Area Forecast Discussion
Issued by NWS Green Bay, WI

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FXUS63 KGRB 251726

Area Forecast Discussion
National Weather Service Green Bay WI
1126 AM CST Tue Feb 25 2020

Updated aviation portion for 18Z TAF issuance

.SHORT TERM...Today...Tonight...and Wednesday
Issued at 247 AM CST Tue Feb 25 2020

Surface low staying well to our south will produce gusty northeast
winds today and tonight but little in the way of winter weather.
There could be some lake effect snow showers or flurries along the
Lake Michigan shore and also in northern Vilas county, but little
or no accumulations are expected.

The gusty northeast winds will produce large waves along the Lake
Michigan shore today and tonight, which could cause local flooding
or shoreline erosion given the very high lake levels.

Temperatures today will be near or a couple degrees above normal.
Cold advection tonight and Wednesday will make for temperatures
near or a few degrees below normal.

.LONG TERM...Wednesday Night Through Monday
Issued at 247 AM CST Tue Feb 25 2020

The long term will be a mainly quiet period as weak high pressure
moves in behind the departing system. The upper level ridge over
western CONUS will gradually flatten out as a surface low passes
through Canada, which may bring our only chance for some
precipitation towards the end of the extended.

Wednesday night into Thursday, weak surface high pressure will
move through the area. No active weather is expected during this
time period as dry air flows across the region from the northwest.
The one exception may be lake effect snowfall across far northern
Wisconsin, but this will also wane into Friday. Temperatures are
expected to be below normal through Friday.

Rest of the extended... two weak chances for active weather will
pass the region. The first, is a passing clipper system will
progress across Canada. Currently expect dry air to prevail so
left the weekend dry. The second is a low pressure system lifting
north from the central Plains as a shortwave moves across the
region behind the departing ridge. After the colder start Friday,
temperatures will be on the rise into early next week as southerly
flow prevails through the weekend.

.AVIATION...for 18Z TAF Issuance
Issued at 1126 AM CST Tue Feb 25 2020

Fairly quiet conditions expected overall for aviation. The main
concerns will be gusty north-northeast winds today into this
evening along with the potential for intermittent MVFR clouds. The
lower clouds will be most notable along Lake Michigan today into
tonight and downwind of Lake Superior for Wednesday. A few
flurries or light snow showers could still impact MTW and possibly
RHI, but overall impact to visibility should be limited.



LONG TERM......Uhlmann
AVIATION.......Cooley is the U.S. government's official web portal to all federal, state and local government web resources and services.