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.
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Last Update: 345 AM EDT Fri Sep 21 2018

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Norton, MA Local Forecast Office

20NM W Hyannis MA

Marine Zone Forecast

...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH

Synopsis: ANZ200-212015- 345 AM EDT Fri Sep 21 2018 .Synopsis for Massachusetts and Rhode Island coastal waters... High pres moves east of the waters today. A cold front will sweep across the waters late tonight and early Sat with pre- frontal gale force S-SW winds tonight. High pres will build east from the Great Lakes this weekend with a reinforcing high pres building over Quebec Mon, which will shift east toward Nova Scotia on Tue. For information on possible hazardous weather beyond the 24-36 hour forecast period, please visit www.weather.gov/boston and follow the Current Hazards link above the map on the left. $$

Today
SE winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt this afternoon. Seas around 2 ft.
Tonight
SW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. A chance of showers.
Sat
W winds 15 to 20 kt with gusts up to 30 kt, becoming N 10 to 15 kt in the afternoon. Seas 2 to 4 ft.
Sat Night
NE winds 5 to 10 kt. Seas 1 foot or less.
Sun
N winds 5 to 10 kt. Seas 1 foot or less.
Sun Night
NE winds around 5 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas around 2 ft.
Mon
NE winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft.
Mon Night
E winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft.
Tue
E winds 10 to 15 kt with gusts up to 25 kt. Seas around 2 ft. A chance of showers.
Tue Night
S winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. A chance of showers. seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height.
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ABOUT THIS FORECAST

Last Update: 345 AM EDT Fri Sep 21 2018
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