Dangerous heat and humidity from the central U.S. to East Coast this weekend

Hot and very humid conditions will push the heat index to well over 100 degrees across a large portion of the central and eastern U.S. Excessive Heat Warnings and Heat Advisories are in effect for much of the Plains, Miss. Valley, Midwest, Ohio Valley, Mid-Atlantic and southern states. Be very cautious if you must do outdoor activities in these areas during the afternoon and evening this weekend.
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Last Update: 919 AM EDT SUN JUL 24 2016

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Gray/Portland, ME Local Forecast Office

9NM ENE Portland ME

Marine Zone Forecast


Synopsis: A NARROW RIDGE OF HIGH PRESSURE WILL BUILD IN FROM THE WEST TODAY AND WILL SHIFT OFFSHORE TONIGHT. A COLD FRONT WILL APPROACH FROM THE WEST ON MONDAY AND WILL CROSS THE REGION MONDAY NIGHT. HIGH PRESSURE WILL BUILD IN FROM THE WEST TUESDAY THROUGH WEDNESDAY. A WEAK FRONTAL BOUNDARY WILL SETTLE SOUTH FROM CANADA WEDNESDAY NIGHT AND WILL STALL OVER THE REGION ON THURSDAY. HIGH PRESSURE BUILDING IN FROM THE NORTH WILL SUPPRESS THE STALLED FRONTAL BOUNDARY SOUTH OF NEW ENGLAND THURSDAY NIGHT. SEVERAL WEAK WAVES OF LOW PRESSURE WILL TRACK EAST ALONG THE STALLED FRONTAL BOUNDARY FRIDAY AND SATURDAY.

Rest Of Today
NW winds 5 to 10 kt...becoming SW this afternoon. Seas 1 foot or less...then 1 to 2 ft this afternoon.
Tonight
SW winds 5 to 10 kt...diminishing to around 5 kt after midnight. Seas 1 foot or less.
Mon
SW winds around 5 kt...becoming SE in the afternoon. Seas 1 foot or less. A chance of showers and tstms in the afternoon.
Mon Night
S winds 5 to 10 kt...becoming SW after midnight. Seas 2 to 3 ft. A chance of tstms in the evening. A chance of showers.
Tue
W winds around 5 kt. Seas 1 to 2 ft in the morning...then 1 foot or less.
Tue Night
NW winds around 5 kt. Seas 1 foot or less.
Wed
SW winds around 5 kt. Seas 1 foot or less.
Wed Night
S winds around 5 kt. Seas 1 foot or less.
Thu
S winds up to 10 kt. Seas 1 foot or less.
Thu Night
S winds up to 10 kt. Seas 1 to 2 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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ABOUT THIS FORECAST

Last Update: 919 AM EDT SUN JUL 24 2016
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