Area Forecast Discussion
Issued by NWS Mt. Holly, NJ

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000 FXUS61 KPHI 171015 AFDPHI Area Forecast Discussion National Weather Service Mount Holly NJ 615 AM EDT Tue Oct 17 2017 .SYNOPSIS... High pressure over the Midwest will build east and will move off the Mid-Atlantic coast later this week. A cold front gradually approaches early next week. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... High pressure builds across the area today, providing quiet weather across the region as mostly sunny skies prevail. Winds will shift from the north this morning, to west through the day as the center of the high shifts slightly southward. Highs will be close to or slightly below normal across the area. && .SHORT TERM /6 PM THIS EVENING THROUGH 6 AM WEDNESDAY/... High pressure remains in control of the weather tonight across the region. Skies remain mostly clear and winds will become light and variable or calm for most places. This will allow for temperatures to cool once again to near or slightly below normal for most places. We maintain the Frost Advisory for portions of the Pine Barrens of southern New Jersey as temperatures there may cool enough for some areas of frost to develop. Portions of northern New Jersey and northeast Pennsylvania may stay just warm enough for only patchy frost to develop in the isolated coolest spots. && .LONG TERM /WEDNESDAY THROUGH MONDAY/... A prolonged period of dry weather is on tap for long term as high pressure builds east and remains in control of the weather. Temperatures will gradually warm up, and will end up being above normal for the end of the week and into the weekend. High pressure will be centered south of the Delmarva Peninsula on Wednesday. Return flow sets up behind the high, allowing high temperatures to warm up by about 10 degrees compared to Tuesday, and highs will be in the upper 60s to low 70s. The high moves offshore on Thursday, and then another area of high pressure will become entrenched over the Mid-Atlantic and Southeast U.S. for the weekend. Highs will gradually rise into the low to mid 70s, and overnight lows will be in the 40s to low 50s. High pressure moves offshore on Monday. A cold front approaches late in the day. && .AVIATION /10Z TUESDAY THROUGH SATURDAY/... The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY and surrounding areas. VFR conditions will prevail today and tonight. Winds will shift from northerly this morning, to west-southwest this afternoon into this evening, before becoming light and variable or calm this evening and overnight. OUTLOOK... Wednesday through Saturday...VFR. && .MARINE...
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We extended the Small Craft Advisory through 11 am this morning as winds remain around 25 to 30 knots and seas are around 4-6 feet in some areas. As high pressure continues to build across the area, winds will lighten and seas will subside and the advisory will be able to be come down later this morning. Conditions the rest of today and tonight will remain below advisory levels. OUTLOOK... Wednesday through Saturday...Sub-SCA conditions expected on the waters through this time.
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PA...Frost Advisory until 9 AM EDT this morning for PAZ054-055- 060>062-101-103-105. NJ...Frost Advisory until 9 AM EDT this morning for NJZ001-007>010. Frost Advisory from 1 AM to 9 AM EDT Wednesday for NJZ021-022- 027. DE...None. MD...None. MARINE...Small Craft Advisory until 11 AM EDT this morning for ANZ431- 450>455.
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