Monday, March 20, 2017

Turning windy and colder late tonight; Tuesday's highs ~20 degrees colder than Monday

/Issued 4:47 PM CDT, Monday, March 20, 2017/

Source:  20z HRRR model wind gust forecast for later this evening;

Tonight's low temperature forecast.  Source:

Tuesday's high temperature forecast.  Source:

Weather Synopsis for northeast Minnesota and northwest Wisconsin

A real nice first official day of spring as morning clouds gave way to mostly sunny skies by the afternoon hours.  Above average highs today with temperatures in the mid 40s to low 50s.

A strong cold front will move through the Northland this evening and this will signal a return to below average temperatures for the next few days.

Partly to mostly cloudy skies for tonight with a few flurries or snow showers possible mainly over far northern Minnesota.

Should be dry Tuesday and Wednesday, however, with the cold air moving over Lake Superior there could be some lake effect snow showers Tuesday along the South Shore, and then Wednesday there will be a chance for a few lake effect snow showers along the North Shore as winds shift around to the east.  Note:  Not expecting much in the way of snow accumulation though as the airmass will be fairly dry.

Low temperatures tonight will be in the single digits and teens in northern Minnesota with lower 20s in far southern portions of the area.  Highs Tuesday will be in the 20s and 30s (~20 degrees colder than Monday's highs)  Lows Tuesday night will be in the single digits and teens with highs Wednesday in the mid 20s to mid 30s.

Note:  The amount of cold air advection that will take place tonight will be quite impressive as afternoon 850mb temperatures were sitting at around 0 degrees C, but by late tonight those will drop off to between -10 and -17 degrees C.

Expect a period of gusty northwest winds to sweep NW-SE across the Northland tonight as the cold air rushes in.  Wind gusts of 25 to 35 mph are possible.

Forecast for Duluth and Superior

.Tonight...  Turning windy and colder late.  Mostly clear.  Low 12 to 17.  Wind west at 10 to 15 mph becoming northwest at 15 to 25 mph with gusts over 30 mph late.

.Tuesday...  Colder.  Mostly sunny.  High 26 to 30.  Wind northwest at 10 to 20 mph.

Normal temperatures for Tuesday

High:  36
Low:   20

Sunrise Tuesday:  7:09 AM CDT
Sunset Tuesday:   7:23 PM CDT