Rain and windy continues through this weekend
Heavy rain and winds sustained at 15 to 25 mph have been observed since last night as the first round of heavy rain continues to move through the Philadelphia and New York City metropolitan area.
A break in the heavy rainfall is expected for late this morning into the early afternoon hours as a new coastal low takes shape once again. As a new area of strong lifting develops over eastern portions of North Carolina and over the coastal waters of the Mid Atlantic, an area of sinking air has developed over Delaware and Maryland, which will push north over the Philadelphia and New York City metropolitan area. This break in the heavy rainfall will be marked by continued windy conditions, drizzle, and generally raw conditions with temperatures in the 40's to lower 50's.
As the new coastal low takes hold and intensifies this afternoon and evening, another round of heavy rain is expected with sustained winds of 20 to 40 mph along the coast with gusts over 50 mph, perhaps exceeding 60 mph over the coastal waters. Further inland, winds will be weaker due to increased friction of the land, thus winds will range from 15 to 30 mph with gusts exceeding 40 mph at times. The heavy rainfall combined with the strong winds will have a variety of impacts from coastal flooding to flash flooding, wind damage, low visibility, and significant driving difficulties. Further, there is a potential for power outages and falling trees due to the duration of the strong winds over the area. Rainfall amounts through tomorrow are expected to range from an additional 1 to 4 inches of rain with the heaviest rain expected over southern and central New Jersey, the five boroughs of New York City, Long Island, and southern Connecticut. The worst conditions are expected from 3 PM this afternoon on through 6 AM Sunday morning.
The low pressure system will slowly lift north and east on Sunday with lingering showers, heavy at times, through the day and into the overnight hours. Showers will linger into Monday morning followed by clearing conditions and a drying northwesterly wind.
The rest of next week and into next weekend is looking excellent with strong high pressure in control and temperatures returning to near to above normal levels in the 50's and 60's. So consider this weekend as an excellent movie weekend and next weekend the a time to be outdoors and enjoying the great weather conditions!
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The coastal low is clearly becoming the primary low pressure system this evening as very strong lifting is developing off the coast along with a classic satellite signature of cyclogenesis.
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hydroplaning a significant issue when attempting to slow down or stop.

The water vapor satellite picture this morning shows a very complicated upper level pattern over the eastern half of North America. However, the key to understanding this forecast can be found in the Canadian Maritimes. That area of dry air seen as black over Maine and Quebec, Canada is due to sinking air associated with an upper low over the Canadian Maritimes. This is a feature of the east based negative NAO and is currently supporting a strong area of high pressure over Quebec and northern New England. If not for this block over the northern Atlantic, this entire upper level pattern would not be able to produce a heavy rainfall event much less a long duration rainfall event because the various upper level disturbances to the west would simple exit into the Atlantic with little delay. However, due to the blocking in the Atlantic, several upper level disturbances will be able to interact and intensify along the East coast.
The storm is currently separated into several different pieces from the Plains to the Southeast coast. The first piece is over the southern Plains which is a disturbance that will be phasing with the second piece over the northern Plains, which is the strong upper low. Of course, not to complicate matters even more, a coastal front is forming along the East coast, while a strong Sub Tropical Jet stream is driving moisture from the Pacific right into the Southeast coast. So, does everyone got that? Okay, let's move forward! 


The easterly fetch developing at the mid and lower levels of the atmosphere is already influencing the northern Mid Atlantic as Atlantic moisture moves into the coastal plain. The combination of relatively light winds and high moisture levels has lead to the development of fog throughout the Philadelphia and New York City metropolitan areas and down through the New Jersey coast. Visibility around 2 standard miles for most locations. 



