textproduct: Philadelphia/Mt Holly

WHAT HAS CHANGED

No significant changes.

KEY MESSAGES

1. High pressure will be in control through Wednesday night. A low pressure system then drags a cold front through the area Thursday night into Friday. This cold front is then followed by below normal temperatures this weekend.

DISCUSSION

KEY MESSAGE 1...High pressure will be in control through Wednesday night. A low pressure system then drags a cold front through the area Thursday night into Friday. This cold front is then followed by below normal temperatures this weekend.

High pressure continues to build in from the west today. Overnight, it will be overhead. For tomorrow, the high pressure system starts to move offshore and this continues into tomorrow night. This high pressure system will lead to tranquil weather conditions through tomorrow. We see plenty of sunshine today before more clouds arrive tonight and tomorrow. After a seasonably chilly day today, we see a gradual warming trend through Thursday. By Thursday, temperatures reach above normal as we continue to see warm air filter in.

A low pressure system that originates near the Midwest moves northeast into Canada. This low pressure system drags a cold front through the region Thursday night through Friday. Ahead of this cold front, rain develops Thursday night and continues through much of Friday with the passage of this cold front. Rainfall will mostly be on the order of 0.25-0.5".

Once the cold front exits the region, we see cold air advection filter in through the day Friday with temperatures looking to decrease through the day. This is followed by cooler conditions for this weekend. Highs will only be in the 40s on Saturday before warming back up closer to normal on Sunday. Dry this weekend as another high pressure system builds into the region.

AVIATION /18Z TUESDAY THROUGH SUNDAY/

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

Rest of Today...VFR. Winds becoming southwesterly at most terminals around 19Z at around 5 kt. ACY may favor a more southerly or southeasterly direction. High confidence.

Tonight...VFR with increasing high clouds. South-southwesterly winds generally 5 kt or less. Periods of light and variable winds overnight. High confidence.

Wednesday...VFR. A south-southwest wind around 5 kt. Mid and high clouds. High confidence.

Outlook...

Wednesday night through Thursday...VFR. No significant weather.

Thursday night into Friday...Sub-VFR likely in RA and low CIGs. Improving conditions Friday afternoon and evening.

Saturday through Sunday...VFR. No significant weather.

MARINE

Winds continue to gradually shift to be out of the south through this evening at around 10 kt. Overnight, winds become more out of the south-southwest at around 10 kt. Seas of 2-4 feet for the remainder of today before lessening to 1-3 feet overnight.

A south-southwest wind tomorrow morning becomes more southerly through the day tomorrow at around 10 kt with seas of 1-3 feet.

Outlook...

Thursday through Friday night...SCA conditions develop Thursday afternoon and continue through Friday. VSBY restrictions in rain and fog Thursday night through early Friday night.

Saturday through Sunday...Sub-SCA conditions with fair weather.

PHI WATCHES/WARNINGS/ADVISORIES

PA...None. NJ...None. DE...None. MD...None. MARINE...None.