Delaware Bay north of East Point NJ to Slaughter Beach DE Marine Forecast
| Tonight...Sw Winds 5 To 10 Kt, Becoming W 10 To 15 Kt After Midnight, Then Becoming Nw 20 To 25 Kt With Gusts Up To 30 Kt Late. Seas 1 Foot Or Less, Then 1 To 2 Ft After Midnight. Wave Detail: W 2 Ft At 2 Seconds. A Chance Of Light Snow. Vsby 1 To 3 Nm. |
| Sat...Nw Winds 30 To 35 Kt With Gusts Up To 50 Kt. Seas 3 To 5 Ft. Wave Detail: Nw 4 Ft At 4 Seconds. Freezing Spray. |
| Sat Night...Nw Winds 25 To 35 Kt. Seas 3 To 5 Ft. Wave Detail: Nw 5 Ft At 4 Seconds. Freezing Spray. |
| Sun...Nw Winds 20 To 25 Kt, Diminishing To 15 To 20 Kt In The Afternoon. Gusts Up To 35 Kt. Seas 2 To 4 Ft. Wave Detail: Nw 4 Ft At 4 Seconds. Freezing Spray. |
| Sun Night...Nw Winds 15 To 20 Kt, Diminishing To 10 To 15 Kt After Midnight. Seas 2 To 3 Ft, Subsiding To 1 To 2 Ft After Midnight. Wave Detail: Nw 2 Ft At 3 Seconds. |
| Mon...Nw Winds 5 To 10 Kt. Seas 1 To 2 Ft In The Morning, Then 1 Foot Or Less. Wave Detail: Nw 1 Foot At 2 Seconds. |
| Mon Night...Nw Winds Around 5 Kt. Seas 1 Foot Or Less. |
| Tue...Nw Winds Around 5 Kt. Seas 1 Foot Or Less. |
| Tue Night...Nw Winds Around 5 Kt, Becoming Se Around 5 Kt After Midnight. Seas 1 Foot Or Less. |
| Wed...Se Winds 5 To 10 Kt, Becoming Nw In The Afternoon. Seas 1 Foot Or Less. A Chance Of Rain. Vsby 1 To 3 Nm In The Afternoon. |
| Wed Night...Nw Winds 10 To 15 Kt. Seas 1 To 2 Ft. A Chance Of Rain And Snow. Vsby 1 To 3 Nm. |
| Area Forecast Discussion National Weather Service Mount Holly NJ 1236am EST Sat Feb 7 2026 .WHAT HAS CHANGED... No significant changes to the forecast regarding expected impacts from light snowfall tonight, high winds and extreme cold Saturday through Saturday night. Extreme Cold Warning valid time was changed to start early Saturday morning for all areas, and the end time was pushed back to noon Sunday for all areas. The High Wind Warning and Wind Advisory valid time was changed. Both wind headlines for all of our forecast area begin at 4 AM Saturday through midnight Saturday night. The Storm, Gale, and Heavy Freezing Spray Warnings valid times were changed. All marine wind hazards now begin at 4 AM Saturday. The Storm Warning ends at 4am Sunday, and the Gale Warning and Heavy Freezing Spray Warning end at 10am Sunday. .KEY MESSAGES... 1. A clipper system will bring a period of light snow to the region tonight, possibly ending with isolated heavier snow showers or snow squalls early Saturday morning. 2. Dangerously cold and windy conditions develop on Saturday and continue into Sunday morning as arctic high pressure builds into the region. 3. Temperatures begin to warm back towards normal early next week. Next opportunity for wintry precipitation comes with a mid-week system. KEY MESSAGE 1...A clipper system will bring a period of light snow to the region tonight, possibly ending with isolated heavier snow showers or snow squalls early Saturday morning. A robust clipper system will track through the Great Lakes today and quickly move across interior New York tonight. As a result, periods of light snow that have developed to our west will continue to overspread areas of eastern PA, and into the I-95 corridor through 8 PM, and near coastal areas around/after 8 PM. Quantitative Precipitation Forecast amounts have remained generally the same, except in the higher elevations of Carbon and Monroe Counties where Quantitative Precipitation Forecast has increased a bit. As a result, expecting snowfall totals around a coating to an inch for most locales. Isolated amounts up to 2 inches are possible in some spots, but would mainly be found across the higher elevations of northeast PA and northern NJ. No winter headlines are warranted as snowfall totals remain safely below advisory criteria. Accompanied with the clipper is a strong arctic cold front which is forecast to cross through the area between about 3-6 AM Saturday morning. There remains a low end threat for snow squalls, but overall the threat is not overly impressive. While both NAM/RAP guidance indicate there will be sufficient low level (0-2km) RH and strong forcing with the arctic front, lapse rates are quite poor. Hence, the threat for snow squalls shown in their respective SNSQ parameter output is low/non-existent. However, cannot completely rule out a couple isolated heavier snow showers or snow squalls as many of the high resolution window (HRW) models highlight the potential for squalls, directly along the immediate front itself as it pushes through during the predawn hours. KEY MESSAGE 2...Dangerously cold and windy conditions develop on Saturday and continue into Sunday morning as strong arctic high pressure builds into the region. Arctic front clears the region Saturday morning and strong cold air advection will be underway. 925mb-850mb temperatures drop to -18C to -25C throughout, and as a result, the max temperature for the calendar day will likely occur overnight, and then temperatures crash into the single digits and teens by Saturday morning. Meanwhile, as arctic high pressure builds into the Great Lakes and Ohio Valley, low pressure over the western Atlantic will intensify and deepen. This results in a very strong northwest pressure gradient over the Northeast and Mid-Atlantic. Winds increase to 20-35 mph with gusts up to 55 mph for most of the region and as high as 60 mph across Delmarva and the southern coast of New Jersey. The High Wind Warning and Wind Advisory remains in effect, with a slight adjustment in start and end times from the previous update. All wind hazards run from 4 AM Saturday to midnight Saturday night. The strong winds and very cold daytime temperatures will produce wind chills below zero during the daytime hours Saturday, ranging from around -5 to -15 degrees in most areas. Temperatures Saturday night will drop into the low to mid single digits by Sunday morning for most of the region and as low as -5 degrees in the southern Poconos and far northwest New Jersey. Wind chills will be as low as -20 degrees in the southern Poconos on Saturday and as low as -30 degrees Saturday night. Minimum wind chills are still forecast to range from -10 to -20 degrees elsewhere Saturday night. The Extreme Cold Warning remains in effect for the entire region beginning early Saturday morning through noon Sunday. High temperatures Sunday will range from the mid 10s to low 20s, but northwest winds remaining near 10-20 mph (gusting up to 30 mph) will will result in maximum daytime wind chills in the single digits Sunday afternoon. Lows Sunday night will be in the single digits, and wind chills will be below zero; as low as -10 degrees north and west of the Fall Line and as low as -15 degrees in the southern Poconos. A Cold Weather Advisory will likely be needed through Monday morning following the ending of the Extreme Cold Warning. A slow moderation of temperatures will occur as the new week progresses. KEY MESSAGE 3...Temperatures begin to warm back towards normal early next week. Next opportunity for wintry precipitation comes with a mid- week system. Heading into the new work week, a weak upper level ridge will begin building in over the area, finally drawing in some relatively warmer air. Temperatures from Tuesday onward for the week look to be near or just below normal, with highs mainly in the 30s to even low 40s in Delmarva, which will be quite welcome compared to what we have seen over the last two weeks. As we head towards the mid-week, another upper level trough begins to develop to our west. At the surface, a low looks to develop near the Great Lakes region and then track eastward. The passage of this low looks to bring another opportunity for wintry precipitation to most of the region. For Delmarva and southeastern New Jersey, the system currently looks to pass sufficiently far north to bring primarily rain to this area. For the rest of the region though, forecast soundings indicate that depending on when precipitation moves in, that enough cold air may linger near the surface to result in a wintry mix. Details remain uncertain this far out but overall, the system does not look to have a significant amount of moisture with it, likely resulting in fewer impacts if the precipitation falls as plain rain and/or snow. If there is more mixed precipitation, then this may change. We will continue to monitor this system over the coming days. Marine No marine headlines are currently in effect through most of tonight. West-southwest winds around 5-10 kts will gradually increase this evening to around 10-15 kts before abrupartly shifting to northwest to around 30-40 kts between 4am and 6 AM. Gusts will increase to 45-50 kts by dawn Saturday in wake of strong arctic cold front. Seas around 2-4 feet overnight. Periods of light snow likely reducing visibility at times overnight with areas of freezing spray developing late. Gale to Storm force winds will continue Saturday into Saturday night before gradually diminishing. Seas 5-9 feet. Moderate to heavy freezing spray is likely. Gale and Storm Warnings remain in effect from 4am Saturday through Saturday night. Heavy Freezing Spray Warning remains in effect from 4am through 10 AM Sunday. Some gale force wind gusts could linger into Sunday morning, then Small Craft Advisory conditions and light freezing spray expected. Regarding the river ice threat...Ice has formed across area bay waters and inland estuaries. This includes, but is not limited to the Delaware estuary. On rivers, the ice has grown in thickness enough to start causing restrictions in flow. An example of this can be seen at the Trenton River gauge. Per satellite imagery, the Delaware River is pretty much ice covered from just south of Trenton upstream to about Washington Crossing. The most common ways river ice can break up is either through a thermal or mechanical means. We would like to see temperatures rise into the 40s for a few days, but that's not expected within the next 7 days. Rainfall, producing river rises, can also break up ice. But again, that's not in the forecast either this coming week. As a result, we expect to continue to see ice expand before it contracts, especially with another deep freeze expected this weekend. For next week, there may be a pause in the growth during the daylight hours as temperatures warm above freezing, however temperatures at night will continue to support expansion. Outlook... Sunday night through Monday...SCA (Small Craft Advisory) conditions likely with seas lingering around 5 feet. Freezing spray likely Sunday night. Monday night through Wednesday...No marine headlines expected. NOAA Mount Holly NJ Office: Watches - Warnings - Advisories PA...Extreme Cold Warning from 6am this morning to noon EST Sunday for PAZ060>062-070-071-101>106. Wind Advisory from 4am early this morning to midnight EST tonight for PAZ054-055-060>062-070-071-101>106. Extreme Cold Warning from 4am early this morning to noon EST Sunday for PAZ054-055. NJ...High Wind Warning from 4am early this morning to midnight EST tonight for NJZ016-020>027. Extreme Cold Warning from 6am this morning to noon EST Sunday for NJZ001-007>010-012>027. Wind Advisory from 4am early this morning to midnight EST tonight for NJZ001-007>010-012>015-017>019. DE...High Wind Warning from 4am early this morning to midnight EST tonight for DEZ001>004. Extreme Cold Warning from 6am this morning to noon EST Sunday for DEZ001>004. MD...High Wind Warning from 4am early this morning to midnight EST tonight for MDZ012-015-019-020. Extreme Cold Warning from 6am this morning to noon EST Sunday for MDZ012-015-019-020. Marine Storm Warning from 4am early this morning to 4am EST Sunday for ANZ430-431-451>455. Heavy Freezing Spray Warning from 4am early this morning to 10am EST Sunday for ANZ430-431-450>455. Gale Warning from 4am early this morning to 10am EST Sunday for ANZ450. |
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