.




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