/Issued 6:14 PM CDT, Friday, October 13, 2017/
Note: Largest waves and strongest winds with this event will remain over central/eastern portions of Lake Superior, all of Lake Michigan and western portions of Lake Huron.
Forecast surface map valid at 7 AM Sunday
12z European model from October 13, 2017.
Note: 4th warmest low temperature on record at International Falls, Minnesota for October 12. Low temperature on Thursday was 49 degrees. The record warm low temperature for October 12 is 57 degrees set in 1984.
A nice fall day around here with clouds earlier in the day giving way to a lot of sunshine this afternoon. High temps were in the 50s with a few southern locations in northwest Wisconsin and also near Lake Superior close to 60 degrees.
Clear to partly cloudy skies on the way for tonight as high pressure moves east through the upper Midwest. Low temperatures will be in the 20s and 30s.
Increasing cloudiness for Saturday with high temperatures in the 40s and 50s. Low pressure will be over the western High Plains Saturday morning, this system will track toward the ENE moving into eastern Iowa Saturday evening, then moving into northern lower Michigan by Sunday morning. Light rain is possible over most of the Northland during the Saturday afternoon-early Sunday morning time frame as this area of low pressure swings through. Note: Temperatures aloft do become cold enough for frozen precipitation in far northern Minnesota early Sunday morning but surface temperatures have trended warmer compared to how it looked 24 hours ago, so the potential for the rain to change over to snow with some snow accumulation looks less likely this evening than it did on Thursday. There still could be a rain/snow mix that develops in parts of far northern Minnesota late Saturday night but little to no snow accumulation is expected the way it looks now.
Low pressure will deepen quite a bit once it reaches the eastern Great Lakes/eastern Canada vicinity this weekend with the central pressure ~1003mb Saturday evening dropping to ~990mb by Sunday afternoon — Most of this deepening takes place after this storm exits the Northland.
As this system moves into Quebec Province Sunday it will be followed by an upper level disturbance which drops southeast into the Northland for Sunday afternoon/night — A few spotty showers, perhaps mixed with snow flurries are possible as that feature moves through. Highs on Sunday are forecast to range from around 40 to 50 degrees.
Next week looks pretty nice as a near zonal flow sets up, possibly shifting toward a southwest flow later next week. There will be a couple frontal passages next week but no rain or snow is expected as those fronts move through. A better chance for some rain could come next weekend (21st-22nd)
Forecast for Duluth and Superior
.Tonight… Mostly clear. Low 30 to 35. Wind west to northwest at 10 to 15 mph this evening becoming light and variable.
.Saturday… Increasing cloudiness. Breezy. High 49 to 54. Wind east at 10 to 20 mph with gusts to 30 mph during the afternoon.
.Saturday night… Light rain. Mostly cloudy. Low around 40. Wind northeast at 10 to 20 mph shifting to north to northwest after midnight.
Normal temperatures for Saturday
Sunrise Saturday: 7:26 AM CDT
Sunset Saturday: 6:23 PM CDT