Enhanced Risk for Severe Thunderstorms Across the Upper Midwest; Flash Flooding Possible from the Upper Midwest to Southern Plains and Desert Southwest Through Friday

Portions of the Upper Midwest will see an increased threat for severe thunderstorms through this evening, with a few strong tornadoes possible. The same region remains on alert for additional flash flood concerns. Heavy rainfall may lead to flash flooding across the Desert Southwest today, and Southern Plains by Friday. Finally, Major-to-record river flooding continues across the Carolinas.
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Last Update: 322 PM EDT Thu Sep 20 2018

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Norton, MA Local Forecast Office

20NM W Hyannis MA

Marine Zone Forecast

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

Synopsis: ANZ200-210830- 322 PM EDT Thu Sep 20 2018 .Synopsis for Massachusetts and Rhode Island coastal waters... High pres over the Canadian maritimes builds south over the waters tonight, then moves east Fri. A cold front will sweep across the waters early Sat with pre-frontal S-SW winds approaching gale force Fri night. High pres will build east from the Great Lakes this weekend and be followed by a reinforcing high pres area from Ontario on 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. $$

Tonight
E winds 5 to 10 kt. Seas 1 foot or less.
Fri
SE winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft.
Fri Night
SW winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. 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 with gusts up to 20 kt in the afternoon. Seas 2 to 4 ft. A chance of showers.
Sat Night
NE winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas around 2 ft.
Sun
NE winds 5 to 10 kt. Seas 1 foot or less.
Sun Night
NE winds 5 to 10 kt, increasing to 10 to 15 kt after midnight. Seas around 2 ft.
Mon
NE winds 15 to 20 kt. Seas around 2 ft.
Mon Night
E winds 15 to 20 kt. Seas around 2 ft.
Tue
E winds 15 to 20 kt. Seas around 2 ft. A chance of showers.
Tue Night
S winds 15 to 20 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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Last Update: 322 PM EDT Thu Sep 20 2018
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