By Lauren Casey

PHILADELPHIA (CBS) — Snow has been overspreading the Delaware and Lehigh Valleys over the last several hours and is now falling across much of the region, with the exception of the New Jersey coast and southern Delaware. That’s where the precipitation type is and will remain rain.

A Winter Weather Advisory is effect for Philadelphia and surrounding counties until 10 p.m. tonight, and for the Lehigh Valley, Berks and our far northern and western suburbs until 1 a.m. Monday. A Winter Storm Warning is in effect for the Poconos through noon Monday.

READ MORE: Philadelphia Weather: Heat Advisory In Effect As Temperatures Hit Record Highs On Saturday

Later this evening, as warmer air builds in on an easterly wind flow, the snow will transition to a wintry mix, featuring possibly both sleet and freezing rain (ice), then over to plain rain for most neighborhoods by 10 p.m. We could see a quick couple of inches of snowfall accumulation in greater Philly prior to the changeover.

Watch for very slippery conditions on the roads as the ground temperature is sub-freezing and will remain so for at least several hours even after the warmer air moves in and the dominant precipitation type changes to rain.

Coopersburg in Lehigh County is reporting 4 inches of snow as of 11 p.m. Other counties in Pennsylvania are reporting snow ranging from an inch to 3.5.

READ MORE: Jeffrey Weikel Arrested After Allegedly Firing AK-47, Shotgun At Bensalem Police During Barricade Situation

 

Strong, gusty winds will also impact the region overnight and will begin to really start cranking after 9 p.m. this evening, with gusts of 45-50 mph possible. This could lead to localized power outages. The winds will be coupled with steady rain, some heavy at times with the possibility of a few rumbles of thunder. The frozen ground will be problematic in this scenario as well as it will lack the ability to absorb the rainfall, which could produce localized street flooding.

The main energy from this powerful storm system will exit by 5 a.m. However, windy conditions will persist through the day on Monday and wrap-around moisture will contribute to off-and-on snow showers into the evening hours. Scattered light snowfall accumulation is possible in some neighborhoods.

For the latest developments with the storm follow us here online, streaming on CBSN Philly and on social media.

MORE NEWS: Where To Find Cooling Centers In Philadelphia This Weekend

You can also download the CBS Philly App for all the latest in Philadelphia news, sports, weather, and more!