Area Forecast Discussion
Issued by NWS Mt. Holly, NJ

Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
-- Remove Highlighting --
-- Discussion containing changed information from previous version are highlighted. --
000 FXUS61 KPHI 062031 AFDPHI Area Forecast Discussion National Weather Service Mount Holly NJ 331 PM EST Wed Dec 6 2017 .SYNOPSIS...
-- Changed Discussion --
A front that crossed the area lat night will remain well offshore through the weekend. A ridge of high pressure will extend over the area tonight through Friday. An area of low pressure will move along the offshore front Friday night and Saturday. A cold front will cross the area Sunday. Another low pressure system and front will affect our area later Monday and into Tuesday.
-- End Changed Discussion --
&& .NEAR TERM /UNTIL 6 AM THURSDAY MORNING/...
-- Changed Discussion --
Dry weather is expected tonight as high pressure at the surface is slightly affecting our area from the west. However, with the cold front off the coast, and a couple of short wave/vorticity impulses expected overnight, there will be some cloudiness, especially across southern New Jersey and central/southern Delaware and Maryland. There will be some light wind, generally out of the west to southwest around 5 to 10 mph. Overnight lows are expected to be close to or a few degrees above normal.
-- End Changed Discussion --
&& .SHORT TERM /6 AM THURSDAY MORNING THROUGH 6 PM THURSDAY/...
-- Changed Discussion --
Dry weather continues on Thursday high pressure at the surface continues to ridge into the area from the west. The main cloud cover through most of the day will be across southern New Jersey and central/southern Delaware and Maryland as there will remain some clouds associated with the front located offshore and a couple of short waves/vorticity impulses moving across the area. Additional cloud cover may begin to move into the area late in the day from the southwest as well.
-- End Changed Discussion --
&& .LONG TERM /THURSDAY NIGHT THROUGH WEDNESDAY/...
-- Changed Discussion --
Thursday night...A ridge of high pressure will remain in place over the area. Fair weather along with seasonably cold temperatures expected. Lows in the low/mid 20s in most areas with close to 30 degrees in metro Philadelphia and over Delmarva. Friday through Saturday...A low pressure system will move along the offshore front. Moisture will be sent back inland in association with this. The various models are offering varying solutions with regards to how much QPF will be sent back across our area. Our fcst was based mostly with the GFS/12Z. The NAM and Canadian models are higher with QPF/snowfall across the area. Confid in snowfall amts is not the best. Placement of the snows across Srn DE and extreme SE NJ looks good. We`ll call it around an inch for now with smaller amts in towards inland DE and up into s/central NJ. Temperatures will be below normal with low 40s for highs Sat and lows in the upper 20s/low 30s in most areas. Sat night and Sunday...Below normal temperatures expected along with scattered snow showers. A cold front along with an upper trough cross the area. Sunday night thru Monday...Fair and cool weather expected. Monday night thru Wednesday...Another low pressure system and associated front will be across the region. Temperatures will be mostly below normal. with readings by Wednesday much below normal. Much of the precipitation during this period could be snow.
-- End Changed Discussion --
&& .AVIATION /20Z WEDNESDAY THROUGH MONDAY/...
-- Changed Discussion --
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY and surrounding areas. Tonight...VFR. Winds becoming west to southwest 5 to 10 knots. High confidence. Thursday...VFR. west to southwest winds increasing to 10 to 15 knots, with gusts 15 to 20 knots by late morning and into the afternoon. High confidence. Outlook... Thu night thru Fri morning...VFR expected. Fri afternoon thru Sat afternoon...VFR N/W. Lower conditions S/E with low MVFR/IFR psbl. Snow/Rain near KMIV/KACY. Sat night thru Sunday...VFR. Sct snow showers. Monday...Mostly VFR.
-- End Changed Discussion --
&& .MARINE...
-- Changed Discussion --
Conditions on the southern half of our Atlantic Coastal Waters and Delaware bay are expected to remain below advisory levels tonight through Thursday. However, winds are expected to continue to periodically gust around 25 knots on the northern half of our Atlantic Coastal Waters through tonight. So we will keep the Small Craft Advisory up through 6 am for the northern waters. Outlook... Thu night thru Saturday...Sub-SCA conditions. A chance for rain and maybe snow Fri afternoon thru Saturday morning. Saturday night thru Monday night...SCA conditions most of the time. Few showers Sat night and Sunday.
-- End Changed Discussion --
&& .PHI WATCHES/WARNINGS/ADVISORIES... PA...None. NJ...None. DE...None. MD...None. MARINE...Small Craft Advisory until 6 AM EST Thursday for ANZ450-451. && $$ Synopsis...O`Hara Near Term...Robertson Short Term...Robertson Long Term...O`Hara Aviation...Robertson/O`Hara Marine...Robertson/O`Hara

USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.