Thursday, March 23, 2017

Rain showers tonight with areas of mixed precip and perhaps a thunderstorm! 30s and 40s for Fri; Gusty NE wind near Lake Superior Fri night-Sat

/Issued 5:19 PM CDT, Thursday, March 23, 2017/


Radar loop through 4:45 PM CDT Thursday.  Source:

Pink=Mixed precip

Purple shaded areas on map=Winter Weather Advisory.  Note:  These advisories for a few areas could be cancelled earlier than the expiration times which are shown on the map   Source:

There is a risk of a few thunderstorms over most of the Northland tonight but no severe weather is expected in our area.  Source:


The risk of severe thunderstorms for Friday shifts farther south compared to tonight.

Tonight's low temperature forecast.  Source:

Friday's high temperature forecast.  Source:

Weather Synopsis for northeast Minnesota & northwest Wisconsin

A gray day with near to slightly below normal temperatures with highs mostly in the mid 30s.  Scattered snow showers passed through parts of the area early this morning with snowfall less than an inch.  Additional precipitation in the form of rain showers have been moving through parts of the Northland this afternoon but radar and surface observations have shown a mix of precipitation and even plain snow falling this afternoon especially north of the Iron Range.

A southwest flow aloft covered the upper Midwest this afternoon with an upper trough over the central/southern Rockies.  The trough will move out into the southern/central Plains the next few days  while low pressure moves from eastern Colorado this afternoon to the Missouri-Illinois state line by Saturday evening -- This system won't really impact us too much after tonight as our area will be more under the influence of an area of high pressure which builds south out of Manitoba and Ontario Province through the weekend, this high will pump dry air south into our area which will help keep the steadier rain well to the south of the Northland after tonight.

For tonight, occasional rain showers with a chance of a few thunderstorms.  Elevated instability is forecast to increase especially this evening with CAPE possibly getting into the 100-500 j/kg range over parts of the area, this would support a thunderstorm risk with lightning, heavy downpours and perhaps some small hail being the main threats if storms do develop.

The other concern for tonight will be the surface temperatures and will they drop enough to support a risk for icing.  Temperatures are expected to fall into the 30 to 33 degree range this evening so pockets of freezing rain, sleet and wet snow are likely to develop over parts of the Northland but I don't think the freezing rain will be very widespread but if it does develop expect deteriorating road conditions, especially secondary roads.

Lows tonight in the low to mid 30s, highs on Friday in the mid 30s in far northeast Minnesota with 40s over the rest of the area.

Friday should be mainly dry although some rain showers could affect far southern portions of northwest Wisconsin.

Note:  Northeast wind strengthens near Lake Superior Friday evening with gusty winds into Saturday with wind gusts of 25-30 mph possible.  There could also be some patchy drizzle, freezing drizzle or snow showers at times around Lake Superior Friday night and Saturday.

Forecast for Duluth and Superior

.Tonight...  Occasional rain showers with some freezing rain, sleet or wet snow also possible.  An isolated thunderstorm is also possible.  Low 31 to 33.  Wind southeast at 5 to 15 mph becoming north.

.Friday...  Mostly cloudy with some clearing possible in the afternoon.  High 40 to 45.  Wind north to northeast at 10 to 15 mph.

Normal temperatures for Friday

High:  38
Low:   21

Sunrise Friday:  7:03 AM CDT
Sunset Friday:   7:27 PM CDT