Severe Thunderstorms Possible for the Great Lakes into Ohio Valley; Heavy to Excessive Rainfall Over the Southern Plains

Severe thunderstorms will race along a cold front from the Upper Mississippi Valley into the Great Lakes and Ohio Valley with the main threat being damaging winds. The tail end of this front will possibly produce heavy to excessive rainfall across the southern Plains into the Lower Mississippi Valley through Saturday. Finally, Major-to-record river flooding continues across the Carolinas.

Coastal Waters Forecast for Harbor Beach to Port Sanilac MI (LHZ442) (Text-Only)
NWS Forecast for: Harbor Beach to Port Sanilac MI (LHZ442)
Issued by: National Weather Service Detroit/Pontiac, MI
Last Update: 355 AM EDT Fri Sep 21 2018

Today: Southwest winds 15 to 20 knots with gusts to 30 knots becoming west to 30 knots with gusts to 40 knot gales. Partly cloudy. A slight chance of showers and thunderstorms late in the morning. A chance of light showers and a slight chance of thunderstorms early in the afternoon. Waves 3 to 5 feet. Waves occasionally around 7 feet.

Tonight: Northwest winds to 30 knots with gusts to 35 knot gales becoming north 20 to 25 knots with gusts to 30 knots after midnight. Partly cloudy. Waves 4 to 6 feet building to 6 to 9 feet after midnight. Waves occasionally around 12 feet.

Saturday: North winds 15 to 20 knots becoming northeast 5 to 10 knots. Partly cloudy in the morning then clearing. Waves 4 to 6 feet subsiding to 2 to 4 feet late in the afternoon. Waves occasionally around 8 feet.

Saturday Night: Light and variable winds becoming southwest 5 to 10 knots in the late evening and overnight. Clear. Waves around 2 feet or less. see lake huron open lake forecast for days 3 through 5.

Zone Forecast: Harbor Beach to Port Sanilac MI (LHZ442)

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