Cape Henlopen to Fenwick Island DE out 20 nm Marine Forecast
| Today...Nw Winds 10 To 15 Kt. Seas 2 To 3 Ft. Wave Detail: Nw 3 Ft At 4 Seconds And Se 2 Ft At 7 Seconds. |
| Tonight...Sw Winds 10 To 15 Kt. Seas 2 To 3 Ft. Wave Detail: Sw 3 Ft At 4 Seconds And Se 3 Ft At 7 Seconds. |
| Fri...Sw Winds 10 To 15 Kt. Seas 2 To 3 Ft. Wave Detail: S 3 Ft At 6 Seconds And Nw 1 Foot At 4 Seconds. |
| Fri Night...Sw Winds 15 To 20 Kt With Gusts Up To 25 Kt. Seas 3 To 5 Ft. Wave Detail: S 4 Ft At 7 Seconds. |
| Sat...Sw Winds 15 To 20 Kt. Seas 3 To 5 Ft. Wave Detail: S 4 Ft At 7 Seconds. |
| Sat Night...Sw Winds 10 To 15 Kt With Gusts Up To 20 Kt. Seas 3 To 4 Ft. Wave Detail: S 4 Ft At 7 Seconds. |
| Sun...S Winds 10 To 15 Kt. Seas 3 To 4 Ft. |
| Sun Night...S Winds 15 To 20 Kt. Seas 3 To 5 Ft. A Chance Of Showers. |
| Mon...S Winds 15 To 20 Kt. Seas 4 To 5 Ft. A Chance Of Showers In The Morning, Then Showers Likely In The Afternoon. |
| Mon Night...Sw Winds 15 To 20 Kt, Becoming Nw After Midnight. Seas 4 To 5 Ft. Showers Likely. |
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Area Forecast Discussion National Weather Service Mount Holly NJ 647am EDT Thu Mar 27 2025 Synopsis High pressure will be located to our south today before shifting offshore and remaining in the vicinity of Bermuda through the weekend. A warm front will lift north across the area on Friday night resulting in a very mild weekend. The front will sag back south on Saturday night before lifting back north of the area on Sunday. A low pressure system will approach the region on Monday with a cold frontal passage on Monday night. High pressure will then return for Tuesday and Wednesday. Near Term - Through Tonight Forecast running on track, so no significant changes will be made to the forecast this morning. The combination of clear skies and light winds have resulted in temperatures generally in the mid and upper 20s, and in the low 30s along the I-95 corridor. High pressure over the Ohio and Tennessee Valley will build east and will be over the Carolina coast by this afternoon before sliding offshore tonight. A mid-level trough with strong shortwave energy will pass north of the region tonight. Sunny skies on tap today with near normal temperatures. Highs will top off in the mid to upper 50s, though cooler in the southern Poconos, especially the higher elevations, and along the coasts. As the high passes south of Delmarva, the pressure gradient will tighten between that high and low pressure over eastern Canada. West to northwest winds will increase to 10 to 20 mph with gusts up to 25 mph. Winds diminish fairly quickly this evening as pressure gradient relaxes and with loss of diurnal heating. Light south winds on tap for tonight. A mid-level trough with strong shortwave energy passes north of the region tonight, and although it will remain quite dry, there may be some isolated rain and/or snow showers across the southern Poconos and far northwest New Jersey. Quantitative Precipitation Forecast will be minimal. Partly to mostly cloudy skies otherwise. Lows will be in the upper 30s to around 40. Short Term - Friday Through Sunday The short term period will feature an early-summer like weather pattern as a very warm airmass develops over the area. The upper trough that has been over the Northeast US the last couple days pulls away on Friday. Flow aloft will become zonal through Saturday as an upper trough moves into the Central US allowing the ridge to amplify over the eastern US on Sunday. At the surface, high pressure will be located over the western Atlantic in the vicinity of Bermuda through the weekend. A warm front will lift north of the area on Friday night allowing the entire area to be in the warm sector on Saturday. The front will sag back south on Saturday night across portions of the area, but this appears to be short-lived as the front lifts clear of the area again on Sunday. So what does this mean? Well, Friday will feature more clouds than sun as the warm front approaches the area. High temperatures will mainly be in the low to mid 60s, with 50s up in the higher elevations of the Poconos and northern New Jersey and along the coast. For Friday night, some energy aloft will be accompanied with the passing warm front. As forcing for ascent increases, should see a band of showers develop, so have kept 20-50% Probability of Precipitation across the area. Quantitative Precipitation Forecast will be minimal however, perhaps a few hundredths of an inch at most. Lows will be mild ranging from the mid 40s to mid 50s. For Saturday, the region will be located in the warm sector, so expecting a very mild start to the weekend. Despite some clouds around, strong south-southwesterly flow will allow afternoon highs to soar well into the 70s, and perhaps surpassing the 80 degree mark in some spots with 60s in the Poconos and along the coast. Should fall well short of any records, but this does look to be our warmest day of the season thus far. Latest guidance suggests that the front will sag back south on Saturday night across northern portions of the area. This will result in another chance for showers especially north of Philly with temperatures remaining mild in the upper 40s to upper 50s. The front should gradually make its way back north again on Sunday. So while temperatures are not expected to be quite as warm compared to Saturday thanks to more cloud cover and showers around, still expecting highs in the 60s and 70s. Long Term - Sunday Night Through Wednesday Upper trough will begin to approach the region on Sunday night as surface low pressure tracks across the southern Great Lakes and into southern Quebec on Monday. A cold front will trail back to the west and cross through the area late in the day on Monday into Monday night. Showers and isolated thunderstorms will be accompanied with the front as it tracks through, but it is quite too early for any specifics. Depending on the amount of destabilization that occurs ahead of the front in combination with modest flow aloft, this may support a few strong to severe storms to occur with the front. This is supported by the CSU-MLP guidance and by the Storm Prediction Center which has portions of the region in the Severe Weather Outlook on Monday. Behind the frontal passage, we'll start to see some improvement as Canadian high pressure returns for Tuesday and Wednesday. Another disturbance will approach from the west late in the day on Wednesday, but current guidance suggests that any precipitation should hold off until at least Wednesday night. In terms of temperatures, another warm day is expected on Monday with temperatures roughly 15-20 degrees above normal. Once the front passes through, we'll see temperatures return to more seasonable levels for Tuesday and Wednesday. Marine High pressure will be in control. Sub-Small Craft Advisory conditions on tap for today and tonight. NW winds 10 to 15 kt with gusts up to 20 kt today will become SW 5 to 10 kt tonight. Seas 2 to 3 feet. Outlook... Friday...No marine headlines expected. Friday night through Saturday...SCA (Small Craft Advisory) conditions possible on the Atlantic coastal waters due to seas around 4-6 feet. Saturday night through Sunday...Lingering SCA (Small Craft Advisory) conditions possible early, but overall no marine headlines expected. Sunday night through Monday...SCA (Small Craft Advisory) conditions probable on the Atlantic coastal waters due to wind gusts near 25 kt and seas around 4-6 feet. Fire Weather Minimum RH values today will be around 20 percent across New Jersey and from 20 to 25 percent across southeast Pennsylvania, the eastern shores of Maryland, and Delaware. This will be combined with west to northwest winds 10 to 20 mph with gusts up to 25 mph and the continued drying of the fine fuels. A Special Weather Statement has been issued to cover the elevated risk for wildfire spread. Beyond Thursday, fire weather concerns diminish. Humidity will rise with minimum RHs over 35 percent Friday and Saturday, going even higher Sunday and Monday. A wetting rain is also possible Sunday night and Monday. NOAA Mount Holly NJ Office: Watches - Warnings - Advisories PA...None. NJ...None. DE...None. MD...None. Marine None. |
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