Overnight:
Mostly clear, with a low around 32. Northeast wind around 5 mph.
Wednesday:
A slight chance of rain showers after 5pm. Partly sunny, with a high near 55. East wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Wednesday Night:
A chance of rain showers before 11pm, then patchy fog and a slight chance of rain showers between midnight and 2am, then a chance of rain showers and patchy fog. Cloudy, with a low around 46. Southeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Thursday:
Rain showers likely and patchy fog before 2pm, then showers and thunderstorms likely. Cloudy, with a high near 76. South wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
Thursday Night:
Showers and thunderstorms. Cloudy, with a low around 56. West wind 0 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Friday:
Rain showers before 5pm. Cloudy, with a high near 66. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night:
Rain after 8pm. Cloudy, with a low around 48. Chance of precipitation is 80%.
Saturday:
Rain. Cloudy, with a high near 58. Chance of precipitation is 80%.
AREA FORECAST DISCUSSION
National Weather Service Mount Holly NJ
103 AM EDT Wed Apr 2 2025
Weather Synopsis:
High pressure will be in control through Wednesday. A warm
front will lift north across the area on Wednesday night as a
strong low tracks through Quebec on Thursday. The front will
return on Friday as it slowly drops south of the area by Friday
night. Several waves of low pressure will ride along this
boundary causing it to fluctuate north and south through the
weekend yielding unsettled weather. High pressure should return
by early next week.
Near Term:
THROUGH TODAY -
Forecast on track. Only minor tweaks made to the grids.
Tonight, high pressure shifts east, which will lead to surface
winds becoming more northeasterly. Winds should remain elevated
enough on the outer periphery of the high around 5- 10 mph, but
the usual sheltered spots will likely go calm and radiate well
under mostly clear skies. This is noteworthy because the
Frost/Freeze program begins April 1 for our Delmarva counties.
With the dry airmass in place and a cool northeast breeze, this
should limit/prevent any frost development despite the low temps
in the mid to upper 30s. Further north, lows will be in the
upper 20s to mid 30s, but the growing season is not active yet
in these locations to warrant any freeze headlines.
For Wednesday, the high will continue to exit and shift off the
coast of New England. Should see mostly clear skies early in
the day, becoming more cloud-filled in the afternoon. Winds will
become southeasterly due to the positioning of the high,
causing a more onshore component. It will also become breezy on
Wednesday with winds increasing to 10-20 mph with gusts locally
up to 30 mph. The onshore flow will help keep a lid on
temperatures across the north and east portions of the region,
with upper 40s to low 50s for areas north of I-78 as well as the
down the Jersey shore. Warmer temperatures in the mid to upper
50s will be around for the Philly metro, southeast Pennsylvania,
inland South Jersey, and the Delmarva. The next system will
begin to approach late afternoon into the early evening as a
warm front extending from a strong low over the Great Lakes.
This warm front may bring in some warm air and moisture
advection to the region late afternoon, resulting in some
showers across the Lehigh Valley and Poconos before sunset.
Short Term:
TONIGHT THROUGH FRIDAY -
Zonal flow aloft will persist through Wednesday night with
upper ridging building in for Thursday into Thursday night. At
the surface, departing high pressure will give way to a warm
front that lifts north across the area on Wednesday night before
stalling across New England on Thursday. Associated low
pressure tracks up through Quebec on Thursday as the "stalled"
boundary begins to slowly drop back south through the day on
Friday.
For Wednesday night, the warm front eastward from the strong
area of low pressure tracking into the Great Lakes will surge
northward across our area on Wednesday night. This will result
in a ramp up in warm air and moisture advection. Still
anticipate to see a few isolated to scattered showers associated
with the front, along with some patchy fog especially north of
the I-78 corridor. Overall any QPF should be light. Lows will be
in the upper 30s to upper 40s.
For Thursday and into Thursday night, the entire area will be
within the warm sector so expecting a mild day across the region
with highs in the upper 60s to upper 70s, with locales in the
Delmarva pushing 80 degrees despite mostly cloudy skies. Some
upper level energy will be around as well as the stalled
boundary across New England begins to drop back to the south
crossing back across our region on Thursday night. As it does
so, should see some showers and thunderstorms develop in the
late afternoon and evening hours. A few of these storms could
become severe as low level shear is quite high and some forecast
soundings depict a narrow corridor of instability available to
tap into. However, there remains a ton of variability amongst
guidance so the extent of the severe weather threat is
uncertain. This is lies with the general thinking by the Storm
Prediction Center which has the majority of our forecast area in
a MARGINAL Risk (Level 1/5) for severe weather on Thursday into
Thursday night. More details to come over the next few days.
For Friday, the boundary will be draped over the area in the
morning but should continue to drop south of the area through
the afternoon. Any shower activity should remained mostly
confined to the Delmarva region so have kept the mention of
showers and thunderstorms there, with drying conditions
filtering in elsewhere north of the boundary. Highs will vary
from the low 60s north to mid 70s south.
Long Term:
FRIDAY NIGHT THROUGH TUESDAY -
The boundary that pushed south of the area on Friday will
generally remain south of the area through Saturday. However,
several disturbances will be riding along this boundary which
will cause the boundary to fluctuate north and south through the
weekend. With this in mind, there will be several rounds of
showers around this weekend. The first round appears to occur
during the day on Saturday where temperatures will be in the
upper 40s to the north and mid 60s to the south. A second round
then looks to occur late Sunday into Sunday night as the
boundary lifts back north of the area where temps on Sunday will
be back in the 60s and 70s. Long story short, the weekend
period will present a period of relatively low predictability
but unsettled weather conditions. Should begin to see rapid
improvement by early next week as a cold front is on pace to
track across the region late Sunday night into Monday which will
shunt all precipitation east. High pressure will build back in
from the west and is expected to remain through Tuesday.
In terms of temperatures for next week, the pattern will
support a prolonged period of below normal temperatures. The
Climate Prediction Center projects a ~70% chance of below normal
temperatures for much of next week. This will present potential
for frost and freeze hazards across portions of the area, as
the Frost/Freeze program will begin on April 11th for areas
south of I- 78 into PA and NJ. It begins today (April 1st) for
Delmarva.
Click for full NWS PHI Office Area Forecast Discussion