textproduct: Philadelphia/Mt Holly

WHAT HAS CHANGED

Expired the Freeze Warnings and Frost Advisories at 9 AM and updated Key Message 2.

KEY MESSAGES

1. Elevated tide cycles persist due to Post-Tropical Cyclone Josephine well off the coast, resulting in widespread minor coastal flooding continuing for back bay areas in Ocean County, NJ and Sussex County, DE.

2. More frost and freeze impacts expected tonight where the growing season continues.

DISCUSSION

KEY MESSAGE 1...Elevated tide cycles persist due to Post-Tropical Cyclone Josephine well off the coast, resulting in widespread minor coastal flooding continuing for back bay areas in Ocean County, NJ and Sussex County, DE.

Post-Tropical Cyclone Josephine has pulled away from the region as it's now over the Canadian Maritimes. However elevated water levels persist, mainly in the back bay areas of Ocean County, NJ and Sussex County, Delaware. The Coastal Flood Advisory for these counties is in effect until 6 PM Saturday.

KEY MESSAGE 2...More frost and freeze impacts expected tonight where the growing season continues.

The Freeze Warnings and Frost Advisories were allowed to expire at 9 AM. Temperatures this morning dropped to at or below freezing in many areas across portions of eastern Pennsylvania and New Jersey. Given the widespread freezing temperatures that occurred, it has been determined the 2026 growing season has ended for the following counties...

In Pennsylvania...Berks, Lehigh, Western Chester, Western Montgomery, and Upper Bucks counties.

In New Jersey...Morris, Hunterdon, and Somerset counties.

No additional frost/freeze headlines will be issued for these counties until Spring 2027.

The synoptic pattern will not change much today with an upper- level ridge across the Midwest shifting eastward through the weekend. This will support strong surface high pressure shifting eastward into the Northeast and Mid-Atlantic through the weekend.

A chilly and dry airmass will remain with this strong surface high, and as the high itself settles more overhead, forecast soundings show surface winds decoupling again tonight. This will set the stage for additional efficient radiational cooling tonight. The forecast lows for tonight will once again drop to the upper 20s to mid 30s for much of the area (with the only exception along the immediate coastal strip) with a favorable setup for frost and freeze. Another set of some frost and possibly freeze headlines will be issued at a later time today.

AVIATION /13Z SATURDAY THROUGH WEDNESDAY/

The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY and surrounding areas.

Today...VFR. Winds 5 kts or less favoring a north to northeast direction early, then shifting more easterly and becoming variable after 18Z. Winds may become calm at times. High confidence.

Tonight...VFR/SKC. Calm winds. High confidence.

Outlook...

Sunday through Wednesday...VFR. No significant weather expected.

MARINE

A Small Craft Advisory continues for much of the New Jersey and Delaware nearshore waters. We have removed one more zone (ANZ451) from the group however. Winds will remain rather light today and tonight with speeds mostly under 10 knots. We continue to see seas of 3 to 4 ft across the North NJ waters and closer to 5 ft for the Southern NJ and Delaware waters. seas will continue to decrease today from North to South. SCA flags continue in the afternoon. Thereafter, no marine hazards are expected through the remainder of the weekend.

Outlook...

Sunday night through Monday...The conditions should be below Small Craft Advisory criteria.

Tuesday and Wednesday...SCA conditions possible with seas around 5 feet.

PHI WATCHES/WARNINGS/ADVISORIES

PA...None. NJ...Coastal Flood Advisory until 6 PM EDT this evening for NJZ020- 026. DE...Coastal Flood Advisory until 6 PM EDT this evening for DEZ003- 004. MD...None. MARINE...Small Craft Advisory until 6 PM EDT this evening for ANZ452>455.