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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Gray/Portland, ME Local Forecast Office

20NM ENE Portsmouth NH

Marine Point Forecast

[NOTICE]

This
Afternoon
ENE 10kt
4ft
High: 61 °F
Tonight

Light Wind
3-4ft
Low: 59 °F
Friday

S 20kt
6ft
High: 68 °F
Friday
Night
SW 20kt
5ft
Low: 63 °F
Saturday

WNW 15kt
3-4ft
High: 66 °F
Saturday
Night
Light Wind
2ft
Low: 56 °F
Sunday

Light Wind
1-2ft
High: 63 °F
Sunday
Night
NNE 10kt
1-2ft
Low: 52 °F
Monday

NE 15kt
4ft
High: 58 °F

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 12:32 pm EDT Sep 20, 2018
Forecast Valid: 1pm EDT Sep 20, 2018-6pm EDT Sep 26, 2018

View Nearby Observations

Detailed Forecast

Synopsis: ANZ100-210530- 1126 AM EDT Thu Sep 20 2018 .Synopsis for Stonington ME to Merrimack River MA out to 25 NM... High pressure over the region will slowly retreat into the maritimes through tonight allowing a light east wind to continue. An increasing return south to southwest flow will develop Friday into Friday night in advance of an approaching strong cold front. The front will pass across the waters late Friday night with north to northwest winds behind the front. High pressure builds across the waters over the weekend allowing winds to diminish and become light. && $$

This Afternoon

ENE wind around 10 kt. Mostly cloudy. Seas around 4 ft.

Tonight

Variable winds 5 kt or less. Mostly cloudy. Seas 3 to 4 ft.

Friday

S wind 10 to 15 kt increasing to 15 to 20 kt in the afternoon. Winds could gust as high as 30 kt. Partly sunny. Seas 4 ft building to 6 ft.

Friday Night

SW wind around 20 kt, with gusts as high as 35 kt. Showers likely and possibly a thunderstorm, mainly after 3am. Seas around 5 ft.

Saturday

WNW wind 10 to 15 kt becoming N in the afternoon. Winds could gust as high as 25 kt. A chance of showers before 8am. Seas 3 to 4 ft.

Saturday Night

Variable winds 5 kt or less. Mostly clear. Seas around 2 ft.

Sunday

Variable winds 5 kt or less. Sunny. Seas 1 to 2 ft.

Sunday Night

S wind 5 to 8 kt becoming NNE 7 to 10 kt after midnight. Winds could gust as high as 20 kt. Mostly clear. Seas 1 to 2 ft.

Monday

NE wind 10 to 15 kt, with gusts as high as 25 kt. Mostly sunny. Seas around 4 ft.

Winds and seas higher in and near tstms.

*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.