textproduct: Philadelphia/Mt Holly
This forecast discussion was created in the public domain by the National Weather Service. It can be found in its original form here.
WHAT HAS CHANGED
The Small Craft Advisory for NJ and DE Atlantic coastal waters as well as the lower Delaware Bay has been extended through 9 AM this morning.
KEY MESSAGES
1. High pressure will be in control for most of this week with seasonable and dry conditions. Low pressure impacts the area Thursday night through Friday. Below normal temperatures this weekend.
DISCUSSION
KEY MESSAGE 1...High pressure will be in control for most of this week with seasonable and dry conditions. Low pressure impacts the area Thursday night through Friday. Below normal temperatures this weekend.
High pressure builds in from the west and will pass over the area today before moving offshore tonight. Sunny and seasonably chilly today, then temperatures warm up a bit on Wednesday under increasing clouds. Temperatures warm up to above normal levels on Thursday as low pressure approaches from the west and drags a cold front towards the region.
Rain develops Thursday night and continues through Friday morning with the passage of this cold front. Rainfall will mostly be on the order of 1/4 to 1/2 inch.
Temperatures begin to drop off on Friday as cold air advection develops behind the passage of the cold front. Highs will only be in the 40s on Saturday before warming back up closer to normal on Sunday. Dry this weekend as Canadian high pressure builds back into the region.
AVIATION /12Z TUESDAY THROUGH SATURDAY/
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY and surrounding areas.
Today...VFR. Northwest winds 5-10 kt through much of the morning, becoming southwesterly at most terminals after 17-19Z 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, with calm periods possible. High confidence.
Outlook...
Wednesday through Thursday...VFR. NSW.
Thursday night into Friday...Sub-VFR likely in RA and low CIGs. Improving conds Friday afternoon.
Saturday...VFR. NSW.
MARINE
The Small Craft Advisory has been extended until 9 AM for all NJ and DE Atlantic Coastal Waters as well as the lower Delaware Bay. Northwest winds generally 10-15 kt with gusts near 25 kt and gradually decreasing. Winds later today will shift to a more southerly direction at around 10 kt, continuing through tonight. Seas 3-5 feet initially, decreasing to 2-4 feet for much of today, and to 1-3 feet for tonight.
Outlook...
Wednesday...Sub-SCA conditions.
Thursday through Friday...SCA conditions develop Thursday afternoon and continue through Friday morning. VSBY restrictions in rain and fog Thursday night through Friday morning.
Friday night through Sunday...Sub-SCA conditions with fair weather.
PHI WATCHES/WARNINGS/ADVISORIES
PA...None. NJ...None. DE...None. MD...None. MARINE...Small Craft Advisory until 9 AM EDT this morning for ANZ431- 450>455.
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