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

7NM E Boston 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. Waves 1 foot or less, except 2 to 4 ft at the outer harbor entrance. Patchy fog after midnight with vsby 1 to 3 nm.
Fri
S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Waves around 2 ft.
Fri Night
SW winds 10 to 15 kt with gusts up to 30 kt. Waves around 2 ft. A chance of showers. Vsby 1 to 3 nm.
Sat
NW winds 10 to 15 kt. Gusts up to 25 kt in the morning. Waves around 2 ft. A chance of showers.
Sat Night
N winds 5 to 10 kt. Waves 1 foot or less.
Sun
N winds around 5 kt. Waves 1 foot or less.
Sun Night
NE winds 5 to 10 kt. Waves around 2 ft.
Mon
NE winds around 10 kt with gusts up to 20 kt. Waves 2 to 3 ft.
Mon Night
E winds 5 to 10 kt. Waves 1 foot or less, except 2 to 4 ft at the outer harbor entrance.
Tue
SE winds around 10 kt. Waves 1 foot or less. A chance of showers.
Tue Night
S winds 10 to 15 kt. Waves 1 foot or less. 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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