Area Forecast Discussion
Issued by NWS Marquette, MI

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FXUS63 KMQT 211744

Area Forecast Discussion
National Weather Service Marquette MI
1244 PM EST Tue Nov 21 2017

.SHORT TERM...(Today and tonight)
Issued at 252 AM EST TUE NOV 21 2017

Upper air pattern consists of a 500 mb ridge on the west coast, a
trough on the Gulf Coast, a trough dropping into the upper Great
Lakes this morning. This trough digs into the lower Great Lakes
tonight. Moisture quickly moves through the area today along with
some lake effect pcpn. Basically, going forecast has things well in
hand and did not make too many changes to the going forecast.

.LONG TERM...(Wednesday through Monday)
Issued at 355 AM EST TUE NOV 21 2017

Some lingering light LES Wed, but nothing of significance as it
will be weakening and shifting offshore.

Attention turns toward a late week system that models currently show
moving across southern Canada. Main threat from this system will be
gusty winds (possibly approaching advisory criteria in some spots)
both ahead of and behind the low, but details with that will be
dependent on track and strength which are both still in question.
Thermal profiles will support rain until after the cold front/SFC
trough moves through late Fri, but synoptic QPF looks like it will
be out of the area by that time.

Light to moderate LES looks likely for the weekend in NW wind
snowbelts as 850mb temps fall to around -15C.

.AVIATION...(For the 18Z TAFS through 18Z Wednesday afternoon)
Issued at 1243 PM EST TUE NOV 21 2017

The gusty winds leading to some blsn at KIWD/KCMX will diminish this
afternoon. While MVFR conditions should prevail, expect some periods
of IFR and possibly some LIFR vsby at KCMX where winds will be
strongest, producing more blsn. Conditions will improve to VFR at
KSAW late this evening and by Wed morning at KIWD/KCMX.

.MARINE...(For the 4 AM Lake Superior forecast issuance)
Issued at 252 AM EST TUE NOV 21 2017

A strong low pressure system will track eastward just north of Lake
Superior this morning. NW gales of 35 to 45 knots across much of
Lake Superior will continue today. Winds will diminish to under 25
knots while becoming westerly through Wednesday morning, before
backing to SW winds of 20 to 30 knots Wednesday night. Westerly
winds of 20 to 30 knots Thursday will back to the south on Friday.
Another strong low pressure system will then bring the potential for
northwest gales of 35 to 40 knots Friday night into Saturday.

Upper Michigan...
  Wind Advisory until 1 PM EST this afternoon for MIZ001-003.

  Lakeshore Flood Advisory until 9 PM EST this evening for MIZ006.

Lake Superior...
  Gale Warning until 10 PM EST this evening for LSZ243>245-248>251-

  Gale Warning until 5 PM EST /4 PM CST/ this afternoon for LSZ162-

  Gale Warning until 4 PM EST this afternoon for LSZ246-247.

Lake Michigan...


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