/Issued 8:08 PM CDT, Monday, August 7, 2017/
12z NSSL WRF-ARW model valid at 6 PM Tuesday
18z HRRRX model valid at 6 PM Tuesday
Note: A top 5 coldest low temperature on record this morning, August 7, 2017 at Duluth and International Falls, Minnesota -- See lists below.
1: 38 degrees set in 1972
2: 39 degrees set in 1989
3: 47 degrees set in 1965
4: 48 degrees set in 2017, 1976, 1952, 1921, 1913 and 1904
5: 49 degrees set in 1993 and 1922
International Falls, Minnesota
1: 40 degrees set in 2013 and 1926
2: 42 degrees set in 1972
3: 43 degrees set in 2017
4: 44 degrees set in 2016, 2012, 2010, 1989 and 1952
5: 45 degrees set in 2009, 2008, 1922, 1921, 1907, 1906 and 1898
Northwest flow aloft continued today while high pressure covered the northern Plains and portions of the upper Midwest. Sunny to partly cloudy skies were found across the Northland today with a few showers affecting extreme northeastern Minnesota but more so just north of the border in southern Ontario Province. Highs today were generally in the mid 70s to low 80s which is near to slightly warmer than average for early August.
Temperatures early Tuesday morning shouldn't be as chilly as what has occurred the past few nights. Lows tonight bottoming out in the 50s, but 40s will probably occur in a few locations, but I don't think will have any 30s in our area tomorrow morning unlike the past few mornings. Clear to partly cloudy skies are expected tonight.
A cold front sitting north of Minnesota this afternoon will drop slowly south through Thursday, this boundary is forecast to move into northern Minnesota Tuesday, and will remain in this general area into Wednesday before it gets shoved a little further to the south on Thursday -- Moisture, some instability and lift near this cold frontal boundary should lead to some showers or thunderstorms in northeast Minnesota and northwest Wisconsin from Tuesday through Thursday, although most of the showers Tuesday look like they will remain over northern Minnesota with better chances for showers farther south for Wednesday and Thursday.
Note: Severe weather is not expected Tuesday through Thursday but a few storms could become strong enough to produce small hail or gusty winds. Heavy downpours and lightning will also occur in and near any thunderstorm.
High temperatures Tuesday will range from the lower 70s in far northern Minnesota to the upper 70s and lower 80s in east central Minnesota and northwest Wisconsin. Highs Wednesday mainly in the 70s. Cooler Thursday with highs in the 60s to around 70 degrees.
Note: Still looks like will see an upper level low pressure system setup somewhere from the upper Midwest to eastern Great Lakes Friday through Sunday. Computer models today have trended a little farther east with where this upper low develops, and this could result in somewhat lower chances for rain showers in the Northland over the weekend compared to how it looked the past few days. The European model is the driest while the GFS and Canadian models do show some showers affecting parts of the area Friday through Sunday. Stay tuned.
Forecast for Duluth and Superior
.Tonight... Clear to partly cloudy. Low 55 to 60. Wind west to southwest at 10 to 15 mph.
.Tuesday... Partly cloudy. High 78 to 83. Wind southwest at 10 to 20 mph.
.Wednesday... Mostly cloudy. Scattered showers or thunderstorms possible. High 70 to 75.
Normal temperatures for Tuesday
Sunrise Tuesday: 5:58 AM CDT
Sunset Tuesday: 8:30 PM CDT