Area Forecast Discussion
Issued by NWS Marquette, MI

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FXUS63 KMQT 211930

Area Forecast Discussion
National Weather Service Marquette MI
330 PM EDT Wed Mar 21 2018

.SHORT TERM...(This evening through Thursday)
Issued at 330 PM EDT WED MAR 21 2018

Overall, the quiet weather is expected to persist as high pressure
extending southwest from the Hudson Bay maintains its grip on the
region. Across Upper Michigan today, vacating upper-level clouds
allowed insolation to increase from west to east, with afternoon
temperatures climbing mainly into the upper 20s to mid 30s. Upstream
of the region earlier this morning, an advancing shortwave fostered
the development of light snow showers across the Upper Mississippi

Over the next 24 hours, dry air and high pressure will win out. This
means we will have another cold night, especially across the
interior. Given the clear skies and light winds expected, did go
with the colder bias corrected guidance for overnight lows. Across
the interior central, we could see a few locations that drop down to
around or just below zero. Tomorrow will be similar to today, but
temperatures are expected to be warmer. Across the south central,
where downsloping northwest flow will aid in additional warming,
expect temperatures to climb into the low 40s. Elsewhere,
temperatures will remain in the 30s with the cooler temperatures
expected near Lake Superior and across the east.

.LONG TERM...(Thursday night through Wednesday)
Issued at 240 PM EDT WED MAR 21 2018

Troughing and a closed 500 mb low off the pacific nw coast and
troughing in New England and the lower Great Lakes will occur 00z
Fri with ridging over the plains. The ridging will move into the
upper Great Lakes on Sat. Overall, did not make many changes to the
going forecast.

In the extended, GFS and ECMWF show a 500 mb ridge over the upper
Great Lakes 12z Sun with a trough over the wrn U.S. The ridge moves
to the ern U.S. 12z Mon with a trough in the Rockies and the pattern
remains the same into Tue. Troughing moves into the northern plains
12z Wed and moves into the upper Great Lakes late Wed. Temperatures
will remain near normal for this forecast period with system pcpn
monday night into Tue.

.AVIATION...(For the 18Z TAFS through 18Z Thursday afternoon)
Issued at 155 PM EDT WED MAR 21 2018

VFR conditions are expected over the next 24 hours. Tonight winds
will be come light and variable at most TAF sites.

.MARINE...(For the 4 PM Lake Superior forecast issuance)
Issued at 330 PM EDT WED MAR 21 2018

High pressure center over the Hudson Bay will continue to extend
southwest across Lake Superior, allowing winds to remain under 20
knots through Friday afternoon. Late Friday through Saturday, west
winds will increase to 20 to 30 knots, especially across the west
half of the lake, as the surface pressure gradient becomes enhanced
due to a reinforcing area of high pressure digging across Ontario.
Towards the latter half of the weekend into early next week, winds
will become south-southeasterly at speeds between 15 and 25 knots.

Upper Michigan...
Lake Superior...
Lake Michigan...


SHORT TERM...Ritzman
MARINE...Ritzman is the U.S. government's official web portal to all federal, state and local government web resources and services.