/Issued 4:34 PM CDT, Tuesday, August 7, 2018/
Goes-16 visible satellite imagery from late Tuesday afternoon
18z NAM 3km model 8.7.2018
18z HRRR model
Simulated Radar Forecast valid from 7 AM Wednesday to 10 PM Wednesday. Spotty showers are possible Wednesday morning over parts of northeast Minnesota and northwest Wisconsin thanks to some warm air advection, this will be followed by a few showers and thunderstorms later in the day as a cold front pushes S-SE into the Northland.
500mb Forecast valid for Friday, August 10, 2018.
Goes-16 visible satellite loop for Tuesday, August 7, 2018 (Loop time: 9:02 AM to 4:27 PM)
Took a while for the fog and low clouds to burn off this morning near Lake Superior, but this did happen by this afternoon, but low clouds/fog linger over western Lake Superior, hugging the North Shore late this afternoon.
Note: It’s been a little chilly at times in International Falls, Minnesota with 2 low temperature records either broken or tied so far this month.
Climate Stats for August 7, 2018
International Falls, Minnesota
Low temperature of 40 degrees — Ties the record low temperature for August 7, this record was first set on August 7, 1926, and tied on August 7, 2013.
4th lowest temperature on record for August 7 with a low Tuesday morning of 42 degrees. The record low for August 7 is 39 degrees which was set just one year ago in 2017.
A mixed bag of weather across the area today. Western areas were the warmest with highs in the upper 70s to low 80s under partly cloudy to mostly sunny skies. There’s been a few showers and thunderstorms across far southern portions of northwest Wisconsin today with even a report of a Landspout Tornado earlier this afternoon near Grantsburg, Wisconsin (Burnett County) per NWS Duluth.
Near Lake Superior, sunshine broke out this afternoon, but before then it was very foggy and quite gloomy with patchy drizzle! Highs near Lake Superior were in the 60s to around 70 degrees today, while 70s were a common theme in northwest Wisconsin.
Clear to partly cloudy skies are expected for tonight with areas of fog and low clouds, the fog could become dense in spots. Lows tonight will be in the 50s to lower 60s.
Warm and humid on Wednesday! A cold front moves southeast through the Northland during the afternoon-evening hours — Ahead of this front southwesterly flow will advect warmer temps into our area with 925mb temperatures of +24 to +27C and 850mb temps to around +20C. Highs on Wednesday should climb into the 80s, but if clouds are a little more persistent, then highs could end up slightly cooler. It will be humid as dew points climb into the 60s, possibly to around 70 degrees in eastern Minnesota and northwest Wisconsin. The atmosphere is forecast to become somewhat unstable during the afternoon with CAPE to around 500-1500 J/kg, this combined with enough lift provided by the approaching cold front should lead to a few spotty showers and thunderstorms in northeast Minnesota and northwest Wisconsin for Wednesday and Wednesday evening. Mid level lapse rates look poor, generally less than 6.0 c/km, but mid level winds look somewhat favorable for storm organization with NW flow around 30-35 knots. Probably won’t get widespread storm coverage on Wednesday, but at least a few isolated strong thunderstorms could develop later in the day in eastern Minnesota and northwest Wisconsin with lightning, hail and gusty winds being the main hazards out of these storms.
Duluth, Minnesota Climate Normals for August 8
Sunrise Wednesday: 5:57 AM CDT
Sunset Wednesday: 8:30 PM CDT