This Spring has been anything but warm.  But not only is it going to warm up today, we're also going to get our first taste of Summer.

Highs Today
NCM

It's been over a month since it hit 70 degrees in Portland and you have to go back to last Autumn for the last 80 degree day in both Portland and Bangor.  There's a solid chance that some Western Maine towns do just that later today.  A line of storms will form as the warmth and humidity surges in.

Timeline
NCM

Storms will first fire in the mountains around 2 PM.  There will be clusters and broken lines of showers and storms.

Timeline
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That line will work out of the mountains during the middle of the afternoon and approach the coastline between 4-6 PM this evening.  Most of the action will end by sunset.

Timeline
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The largest concern with these storms this afternoon is for damaging wind gusts and hail.  But, there's also a non-zero chance of a brief tornado spin up.

NCM
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Most atmospheric profiles indicate unidirectional winds, but there may be just enough turning in the lower levels for a few storms to rotate and perhaps produce a brief tornado touch down.

Atmospheric Profile
NCM

We'll keep you posted throughout the day.

Todd - Follow me on Twitter and Instagram.