Quick Shot Of Summer To Be Followed By Weekend Chill

Lilacs in the foreground, lilacs in the background on this
sunny, warm late May morning in Vermont. But some
"interesting" weather could arrive this weekend. 

It was definitely a soaker of a Memorial Day weekend in Vermont, with virtually everyone receiving at least three quarters of an inch of rain and most places going over an inch. 

The heaviest rain seemed to be in central Vermont, where two day totals included 1.8 inches in Hinesburg, 1.76 inches in Vergennes 1.71 inches in West Bridgewater and 1.68 inches in Warren. 

Also, the last of the snow melted atop Mount Mansfield over the weekend. There was no measurable snow up there for the first time since October 26.  

That's one of the longest "winters" Mount Mansfield has had. But is the snow really done for the season up there on Vermont's highest peak? Read on to find out. 

The clouds were frustratingly slow to move out yesterday afternoon, especially in  northern Vermont. But they finally did toward evening, giving us a short shot at summer for the next couple of days before annoyingly chilly weather returns. Things could get pretty interesting by this weekend. 

Here's how this will play out

TODAY

A squirt of very warm air has moved in from the west. Forecasters have bumped up expected temperatures today so it's going to actually feel kind of hot. Warmer valley floors should get into the mid-80s. Humidity levels should be reasonable, though, and there will be a nice southwest breeze.

WEDNESDAY

Yesterday, I told you about that Omega block setting up around the nation. This thing will make Vermont turn cool, and very cool by the weekend. Before we get there though, the first of a series of cold fronts will have come through by tomorrow, but it won't make too much of a difference. 

It should still get well into the 70s, with some low 80s in broader valleys, including the Champlain Valley. We'll call the skies partly sunny.

THURSDAY

Upper air weather forecast map for Friday night. Click on
image to make it bigger and easier to see. It shows an
upper level, cold low over us. Those blue lines indicate
that it could be cold enough to snow on mountain peaks.

Here's where we begin to feel the north winds. It'll still be sunny, but highs will only reach the 60s, with some low 70s south. That's actually a couple degrees cooler than average for this time of year. But still very nice. Then the fun begins.

FRIDAY

A pocket of very cold air, which looks like a bowling ball on weather maps, will race down from Hudson Bay and score a strike on us here in Vermont starting during the day Friday. It'll be overhead Friday evening into Saturday. 

Given that this is coming straight from dry northern Canada, you'd think there wouldn't be much weather coming out of this. But the dynamics in this "bowling ball" look like they'll be strong, so lots of showers will break out starting Friday afternoon and into Saturday. 

This is really cold air aloft for this time of year. Early guesses are that the snow level Friday night and Saturday morning could fall to 4,000 feet. So,  yes, it would snow on Mount Mansfield if this forecast is correct.

Even if it does't snow, it will be very cold and wet and windy in the mountains, so you might want to postpone your weekend hiking plans. 

SUNDAY AND BEYOND

Sunday looks chilly and showery, too, but probably not as bad as Saturday. After that, a slow warming trend should take hold next week, but it will probably remain cooler than average for at least the first half of the week.