Thursday 9 a.m.
Today's video looks at the forecast ideas through the coming weekend.
A cold front moving toward the North Atlantic coast is responsible for cloudiness from Maine to parts of Pennsylvania this morning and a few showers have accompanied the front. Behind it, a high pressure area will advance southeastward from Wisconsin to reach Pennsylvania by tomorrow morning.
This picture shows the distribution of clouds around 9 a.m. EDT on Thursday, Sept. 5, 2013
Since the high represents the center of a cool and dry air mass, we expect a clear sky over the Northeast region tonight. Temperatures will fall toward autumn levels in the 40s and 50s from central Pennsylvania to New Jersey... and into the 30s farther north. Some normally cold spots could even have a touch of frost toward daybreak.
However, as the high pressure area moves off the East coast on Saturday, there will be a warmup back to late-summer style temperatures. Another cool front should swing through the Northeast on Sunday, but after a one day setback in temperatures (Monday), some very warm air will spread from the Ohio Valley all the way into much of the Northeast for the middle of next week.
Putting the forecast another way:
September is "Be Kind to Writers and Editors" month. Individuals in these fields always have to worry about parts of speech and elements of style. Authorwise, people will accuse them of writing syllibul, & the writer will diacritical death. We must choose our words carefully in the weather business. Why? We want to be write when we say what to wear when & how.
Tonight, low-level air will be coming from the north, so it will be cool by definition. Also, tomorrow will be renound for being a good day to visit grammar's place. That partisimple. What makes us tense is deciding whether an area of showers with a weak cold front Sunday will run on and dash past us, or if instead we have to give you a footnote and say you might need shoe protection against showers.
We don't want to hyphen the idea it'll rain just to adverbs. But, the forecast wouldn't be very phraseworthy if we put the accent on sunshine and it turns out showery for a period. One meteorologist said he felt a pronounced tendency to feel tense before he gave the forecast, and then he felt better enunciate breakfast.
When we look more closely, we see a variety of disturbances embedded in the main current, each capable of temporarily increasing or cutting off the chance of snow. This map shows the setup:
This map shows the circulation around the offshore storm and a larger but less intense storm moving into the Great Lakes. With this sprawling storm likely to be in the region for several days, the weather can vary widely.
...speculation about a snowstorm Monday or Tuesday, and one is still possible. However, timing and placement remain elusive. This map shows the GFS ensemble mean "solution" for Tuesday morning showing snow just off the New England coast. Watch this story evolve on accuweather.com all weekend.
As we look father out this month, it looks cold for the Great Lakes and Northeast (as well as deep into the South) in the middle of next week but milder the following week. This map, for next Wednesday, shows a cold flow from way north in Canada.
A few tornadoes can also occur, especially from Mississippi and Alabama to Kentucky. This map shows the areas of potential severe weather through tonight as forecast by the NWS Storm Prediction Center.