Manasquan Inlet to Little Egg Inlet NJ out 20 NM Marine Forecast
| Today...S Winds 5 To 10 Kt. Seas Around 2 Ft. Wave Detail: E 2 Ft At 7 Seconds And S 1 Foot At 4 Seconds. Showers And Tstms Likely Early This Morning, Then A Chance Of Showers And Tstms Late This Morning. A Slight Chance Of Showers And Tstms This Afternoon. |
| Tonight...Sw Winds 5 To 10 Kt. Seas Around 2 Ft. Wave Detail: Se 2 Ft At 6 Seconds. |
| Wed...Sw Winds 5 To 10 Kt, Becoming S 10 To 15 Kt With Gusts Up To 20 Kt In The Afternoon. Seas 2 To 3 Ft. Wave Detail: S 3 Ft At 5 Seconds And E 1 Foot At 8 Seconds. A Chance Of Showers And Tstms In The Afternoon. |
| Wed Night...Sw Winds 10 To 15 Kt With Gusts Up To 20 Kt. Seas 2 To 3 Ft. Wave Detail: S 3 Ft At 5 Seconds And E 1 Foot At 9 Seconds. A Chance Of Showers And Tstms. |
| Thu...Sw Winds 10 To 15 Kt With Gusts Up To 20 Kt. Seas 3 To 4 Ft. Wave Detail: S 4 Ft At 6 Seconds. A Chance Of Showers And Tstms. |
| Thu Night...Sw Winds 10 To 15 Kt. Seas 3 To 4 Ft. Wave Detail: S 4 Ft At 7 Seconds. A Chance Of Showers And Tstms In The Evening. |
| Fri...W Winds 5 To 10 Kt. Seas Around 3 Ft. A Chance Of Showers And Tstms In The Afternoon. |
| Fri Night...Nw Winds 5 To 10 Kt. Seas 2 To 3 Ft. A Chance Of Showers And Tstms In The Evening. |
| Sat...Ne Winds Around 10 Kt, Becoming E In The Afternoon. Seas 2 To 3 Ft. |
| Sat Night...S Winds 5 To 10 Kt. Seas 2 To 3 Ft. Winds And Seas Higher In And Near Tstms. |
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Area Forecast Discussion National Weather Service Mount Holly NJ 618am EDT Tuesday July 15 2025 Synopsis A very warm and humid airmass will be over the region this week with multiple rounds of showers and thunderstorms expected. A cold front will stall within the vicinity of the area through Wednesday before lifting back northward as a warm front on Thursday. A cold front passes through the region on Friday with high pressure building in on Saturday. Another cold front then approaches early next week. Near Term - Through Tonight Showers and thunderstorms early this morning have primarily moved off the coast with exception of the immediate Delaware coast. Residual showers may continue for the next several hours before diminishing. Otherwise, just some low clouds, mist and some occasional patchy fog reside elsewhere. The main story today will be with the slowly advancing cold front that is tracking across the area. Guidance yesterday suggested that the front would make it south of the area, however guidance this morning suggests otherwise. It now appears that the front will stall out the area today. For areas south and east of the front today, it is expected that another round of potentially heavy rain is possible. However, the main upper level dynamics will be displaced further east so any heavy precipitation will be mainly focused along any residual outflow or sea breeze boundaries. WPC has outlooked most of our Delmarva counties in a SLIGHT risk today for excessive rainfall. Have considered a Flood Watch in these areas, but overall nature of convection seems to be sporadic and isolated in nature. Further north, the remainder of the area lies in a MARGINAL risk for excessive rainfall. Highs today will primarily be in the mid to upper 80s under partly cloudy skies where heat indicies are expected to top out in the low to mid 90s. Any convection that does develop today, should begin to wane and diminish around sunset with the loss of diurnal heating. Perhaps a few showers can linger into the overnight hours, but primary threat will come to a close. Skies should be mostly clear early, but an increase in clouds is expected overnight as another round of low stratus may develop after midnight. Another warm night is expected, with lows mainly in the 70s; upper 60s in the Poconos. Short Term - Wednesday Through Thursday Night Unsettled weather along with very warm and humid conditions will continue through Thursday. Several rounds of showers and thunderstorms can be expected, with locally heavy rainfall leading to flash flooding being the primary threat. On Thursday, there is also a concern for extreme heat. The stalled frontal boundary will begin to lift north on Wednesday, but its exact placement remains uncertain at the moment. The shortwave ridge will still be overhead on Wednesday, and this could act to introduce some dry mid level air into the equation. Synoptic forcing will not be strong, and shear will again be weak. At least scattered to numerous showers and thunderstorms should develop again into the afternoon and evening due to the diurnal instability and lack of any significant subsidence or CIN. Probability of Precipitation remain around 50-80% for our inland areas, greatest northwest of I-95. No severe probabilities are currently included from SPC, but there could be an isolated damaging wind gust from any stronger thunderstorms that develop. PWATs (Precipitable Waters) will again by high around 2" or so, so the tropical downpours and locally heavy rainfall will remain the primary hazard. The latest excessive rainfall outlook from WPC includes a Slight Risk (2/4) for portions of eastern PA and northern NJ, mainly along and north of the I-78 corridor. On Thursday, southwesterly flow will bring back warm air and moisture advection resulting in heat index values approaching 100 degrees in many areas. This is anticipated to be the warmest day of the week (unless the cold front on Friday is later than currently expected). A Heat Advisory will need to be considered for Thursday across portions of the area in a future update. There will again be chances of diurnally driven showers and thunderstorms on Thursday, again focused mainly northwest of I-95. Synoptic forcing is again not very strong, and deep layer shear will be weak. A lot of uncertainty regarding the convective environment for Thursday, and we currently have no threats outlooks by WPC or SPC. Probability of Precipitation are mostly 30-60%. Thursday night will be the warmest night of the week, with low temperatures mainly in the mid to upper 70s. Long Term - Friday Through Monday Friday could be another hot day depending on the timing of the next cold front. Latest guidance shows the front crossing through the region late in the day, and into the overnight hours on Friday. If that timing holds, most of the area (aside from Delmarva) may be a degree or two lower on Friday as compared to Thursday. This front may also act as a focusing mechanism for thunderstorms and associated convective hazards, but as with Thursday, uncertainty is high regarding any of these threats. PoPs are near 40-60% for much of the area. Heading into the weekend, Saturday should experience the lowest chance of convection with a surge of slightly drier air, lower instability, and some subsidence from the departing trough. Temperatures returning back closer to normal, and a comparatively nice Saturday looks to be shaping up with highs in the mid 80s and lower humidity compared to this week. Chances for convection should increase again some for Sunday as the boundary start lifting north with return flow. Marine No marine headlines are in effect through tonight. South- southwest winds around 5-10 kt this morning, increase to 10-15 kt this afternoon into tonight. Seas around 2 feet. Scattered showers and thunderstorms possible through tonight, which may cause locally gusty winds in excess of 34 kt. Outlook... Wednesday through Saturday...Winds and seas should stay below Small Craft Advisory criteria through this period. Showers and thunderstorms are possible daily, primarily in the late afternoon and evening hours. Rip Currents... For today, southerly winds around 5-10 mph with breaking waves around 1-2 feet, and an easterly swell at 6-7 seconds in length. As a result, have maintained a LOW risk for the development of dangerous rip currents at all beaches. For Wednesday, south-southwesterly winds increase to around 10-15 mph with breaking waves around 1-3 feet, and an easterly swell at 8-9 seconds in length. As a result, have upgraded Cape May and Atlantic Counties to MODERATE, and maintained a LOW risk for the development of dangerous rip currents for Monmouth, Ocean and Delaware Beaches. Rip currents occur often in the vicinities of jetties and piers and the speed of the currents are generally maximized at low tides. 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 None. |
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