The Executive Summary is as follows:
Low Pressure will continue to intensify as it moves slowly out to sea through Friday, providing the region with a prolonged period of onshore flow. Northeast winds will gradually turn to the north Thursday morning.
The major threat from this system is now tidal flooding along the Atlantic Coast of both NJ and DE, the Delaware Bay, and the Raritan Bay. Water levels with the high tide this afternoon into this evening are expected to reach moderate flood levels in these areas, with the overnight high tide Wednesday night into Thursday morning expected to reach moderate to major water levels. Coastal Flood Warnings are in effect. Minor tidal flooding is also possible on the tidal Delaware River where a Coastal Flood Advisory has been issued. Only pockets of minor flooding are expected on the Chesapeake Bay, so no advisory has been issued for that area, but we will continue to monitor the situation. Please note that minor to moderate flooding will continue to be a concern at the times of high tide through Friday.
Winds gusting to 60 MPH along the Delaware and southern NJ coasts this afternoon will continue through the evening…then gradually subside during the late overnight hours. High Wind Warnings continue through tonight for the entire NJ and DE coast, with Wind Advisories for gusts in the 35 to 45 mph range further inland, even in eastern PA.
Precipitation has fallen mainly as rain today. A changeover to snow is still expected late this afternoon or evening in some places (mainly north of I-95), but by then most of the moisture associated with the exiting low pressure system will be off the coast. Wherever snow does fall…accumulation should be confined mostly to grassy surfaces since road surfaces are still well above freezing. Winter Storm Warnings in Chester County and Cecil County have been downgraded to Winter Weather Advisories, and locations which WERE under Winter Weather Advisories have been cancelled because snowfall totals will not reach Advisory criteria.
No river flooding is expected from this event.
check our website for up-to-date information: www.weather.gov/phi
Another briefing package will be issued Thursday morning only if conditions
The briefing package is also available at http://www.erh.noaa.gov/phi/briefing/packages/current_briefing.pdf