Alternating chill and mildness this week in the Northeast
By Elliot Abrams, AccuWeather chief meteorologist
2/12/2018, 11:02:26 AM
1. In the wake of a cold front that is moving out to sea, colder air is moving into the Northeast today. A band of snow moved in with the cold air from western Pennsylvania into West Virginia, but that result is not expected to be repeated in the I-95 corridor. This is the surface pressure map from 8 a.m. ET:
2. The following maps show alternating periods mildness and chill this week into next:
On Wednesday, the flow coming over the Middle Atlantic states looks like it originates in the Southwest. Cold flow across Canada is heading east rather than south. However, by the start of the weekend, colder air is advancing into the Northeast as shown here:
However, the chill does not look like it will persist. The flow aloft over the Northeast will become westerly and then southwesterly. By next Tuesday, it would be much milder than average. However, there will also be a stream of moist air heading toward the region from the Gulf states. If widespread cloudiness develops, it will diminish the warmup.
3. Meanwhile, in the upper stratosphere we may be seeing the start of a cold/stormy signal. The main vortex looked squeezed late last week (first map) and has now split. It is important to realize that the "signal" does give much information about where the biggest changes in pattern will show up.
It will be interesting to see how this situation turns out.
The views expressed are those of the author and not necessarily those of AccuWeather, Inc. or AccuWeather.com
Comments that don't add to the conversation may be automatically or manually removed by Facebook or AccuWeather. Profanity, personal attacks, and spam will not be tolerated.
Elliot Abrams - December 11, 2018, 9:18:49 AM EST
Elliot Abrams - December 10, 2018, 9:40:09 AM EST
Elliot Abrams - December 07, 2018, 11:05:45 AM EST
The surface map shows a cold high pressure area over the Midwest and the area of low pressure in northeast of New England.
Elliot Abrams - December 06, 2018, 10:16:11 AM EST
Elliot Abrams - December 05, 2018, 9:37:15 AM EST
Elliot Abrams - December 04, 2018, 9:16:46 AM EST
Elliot Abrams - November 30, 2018, 11:07:06 AM EST