Heavy Rain and Flooding Threat in the Ohio Valley

Gulf moisture will combine with a cold front and will bring heavy rain and scattered flash flooding over parts of the Mid-South into the Ohio Valley through the morning and the Ohio Valley and Central Appalachians on Tuesday. Showers and thunderstorms, some severe, are expected over the Southern Rockies/Southern High Plains on Tuesday. Read More >

Hazardous Weather Conditions

For More Weather Information:

Duluth, MN Local Forecast Office

10NM SW Grand Portage MN

Marine Point Forecast

[NOTICE]

Tonight
Low: 48 °F
W 10kt
1-2ft

Small Craft Advisory
Tuesday
High: 52 °F
NW 15kt
< 1ft

Small Craft Advisory
Tuesday Night
Low: 41 °F
Light Wind
< 1ft
Wednesday
High: 55 °F
Light Wind
< 1ft
Wednesday Night
Low: 48 °F
S 10kt
< 1ft
Thursday
High: 60 °F
SSW 15kt
2-3ft
Thursday Night
Low: 53 °F
SSW 15kt
2ft
Friday
High: 61 °F
WSW 10kt
< 1ft
Friday Night
Low: 50 °F
Light Wind
< 1ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 7:25 pm CDT Oct 6, 2025
Forecast Valid: 8pm CDT Oct 6, 2025-6pm CDT Oct 13, 2025

View Nearby Observations

Detailed Forecast

Tonight

W wind around 10 kt, with gusts as high as 20 kt. Mostly clear. Waves 1 to 2 ft.

Tuesday

NW wind 10 to 15 kt, with gusts as high as 25 kt. Sunny. Waves 1 ft or less.

Tuesday Night

Variable winds 5 kt or less. Clear. Waves 1 ft or less.

Wednesday

Variable winds 5 kt or less. Sunny. Waves 1 ft or less.

Wednesday Night

S wind 5 to 10 kt, with gusts as high as 20 kt. Mostly clear. Waves 1 ft or less.

Thursday

SSW wind around 15 kt, with gusts as high as 25 kt. Sunny. Waves 2 to 3 ft.

Thursday Night

SSW wind 10 to 15 kt, with gusts as high as 25 kt. A chance of showers, mainly before 1am. Waves around 2 ft.

Friday

WSW wind 5 to 10 kt becoming WNW in the afternoon. Winds could gust as high as 15 kt. Mostly sunny. Waves 1 ft or less.

Friday Night

Variable winds 5 kt or less. Partly cloudy. Waves 1 ft 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.