March 20-21st Is it really a big deal?

Lets start off this afternoon by looking at the temperatures across the area.

Majority of the area is in the 45-50 degree range. Looking at the latest pressure chart..

We can see that high pressure is in charge across the east and that there is two areas of low pressure to the west. One of them is over Northeast Dakota and the other one is over SE Nebraska. Essentially it is one broad area of low pressure with two centers that will more or less merge together and will make there move across the Great Lakes region.

By Monday evening this low pressure should be over upper NY State. What this means is that this area of low pressure is going to pass to the NORTH of the region..

As you can see there is very little moisture presently to the south and majority of the moisture is around the Great Lakes region and essentially lifting off to the ENE. Majority of this precipitation should go NORTH of the region and the precipitation we pick up in PA should be on the lighter side of the equation with generally less then a half inch. A warm front will be crossing the region in association with the low pressure to the north and then this warm front will be followed by  a cold front. It is this warm front that may spark off some light rains across the area and depending on how fast cloud cover arrives..it could allow for some colder air to move in at the surface in the Poconos and NW NJ that may allow the precipitation to start off in the form of Snow and or Sleet. Again, these accumulations (if any) should be very light considering this past Friday temperatures were in the 70s in these locations.

All and all look for clouds to increase and the possibility of precipitation moving in later tonight.

Another system may effect the region around mid week with some more wintery weather possible into the same regions that could potentially experience some later tonight!