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FXUS63 KMQT 212332

Area Forecast Discussion
National Weather Service Marquette MI
732 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 00Z TAFS through 00Z Thursday evening)
Issued at 717 PM EDT WED MAR 21 2018

VFR conditions will prevail at all TAF sites overnight and tomorrow. 
Light and variable winds are expected overnight before becoming 
predominantly north to northwesterly (but still below 10 kts) during 
the morning and afternoon hours Thursday.

.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...


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