Tropical Moisture Brings Slight Risk of Excessive Rainfall to the Southwest; Strong to Locally Severe Storms on the Plains
Heavy rain and flash flooding are possible across portions of the Southwest through Friday, where Flood Watches are in effect. Strong to locally severe thunderstorms are possible today across portions of the Plains. A tropical wave is causing heavy rainfall in Puerto Rico and the Virgin Islands, which may cause urban and small stream flooding and landslides today. Read More >
| NWS Forecast for: Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM (LSZ162) Issued by: National Weather Service Duluth, MN Last Update: 401 AM EDT Thu Sep 18 2025 |  |
Early This Morning: Northeast winds 15 to 25 knots. Waves 1 to 3 feet. Today: Northeast winds 15 to 25 knots increasing to 20 to 30 knots in the afternoon, then becoming east 15 to 25 knots late. A slight chance of showers. Waves building to 3 to 6 feet occasionally to 8 feet. Tonight: East winds 15 to 25 knots. A slight chance of showers and thunderstorms. Waves subsiding to 3 to 5 feet occasionally to 7 feet. Friday: East winds 15 to 25 knots increasing to 20 to 30 knots in the afternoon. A slight chance of thunderstorms through early afternoon. A chance of showers. Waves building to 5 to 8 feet occasionally to 10 feet. Friday Night: East winds 20 to 30 knots diminishing to 10 to 20 knots after midnight. A chance of showers and a slight chance of thunderstorms. Waves subsiding to 2 to 4 feet. Saturday: East winds 10 to 20 knots. Showers likely. Waves subsiding to calm to 2 feet. Saturday Night: Southeast winds 5 to 15 knots veering south after midnight. Showers likely through midnight. A chance of thunderstorms. A chance of showers after midnight. Waves calm to 2 feet. Sunday: South winds 5 to 15 knots backing northeast. A chance of showers. Waves calm to 2 feet. Monday: South winds 5 to 15 knots backing north. Waves calm to 2 feet. | |
| Zone Forecast: Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM (LSZ162) | |
Visit your local NWS office at: https://www.weather.gov/dlh |