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Area forecast discussion
National Weather Service Green Bay WI
639 am CDT Fri Aug 23 2019

Updated aviation portion for 12z taf issuance

Short Saturday
issued at 331 am CDT Fri Aug 23 2019

No significant weather impacts expected in the short-term portion of
the forecast.

A surface high pressure system centered over northern WI into
Ontario, will drift very slowly eastward through the day Saturday.
At the same time, an upper-level ridge will steadily build eastward
across the area today and the ridge axis will cross northeast WI
Saturday. The combination of these features and very dry air in
place, will lead to fairly quiet conditions over the next few days.
The main concern with this setup will be cooler overnight lows and
the potential for some patchy ground fog to develop overnight into
the early morning hours. Highs today and Saturday will be mainly in
the 70s with overnight lows dropping into the 40s to around 50. It
is not out of the question that the typical colder spots could see a
couple of upper 40 degree readings.

Long term...Saturday night through Thursday
issued at 331 am CDT Fri Aug 23 2019

The mostly quiet and cooler than normal conditions during the
short term will give way to slightly warmer temperatures for the
latter half of the weekend into the middle of next week. Chances
for showers and storms arrive Monday and continue through Monday
night as a cold front moves across Wisconsin and a mid level
trough also passes. Cyclonic flow behind these departing features
will bring small chances for showers and thunderstorms at times
into the middle of the week. Cooler temperatures should then
arrive for the latter half of the week.

Aviation...for 12z taf issuance
issued at 639 am CDT Fri Aug 23 2019

VFR conditions expected through much of the period. Scattered fair
weather cumulus clouds are expected to develop this afternoon,
generally between 3,500 and 5,000 feet after 16z. The loss of
daytime heating will lead to a quick loss of cloud cover in the
evening. Some shallow ground fog may form late tonight into early
Saturday morning, mainly toward the rhi taf site.

Grb watches/warnings/advisories...

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