/Issued 5:45 PM CST, Wednesday, December 6, 2017/
12z NAM 500mb Vorticity forecast valid for Friday evening
Weather pattern won’t be changing very much through next week. A huge ridge will remain in place over northwest Canada/western portions of the U.S. with a deep trough near/east of the Rockies with colder temperatures.
Water vapor satellite loop from today, December 6, 2017. Still dealing with the effects of a powerful low today as it continues to lift slowly toward the NE out of Hudson Bay Canada. Gusty winds and snow flurries lingered in the Northland today on the backside of that area of low pressure well to our northeast.
18z NAM Nest 3km model from 12.6.2017 – Simulated radar from late Friday afternoon (4 PM) through Midnight Friday night. Parts of the Northland could get a burst of snow mainly Friday evening the way it looks now, likely won’t be very much snow with accumulations of around an inch or so possible for some of us.
For Southern California, Los Angeles area
12z NAM-WRF 3km model from 12.6.2017 valid for Friday afternoon. Yes that is snow over parts of the deep south on Friday. Snow is possible in parts of Louisiana and Mississippi on Friday, possibly as far east as Alabama and Georgia.
Gravity wave is still going strong early this evening as snow showers continue to affect parts of northwest Wisconsin with some heavier snow showers along the South Shore. The ingredients in place supporting this gravity wave should begin to break down later tonight and snow showers should start to diminish later in the night, but until that happens, snowfall of around 1 or 2 inches is possible in parts of Douglas and Bayfield County. The rest of northeast Minnesota will continue to see light snow showers and flurries mainly this evening with a dusting to half inch of accumulation possible. It will be chilly tonight with lows ranging from the single digits below zero to around 10 above.
Some partial clearing at times through Thursday otherwise mostly cloudy skies are expected. Highs Thursday will be in the teens to around 20 degrees.
Forecast for Duluth and Superior
.Tonight… Breezy. Flurries and snow showers mainly this evening. Mostly cloudy with some breaks in the clouds. Low 2 to 7. Wind northwest at 15 to 25 mph with higher gusts possible.
.Thursday… Partly to mostly cloudy. Flurries possible. High 15 to 20. Wind west at 10 to 20 mph.
.Friday… Mostly cloudy. Snow showers or flurries possible. High around 20. Wind northwest at 10 to 20 mph.
Normal temperatures for Thursday
Sunrise Thursday: 7:40 AM CST
Sunset Thursday: 4:20 PM CST