Dangerous Heat Building in the West; Severe Storms in the Upper Midwest

A long duration heat wave will build across the Southwest, California, and Pacific Northwest. Dangerous heat is also forecast for the Great Basin and South Plains. Severe storms in the Upper Midwest may have locally heavy rain, damaging winds, and very large hail. Heavy rain and flooding will also be possible in the Deep South and Appalachians.
Read More...

En Español

For More Weather Information:

Gray/Portland, ME Local Forecast Office

8NM ENE Portland ME

Marine Point Forecast

[NOTICE]

Overnight

NNW 10km/h
< 1m
Low: 19 °C
Friday

ESE 15km/h
< 1m
High: 24 °C
Friday
Night
NNE 15km/h
< 1m
Low: 18 °C
Saturday

E 25km/h
< 1m
High: 21 °C
Saturday
Night
NE 15km/h
< 1m
Low: 17 °C
Sunday

E 20km/h
< 1m
High: 20 °C
Sunday
Night
E 15km/h
< 1m
Low: 17 °C
Monday

ESE 15km/h
< 1m
High: 21 °C
Monday
Night
SE 10km/h
< 1m
Low: 17 °C

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 12:04 am EDT Aug 14, 2020
Forecast Valid: 2am EDT Aug 14, 2020-6pm EDT Aug 20, 2020

View Nearby Observations

Detailed Forecast

Synopsis: ANZ100-141615- 1006 PM EDT Thu Aug 13 2020 .Synopsis for Stonington ME to Merrimack River MA out to 25 NM... High pressure builds out of northern Canada and into the Maritimes through the weekend. Increasing northeast winds as the high builds in may bring a window of gusts and building seas before a return to calmer weather. A slow moving frontal system will approach the waters by early next week. && $$

Overnight

NNW wind around 10 km/h. Partly cloudy. Seas 1 m or less.

Friday

N wind 10 to 15 km/h becoming ESE in the afternoon. Mostly sunny. Seas 1 m or less.

Friday Night

ENE wind 10 to 13 km/h becoming NNE 12 to 15 km/h after midnight. Partly cloudy. Seas 1 m or less.

Saturday

E wind 20 to 25 km/h, with gusts as high as 35 km/h. Partly sunny. Seas 1 m or less.

Saturday Night

NE wind around 15 km/h. Partly cloudy. Seas 1 m or less.

Sunday

E wind 15 to 20 km/h. Mostly cloudy. Seas 1 m or less.

Sunday Night

E wind around 15 km/h. A chance of showers after 2am. Seas 1 m or less.

Monday

ESE wind around 15 km/h. A chance of showers. Seas 1 m or less.

Monday Night

SE wind 7 to 10 km/h becoming NW 5 to 8 km/h after midnight. A chance of showers. Seas 1 m or less.

*Notices:

This forecast is for a single location. For safety concerns, mariners should be aware of the weather over a larger area. Forecast information for a larger area can be found within the zone forecast and the NDFD graphics.
The forecast conditions at a particular point may not exceed the criteria of a Small Craft Advisory, Gale, Storm etc. These watches/warnings/advisories are issued for the entire zone in which the point resides and mariners should act accordingly.