Area Forecast Discussion
Issued by NWS Green Bay, WI

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000
FXUS63 KGRB 182324
AFDGRB

Area Forecast Discussion
National Weather Service Green Bay WI
624 PM CDT Mon Jun 18 2018

Updated aviation portion for 00Z TAF issuance

.SHORT TERM...Tonight and Tuesday
Issued at 248 PM CDT Mon Jun 18 2018

The cold front had just moved out of the forecast area by mid
afternoon, though scattered showers remained a bit behind the
front in the still humid air.

Weak low pressure moving along the front might keep scattered
showers across our southernmost counties tonight and Tuesday,
with the remainder of the area remaining dry.

Partial clearing and drier air should allow temperatures to fall
to normal values in the north, with temperatures a few degrees
above normal elsewhere due to cloud cover. Highs Tuesday will be
close to normal with much lower dewpoints than the last couple of
days.

.LONG TERM...Tuesday Night Through Monday
Issued at 248 PM CDT Mon Jun 18 2018

Zonal flow at 500mb will turn to the northwest by late in
the week as the ridge builds across western Canada with
a corresponding downstream trough across eastern Canada
into the New England states. Meanwhile, models in fair
agreement with develop a closed low across the central
plains on Thursday. This system will slowly move towards
the region late in the work week and across portions of
the area on Saturday.

For Tuesday evening, kept a token small pop across our
southern counties with any complex of storms well south
of northeast Wisconsin. Otherwise Canadian high pressure
should prevail across the entire region later Tuesday
night into Friday morning. As typical with these systems,
lowered minimum temperatures, especially across the far
north from Tuesday night through Thursday night. Also,
lowered dewpoints a few degrees, and slightly more in our
sandy soil regions across the north. The next system
approaches from the southwest on Friday and lingers
into Saturday. With most closed lows, concerned that
models are bringing the system in too fast. Severe
weather is not expected with this system.
&&

.AVIATION...for 00Z TAF Issuance
Issued at 620 PM CDT Mon Jun 18 2018

Any lingering MVFR ceilings over central and east central WI
should rise to VFR early this evening, as drier Canadian air
moves into the region. Aside from some patchy MVFR/IFR fog in
north central WI late tonight, VFR conditions should prevail.
Spotty light showers may persist over the southern part of the
forecast area during the TAF period, but should generally remain
south of the TAF sites.

&&

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

$$

SHORT TERM.....RDM
LONG TERM......Eckberg
AVIATION.......Kieckbusch


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