According to the Accumulated Winter Season Severity Index (AWSSI) much of Minnesota has experienced a "mild" winter so far. I think we can all agree on that. This index takes into account "the intensity and persistence of cold weather, the frequency and amount of snow, and the amount and persistence of snow on the ground."
No surprise that with the constant freeze/thaw this season many metro lakes are not yet frozen. The term "ice in" is defined as being "the date when the entire lake is frozen over for the first time and the ice cover endures for the remainder of the winter." Lake Calhoun typically freezes over on December 10. The latest ice in date in December 31, 2001. Interesting to see how late the ice in date will be this season.
Thunder in December? It is rare, but it happened this past Wednesday. Only two other time has the Twin Cities experienced thunder in December.
The jet stream manages to keep the arctic air well north of Minnesota through next week. Above normal temperatures and a benign weather pattern could mean very little snow on the ground come Christmas day.
Summer brings warm afternoons perfect for biking, but the summer heat and humidity can also spark thunderstorms and severe weather. Be prepared for any type of adverse weather headed your way with Aeris Pulse.
NWS Twin Cities Weather Story