Warm Air Advection | NY NJ PA Weather Forecasts

Tag Archive for 'warm air advection'

Cold start, moderating trend the story of this weekend

December 12th, 2009 by Steven DiMartino

7:40 AM
This is why I love winter, and we aren’t even at the meteorological start of winter (December 21), because there is so much to talk about and so much to cover. Sometimes it is a bit overwhelming on where to start, but of course lets start with the here and now!
This morning, much of [...]

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Low pressure this weekend acts more like a warm front

December 11th, 2009 by Steven DiMartino

7:28 AM
This morning, high pressure is the dominant player over much of the northern Mid Atlantic with temperatures bottoming out in the mid to upper 10’s over the interior and lower 20’s to lower 30’s along the coast. Naturally, the urban areas of the Philadelphia and New York City metropolitan are the warmest this morning. [...]

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Thoughts On The 12Z Guidance So Far

January 27th, 2009 by Steven DiMartino

11:28 AM
So far, the 12Z NAM and part of the 12Z GFS has come out and there are some points I like to make.
There are some comments that the GFS/NAM are warmer. Given the account for some error, the rate of warming at 850 MB is about the same. The warm air at 850 [...]

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Virga Building, Carefully Monitoring

January 18th, 2009 by Steven DiMartino

2:50 PM
If you are wondering why I am not shooting out rapid updates, it is because I am trying to be very careful in what I am seeing this afternoon.
Personally, the issue at hand is I don’t want to go off screaming snow storm developing and then it does. That would kill my credibility of [...]

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Careful Thoughts

January 18th, 2009 by Steven DiMartino

1:15 PM
The past few hours sure have been interesting in model guidance and when looking at the observations.
Precipitation is breaking out over the Delmarva, Maryland, and beginning to develop all over Virginia. Pressure falls are still developing over the Southeast, but the primary low is still in the Great Lakes. As a result, warm air [...]

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Come On Charlie Brown, I Won’t Pull Away The Football!

January 12th, 2009 by Steven DiMartino

7:20 AM
Do you remember the cartoon where Lucy is holding the football and teasing Charlie Brown to come along and kick the ball. Charlie knows Lucy is just going to pull the ball away, but he goes with it anyway. This situation seems just like that!
Side tangent, if that happened today, Charlie could have sued [...]

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A Very Icy Night Setting Up Away From The Coast

January 6th, 2009 by Steven DiMartino

7:48 PM
Right now, if you are along the immediate coast, your snow and ice worries are all but over. The strengthening warm air advection off the Atlantic supported by the developing 850 MB low over the Tennessee and Ohio Valley has warmed the majority of the atmosphere above freezing, thus producing all rain for coastal [...]

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Colder Environment Setting Up Icy Weather For Interior

January 6th, 2009 by Steven DiMartino

7:27 AM
The first observation I noticed throughout the forecast area was how dry the air was. This is a big deal everyone for one simple reason. Evaporational cooling.
The precipitation seen over Delaware and Maryland will slowly push north today, as high pressure gives way over the next 8 to 12 hours. Clouds will continue to [...]

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The 12Z Guidance And Thoughts For Friday

December 29th, 2008 by Steven DiMartino

8:59 PM
If you put your ear to the ground, you could hear the fall of a million snow lovers faint to the ground after seeing the 12Z GFS, which basically if taken verbatum would produce a significant snowfall for most of the forecast area, save southern New Jersey (even that location would still get measureable [...]

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Icy Conditions This Morning Gives Way To Warm Air

December 24th, 2008 by Steven DiMartino

6:30 AM
The snow pack in place over the interior is doing its job of slowly down the warm air advection at the surface, which is supporting an area of freezing rain over locations north and west of the Philadelphia and New York City metros. Freezing rain even feel briefly along the coast before temperatures have [...]

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