Severe Thunderstorms With Heavy Rain Possible In The Upper Midwest; Excessive Heat For Central U.S.

Several rounds of strong to severe thunderstorms will be possible from the northern Plains and upper Midwest to the Great Lakes through Friday. Damaging winds, large hail, and flooding will be the primary threats with these storms. Excessive heat will grip the central Plains with heat indices approaching 105 to 110 degrees. Very hot and humid conditions are likely to expand into the Mid Atlantic.
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Last Update: 910 AM EDT Fri Jul 21 2017

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Gray/Portland, ME Local Forecast Office

18NM S Portland ME

Marine Zone Forecast


Synopsis: ANZ100-220315- 910 AM EDT Fri Jul 21 2017 .Synopsis for Stonington ME to Merrimack River MA out to 25 NM... A weak cold front will cross the Gulf of Maine tonight with another front arriving Saturday night. Low pressure is expected to track to the south of Cape Cod on Sunday with another area of low pressure tracking toward the region on Monday. $$

Rest Of Today
W winds around 5 kt, becoming SW with gusts up to 20 kt this afternoon. Seas around 2 ft.
Tonight
SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft.
Sat
SW winds 5 to 10 kt. Seas around 2 ft.
Sat Night
SW winds 5 to 10 kt, becoming NE after midnight. Seas 2 to 3 ft. A chance of showers.
Sun
E winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers.
Sun Night
E winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers.
Mon
NE winds 5 to 10 kt with gusts up to 20 kt. Seas 3 to 4 ft. Showers likely with a chance of tstms. Some tstms may produce heavy rainfall.
Mon Night
NE winds 5 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. A chance of showers.
Tue
NE winds around 10 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers.
Tue Night
NE winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 7 ft. A chance of showers. winds and seas higher in and near tstms.

Winds and seas higher in and near tstms.
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Last Update: 910 AM EDT Fri Jul 21 2017
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