/Issued 5:33 PM CDT, Tuesday, October 23, 2018/
Goes-16 mid level water vapor satellite imagery; Surface analysis from late Tuesday afternoon. A more active weather pattern developing across parts of the U.S through the weekend.
Goes-16 water vapor satellite loop from Tuesday, October 23, 2018.
Loop time: 1:02 PM to 5:47 PM CDT
18z NAM 3km model 10-23-2018
Simulated radar forecast valid from 1 PM Wednesday to 1 AM Friday
Light rain spreads from SW-NE across the Northland Wednesday night-Thursday morning with some light rain expected to continue through the day Thursday.
Widespread below average temperatures have dominated the month of October across the northern Plains, upper Midwest and western Great Lakes with just a few brief warm-ups on occasion — Check out these temperature departures for the month (Thru the 22nd) Impressive!
12z European Ensemble model (EPS)
Still is a ways out but right now Halloween is looking rather cool! Average high in Duluth on October 31 is 44 degrees; Potential for afternoon-early evening temperatures to be in the mid 30s to around 40 degrees on Halloween.
Not too bad today, but sunshine always makes things better even if the temperatures are on the cool side! The upper Midwest remains in a NW flow aloft per RAP model analysis with a chilly airmass in place consisting of -2 to -6C 850mb temps. Highs today were generally in the low to mid 40s which is slightly below average for October 23. A mix of sun and clouds over the area today but with less clouds and more sun as the afternoon progressed.
Forecast for northeast Minnesota and northwest Wisconsin
[Tonight and Wednesday]
High pressure will be over the upper Midwest tonight, moving east over the central Great Lakes on Wednesday. Mostly clear skies tonight with lows in the 20s to lower 30s but some teens are likely in the typical cold spots around the area. Partly to mostly sunny for Wednesday with highs in the mid 40s to low 50s as winds turn to the south while some warm air advection moves in with 850mb temperatures rising to between +4 and +8C.
Note: Winds will shift to the east later tonight which could cause a few light lake effect rain or snow showers to develop Wednesday morning mainly along the North Shore of Lake Superior but this shouldn’t amount to much.
The end of the week through the weekend still looks rather gloomy thanks to a slow moving low pressure system along with multiple disturbances which are forecast to drop through the upper Midwest — Mainly overcast sky conditions are expected Thursday through Sunday with occasional rain and drizzle.
Duluth, Minnesota Climate Normals for October 24
Sunrise Wednesday: 7:39 AM CDT
Sunset Wednesday: 6:06 PM CDT