/Issued 7:15 PM CST, Monday, January 29, 2018/
Here’s my updated snowfall accumulation map for the Tuesday-Wednesday snow event, most of the snow will fall Tuesday afternoon-evening.
18z NAM-Nest simulated radar forecast beginning ~7 AM Tuesday, ending Wednesday evening ~9 PM.
Snow (Blue colors)
Mixed Precipitation (Purple/Pink colors)
Note: Looks like there could be some light lake effect snow showers affecting the North Shore of Lake Superior Tuesday morning, while snow spreads into western sections of the Northland before Noon. The snow will then push farther east during the mid to late afternoon hours. Another round or two of snow is then possible Tuesday night, and also Wednesday afternoon.
12z NAM from Monday, January 29, 2018
-Low temperature of -7 degrees at the Duluth Airport this morning (January 29) First subzero temperature since January 16, about 2 weeks ago.
A chilly day with highs in the single digits and teens. Skies were mostly cloudy to partly sunny today. A large area of high pressure stretched from Manitoba Province, south through the central and southern Plains today.
Tonight: Partly to mostly cloudy skies. Very cold with lows in the single digits, teens and 20s below zero. High pressure will move over the upper Midwest tonight before exiting off to the east toward daybreak.
Tuesday: Increasing cloudiness followed by some snow. An area of low pressure is forecast to be over western Saskatchewan Province during the morning, this low will then track toward the east, reaching southern Ontario Province by Wednesday morning. Attached to this low will be a warm front and cold front, and those fronts will move through the Northland tomorrow and tomorrow night. Strong warm air advection along with a 50+ knot SW low level jet will be found ahead of this system on Tuesday, and this combined with some decent lift will lead to some snow across the Northland. Areas of freezing drizzle are also possible later in the afternoon-evening. Highs Tuesday will be in the teens and 20s with near steady temperatures Tuesday night.
Note: Be prepared for reduced visibilities at times with potential for snow covered and slippery roads in parts of the Northland for Tuesday and Tuesday night.
Note: Arctic air is set to invade the Northland beginning Wednesday night, and lingering through the weekend, along with the frigid temperatures will also be bitterly cold wind chills, and wind chill headlines will likely be needed at times beginning Wednesday night and through the weekend.
Forecast for Duluth and Superior
.Tonight… Very cold. Clear to partly cloudy. Low 5 below to 10 below. Wind light and variable around 10 mph or less.
.Tuesday… Increasing cloudiness. Light snow developing during the afternoon. High 19 to 24. Wind southeast at 10 to 20 mph.
.Tuesday night… Light snow at times. Total snowfall accumulations around one inch. Patchy freezing drizzle possible. Overcast. Steady temperature from 19 to 24. Wind south to southwest at 10 to 20 mph.
Normal temperatures for Tuesday
Sunrise Tuesday: 7:36 AM CST
Sunset Tuesday: 5:09 PM CST