Area Forecast Discussion
Issued by NWS Green Bay, WI

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FXUS63 KGRB 192044
AFDGRB

Area Forecast Discussion
National Weather Service Green Bay WI
244 PM CST Mon Feb 19 2018

Forecast discussion for routine afternoon forecast issuance

.SHORT TERM...Tonight
Issued at 244 PM CST Mon Feb 19 2018

A mix of snow, sleet and freezing rain was noted across much of
the region. The only exception was across portions of Waushara,
Winnebago, Calumet and Manitowoc counties where air temperatures
were still several degrees above freezing. Road temperatures well
above freezing from Wautoma to Green Bay/Fox Cites east to the
lake. This should change quickly tonight once the sun goes down.
Latest road temperature forecast have road temperatures dropping
below freezing early this evening, thus motorist should anticipate
slick conditions. To the north and west of the Fox Valley, a mix
of snow, sleet and freezing rain was occurring.

For tonight, the steadier precipitation should taper off by mid
evening to freezing drizzle, except across the far north where
some light snow is possible. Some of the latest model guidance
would suggest there could be a few hours where they may be no
precipitation. However, think freezing drizzle will be back on
the increase again late tonight as the next system approaches from
the southwest. Did make some adjustments downward to minimum
temperatures since we were already close to the forecast values.

.LONG TERM...Tuesday Through Monday
Issued at 244 PM CST Mon Feb 19 2018

Starting with the Tuesday period, progs indicate another wave of
mixed precipitation will slide over the area mainly tuesday
morning. Precipitation will be along and ahead of the 850 frontal
boundary sliding over the area. Forecast soundings, another round
of ice accumulation up to 0.10 inches. Trends has been a bit
quicker and its possible later shifts will be able to cancel the
winter weather advisory a bit quicker Tuesday afternoon. Roads may
be a mess from the morning pcpn for another reason to linger the
advisory.

High pressure to settle into the area Wednesday into Thursday for
a period of quiet weather. Models in better agreement with the
timing of the next chance of mainly snow towards Thursday night
into Friday morning as a weak trough slides over the area. Some
trend with a southwest flow aloft developing with upper heights
increasing late next weekend, for a turn to a milder trend.
&&

.AVIATION...for 18Z TAF Issuance
Issued at 1107 AM CST Mon Feb 19 2018

A cold front will slowly sag south over the area today
into tonight. Widespread IFR cigs north of the front will spread
over central and east central Wisconsin as the front slides south.
precipitation type will mainly be snow across the north...turning
to light freezing rain or drizzle near the front and rain or
drizzle south of the front. The rain or drizzle will transition to
a freezing rain or freezing drizzle variety later this afternoon
and evening as surface temperatures fall below freezing.

A period of gusty northeast winds to 25 or 30 mph will occur in
the Fox Valley and lakeshore areas as the front slides through,
then subsiding this evening.
&&

.GRB WATCHES/WARNINGS/ADVISORIES...
Winter Weather Advisory until 6 PM CST Tuesday for WIZ038>040-
045-048>050.

Winter Weather Advisory until 6 PM CST Tuesday for WIZ005-
010>013-018>022-030-031-035>037-073-074.
&&

$$

SHORT TERM.....Eckberg
LONG TERM......TDH
AVIATION.......TDH



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