Marine Weather Net

Delaware Bay north of East Point NJ to Slaughter Beach DE Marine Forecast


TONIGHT

NW
WINDS
10 - 15
KNOTS

TUE

W
WINDS
5 - 10
KNOTS

TUE NIGHT

S
WINDS
10 - 15
KNOTS

WED

SW
WINDS
10 - 15
KNOTS

The Marine Weather Forecast In Detail:
ANZ430 Forecast Issued: 402 PM EDT Mon Jun 24 2024

SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING
Tonight...Nw Winds 10 To 15 Kt With Gusts Up To 30 Kt, Diminishing To 5 To 10 Kt With Gusts Up To 20 Kt Late This Evening And Overnight. Seas 1 To 2 Ft. Wave Detail: Nw 2 Ft At 3 Seconds.
Tue...W Winds 5 To 10 Kt, Becoming S In The Afternoon. Seas 1 Foot Or Less. Wave Detail: Nw 1 Foot At 2 Seconds.
Tue Night...S Winds 10 To 15 Kt. Seas 1 To 2 Ft. Wave Detail: S 1 Foot At 3 Seconds.
Wed...Sw Winds 10 To 15 Kt. Seas Around 2 Ft. Wave Detail: S 1 Foot At 3 Seconds.
Wed Night...Sw Winds 5 To 10 Kt. Seas Around 2 Ft In The Evening, Then 1 Foot Or Less. Wave Detail: S 1 Foot At 3 Seconds, Becoming S 1 Foot At 5 Seconds. Showers And Tstms Likely In The Evening, Then Showers Likely With A Chance Of Tstms After Midnight.
Thu...Nw Winds 5 To 10 Kt. Seas 1 Foot Or Less. Wave Detail: W 1 Foot At 2 Seconds And Se 1 Foot At 6 Seconds. Showers Likely With A Chance Of Tstms In The Morning.
Thu Night...Nw Winds 5 To 10 Kt, Becoming N After Midnight. Seas 1 Foot Or Less.
Fri...Ne Winds 5 To 10 Kt, Becoming E In The Afternoon. Seas 1 Foot Or Less.
Fri Night...Se Winds 10 To 15 Kt, Diminishing To 5 To 10 Kt After Midnight. Seas 1 Foot Or Less.
Sat...S Winds 10 To 15 Kt. Seas 1 Foot Or Less, Then 1 To 2 Ft In The Afternoon.
Sat Night...S Winds 10 To 15 Kt. Seas 1 To 2 Ft. A Chance Of Showers And Tstms After Midnight. Winds And Seas Higher In And Near Tstms.
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Area Forecast Discussion
National Weather Service Mount Holly NJ
244pm EDT Monday Jun 24 2024

Synopsis
The cold front will continue to make its way offshore this evening as high pressure remains in control through Tuesday night. A warm front will lift north of the area early on Wednesday before another strong cold front passes by late Wednesday night. High pressure returns for Thursday and continues into Saturday ahead of another low pressure system that approaches on Sunday. High pressure returns by early next week.

Near Term - Through Tuesday
A much more comfortable airmass in place across the northern Middle Atlantic region to start the week. High pressure across Michigan is sending cooler and drier air across the area from the NW. The high will slip south of the area Tuesday and cause the fair weather to continue.

Skies will be mostly clear overnight and lows will be rather cool compared to recent nights. Lows will drop into the mid/upper 50s across the far NW areas and be in the 60 to 65 degree range for south NJ, Delmarva and metro Philadelphia. Winds will diminish after sunset.

On Tuesday, a sunny day expected with perhaps some late day Ci/Cs clouds arriving. Under these sunny skies, high temperatures will climb into the mid/upper 80s for the North and upper 80s/low 90s for metro Philly and adjacent areas. The dew points tomorrow will remain low (50s), so despite the temperatures, it will not feel that uncomfortable.

Short Term - Tuesday Night Through Thursday
Surface high pressure moves offshore Tuesday night as a warm front passes north of the area early Wednesday morning. As a result, these features will allow warm air advection to commence with surface flow becoming southwesterly ushering in a more humid airmass. Skies will remain partly cloudy as low temps only bottom out in the mid 60s to low 70s.

The moist and humid airmass will continue on Wednesday as surface dew points rise into the upper 60s to low 70s around the region. With modest SW flow continuing under mostly sunny skies through the early afternoon, the current forecast is for highs to reach into the low to mid 90s across inland locations. Closer to the coast and up in the Poconos, temps should remain in the 80s. Max heat indicies at this time look to approach 95-100 degrees mainly confined to the urban corridor. Heat headlines likely will be warranted during the day on Wednesday, but we'll continue to monitor this potential.

On the other hand, we'll also need to monitor the potential for severe weather Wednesday afternoon and evening. An upper trough will swing through the Great Lakes on Wednesday approaching our area by Wednesday night with an advancing cold front. With the abundance of moist, humid air in place, several indicators are present for thunderstorm development. Forecast soundings show SBCAPE values around 1500-2000 J/kg, bulk shear values around 30 kt, and lapse rates around 7.0-7.5C/km. Shear values are also a bit modest since forcing will be in somewhat close proximity. As a result, the Storm Prediction Center has outlined NE PA and N NJ in a SLIGHT Risk (Level 2/5) for severe weather with the remainder of the area in a MARGINAL Risk (Level 1/5). The main threat should be damaging wind gusts considering the environment. In terms of flooding, PWATs (Precipitable Waters) will be up around 2 inches, so any storm will be capable of producing heavy rainfall. Storm motion does appear to be relatively-fast, so not expecting any significant flood impacts at this time. In terms of timing, short-range guidance suggests this will be a late afternoon into the evening hours event before the cold front moves offshore on Thursday.

Some showers may linger near the coast on Thursday morning, but the overall trend will be for decreasing clouds and lowering dew points on Thursday as high pressure builds in from the west. It will feel much more comfortable outside compared to Wednesday with highs returning closer to normal.

Long Term - Thursday Night Through Monday
The long term as a whole looks fairly tranquil aside for a low pressure system that approaches for the latter half of the weekend.

Broad high pressure over the Midwest on Thursday will shift to our north on Friday before moving off the coast of New England on Saturday. This will result in a dry stretch of weather with mostly clear skies. Another low pressure system is on pace to impact the area Saturday night into Sunday which may bring another round of showers and thunderstorms with another frontal passage. Too far in advance to evaluate if any severe weather is possible. In its wake, high pressure returns to the area into early next week.

Temps through the long term period should remain quite seasonable to possibly a few degrees above normal for the end of June.

Marine
We'll continue with the SCA (Small Craft Advisory) flags for the evening (Delaware Bay) and ocean waters (early overnight) with the W to NW winds continuing. Gusts between 25 and 30 kts expected before decreasing overnight. Winds and seas have been slow to increase across the DE waters and parts of lower De Bay, but still think that there is an opportunity of some gusts into the early evening. Seas will be choppy for Delaware Bay and 4 to 6 ft for the ocean waters. Fair tonight and Tuesday. Lighter W winds expected for Tuesday.

Outlook... Tuesday night through Wednesday...SCA (Small Craft Advisory) conditions possible. Southerly winds around 15-20 kt with gusts up to 25 kt. Seas around 4-5 feet.

Wednesday night through Saturday...No marine headlines expected. A chance of thunderstorms on Wednesday night, otherwise generally fair weather anticipated.

Rip Currents... Monday...West-northwest winds around 10-15 mph with gusts up to 20 mph and breaking waves around 2 to 3 feet. Although wind direction will be directed offshore, wave periods are expected to increase to around 7 to 8 seconds. For this reason, have maintained a MODERATE Risk for the development of dangerous rip currents for both NJ/DE beaches.

Tuesday...Northwest winds will back to southerly as the day goes on around 10 mph. Breaking waves around 1 to 2 feet. With winds mainly directed offshore or parallel to the coast and much lower wave heights, have opted to go with a LOW Risk of rip currents for all beaches.

For specific beach forecasts, visit weather.gov/beach/phi

NOAA Mount Holly NJ Office: Watches - Warnings - Advisories
PA...None. NJ...None. DE...None. MD...None.

Marine
Small Craft Advisory until 8pm EDT this evening for ANZ430- 431. Small Craft Advisory until 2am EDT Tuesday for ANZ450>452. Small Craft Advisory until 11pm EDT this evening for ANZ453>455.