Sunday, April11, 2021
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Marine Weather and Tides
Swedesboro, NJ

Version 3.4
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1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:27AMSunset 7:37PM Sunday April 11, 2021 1:00 AM EDT (05:00 UTC) Moonrise 5:37AMMoonset 6:16PM Illumination 1% Phase: Waning Crescent; Moon at 29 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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ANZ430 Delaware Bay Waters North Of East Point Nj To Slaughter Beach De- 1129 Pm Edt Sat Apr 10 2021
Overnight..SE winds 5 to 10 kt. Waves 2 ft or less. A chance of showers. Showers likely late.
Sun..SE winds 5 to 10 kt. Waves 2 ft or less. Showers likely in the morning, then a chance of showers early in the afternoon. A chance of tstms late.
Sun night..SE winds 5 to 10 kt, becoming N after midnight. Waves 2 ft or less. A chance of tstms until early morning.
Mon..NE winds 5 to 10 kt. Waves 2 ft or less.
Mon night..NE winds 5 to 10 kt. Waves 2 ft or less.
Tue..NE winds 5 to 10 kt, becoming E in the afternoon. Waves 2 ft or less.
Tue night..SE winds 5 to 10 kt, becoming S after midnight. Waves 2 ft or less.
Wed..N winds 5 to 10 kt. Waves 2 ft or less.
Wed night..N winds 5 to 10 kt. Waves 2 ft or less.
Thu..N winds 5 to 10 kt. Waves 2 ft or less.
Thu night..NW winds around 5 kt. Waves 2 ft or less. Winds and waves higher in and near tstms.
ANZ400 1129 Pm Edt Sat Apr 10 2021
Synopsis for the coastal waters from sandy hook nj to fenwick island de and for delaware bay.. Developing low pressure over the mid- mississippi valley will lift north into the great lakes tonight through Sunday. A warm front extending out from that low will lift north through the region tonight, and then a cold front will pass through the region Sunday night. A broad area of low pressure will meander over the region into next week.


7 Day Forecast for Marine Location Near Swedesboro , NJ
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location: 39.72, -75.3     debug


Area Discussion for - Philadelphia/Mount Holly, PA
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FXUS61 KPHI 110303 AFDPHI

Area Forecast Discussion National Weather Service Mount Holly NJ 1103 PM EDT Sat Apr 10 2021

SYNOPSIS. Developing low pressure over the Mid- Mississippi Valley will lift north into the Great Lakes tonight through Sunday. A warm front extending out from that low will lift north through the region tonight, and then a cold front will pass through the region Sunday night. A broad area of low pressure will meander over the region into next week.

NEAR TERM /THROUGH SUNDAY NIGHT/. The forecast is mostly on track so far this evening. The lower clouds from today have dissipated and mainly high level clouds are in place across the area. The exception to this is low clouds and fog that is beginning to make its way onshore across the New Jersey coast. This cloud cover and fog is forecast to move inland through the evening hours, before additional cloud cover develops overnight as rainfall begins to move into the southern portions of the area shortly after midnight. As a warm front moves into the area overnight, the rainfall will spread northward, with all areas receiving rainfall by daybreak. As the warm front continues to lift northward through daybreak, enhanced lift will move across the area as well as the associated short wave/vorticity impulse moves across the area as well. This could lead to a period of moderate showers for a few hours Sunday morning. High resolution guidance is in relatively good agreement with the timing of this first round of showers between 06 and 18Z. There is the potential for some patchy fog to develop north of the lifting warm front before the rainfall moves into the area, but how dense the fog gets is still quite uncertain. High resolution guidance is in relatively good agreement with the timing of this first round of showers between 06 and 18Z. With the relatively high dewpoints and lower clouds (especially during the second half of the night), lows tonight will be well above normal in the 50s for most locations.

There is still a question as to where the warm front will end up by mid day Sunday. Most guidance depicts the warm front either stalling or even transitioning to a cold front briefly in the afternoon. This will be key both for temperatures as well as thunderstorm potential. The weak flow in the lower levels and a secondary surface low developing along the cold front to our west during the day would favor this solution with the warm front staying generally along or south of the I-78 corridor. Consequently, for areas along and south of Reading to Philadelphia, expect temperatures to get into the 70s (temperatures near 80 may even be possible in interior portions of Delmarva). North of this area though, highs should be in the 50s and 60s.

The second round of showers and thunderstorms should arrive with the cold front. For the most part, it looks like this won't arrive in our region until the evening hours, but I could see this being slightly faster depending on if the secondary low along the front doesn't deepen as much as currently depicted. Assuming the warm front stays over our region, most of the region should have limited instability. However, over Delmarva (or the rest of the region if the warm front lifts further north), ML CAPE values near 1000 J/Kg are possible. Bulk shear values could be 20 to 35 kt. Based on this, some strong storms (primarily for wind gusts) are certainly possible, but it doesn't appear to be a widespread threat.

Clouds and rain should clear out quickly in the wake of the cold front Sunday night.

SHORT TERM /MONDAY THROUGH TUESDAY/. A weakening closed upper low will be located northwest of the area on Monday, which is forecast to open with its associated vorticity maxima ejecting east across the area on Tuesday. At the surface, broad low pressure will also be located northwest of the area with surface ridging impinging from the northeast. Basically the main takeaways for this pattern in this period will be cool, mostly cloudy, and damp especially across New Jersey and eastern Pennsylvania. Delmarva actually looks to stay west of the cold air damming boundary, so warmer temperatures and less sky cover can be expected there. As far as precip goes, some light rain showers are possible across Pennsylvania and New Jersey with generally better chances toward the north and west closer to the upper low. Confidence on the coverage and timing of the showers remains low however, so we've maintained slight chance to chance PoP at most.

LONG TERM /TUESDAY NIGHT THROUGH SATURDAY/. The long term period will start Wednesday with 2 closed upper lows across the CONUS. The polar jet will be located well to the north of the region. The closed lows should open with the pattern trending more progressive by Friday or Saturday. There will be a possibility of more diurnally driven showers just about every day, with the highest chances Wednesday with the closed upper low nearly overhead. This should also be the most cloudy of the days in the period, with cloud cover generally lessening toward the end of the week as the upper low moves offshore and flow becomes zonal across the CONUS. Temperatures should be largely near climatological normals (highs ~60s/lows ~40s).

AVIATION /03Z SUNDAY THROUGH THURSDAY/. The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY and surrounding areas.

Through Tonight . Conditions should start mostly VFR. The exception to this is IFR ceilings that are already moving into the southern New Jersey coast. These low clouds will continue to move inland through this evening, before additional low clouds develop later this evening and overnight as rainfall moves across the area. By late tonight as rain starts to move in, expect widespread IFR conditions, and some LIFR conditions possible. Winds will become southeasterly around 5 to 10 knots through this evening. Moderate confidence on the overall pattern but low confidence on the details, especially timing.

Sunday . IFR/LIFR conditions will begin the day as rainfall moves across the area. An improvement to MVFR will likely occur from PHL southward as the initial round of rain moves north of the area. A brief period of VFR conditions is possible for southern New Jersey, Delaware, and Maryland. Winds will start out mostly southeasterly, but could shift to southerly, especially along and south of KPHL. Wind speeds should be 5 to 10 kt. Moderate confidence on the overall pattern but low confidence on the details, especially timing.

Outlook .

Sunday night . A second round of rain showers and a few thunderstorms is expected Sunday evening, possibly continuing into the overnight hours. With this round of showers, MVFR and IFR conditions are possible, with conditions improving quickly to VFR behind a cold front. Expect an abrupt shift from southerly or easterly winds to northerly winds behind the front. Wind speeds should be generally 5 to 10 kt. Moderate confidence.

Monday . MVFR ceilings probable at times, especially overnight. Rain showers possible. Winds northeast around 5-10 kts. Moderate confidence.

Tuesday . Lingering MVFR ceilings possible, otherwise VFR. Rain showers possible. Easterly winds becoming southeasterly around 5 kts. Moderate confidence.

Wednesday . Mostly VFR expected outside of any rain showers that may locally reduce restrictions. Northerly winds around 5-10 kts. Moderate confidence.

MARINE. Fog is expected to affect the ocean waters and southern portions of the Delaware Bay tonight and based on the latest obs from places like Wildwood, Atlantic City, and along Long Island we have gone ahead an issued a Marine Dense Fog Advisory which is in effect until 9 AM Sunday.

Winds and seas should stay below Small Craft Advisory tonight. On Sunday, seas could approach 5 ft on the Atlantic coastal waters, but conditions should mostly stay below SCA criteria. Sunday night, seas are expected to exceed 5 ft on the central and northern NJ coastal waters.

Outlook .

Monday . Northeast winds are forecast to be around 15-20 kts with seas building to 4-6 feet across the ocean waters. A Small Craft Advisory has been issued through Monday for the northern ocean waters, but this may need to be extended in time or expanded in area later.

Tuesday through Wednesday . Easterly winds of 5-10 kts and and seas 2-4 feet are forecast for this period. Marine headlines are not anticipated.

PHI WATCHES/WARNINGS/ADVISORIES. PA . None. NJ . None. DE . None. MD . None. MARINE . Dense Fog Advisory until 9 AM EDT Sunday for ANZ431-450>455. Small Craft Advisory from 11 PM Sunday to 6 PM EDT Monday for ANZ450-451.

Synopsis . MPS/Staarmann Near Term . Johnson/Robertson Short Term . Staarmann Long Term . Staarmann Aviation . Johnson/Robertson/Staarmann Marine . Fitzsimmons/Johnson/Staarmann


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MRCP1 - 8540433 - Marcus Hook, PA 9 mi66 min 60°F 55°F1007.1 hPa
PHBP1 - 8545240 - Philadelphia, PA 17 mi66 min 60°F 53°F1007.4 hPa
DELD1 - 8551762 - Delaware City, DE 18 mi66 min SSW 1.9 G 4.1 56°F 1007.8 hPa
RDYD1 - 8551910 - Reedy Point, DE 18 mi66 min 56°F 55°F1007.4 hPa
BDSP1 21 mi66 min 61°F 53°F1007.7 hPa
SJSN4 - 8537121 - Ship John Shoal, NJ 29 mi66 min 53°F 53°F1008.5 hPa
CHCM2 - 8573927 - Chesapeake City, MD 30 mi66 min E 1.9 G 1.9 56°F 58°F1007.8 hPa
BDRN4 - 8539094 - Burlington, Delaware River, NJ 34 mi84 min S 2.9 G 5.1 59°F 56°F1008.1 hPa
NBLP1 - 8548989 - Newbold, PA 41 mi66 min S 2.9 G 5.1 58°F 56°F1008.8 hPa
JCRN4 - Jacques Cousteau Reserve, NJ 46 mi90 min ESE 2.9 57°F 1010 hPa56°F

Wind History for Philadelphia, PA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Philadelphia, Philadelphia International Airport, PA12 mi66 minN 010.00 miMostly Cloudy59°F56°F90%1007.8 hPa
Wilmington, New Castle County Airport, DE16 mi69 minN 09.00 miMostly Cloudy57°F56°F96%1008.1 hPa

Link to 5 minute data for KPHL

Wind History from PHL (wind in knots)
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Last 24hrE6E4E5E4E4N4NE4NE46E6E4CalmNW5W7W4SW8W10W8SW5E3SE5S3S6Calm
1 day agoCalmCalmSE3CalmCalmE3E5E6E9SE7E7E7SE6E9E10E4SE4E6E7E7E9CalmE5E5
2 days agoE3E8CalmE5E5NE3NE4E4E3E4E5E6SE7SE9
G17
E7W14W14W10S7SW9S6SW6S33

Tide / Current Tables for Auburn, Oldmans Creek, New Jersey
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Auburn
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Sun -- 03:58 AM EDT     2.92 feet High Tide
Sun -- 06:29 AM EDT     Sunrise
Sun -- 06:36 AM EDT     Moonrise
Sun -- 09:51 AM EDT     0.05 feet Low Tide
Sun -- 04:18 PM EDT     2.86 feet High Tide
Sun -- 07:17 PM EDT     Moonset
Sun -- 07:35 PM EDT     Sunset
Sun -- 10:10 PM EDT     0.11 feet Low Tide
Sun -- 10:32 PM EDT     New Moon
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.11.72.32.82.92.621.40.80.30.10.30.91.52.12.62.82.72.21.610.50.10.3

Tide / Current Tables for Philadelphia, Pennsylvania Current
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Philadelphia
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Sun -- 12:21 AM EDT     1.36 knots Max Flood
Sun -- 02:17 AM EDT     -0.00 knots Slack
Sun -- 05:21 AM EDT     -1.67 knots Max Ebb
Sun -- 06:28 AM EDT     Sunrise
Sun -- 06:35 AM EDT     Moonrise
Sun -- 09:23 AM EDT     0.01 knots Slack
Sun -- 12:28 PM EDT     1.24 knots Max Flood
Sun -- 02:32 PM EDT     -0.00 knots Slack
Sun -- 05:32 PM EDT     -1.59 knots Max Ebb
Sun -- 07:16 PM EDT     Moonset
Sun -- 07:34 PM EDT     Sunset
Sun -- 09:49 PM EDT     0.00 knots Slack
Sun -- 10:32 PM EDT     New Moon
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.31.20.3-0.7-1.4-1.7-1.6-1.5-1.3-0.50.71.21.21.20.6-0.5-1.2-1.5-1.6-1.4-1.3-0.90.21

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