Monday, March 13, 2017

A snowfall gradient of ~11 inches in 6 miles over the southern portion of Duluth, Minnesota with the lake effect snow early Monday morning; A recap of the early morning lake effect snow in this post and a look back at a similar lake effect event that hit west Duluth on December 4, 2007

/Issued 5:28 PM CDT, Monday, March 13, 2017/

Snowfall amounts from this lake effect event varied from ~2 inches in west Duluth (Near Denfeld high school) to 13 inches in the Gary New Duluth area.  Note:  The difference between the two locations is roughly 6 miles or just 12 minutes!

Note:  A similar setup occurred back on December 4, 2007 where over a foot of lake effect snow fell over portions of west Duluth, here's a link to a radar loop from 12/4/2007 via the Duluth NWS

Radar image from ~4 AM Monday morning, March 13, 2017.  An impressive but very narrow band of heavy lake effect snow formed at the head of Lake Superior early this morning -- Snowfall rates of 1 to 2 inches an hour occurred underneath this band.  This band of snow was only around 5 miles wide affecting areas from Park Point and Superior southwest through west Duluth, Fond Du Lac, to near Esko according to the National Weather Service in Duluth.

Tonight's low temperature forecast.  Source:

Tuesday's high temperature forecast.  Source:

Snowfall reports from earlier this morning, March 13, 2017

Gary New Duluth, MN 1 NNW:  13.0 inches
Gary New Duluth, MN 1 N:  13.0 inches
Fond Du Lac, MN 3 N:  11.0 inches
Gary New Duluth, MN 1 WSW:  9.5 inches
Superior, WI 3 NNW:  9.0 inches
Ekso, MN 2 E:  7.0 inches
Superior, WI 2 ESE:  5.0 inches
Superior, WI 2 WSW:  4.0 inches
Superior, WI 2 W:  2.0 inches
Proctor, MN:  2.0 inches
West Duluth, MN 1 NE:  1.0 inch

Weather Synopsis for northeast Minnesota and northwest Wisconsin

Lots of sun today in northern Minnesota while a mix of sun and clouds were found in northwest Wisconsin and adjacent areas of far eastern Minnesota.  The setup that produced the heavy lake effect snow early this morning has dissipated thanks to a very dry airmass over the lake this afternoon which has essentially shut off the snow.  Still on the chilly today with highs generally in the upper teens to middle 20s.

Strong high pressure will be in control of our weather through Wednesday as it builds south out of Ontario Province.  Clear to partly cloudy skies are expected with cold temperatures tonight with lows in the single digits below to single digits above zero with the typical cold spots in our area possibly dropping into the teens below zero.  Highs Tuesday will mainly be in the 20s with lows Tuesday night ranging from around zero to the teens above.  Highs Wednesday will be in the 20s to lower 30s.

Note:  The wind over Lake Superior will remain out of the N/NE tonight, and N/NW on Tuesday.  There is a lot of cold air moving over the lake so this could generate some lake effect snow showers at times tonight and Tuesday mainly along the South Shore in northwest Wisconsin.  Snowfall amounts of 1 to 3 inches are possible through Tuesday mainly east of the city of Superior.

Note:  The next chance for some snow or mixed precipitation comes late Thursday night into Friday morning as an area of low pressure and cold front moves through the upper Midwest.

Forecast for Duluth and Superior

.Tonight...  Clear to partly cloudy.  Cold.  Low 2 to 7.  Wind northeast at 5 to 15 mph.

.Tuesday...  Mostly sunny.  High 22 to 27.  Wind north at 5 to 15 mph.

Normal temperatures for Tuesday

High:  33
Low:   17

Sunrise Tuesday:  7:23 AM CDT
Sunset Tuesday:   7:13 PM CDT