Area Forecast Discussion
Issued by NWS Mt. Holly, NJ

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000 FXUS61 KPHI 180704 AFDPHI Area Forecast Discussion National Weather Service Mount Holly NJ 304 AM EDT Wed Oct 18 2017 .SYNOPSIS...
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High pressure remains in control of the weather for much of the rest of the week into the weekend. A dry frontal boundary may move into the area Thursday into Friday. A couple of frontal boundaries are forecast to affect the area early next week, bringing a return of unsettled weather.
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&& .NEAR TERM /UNTIL 6 PM THIS EVENING/...
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Frost Advisory remains in effect for the Pine Barrens through this morning, and should burn off fairly quickly within a few hours after sunrise. High pressure continues to strengthen across the Mid-Atlantic area. Return flow develops this afternoon, and this will usher a milder airmass into the region. Highs today will be about 10 degrees warmer than Tuesday, topping off in the upper 60s to around 70.
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&& .SHORT TERM /6 PM THIS EVENING THROUGH 6 AM THURSDAY/...
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Clear tonight with diminishing winds. Dewpoints will slowly begin to creep up with light S to SW flow. Patchy ground fog is possible across the Delmarva, Pine Barrens of NJ, and parts of northern NJ. Radiational cooling will allow for lows in the upper 30s to around 40 in the Pine Barrens, and in the mid 40s most elsewhere. The Philly metro area will drop into the low 50s.
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&& .LONG TERM /THURSDAY THROUGH TUESDAY/...
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Quiet weather is expected for the remainder of this week into the weekend. High pressure will be in control of the weather through the end of the week before moving offshore Sunday. A frontal boundary may move across the area on Thursday, although it is expected to be dry and only have an effect on the wind direction and may slightly increase winds. Ridging aloft builds across the area late this week into the weekend, which will help keep temperatures several degrees above normal. As the surface high and ridge aloft moves offshore Sunday, return flow and southwest flow aloft develops. This will help increase clouds, but no precipitation is expected through Sunday. As we go into early next week, a couple of frontal boundaries are forecast to move across the east coast. This is expected to lead to an increase in rainfall activity Monday into Tuesday, then usher in cooler weather behind the fronts.
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&& .AVIATION /07Z WEDNESDAY THROUGH SUNDAY/...
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The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY and surrounding areas. VFR through Wednesday night. Light winds through daybreak, and then SW winds increase to 5-7 KT this afternoon. Winds diminish to 5 KT or less tonight. Patchy ground fog is possible with brief sub-VFR VSBY at KMIV/KACY late tonight through Thursday morning. OUTLOOK... Thursday-Sunday...VFR conditions expected. Winds may gust around 15 knots out of the southwest Thursday and out of the northwest Friday.
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&& .MARINE...
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High pressure dominates area waters. SW winds increase to 10-15 KT this afternoon, then diminish to 5-10 KT tonight. Ocean seas will be around 3 feet. OUTLOOK... Thursday-Sunday...Conditions expected to remain below Small Craft Advisory levels through the period.
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&& .PHI WATCHES/WARNINGS/ADVISORIES...
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PA...None. NJ...Frost Advisory until 9 AM EDT this morning for NJZ020>022-027. DE...None. MD...None. MARINE...None.
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&& $$ Synopsis...Robertson Near Term...MPS Short Term...MPS Long Term...Robertson Aviation...Robertson/MPS Marine...Robertson/MPS

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