Seasons In Conflict
Posted by Pete Bouchard
Winter and spring are slugging it out in the next 24 hours, and we have a ringside seat.
Cold air is pushing south from Quebec and Ontario. While that isn't anything unusual, it comes at an inopportune time. Clouds and precipitation are moving in at the same time. Typically, that would mean the temperatures would level off or slightly rise overnight. Not this time...by morning many of us will be in the low and mid 30s!
This isn't a time to panic, however. We're talking sleet here.
The precipitation that comes from the cloud first starts as snow. As it falls, it encounters some warm air that melts it into raindrops. Those drops keep falling, and then they encounter a layer of cold air that refreezes them. Instead of snowflakes we get ice pellets or sleet. Sleet is better than freezing rain. Sleet bounces, freezing rain glazes (on EVERYTHING...think ice storm).
Got it? Good.
After the "warm" air pushes in by late AM, we'll go over to all rain, which may add up to an inch or more by late Friday night. Winds will whip at the coast, but be deflected by the cold Metrowest and throughout the Merrimack Valley and Southern NH. All told though, it will be a nasty day.
In contrast, the weekend is looking pretty good. A get-out-and-prep-the-lawns-and-gardens kinda day. Plenty of sun and on the lower end of 60 (fancy talk for upper 50s).
Next week's warmup is a little stunted thanks to the arrival of a cool front. Either way, we're still WAY above normal, and the 70s will come home to roost once again.