Friday, March 10, 2017

Subzero temps once again tonight; Chilly but dry Saturday; Snow Sunday PM-Monday (Lake effect potential in the Twin Ports) Winter Storm Watch issued for parts of western, central and southern Minnesota

/Issued 4:51 PM CST, Friday, March 10, 2017/












Snow is possible in parts of the Northland Sunday afternoon into Monday.  At the moment it still looks like the greatest potential for >4" of snow will be from west central Minnesota into southeast Minnesota, but this area could shift a little more to the north or perhaps shift a bit to the south before Sunday.  Stay tuned.
















Tonight's low temperature forecast.  Source:  https://graphical.weather.gov




















Saturday's high temperature forecast.  Source:  https://graphical.weather.gov




















Snow depth map for Minnesota as of March 9, 2017
Source:  http://www.dnr.state.mn.us




















Low temperature reports from this morning, March 10, 2017
Source:  http://www.weather.gov/dlh/

Lyman Lake, WI:  -18 F
Margie, MN 3 ENE:  -15 F
Orr, MN 3 E:  -14 F
Embarrass, MN:  -14 F
Northome, MN:  -14 F
Grand Marais, MN (Airport)  -13 F
Littlefork, MN:  -12 F
International Falls, MN:  -12 F
Crane Lake, MN:  -11 F
Cook, MN:  -11 F
Bigfork, MN:  -11 F
Ely, MN:  -11 F
Grand Rapids, MN:  -10 F
Cloquet, MN:  -8 F
Duluth, MN (Airport)  -7 F
Grand Portage, MN:  -6 F
South Range, WI 4 SSE:  -5 F
Superior, WI (Airport)  -4 F
Hayward, WI:  -2 F
Sky Harbor, MN (Airport)  -2 F
Glidden, WI:  -2 F

Snow depth reports from around the Northland
Source:  http://www.weather.gov/dlh/

Note:  Snow depths listed below are as of 6 AM on March 10, 2017

Wolfridge, MN (ELC)  12"
Cook, MN:  9"
Ely, MN 25 E:  6"
Island Lake, MN 4 E:  6"
Orr, MN 3 E:  6"
Grand Rapids, MN 12 N:  7"
International Falls, MN:  5"
Cass Lake, MN:  5"
Kabetogama, MN:  5"
Embarrass, MN:  4"
Duluth, MN (Airport)  3"
Ely, MN:  3"
Wright, MN 3 E:  2"
Togo, MN:  2"

Weather Synopsis for northeast Minnesota and northwest Wisconsin

Very cold temperatures over the Northland today with highs only in the single digits to lower teens above zero.  Lots of sun today but there has been some high level clouds passing through southern portions of the area.

An arctic airmass will remain over the area tonight with clear to partly cloudy skies.  Lows will be in the single digits below to single digits above zero with teens below, and possibly a few 20s below in the typical cold spots.

Partly cloudy skies on Saturday with highs in the teens to lower 20s with lows Saturday night ranging from around 10 below to the single digits above zero.

High pressure of 1040-1050mb will continue to build south/east out of Saskatchewan Province through the weekend -- Reaching Ontario Province on Sunday.

The focus for Sunday and Monday will shift from cold to a potential snow event.  Low pressure is forecast to move east/southeast out of the northern Rockies late this weekend.  The surface low combined with a trough extending north into the upper Midwest should result in at least light snow in parts of northeast Minnesota and northwest Wisconsin from Sunday through Monday with about 1 to 3 inches of accumulation possible, with the higher totals most likely south of Highway 2.

The other thing to keep an eye on will be the wind direction.  Looks like the surface wind will shift to the east/northeast on Sunday, and could remain out of the east/northeast through most of Monday.  There is very little ice coverage over Lake Superior (Around 3% as of March 10th)  Lake water temps are sitting at around +2 degrees Celsius while temperatures at 850mb will be at around -16 degrees Celsius -- This is enough of a contrast to produce lake effect snow, or lake enhanced snowfall if system snows reaches our area.  Note:  Significant snowfall accumulations can't be ruled out from Sunday afternoon through Monday near Lake Superior due to the possibility for lake effect or lake enhanced snow.

Forecast for Duluth and Superior

.Tonight...  Mostly clear and cold.  Low 3 below to 8 below.  Wind northwest at 5 to 15 mph.

.Saturday...  Partly cloudy.  High 12 to 16.  Wind northwest at 10 to 15 mph.

Normal temperatures for Saturday

High:  32
Low:   16

Sunrise Saturday:  6:29 AM CST
Sunset Saturday:   6:09 PM CST

Tim