Severe Thunderstorms and Locally Heavy Rainfall Shifts from the Plains to Mid Mississippi Valley on Monday

A strong upper disturbance will depart the central Rockies into the central Plains to form a rather wound-up area of low pressure on Monday. This will shift the chances for severe thunderstorms and locally heavy rainfall from portions of the central and southern Plains into the Mid Mississippi Valley.
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Gray/Portland, ME Local Forecast Office

25NM ENE Portsmouth NH

Marine Point Forecast

[NOTICE]

Overnight

SW 10kt
3ft
Low: 59 °F
Monday

N 20kt
3ft
High: 62 °F
Monday
Night
WNW 10kt
2ft
Low: 56 °F
Tuesday

SSW 15kt
2ft
High: 69 °F
Tuesday
Night
SSW 15kt
3ft
Low: 57 °F
Wednesday

S 15kt
2ft
High: 66 °F
Wednesday
Night
S 20kt
4ft
Low: 61 °F
Thursday

S 20kt
7ft
High: 67 °F
Thursday
Night
SSW 15kt
7-8ft
Low: 62 °F

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 10:30 pm EDT Jun 24, 2018
Forecast Valid: 12am EDT Jun 25, 2018-6pm EDT Jul 1, 2018

View Nearby Observations

Detailed Forecast

Synopsis: ANZ100-251645- 1032 PM EDT Sun Jun 24 2018 .Synopsis for Stonington ME to Merrimack River MA out to 25 NM... Weak low pressure crosses southern New England and deepens as it moves through the Gulf of Maine tonight toward Nova Scotia by morning. A northerly flow will be expected behind this low on Monday, with high pressure building out of Ontario and across southern New England, cresting to the south on Tuesday. Southwest flow on Wednesday becomes southerly on Thursday ahead of the next front that moves through the Gulf of Maine Thursday night from the west. $$

Overnight

SW wind around 10 kt becoming WNW. Showers likely and possibly a thunderstorm. Patchy fog. Seas around 3 ft.

Monday

N wind 15 to 20 kt becoming NNE 10 to 15 kt in the afternoon. A chance of showers before 7am, then a chance of showers after noon. Patchy fog before 10am. Seas around 3 ft.

Monday Night

NE wind 5 to 10 kt becoming WNW after midnight. Partly cloudy. Seas around 2 ft.

Tuesday

W wind 5 to 8 kt becoming SSW 10 to 15 kt in the afternoon. Sunny. Seas around 2 ft.

Tuesday Night

SSW wind 10 to 15 kt becoming WSW after midnight. Winds could gust as high as 20 kt. Mostly clear. Seas around 3 ft.

Wednesday

WSW wind 10 to 15 kt becoming S in the afternoon. Winds could gust as high as 20 kt. Mostly sunny. Seas around 2 ft.

Wednesday Night

S wind around 20 kt, with gusts as high as 25 kt. A chance of showers. Seas around 4 ft.

Thursday

S wind around 20 kt, with gusts as high as 30 kt. Showers. Seas 4 ft building to 7 ft.

Thursday Night

SSW wind 10 to 15 kt, with gusts as high as 25 kt. A chance of showers. Seas 7 to 8 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.