Tonight:
Mostly clear, with a low around 51. West wind 0 to 5 mph.

Sunday:
Mostly sunny, with a high near 78. Northeast wind 0 to 5 mph.

Sunday Night:
Partly cloudy, with a low around 53. Southwest wind 0 to 5 mph.

Memorial Day:
A slight chance of rain showers after 2pm. Mostly sunny, with a high near 81. Northeast wind 0 to 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.

Monday Night:
A slight chance of rain showers. Partly cloudy, with a low around 53. East wind 10 to 15 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.

Tuesday:
A slight chance of rain showers before 2pm. Partly sunny, with a high near 75. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.

Tuesday Night:
Partly cloudy, with a low around 52.

Wednesday:
Mostly sunny, with a high near 81.

Extended Forecast

Wednesday Night Partly Cloudy	Thursday Mostly Sunny	Thursday Night Mostly Clear	Friday Sunny	Friday Night Partly Cloudy	Saturday Slight Chance Rain Showers
Lo 57 °F	Hi 89 °F	Lo 63 °F	Hi 91 °F	Lo 61 °F	Hi 86 °F

AREA FORECAST DISCUSSION
National Weather Service Mount Holly NJ
918 PM EDT Sat May 27 2023

Weather Synopsis:
High pressure over the Northeast states and Great Lakes region will weaken on Sunday and drift out to sea. Meanwhile, low pressure over the Southeast will move towards the Mid-Atlantic tonight through Sunday. This low will meander over the Mid-Atlantic before departing on Wednesday. High pressure then returns for the end of the week.

Near Term:
THROUGH SUNDAY - As of 9:15PM...High clouds spreading across the region as temperatures continue to drop. Conditions remain quiet and pleasant overall. Lows will drop into the upper 40s/low 50s for most spots tonight. A couple chillier temps (mid 40s) for the Pine Barrens or southern Poconos are possible. Winds will remain light.

Low pressure across the coastal Carolinas tonight and Sunday will continue to move slowly northward. Some thicker cloudiness will begin to overspread Delmarva and south NJ during the morning and attempt to move northward. The clouds will have difficulty morning into the deep, dry across our area. High temperatures will vary across the area with the warmest readings N/W of upper 70s/low 80s and cooler temps (low 70s) for Delmarva and coastal NJ. Winds will increase a bit for the southern areas as the pressure gradient tightens up. Winds will be 10 to 15 mph with gusts around 20 mph at times for the southern areas. Chances for any showers are rather low, but not zero, to the south. We have some slight chance pops for central/south DE and southern NJ.

Short Term:
SUNDAY NIGHT THROUGH TUESDAY - High pressure over the Northeast and Great Lakes weakens and slides offshore. However, a new area of high pressure will build over eastern Canada and spreads west through the Northeast and into the Great Lakes. This will act as a blocking high to the area of low pressure, both at the surface and aloft, that will continue to meander over the Mid-Atlantic into Tuesday.

Models continue to struggle to handle the placement of this low. 12Z/27 NAM brings the low farther north compared to the 12Z/27 GFS, and brings measurable precip north through much of New Jersey. 12Z RGEM and the 12Z ECWMF remain well south, similar to the GFS. Since the NAM seems like an outlier, will not bring PoPs and QPF too far north.

Overall, will carry likely PoPs for southern portions of Delmarva and chance PoPs north into the rest of Delmarva and southern New Jersey.

Depending on the placement of shortwave energy lifting from the south, there could even be some thunderstorms across Delmarva. Will cap thunder chances at slight chance to chance.

In terms of temperatures, onshore flow will keep temperatures cooler along the coasts due to the colder ocean temperatures. Highs on Monday will be in the upper 60s along the coast to the lower 70s about 10 to 20 miles inland. Farther inland, however, highs will be in the upper 70s to low 80s.

On Tuesday, as that low drifts father north, winds take on more of a northeast flow. This brings cooler air down into the region and highs will be some 10 degrees cooler compared to Monday.

Long Term:
TUESDAY NIGHT THROUGH SATURDAY - Low pressure will meander off the Mid-Atlantic coast Tuesday night through Wednesday before fizzling out and departing on Wednesday. Onshore flow will continue through the period, and temperatures will remain cool along the coast and warmer inland. There remains a chance for showers mainly across Delmarva and southeast New Jersey Tuesday night that will gradually taper off Wednesday and Wednesday night. Highs on Wednesday will be in the upper 70s to low 80s inland, and in the upper 60s to low 70s along the coasts.

From there, high pressure builds in from the west and will move off the Mid-Atlantic coast on Thursday before drifting offshore Friday. Return flow sets up and a warming trend will develop into the end of the week. Highs warm into the upper 80s and low 90s across much of the region both days, though Friday looks to be a couple of degrees warmer. Highs will be cooler in the 70s along the coasts.

A cold front passes through the region late Friday and Friday night. For now, there is a slight chance for showers with its passage. Slightly cooler temperatures look to spread into the region for Saturday.

Click for full NWS PHI Office Area Forecast Discussion