/Issued 5:18 PM CDT, Wednesday, August 2, 2017/
North Dakota radar loop ending at 4:25 PM today. This rain will move slowly into the Northland later tonight.
Visible satellite loop ending at 4:15 PM today. A potent system for early August, you can see a bit of a spin in the clouds moving southeast out of southern Saskatchewan and into eastern Montana and North Dakota this afternoon — This system moves over the upper Midwest Thursday and should deepen a little more.
Cooler temperatures today under partly to mostly sunny skies. Highs ranged from the 60s near Lake Superior to the lower 70s elsewhere.
Clouds will increase over the Northland tonight with rain moving into western areas later this evening, then spreading farther east by daybreak. Lows in the 50s with east winds gusting to 20 mph near Lake Superior.
Thursday looks like a washout for most of the area with widespread rain over all but far northern Minnesota where little to no rain is expected. Heaviest rain should remain over east central Minnesota into northwest Wisconsin with rainfall amounts of possibly one to two inches by Thursday evening. Highs Thursday only in the 50s with 60s in far northern Minnesota where less rain will fall. Gusty northeast wind near Lake Superior Thursday with gusts to 30 mph possible.
Low pressure developing in the South Dakota-Nebraska area this evening will track east/northeast moving across northern Iowa or southern Minnesota Thursday, then to northern Lake Michigan by Friday morning. As the low moves across the area it will be in the process of deepening while also pulling in a colder air. Underneath the rain on the west/north side of the surface low, 850mb temperatures are forecast to fall to between +2 and +6C on Thursday (Very chilly for early August)
Rain should slowly taper off from NW-SE Thursday night as low pressure starts to exit the upper Midwest.
Note: Friday and through the weekend — Temperatures moderate into the upper 60s to middle 70s, closer to average but still a little below average for the time of year. Unfortunately with the colder temperatures aloft, NW flow and some warming near the surface, will likely see some pop up showers or thunderstorms Friday afternoon, Saturday afternoon and Sunday afternoon. All day rains are not expected with this type of setup, but if you do get underneath a shower, it could rain quite hard for a brief period of time.
Note: A top 5 coldest high temperature is possible at Duluth, Minnesota on Thursday, August 3, 2017. See list below. Records date back to 1870.
1: 54 degrees set in 1974
2: 55 degrees set in 1952
3: 56 degrees set in 1903
4: 58 degrees set in 1915
5: 59 degrees set in 1956
Forecast for Duluth and Superior
.Tonight… Breezy. Increasing cloudiness. Rain developing after 2 AM. Low 55 to 60. Wind east at 10 to 20 mph with gusts to 25 mph.
.Thursday… Rain. Breezy. Areas of fog possible. High 55 to 60. Wind east to northeast at 15 to 25 mph with gusts to 30 mph.
.Thursday night… Rain in the evening, tapering off overnight. Mostly cloudy. Lows in the 50s.
.Friday… Milder. Partly to mostly cloudy. Spotty afternoon-evening showers possible. High 70 to 75. Wind northwest at 10 to 20 mph.
Normal temperatures for Thursday
Sunrise Thursday: 5:51 AM CDT
Sunset Thursday: 8:37 PM CDT