Good Evening All,

Well, the warmth will begin attacking the cold here at the surface by this time tomorrow night.

The culprit is a strong upper air system leaving the desert southwest and a building area of high pressure off the Southeastern United States Coast.

Both of these systems will act together to erode the very cold air we have been seeing here in the Middle Atlantic States.  As their is no NAO Blocking this storm will come right up at us in front of the next Arctic push and bring a rainstorm to the Delaware Valley with even some minor stream flooding possible.  As the NAO is Positive their is nothing to lock in the cold we have been having and deflect the storm south or spawn secondary development at the coast to the disappointment of snow lovers in the Northern Middle Atlantic.

Take a look below as the warm air invades from the Southwest! There will likely be enough mixing of the Upper Atmosphere to get our temps near or just past 60 degrees here on Wednesday into Wednesday Night it is not out of the question to get some rare January Thunderstorms very late Wednesday Night or Thursday at the very least some heavy downpours.  It appears we have over an one to two inch of liquid type of event and it is most likely all rain.

The Warming will however come at a price Monday in the form of some snow changing to sleet then freezing rain for a time especially Philadelphia North and West.

While we will warm up this week the warmth will be brief as more cold air will rush down from Central and Eastern Canada by weeks end behind a fairly strong cold front on Thursday.

Warm air over the top of very cold grounds is a recipe for Freezing rain though on Monday at this point it looks to be after the Morning Rush Hour but we shall see.  There could always be a bit of freezing drizzle get in early which could set up for a very tricky commute Monday.

Source: Hamweather.com

0z Nam:

10m Freezing line is south of Wilmington Delaware and the Mason Dixon Line so we do have to watch for some snow, sleet, then freezing rain with freezing rain being the biggest threat!

I would think at this point Winter Weather Advisories may be needed for Monday Morning especially Northeastern Maryland, Northern Delaware, Western and Central New Jersey points north and west.

School Closing Meter is at 30% mainly because of timing which appears to be after the morning commute but freezing drizzle can be sneaky if it gets in here earlier.

Thanks for Reading

WildWeather

Kevin Reilly

Liveweatherblogs.com