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: 1010 AM EDT Thu Sep 20 2018

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Norton, MA Local Forecast Office

15NM S Gloucester MA

Marine Zone Forecast

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING...

Synopsis: ANZ200-210315- 1010 AM 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. 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. $$

This Afternoon
NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Isolated showers.
Tonight
E winds 5 to 10 kt. Seas 3 to 5 ft.
Fri
S winds 5 to 10 kt, increasing to 15 to 20 kt with gusts up to 25 kt in the afternoon. Seas 4 to 6 ft.
Fri Night
SW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. A chance of showers.
Sat
W winds 10 to 15 kt, becoming N 5 to 10 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 4 ft.
Sat Night
NE winds 5 to 10 kt. Seas around 2 ft.
Sun
NE winds 5 to 10 kt. Seas 1 foot or less.
Sun Night
NE winds 5 to 10 kt. Seas 2 to 3 ft.
Mon
NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft.
Mon Night
E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. 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: 1010 AM EDT Thu Sep 20 2018
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