Delaware Bay north of East Point NJ to Slaughter Beach DE Marine Forecast
| Today...Sw Winds Around 5 Kt, Becoming S 10 To 15 Kt With Gusts Up To 20 Kt Late This Morning, Then Increasing To 15 To 20 Kt With Gusts Up To 30 Kt Early This Afternoon, Increasing To 20 To 25 Kt With Gusts Up To 30 Kt Late. Seas 1 To 2 Ft, Building To 2 To 4 Ft This Afternoon. Wave Detail: S 1 Foot At 2 Seconds And Nw 1 Foot At 3 Seconds, Becoming S 3 Ft At 4 Seconds. |
| Tonight...S Winds 20 To 25 Kt, Becoming Sw After Midnight. Seas 2 To 4 Ft. Wave Detail: Sw 4 Ft At 4 Seconds. |
| Sat...W Winds 20 To 25 Kt, Diminishing To 15 To 20 Kt In The Afternoon. Seas Around 2 Ft. Wave Detail: W 2 Ft At 3 Seconds And Se 1 Foot At 6 Seconds. |
| Sat Night...Nw Winds 5 To 10 Kt With Gusts Up To 20 Kt, Becoming Ne After Midnight. Seas 1 To 2 Ft In The Evening, Then 1 Foot Or Less. Wave Detail: Nw 1 Foot At 3 Seconds, Becoming E 1 Foot At 2 Seconds. |
| Sun...E Winds 10 To 15 Kt, Becoming Se 15 To 20 Kt In The Afternoon. Seas 1 To 2 Ft, Building To 2 To 3 Ft In The Afternoon. Wave Detail: E 2 Ft At 3 Seconds, Becoming Se 3 Ft At 4 Seconds. |
| Sun Night...Se Winds 20 To 25 Kt, Increasing To 25 To 30 Kt After Midnight. Seas 3 To 5 Ft. Wave Detail: Se 5 Ft At 5 Seconds. A Chance Of Showers In The Evening, Then Showers After Midnight. |
| Mon...S Winds 20 To 25 Kt, Increasing To 25 To 30 Kt In The Afternoon. Seas 4 To 6 Ft. Showers. |
| Mon Night...S Winds 25 To 30 Kt, Becoming W 20 To 25 Kt After Midnight. Seas 3 To 5 Ft. Showers. |
| Tue...W Winds 20 To 25 Kt. Seas 2 To 3 Ft. A Chance Of Showers In The Morning. |
| Tue Night...W Winds 20 To 25 Kt, Becoming Nw 10 To 15 Kt After Midnight. Seas 2 To 3 Ft, Subsiding To 1 To 2 Ft After Midnight. |
| Area Forecast Discussion National Weather Service Mount Holly NJ 223am EDT Fri Mar 13 2026 .WHAT HAS CHANGED... No significant changes at this time. .KEY MESSAGES... 1. Gusty winds develop today as low pressure moves north of the region. 2. Breezy to windy Saturday along with dry conditions may create some fire weather concerns. 3. A strong cold front sweeps across our area later Monday with the potential for strong winds and strong to severe thunderstorms, followed by a much colder air mass Tuesday into Wednesday. KEY MESSAGE 1...Gusty winds develop today as low pressure moves north of the region. Low pressure across the upper Great Lakes will move east today and be near Lake Ontario tonight. The low will begin to slow fill after this morning. Still, a decent pressure gradient accompanying the low will bring a notable increase in winds this afternoon and early tonight. Overall, winds will remain below Wind Advisory criteria, but a couple gusts in that range can't be ruled out. A few rain/snow showers across the far NW areas and north NJ will accompany the low/front but nothing significant is foreseen. KEY MESSAGE 2...Breezy to windy Saturday along with dry conditions may create some fire weather concerns. Low pressure will depart northern New England early Saturday as it tracks into the Canadian Maritimes, while high pressure begins to build in from the Great Lakes area. The pressure gradient between these systems will result in a strong west to northwest flow across the Mid-Atlantic region Saturday. The air that arrives will also be much drier by Saturday afternoon to produce minimum relative humidity values in the 20-30 percent range. The dew points will lower into the low to mid 20s, however a period of deeper mixing may result in the dew points dropping into the teens across much of the area during afternoon peak heating. If this occurs, the relative humidity would be lower during peak heating. Since the winds will be gusting between 30-45 mph through about early/mid afternoon, this could create fire weather concerns. The main potential limiting factor will be fuel moisture and how dry it will be and become following the very recent times of rain/snow. KEY MESSAGE 3...A strong cold front sweeps across our area later Monday with the potential for strong winds and strong to severe thunderstorms, followed by a much colder air mass Tuesday into Wednesday. A strong upper-level trough is forecast to evolve out of the Plains and Midwest and into the Great Lakes to Lower Mississippi Valley from Sunday through late Monday. This will drive deepening surface low pressure up across the Great Lakes and then into adjacent Canada. A strong cold front will sweep across our area mostly Monday evening. Well ahead of the strengthening upper-level trough, low-level warm advection will increase across our region in conjunction with increasing flow and the arrival of a warm front. This southerly flow will also transport deeper moisture into our area ahead of the aforementioned strong cold front. The warm air advection plus a low- level jet will provide some lift and therefore some showers should tend to develop Sunday night into Monday before becoming widespread during Monday as forcing for ascent increases. Some elevated instability late Sunday night could result in a rumble of thunder. A much warmer air mass will overspread our area despite the showers breaking out on Monday, with high temperatures in the 60s across much of the area with even some lower 70s possible. It will also become more humid with dew points surging to around 60F ahead of the cold front Monday. The consenus of the model guidance shows some instability developing during Monday, and this will be within an environment with robust wind fields. As a result, strong shear will be present and model forecast soundings show veering winds in the lower levels. While thunderstorms will be possible, the overall instability may be limited due to cloud cover and ongoing showers. However, strong forcing for ascent arriving from the west can overcome the limited instability. Given the wind profiles that are forecast, a squall line could evolve ahead of or with the cold front or the storm mode could be some fast moving line segments. If the surface flow remains backed some, then storm rotation will be possible given the shear. As a result, there is a chance for some severe thunderstorms Monday afternoon and evening with locally damaging wind gusts the primary threat as of now. Areas of heavy rain will be probable given ample moisture (precipitable water values of 1+ inches) and plenty of forcing. As the strong cold front shifts offshore during Monday night, strong cold air advection develops. It is possible this colder air catches up to the lingering precipitation with some changeover to snow before ending, however the forcing may have a sharp back edge to it with the showers cutting off quickly with the frontal passage. There will also be a gusty wind ahead of the front out of the south which then shifts to west and northwest in the wake of the front. Peak wind gusts at this time from the gradient wind looks to be in the 30- 40 mph range. A much colder air mass settles in for Tuesday with temperatures struggling to reach 40 degrees in some areas. A gusty westerly wind will also add a chill factor with wind chill values down into the 20s and 30s during Tuesday. Still chilly on Wednesday however less wind is forecast. Marine West to Northwest winds 10 to 20 knots on the waters presently (3AM) will diminish thru dawn. After that they will shift to South and steadily increase thru the afternoon. Tonight then will turn West- Southwest. Speeds will be in the SCA (Small Craft Advisory) range after noon (or so) today and remain there overnight, The SCA (Small Craft Advisory) flag will continue with gusts to 30 kts expected. Fair weather expected. Outlook... Saturday...Small Craft Advisory conditions diminishing. Sunday and Monday...Small Craft Advisory conditions develop Sunday night, then Gale conditions probable on Monday. Some gusty thunderstorms possible Monday night. A strong wind field is forecast to be in place on Monday, however a warm air mass will be moving over the colder ocean waters and therefore how much mixes down to the surface is of lower confidence. Tuesday...Small Craft Advisory conditions probable NOAA Mount Holly NJ Office: Watches - Warnings - Advisories PA...None. NJ...None. DE...None. MD...None. Marine Small Craft Advisory from noon today to noon EDT Saturday for ANZ430-431. Small Craft Advisory from noon today to 6pm EDT Saturday for ANZ450>455. |
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