Good Morning, Thunderstorms yesterday were heavy and gusty in portions of the mid-Atlantic region… Actually, there were some of them in the Northeast, too… A rather “unique distribution” of showers and heavier thunderstorms managed to elude New York City and much of New Jersey, while hitting southern Connecticut and the Hudson Valley rather hard… Also, much of northeastern Pennsylvania managed to ‘miss out’, while some very potent thunderstorms knocked out power for more than 50,000 customers in the Greater Washington, D.C. and Baltimore metropolitan areas… Peak wind gusts of close to 60 miles per hour near Lancaster, Lebanon and Philadelphia led to downed trees and utility lines… But perhaps the “silver lining” behind these dark storm clouds was: there were no widespread reports of hail… During the middle of last week, a hail storm that crunched eastern Pennsylvania still has many auto body and windshield repair shops working overtime! We’ve been discussing our latest feature, a back-door cold front, since the start of the week… It is still ‘on the move’ early this morning… In fact, there were some pretty impressive temperature drops within a very short time frame late last evening across Connecticut and in southeastern New York… Bridgeport, Connecticut had their airport’s temperature drop twelve degrees in a span of eleven minutes, and both New York City’s Central Park and LaGuardia Airport had the mercury plunge by more than ten degrees within a hour on either side of midnight… It is safe to say now that in those areas which didn’t get any appreciable rain in the Northeast yesterday certainly aren’t going to avoid being dramatically cooler later today… Most temperatures in these places will fail to get out of the 60s this afternoon… Temperatures today at the Jersey Shore, in Delaware and in southeastern Pennsylvania will probably begin falling from morning levels in the upper 60s and lower 70s — some more quickly than others… There will be a couple of showers around today and early tonight, with any threat for thunder and lightning being much more diminished in those areas where the marine influence has taken over… High pressure located in eastern Canada and in northern New England early this morning is going to sink to the south during the next 36 hours… So, it makes perfectly good sense to assume that the back door cold front will continue to plunge southward, too… We need to be careful, though, about just how we portray the sky cover and weather forecasts across the Eastern Region tonight and early tomorrow morning… For example, while there is probably going to be some clearing, or a ‘partly cloudy sky’ tonight in southeastern New York and in New England, there’ll be considerable low clouds, some fog and drizzle in South Jersey, near Philadelphia and in the Delmarva Peninsula… That zone which is ‘socked in’ with low clouds tomorrow afternoon will be mostly south of the Mason-Dixon Line… So, it’s perfectly reasonable to expect that cities like New York, Hartford and Boston will have at least a few hours of sunshine on Thursday, while it will be limited (or, not seen at all) in Maryland, Delaware or eastern Virginia… On Friday, a modest warming trend will be getting underway, although there should be a tendency for this front to cause another round of showers as it tries to reverse its course… It’ll be met with a lot of resistance, but that zone of high pressure located near the Northeast Coast will slowly begin to weaken late on Friday and Friday night… For the most part, temperatures east of the Appalachians will be in the lower or middle 70s… We’re very worried about promising a completely dry day on Saturday, at least in southeastern New York, northern New Jersey, northeastern Pennsylvania and all of New England… There is going to be a “cut-off” area of low pressure at the start of the weekend, parked just off the coast of New England… And, with the models all seeming to suggest that there will be a parcel of jet stream energy rotating around this feature, or diving out of the north on Saturday afternoon, there can be a couple of showers and even a thunderstorm in those aforementioned places before the day is through… Actually, one of these models insists the vigorous impulse of energy will be sliding across southeastern New York during the late-morning hours… With this in mind, we must allow for a shower/thunderstorm on Saturday at any time from central New Jersey on north and east… Temperatures again will be in the 70s… June arrives on Sunday, and we do expect a gradual warming trend to take place early next week… Have a good day!
Posted on: Wed, 28 May 2014 08:21:09 +0000
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