National Weather Service United States Department of Commerce

A stalled frontal boundary and ample monsoonal moisture will lead to flash flood potential from the Great Basin to the Great Plains tonight and Tuesday

A stalled frontal boundary will set up along the southern and central Rockies for the next couple of days providing focus for showers and thunderstorms. In addition, ample monsoonal moisture will stream in across the southwest bringing enough moisture to introduce a flash flood threat from the Great Basin and Southwest eastward across the central and southern Rockies into the adjacent Plains.
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Hazardous Weather Conditions

Current Conditions

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Grand Portage MN

7 Day Forecast

For More Weather Information:

Duluth, MN Local Forecast Office

Overnight

Thunderstorms Likely Chance for Measurable Precipitation 60%

Thunderstorms
Likely

Low: 53 °F

Tuesday

Scattered Showers Chance for Measurable Precipitation 50%

Scattered
Showers

High: 66 °F

Tuesday
Night

Decreasing Clouds

Decreasing
Clouds

Low: 48 °F

Wednesday

Mostly Sunny

Mostly
Sunny

High: 65 °F

Wednesday
Night

Partly Cloudy

Partly
Cloudy

Low: 50 °F

Thursday

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

High: 66 °F

Thursday
Night

Slight Chance Thunderstorms

Slight Chc
Thunderstorms

Low: 51 °F

Friday

Slight Chance Thunderstorms

Slight Chc
Thunderstorms

High: 66 °F

Friday
Night

Partly Cloudy

Partly
Cloudy

Low: 51 °F

Detailed Forecast

  • Overnight Showers and thunderstorms likely, mainly before 1am. Mostly cloudy, with a low around 53. Northwest wind around 5 mph. Chance of precipitation is 60%.
  • Tuesday Scattered showers and thunderstorms. Mostly cloudy, with a high near 66. Northwest wind around 5 mph. Chance of precipitation is 50%.
  • Tuesday Night Mostly cloudy, then gradually becoming mostly clear, with a low around 48. Northwest wind around 5 mph becoming calm in the evening.
  • Wednesday Mostly sunny, with a high near 65. North wind around 5 mph becoming south in the afternoon.
  • Wednesday Night Partly cloudy, with a low around 50. Southwest wind around 5 mph becoming calm in the evening.
  • Thursday A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 66.
  • Thursday Night A slight chance of showers and thunderstorms. Partly cloudy, with a low around 51.
  • Friday A slight chance of showers and thunderstorms. Mostly sunny, with a high near 66.
  • Friday Night Partly cloudy, with a low around 51.
  • Saturday Mostly sunny, with a high near 67.
  • Saturday Night A chance of showers and thunderstorms. Partly cloudy, with a low around 54.
  • Sunday A chance of showers and thunderstorms. Partly sunny, with a high near 67.
  • Sunday Night Partly cloudy, with a low around 52.
  • Monday Mostly sunny, with a high near 64.