Area Forecast Discussion
Issued by NWS Green Bay, WI

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FXUS63 KGRB 162316

Area Forecast Discussion
National Weather Service Green Bay WI
616 PM CDT Mon Apr 16 2018

Updated aviation portion for 00Z TAF issuance

.SHORT TERM...Tonight and Tuesday
Issued at 226 PM CDT Mon Apr 16 2018

Although the historic snowstorm has come to an end across the
region, scattered light snow showers and flurries may linger
across the area tonight as the area remains under cyclonic flow
with additional shortwaves embedded in the flow. Despite this,
additional snowfall totals are expected to be little to none
across much of the region. The main exception could be Vilas
County where the Lake Superior snowbelt could squeeze out an inch
or two overnight. Although the fresh snow cover would normally
mean very cold overnight lows, winds should stay up overnight with
mostly cloudy skies for much of the night which should keep
overnight lows in the lower to middle 20s. These supposedly warmer
than expected lows are still a good 10 degrees below normal for
this time of year.

Some snow showers may linger across the Lake Superior snowbelt on
Tuesday as some mid-level ridging works its way in from the west.
Despite this ridging there will still be a lot of clouds to be had
over most of the area as low level moisture gets caught underneath
the inversion. Temperatures on Tuesday should moderate a bit, with
highs in the middle to upper 30s, or about 15 degrees below normal
for this time of year.

.LONG TERM...Tuesday Night Through Monday
Issued at 226 PM CDT Mon Apr 16 2018

The main focus of the long term will be the midweek system set to
pass just south of the region Wednesday and Wednesday night.
Otherwise a warming trend is in store for the region.

The next weather system will arrive in the region during the
morning on Wednesday, bringing with it a mix of precipitation. The
northern edge of the warm front should kick of precipitation,
with enough cold air near the surface to get some freezing
drizzle, sleet, or snow across the area. As the afternoon
temperatures rise, conditions should shift over to rain for
portions of the area, although there may be some snow mixed
depending on where the cold air wraps in behind this system.
Precipitation type issues then continue into the overnight hours
as we cool down and switch to primarily snow for precipitation.
Some wintry mix will be possible again before the system departs
Thursday morning. Accumulations on the are expected to be minor
Wednesday morning, as rain and rising temperatures help melt any
new snow. By the evening, an inch or two of snowfall will have
been possible in the areas that stay in the colder air.

Dry conditions are expected to return on Thursday and last through
the period as a warming trend continues into next week.
Temperatures over next weekend will still be 5 to 10 degrees below
normal in some areas however.

.AVIATION...for 00Z TAF Issuance
Issued at 616 PM CDT Mon Apr 16 2018

Cloudy skies and scattered snow showers or flurries are expected
tonight. Ceilings will generally range from 2500 to 3500 feet,
with the lowest in the north. MVFR ceilings expected through
around noon Tuesday and then mostly VFR.



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