/Issued 6:24 PM CDT, Tuesday, September 12, 2017/
18z NAM model
Check out this precipitation type forecast valid for Friday afternoon per 12z NAM — The blue areas on the map is snow, yes snow (Possibly heavy) is expected later this week in the mountains in Wyoming, certainly nothing unusual about that but still cool to see. No snow in Minnesota or Wisconsin as will be on the warmer side of this low through Saturday.
A day that featured virtually no clouds anywhere in our area today, can’t remember the last time that has happened? Certainly been a while! Warm temperatures today with highs topping out in the upper 70s to middle 80s (10 to 20 degrees above average for September 12)
One notable change for Wednesday will be higher dew points compared to what we saw in most of our area today. An area of 60-65 degree dew points over western and central Minnesota this afternoon will push into the Northland on Wednesday making it feel a little on the muggy side! Will have continued clear to mostly clear skies for tonight with lows in the 50s to lower 60s with 40s possible in the typical cold spots, but probably no 30s tonight like what occurred this morning.
More warm temperatures Wednesday afternoon with highs in the upper 70s to middle 80s.
Looks like will stay dry in northeast Minnesota and northwest Wisconsin tonight and Wednesday but a cold front approaching from the northwest will stall out over north central Minnesota with increasing instability and moisture taking place near this boundary so we could see a few showers and thunderstorms develop especially by Wednesday night over northern Minnesota.
Chances for showers and thunderstorms will increase in our area for Thursday, Friday and Saturday as a frontal boundary remains over the upper Midwest through Saturday. Warm, moist and unstable air will be found near this boundary, and this coupled with low pressure disturbances lifting northeast into the upper Midwest will lead to occasional showers and thunderstorms later this week. Locally heavy rainfall is possible, and a few strong to severe thunderstorms are also possible Thursday, Friday and Saturday in northeast Minnesota and northwest Wisconsin.
Note: High temperature of 84 degrees at International Falls, Minnesota today, September 12, 2017 is good for 2nd warmest high temperature on record on September 12 — See top 5 list below.
1: 87 degrees set in 1952
2: 84 degrees set in 2017
3: 83 degrees set in 1981
4: 82 degrees set in 1995 and 1909
5: 81 degrees set in 1976
Forecast for Duluth and Superior
.Tonight… Mainly clear. Low 55 to 60. Wind south around 10 mph.
.Wednesday… Partly cloudy. Turning more humid. High 78 to 83. Wind south at 10 to 15 mph. Afternoon dew point around 65 degrees.
.Thursday… Mostly cloudy. Showers and thunderstorms possible. High 75 to 80. Wind variable in direction 7 to 13 mph.
Normal temperatures for Wednesday
Sunrise Wednesday: 6:44 AM CDT
Sunset Wednesday: 7:24 PM CDT