/Issued 5:13 PM CDT, Tuesday, August 22, 2017/
Water vapor satellite image and surface analysis from 5:15 PM CDT, August 22, 2017.
Radar loop ending at 5:30 PM CDT, August 22, 2017. Scattered showers continue to move south/east across parts of the Northland late this afternoon — These showers will come to an end later this evening.
18z NAM 500mb Vertical Velocity forecast for late Wednesday afternoon (4PM)
Red outlined area on map has the greatest chance for some showers later Wednesday afternoon or night as these showers moving south/east.
Note: 5th wettest August 21st on record at Duluth, Minnesota on Monday with a rainfall total of 1.04 inches — See top 5 list below.
1: 1.91 inches set in 1916
2: 1.13 inches set in 1874
3: 1.11 inches set in 1964
4: 1.09 inches set in 1882
5: 1.04 inches set in 2017
Rainfall reports from August 21, 2017
Source: http://www.weather.gov/dlh/; http://mesowest.utah.edu
Duluth, MN: 1.04″
Saginaw, MN: 0.75″
Celina, MN 2 E: 0.70″
Grand Rapids, MN 12 N: 0.68″
Island Lake, MN 4 E: 0.67″
Superior, WI: 0.52″
Kabetogama, MN: 0.42″
Ashland, WI: 0.34″
Brainerd, MN: 0.26″
Wright, MN 3 E: 0.26″
Gordon, WI: 0.23″
Grand Marais, MN: 0.18″
Hibbing, MN: 0.18″
Wolfridge, MN (ELC) 0.18″
Park Falls, WI: 0.18″
Butternut, WI: 0.14″
International Falls, MN: 0.09″
Orr, MN 3 E: 0.07″
Clam Lake, WI 4 W: 0.06″
Cook, MN: 0.04″
Embarrass, MN: 0.02″
Northwest flow aloft covered the upper Midwest today between an upper level low to our east and high pressure to our southwest. Colder temperatures aloft combined with some heating near the surface made the atmosphere unstable enough to generate a few afternoon showers in parts of the Northland. Skies today were partly to mostly cloudy with highs in the 60s to around 70 degrees.
Spotty rain showers will persist into the evening hours then the overnight will be dry and cool under clear to partly cloudy skies with a potential for some patchy fog. Lows tonight in the 40s to lower 50s but 30s are certainly possible in the typical cold spots around the area.
Partly to mostly cloudy skies on Wednesday with a chance for rain showers mainly later on in the day and into Wednesday night. Note: At the moment it looks like the greatest chances for these showers to occur will be across western-southern areas of the Northland with most of the North Shore to Ely and Grand Marais staying dry. Highs Wednesday mainly in the 60s.
Dry Thursday with highs in the 60s to lower 70s.
Rain chances return to the Northland beginning Friday afternoon or evening and will continue through the weekend thanks to a slow moving low pressure system which moves east out of the northern Plains. Cool temperatures will also continue especially the daytime highs which will average 10-15 degrees below normal thanks to the clouds and rain.
Forecast for Duluth and Superior
.Tonight… Isolated showers this evening. Partly to mostly cloudy. Low 48 to 53. Wind northwest at 10 to 20 mph.
.Wednesday… Partly to mostly cloudy. High 63 to 68. Wind northwest at 10 to 20 mph.
.Wednesday night… A few showers possible otherwise mostly cloudy. Low around 50.
.Thursday… Mostly sunny. High 64 to 69. Wind east at 5 to 15 mph.
Normal temperatures for Wednesday
Sunrise Wednesday: 6:17 AM CDT
Sunset Wednesday: 8:04 PM CDT