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Some more snow on the way; Winter Storm Watch in effect along the North Shore for Friday-Friday night

Snowfall Reports from around the Northland for December 12, 2019. Source: https://www.weather.gov/dlh/

Grand View, WI: 6.3″
3 SSW Bruno, MN: 5.5″
1 ESE Duluth, MN: 5.4″
3 NW Duluth, MN: 5.3″
Kettle River, MN: 4.8″
Duluth Airport: 4.1″
Gile, WI: 4.0″
Nisswa, MN: 4.0″
Moose Lake, MN: 3.9″
5 NW Two Harbors, MN: 3.4″
7 ESE Superior, WI: 3.4″
Brule, WI: 3.0″
Trego, WI: 3.0″
2 E Hertel, WI: 2.8″
4 SSE Webster, WI: 2.5″
7 WSW Pine River, MN: 2.0″
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*Record Snowfall at Duluth, Minnesota today*

New Record: 4.1″ set on December 12, 2019; Old Record 2.7″ set on December 12, 1968.

Note: With the 4.1″ of snow in Duluth today, this brings the December total to 18.0″, this is more snow in only the first 12 days of the month than what we typically get during the entire month of December (17.7″)

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Winter Storm Watch (blue area on map) in effect from 6 AM Friday through late Friday night including the cities of Two Harbors, Silver Bay, Isabella, Hovland and Grand Marais.

Plan on slippery road conditions. The hazardous conditions could impact the Friday morning and evening commutes. Travel could become very difficult along the North Shore Friday into Friday night.

Source: https://www.weather.gov/dlh/

Road Conditions

Minnesota – https://lb.511mn.org/
Wisconsin – https://511wi.gov/

Radar forecast valid from 6 AM Friday to 6 AM Saturday per 18z NAM-WRF model.

Source: https://weathermodels.com/

Here’s my snowfall forecast through 7 AM Saturday.

Greatest amounts along the North Shore (north of Duluth) potential for 6-10 inches of snow with locally higher amounts.

For Duluth and Superior, around 1 to 2 inches of snow for Friday/Friday night.

Tonight’s lake effect snow: The band of lake effect snow which had developed over the southwest arm of Lake Superior this afternoon is beginning to weaken a bit per radar imagery as of 7 PM. This narrow band of lake effect snow has also been shifting slightly north over the last hour or so, and is now mostly north of Duluth as of 7 PM. There is good convergence occurring this evening along the North Shore with favorable lake effect parameters in place for heavier snow showers to develop tonight. 850mb temps as of 7 PM were right around -14C with a 10 to 16 degree difference in air to water temps which is more than enough for lake effect snow development. I think the best chance for lake effect snow for the rest of tonight will be on the north side of Duluth and especially farther up the North Shore. The south side of Duluth, including Proctor, West Duluth, West End and Downtown areas probably won’t see much more snow tonight.

Lows tonight will be in the single digits and teens but a few locations could fall into the single digits below if skies clear a bit.

Friday’s snow event: Low pressure moves east out of the Northern Plains which will bring another round of snow to most of the Northland. Snow begins in western areas during the morning, spreads farther east Friday afternoon-early Friday evening. Snow is forecast to taper off from NW-SE Friday night, but some snow will likely linger into Saturday near Lake Superior, especially over the Arrowhead and along the South Shore.

Highs on Friday will be in the teens and 20s.

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Outlook for Duluth and Superior

-Rest of tonight: Mostly cloudy. Some light snow showers or flurries possible. Snowfall accumulations less than one inch. East wind 5 to 15 mph. Low 5 to 10.

-Friday: Mostly cloudy. Some snow possible especially during the afternoon and evening. Snowfall accumulations of 1 to 2 inches possible. High 20 to 25. Wind southeast 10 to 15 mph.

Thanks for reading!

Tim

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