A whiff of spring next week; NYC thundersnow

The first week of March in Minnesota is still more winter than meteorological spring. It's also seriously beautiful.

Gradually warmer 

Temperatures budge slowly the rest of this week. Highs above freezing return this weekend.

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NOAA via Weather Bell.

I'm still watching a minor system that brings a chance of light snow to parts of Minnesota this weekend. So far the key words are "chance" and "light." Here's the Canadian GEM model version of events this weekend.

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Canadian GEM model via tropical tidbits.

40s likely next week

Milder air pushes north next week. A string of days in the 40s with a shot at 50 degrees by Thursday looks increasingly likely. Here's the early look at projected highs next Tuesday across Minnesota.

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NOAA

NYC thundersnow

Our latest powerful Nor'easter is pumping bands of thundersnow into New York City.

The National Oceanic and Atmospheric Administration resolution satellite images captured the convective snow bursts rolling into Long Island and New York City.

Intense updrafts within the icy convective snow bands generate electrical charge separation. That's what causes thunder snow.

Snowfall rates in convective snow bands often reach 1 to 3 inches per hour. This nor'easter is taking full advantage of a fire hose moisture plume from the Atlantic.

Shifting rain-snow line

We're not the only ones with forecast challenges centered on the infamous rain-snow line. Check out the evolving forecast from the Boston National Weather Service.