Weather by Tim Kelley
Friday April 24th, 2015 - 12:57 pm
The Jay Cloud - Late April Style!
Vertically stacked Low Pressure, that means cyclonic air flow from earth's surface to the tropopause, has stalled in the perfect position to generate a late season Jay Cloud.
A refresher on how the famous Jay Cloud is generated.
Moisture is drawn from the tropics to eastern Canada, then pulled back into Ontario, where it mixes with cold air drawn from the North Pole. The vertically stacked low pressure system is doing the drawing. Then due to our geographic good fortune (the first mountain off the plains of southern Quebec), the moisture lifts, cools, and condenses into “Jay Cloud” snowfall. The snow began Wednesday April 22, and continues into our final weekend of continuous operations. Of course the cold and wind are also part of the equation. High elevation powder drifts are here for our last Saturday of April... maybe Sunday too.
These vertically stacked low pressure systems can only last so long. Eventually the cold air and moisture run low and it shuts down. That shut down process is very slow this time. The result is a continuation of Jay Cloud snow through Saturday night April 25. As snow lets up, so does the wind and chill.
Temperatures are moderating, and the snow level is rising Sunday. We may end up a tad damp Sunday (it is nearly May after-all). Having the Tailgate party last Sunday was a stroke of genius! What a great sunny calm day that was.
Warm weather and sunshine is bound to return again, but not until the second or third week of May.
The big question for next week is how high will the snow level get?
Another cold stacked low is forecast to develop almost as quickly as the current one fades. It may rain a bit next week, but new cold is on the way, and more snow, maybe even a major May 1st-ish big dump.
The weather around here is never boring, so why not end an epic season with an epic snowfall?
You have not heard the last of me, nor the last of winter 2014-2015.
Who is Tim Kelley?
A native Cape Codder, Tim says "Dad taught me how to read Barometer, Mom taught me how to smile."
He learned to ski at Blue Hill near Boston 4 decades ago. But it was Burke Mountain Vermont where I was exposed to big mountain skiing while earning his B.S. in Meteorology at Lyndon State College, class of '87.
Tim has started his weather career at WMUR Manchester NH, then went to WLNE in Providence RI, before settling at his current TV gig, New England Cable News (NECN) in 1992. You can also see his surf and ski reports on SkiTheEast.net, Boardliving.com, and SurfSkiWeather.us.
He says "It's an honor to be part of The Jay Team, look for me in TIMbuktu!"