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Marine Weather and Tides
Version 3.4 |
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed. 10/9/2019 Updated the Marine Zones. 9/4/2019 Fixed the weather maps due to NOAA moving them. 7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports. |
| Sunrise 5:44AM | Sunset 8:30PM | Tuesday July 7, 2020 5:21 AM EDT (09:21 UTC) | Moonrise 9:39PM | Moonset 6:58AM | Illumination 96% |  |
ANZ454 Coastal Waters From Cape May Nj To Cape Henlopen De Out 20 Nm- 401 Am Edt Tue Jul 7 2020
Today..S winds 5 to 10 kt with gusts up to 20 kt, increasing to 10 to 15 kt with gusts up to 20 kt late. Seas 2 ft or less, then around 3 ft this afternoon. Patchy fog early this morning. A chance of showers early this morning, then a chance of showers with a slight chance of tstms late this morning and afternoon. Vsby 1 to 3 nm early this morning. SWell mainly from the se with a dominant period of 8 seconds.
Tonight..S winds around 15 kt with gusts up to 20 kt, diminishing to around 10 kt with gusts up to 20 kt in the late evening and overnight. Seas around 3 ft. A chance of showers early in the evening. SWell mainly from the se with a dominant period of 8 seconds.
Wed..S winds around 10 kt. Gusts up to 20 kt in the afternoon. Seas around 3 ft. SWell mainly from the se with a dominant period of 6 seconds.
Wed night..SE winds 5 to 10 kt. Seas around 3 ft in the evening, then 2 ft or less. SWell mainly from the se with a dominant period of 6 seconds.
Thu..SE winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Seas around 3 ft.
Thu night..SE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft, building to 4 to 6 ft after midnight. A chance of showers.
Fri..SE winds 10 to 15 kt. Seas 4 to 6 ft. A chance of tstms.
Fri night..S winds 10 to 15 kt, becoming sw after midnight. Seas 3 to 5 ft. A chance of tstms.
Sat..SW winds around 10 kt. Seas 3 to 4 ft. A chance of showers in the morning, then a chance of tstms in the afternoon.
Sat night..SW winds 5 to 10 kt. Seas 3 to 4 ft. A chance of tstms in the evening. Winds and seas higher in and near tstms.
Today..S winds 5 to 10 kt with gusts up to 20 kt, increasing to 10 to 15 kt with gusts up to 20 kt late. Seas 2 ft or less, then around 3 ft this afternoon. Patchy fog early this morning. A chance of showers early this morning, then a chance of showers with a slight chance of tstms late this morning and afternoon. Vsby 1 to 3 nm early this morning. SWell mainly from the se with a dominant period of 8 seconds.
Tonight..S winds around 15 kt with gusts up to 20 kt, diminishing to around 10 kt with gusts up to 20 kt in the late evening and overnight. Seas around 3 ft. A chance of showers early in the evening. SWell mainly from the se with a dominant period of 8 seconds.
Wed..S winds around 10 kt. Gusts up to 20 kt in the afternoon. Seas around 3 ft. SWell mainly from the se with a dominant period of 6 seconds.
Wed night..SE winds 5 to 10 kt. Seas around 3 ft in the evening, then 2 ft or less. SWell mainly from the se with a dominant period of 6 seconds.
Thu..SE winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Seas around 3 ft.
Thu night..SE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft, building to 4 to 6 ft after midnight. A chance of showers.
Fri..SE winds 10 to 15 kt. Seas 4 to 6 ft. A chance of tstms.
Fri night..S winds 10 to 15 kt, becoming sw after midnight. Seas 3 to 5 ft. A chance of tstms.
Sat..SW winds around 10 kt. Seas 3 to 4 ft. A chance of showers in the morning, then a chance of tstms in the afternoon.
Sat night..SW winds 5 to 10 kt. Seas 3 to 4 ft. A chance of tstms in the evening. Winds and seas higher in and near tstms.
ANZ400 401 Am Edt Tue Jul 7 2020
Synopsis for the coastal waters from sandy hook nj to fenwick island de and for delaware bay.. A summer-like pattern will persist throughout the week with scattered showers and Thunderstorms expected most days along with above average temperatures. A coastal storm will impact the region Friday through Saturday as it moves north from the carolinas. A cold front will follow the coastal storm over the weekend.
Synopsis for the coastal waters from sandy hook nj to fenwick island de and for delaware bay.. A summer-like pattern will persist throughout the week with scattered showers and Thunderstorms expected most days along with above average temperatures. A coastal storm will impact the region Friday through Saturday as it moves north from the carolinas. A cold front will follow the coastal storm over the weekend.
7 Day Forecast for Marine Location Near Rehoboth Beach, DE
Hourly EDIT Helplocation: 38.72, -75.08 debug
Area Discussion for - Philadelphia/Mount Holly, PA
(on/off) Help NOTE: mouseover dotted underlined text for definitionFXUS61 KPHI 070751 AFDPHI
Area Forecast Discussion National Weather Service Mount Holly NJ 351 AM EDT Tue Jul 7 2020
SYNOPSIS. A summer-like pattern will persist throughout the week with scattered showers and thunderstorms expected most days along with above average temperatures. A coastal storm will impact the region Friday through Saturday as it moves north from the Carolinas. A cold front will follow the coastal storm over the weekend.
NEAR TERM /UNTIL 6 AM THIS MORNING/. Patchy fog and low clouds are starting to develop across the region, especially in those areas that saw heavier rain yesterday. As we go through the morning, ceilings will lift and fog will dissipate.
The main problem for today will be just how much the atmosphere can rebound from being so worked over yesterday. Model soundings show increasing instability as we head towards this afternoon and some of the CAMs have scattered to widespread convection developing over our forecast area. One issue is the cloud cover and how fast it gives way to sunny skies. We also lack a source of extra lift across the region as weak ridging is present aloft and no shortwaves rotate through the flow into our area today. One plus is that we have decently high CAPE values (1500-2000 J/kg) so the instability will be there. Once again, we have very weak steering flow across the region so not much help in keeping things moving should they develop. With PWATs still around 1.5-2.0", heavy, torrential rains will be possible and the greatest concern will certainly be in those areas that saw abundant rain yesterday. So while the severe threat is less the flooding threat remains pretty high. The worded forecast may be more pessimistic than it actually appears as majority of anything that does get going will likely be later in the day and may be more isolated to scattered.
With plenty of moisture across the region and highs rising into the mid to upper 80s today, it will feel humid and uncomfortable. Winds will be generally out of the south to southeast through the day today and mainly around 10 to 15 mph but unfortunately might not provide much relief from the heat and humidity.
SHORT TERM /6 AM THIS MORNING THROUGH 6 PM TODAY/. Convection is expected to dwindle into this evening and then dissipate overnight. A few isolated showers may continue across our northern zones after midnight but for the most part we should have dry conditions across the forecast area.
Conditions will remain warm and muggy as the flow remains out of the south/southeast. With continued low level moisture, we will once again see some patchy fog develop but confidence is low as to exactly where it will be since it may be largely dependent on where the rain falls. Overnight lows will be in the upper 60s to lower 70s.
LONG TERM /TONIGHT THROUGH MONDAY/. The extended appears to be fairly active with several events to note. Wednesday starts off quiet from a sensible weather perspective as a mid level ridge sits over the region. Max temps will again start to push back into the low 90s as modest warm air advection returns.
While the Mid-Atlantic is briefly quiet, our attention turns further south to the potential development of a symmetric warm core low pressure system that is expected to develop somewhere between Georgia and the Carolinas. The 12z and 18z guidance developed a weak low pressure system that takes on tropical characteristics as it moves eastward to the Atlantic. Once the system reaches the Atlantic, the Bermuda High should start to push the system towards the north up the Altantic coastline Friday into Saturday. Based on this guidance, the National Hurricane Center has upgraded the Tropical Weather Outlook to indicate a 40% chance of tropical development within the next 5 days. The 00z guidance this morning offers a slightly different solution as the low pressure system starts off symmetric warm core, but quickly undergoes extra-tropical transition becoming a cold core asymmetric system based on analysis of cyclone phase space diagrams available at moe.met.fsu.edu/cyclonephase
Time will tell on how the system develops and/or how it will impact the area. However the idea that we could see a coastal low pressure system moving up the coast Thursday night into Friday appears fairly likely. This will have the potential to cause an increase in coastal tidal heights and the possibility for moderate to heavy rain depending on where the center of the low actually tracks.
As the low tracks to the north, it quickly gets pushed out of the region by a deepening mid level trough dropping out of the Great Lakes. This will bring another round of widespread rainfall with scattered thunderstorms across the region. Height falls are fairly strong with the cold front and almost all of the medium ranged guidance indicates that we'll be sitting in the right rear entrance region of a 250mb jet. So there should be substantial synoptic lift available and when considering temps will again be pushing into the upper 80's to low 90s with dew points above 70F we'll likely see fairly widespread thunderstorms as EQ's are progged to be in excess of 30kFt with temps of -35C. Of course this is all based on trends in the latest suite of medium ranged guidance and subtle changes to the location of the upper level jet/mid level trough/height falls will all have significant impacts on the potential for potent thunderstorms.
Coming out of the weekend the low pressure system that should track through our area on Saturday will run into a road block in the form of a broad Atlantic high pressure system. The high will force the low north and may bring an elongated low pressure system back onshore causing another round of showers and potential thunderstorms but at this rate, I dont have a significant amount of confidence in what will happen beyond the frontal passage over the weekend based on trends in guidance.
AVIATION /08Z TUESDAY THROUGH SATURDAY/. The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY and surrounding areas.
Through early morning . VFR conditions are prevailing at many of the terminals but satellite shows the low clouds starting to spread inland and across the region. Expect ceilings to drop to MVFR and then IFR, mainly between 09Z-10Z. Confidence remains low at just how many terminals will drop below MVFR at this time. Light easterly winds to light and variable around the region. Moderate confidence on the overall pattern but low confidence on fog/low clouds and timing.
Today . Fog/low clouds may linger into the morning hours but should give way to VFR conditions by 14Z/15Z. There is another chance for showers and thunderstorms after 18Z. However, it is difficult to determine which TAF sites will be impacted at this point so have mainly included VCTS for the afternoon hours at this time. Mostly south winds around 10 knots outside of storms. Moderate confidence for most aspects of the forecast, but low confidence on the potential for and location of storms.
Tonight . VFR conditions expected with possible MVFR conditions north and west of KPHL. Light southerly winds. Low confidence.
Outlook .
Wednesday through Thursday . Prevailing VFR expected, however scattered showers and thunderstorms, generally between 18Z and 06Z each day, may locally lower restrictions. Winds will be generally southerly becoming southeasterly around 10 kts. Moderate confidence.
Friday . MVFR/IFR ceilings probable with southeasterly to easterly winds around 10 kts. Scattered moderate to locally heavy showers with embedded thunderstorms will lower visibility and ceiling restrictions locally. Low to Moderate confidence.
Saturday . Mainly VFR expected with rapidly lowering flight conditions in showers and thunderstorms. Moderate confidence.
MARINE. Sub-advisory conditions are expected to continue on the area waters through Tuesday. South to southeast winds around 10 to 15 knots with some gusts around 20 knots. Winds will drop down to around 5 to 10 knots overnight. Seas will be around 2 to 3 feet on the ocean waters.
Outlook .
Wednesday through Thursday: Expect sub-sca conditions with gusts up to 15 kts and winds initially starting southerly becoming southeasterly by Thursday afternoon. Seas will be generally 2-3 feet. Afternoon and evening showers and thunderstorms are possible Tuesday through Thursday, which may locally increase winds and seas.
Friday through Saturday: SCA conditions anticipated beginning Friday as seas build to 7 feet on easterly flow with gusts up to 20 kts. This continues on Saturday with seas anticipated to be 5 to 7 feet during the day with the flow becoming west to southwest behind a coastal low. Showers and thunderstorms certainly remain possible which may locally increase winds and and seas.
Rip Currents .
There is a low risk for the development of dangerous and life threatening rip currents through Thursday due to the combination of shorter period swells and relatively low surf heights.
However heading into Friday, we anticipate the risk for dangerous rip currents to increase substantially. As seas build over the region, and we go through a prolonged period of longer period onshore swell, the risk for dangerous, life threatening rip currents will increase to at least moderate and possibly high especially for the Jersey coastline. Those with beach interests should monitor conditions closely as the development of dangerous rip currents seems quite likely based on latest trends in the forecast.
EQUIPMENT. There is an issue with the observation equipment at Reading, KRDG. Technicians will be taking a look at the equipment on Tuesday.
The NOAA Weather Radio All Hazards broadcast from Hibernia Park, PA (WNG704) remains off the air until further notice due to damage to the antenna during the June 3 derecho.
PHI WATCHES/WARNINGS/ADVISORIES. PA . None. NJ . None. DE . None. MD . None. MARINE . None.
Synopsis . Deal Near Term . Meola Short Term . Meola Long Term . Deal Aviation . Deal/Meola Marine . Deal/Meola Equipment . WFO PHI
Weather Reporting Stations
EDIT (on/off) Help NOTE: Click on distance to see the station location on a map| Stations | Dist | Age | Wind | Air Temp | Water Temp | Waves | Pressure | DewPt |
| LWSD1 - 8557380 - Lewes, DE | 5 mi | 51 min | ESE 5.1 G 5.1 | 72°F | 73°F | 1017.9 hPa | ||
| CMAN4 - 8536110 - Cape May, NJ | 18 mi | 51 min | ENE 1.9 G 4.1 | 71°F | 76°F | 1018 hPa | ||
| BRND1 - 8555889 - Brandywine Shoal Light, DE | 19 mi | 51 min | SSE 7 G 8.9 | 1018.5 hPa | ||||
| 44009 - DELAWARE BAY 26 NM Southeast of Cape May, NJ | 27 mi | 91 min | 2 ft | |||||
| OCIM2 - 8570283 - Ocean City Inlet, MD | 27 mi | 51 min | ESE 7 G 8 | 72°F | 71°F | 1018 hPa | ||
| SJSN4 - 8537121 - Ship John Shoal, NJ | 43 mi | 51 min | Calm G 0 | 71°F | 1018.3 hPa |
Wind History for Lewes, DE
(wind in knots) EDIT (on/off) Help| 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | |
| Last 24hr | SW G11 | SW G11 | SW G12 | SW G12 | SW G12 | W G11 | NE | SW G9 | SE G14 | SW G12 | E G38 | SE G20 | SE G15 | E G26 | E | SE G15 | NE | -- | SW | SW G8 | S G7 | E | SE | E |
| 1 day ago | S | SW | SW | N | NE | E G7 | W G11 | NW G8 | SE | S G11 | S G11 | S | S | W G10 | SW | SW G9 | SW G11 | SW G9 | SW G10 | SW G10 | SW G13 | SW G12 | SW G9 | SW G9 |
| 2 days ago | E G13 | E G11 | E | E G11 | E | E | E | E | E | E G13 | E G11 | SE G12 | SE | SE | SE G7 | SE | SE | SE G9 | SE | S | SW | SW | SW | SW |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports. Follow links for more data.| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Georgetown - Delaware Coastal Airport, DE | 15 mi | 27 min | NE 3 | 10.00 mi | A Few Clouds | 71°F | 69°F | 94% | 1017.6 hPa |
| Wildwood, Cape May County Airport, NJ | 22 mi | 4.4 hrs | SSW 9 | 10.00 mi | Light Rain | 72°F | 70°F | 94% | 1017.9 hPa |
Link to 5 minute data for KGED
Wind History from GED (wind in knots)
| 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | |
| Last 24hr | SW | SW | SW | SW | SW | SW | SW | S G17 | SW | W G20 | W G19 | SW | SW | E G28 | E | E | N G21 | E | W | SW | SW | S | E | NE |
| 1 day ago | S | Calm | Calm | SW | W | SW | S | W | W G17 | SW | W | SW | SW | SW | SW | SW | S | SW | SW | SW | SW | SW | ||
| 2 days ago | Calm | NE | E | E | E | NE | E | E | E | E | E | SE | E | E | SE | Calm | S | Calm | Calm | Calm | Calm | Calm |
Tide / Current Tables for Rehoboth Beach, Delaware
EDIT Weekend mode (on/off) (on/off) Help One Week of DataRehoboth Beach
Click for Map
Tue -- 04:02 AM EDT -0.26 feet Low Tide
Tue -- 05:42 AM EDT Sunrise
Tue -- 07:58 AM EDT Moonset
Tue -- 10:13 AM EDT 3.96 feet High Tide
Tue -- 04:06 PM EDT 0.27 feet Low Tide
Tue -- 08:27 PM EDT Sunset
Tue -- 10:25 PM EDT 4.69 feet High Tide
Tue -- 10:38 PM EDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Tue -- 04:02 AM EDT -0.26 feet Low Tide
Tue -- 05:42 AM EDT Sunrise
Tue -- 07:58 AM EDT Moonset
Tue -- 10:13 AM EDT 3.96 feet High Tide
Tue -- 04:06 PM EDT 0.27 feet Low Tide
Tue -- 08:27 PM EDT Sunset
Tue -- 10:25 PM EDT 4.69 feet High Tide
Tue -- 10:38 PM EDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
| 12 am | 1 am | 2 am | 3 am | 4 am | 5 am | 6 am | 7 am | 8 am | 9 am | 10 am | 11 am | 12 pm | 1 pm | 2 pm | 3 pm | 4 pm | 5 pm | 6 pm | 7 pm | 8 pm | 9 pm | 10 pm | 11 pm |
| 3.3 | 2.2 | 1 | 0.1 | -0.3 | 0.1 | 0.9 | 1.9 | 2.9 | 3.6 | 3.9 | 3.8 | 3.1 | 2.2 | 1.4 | 0.6 | 0.3 | 0.5 | 1.3 | 2.4 | 3.4 | 4.2 | 4.6 | 4.6 |
Tide / Current Tables for Delaware Bay Entrance, Delaware Current
EDIT (on/off) Help One Week of DataDelaware Bay Entrance
Click for Map
Tue -- 03:34 AM EDT -1.59 knots Max Ebb
Tue -- 05:42 AM EDT Sunrise
Tue -- 06:45 AM EDT 0.00 knots Slack
Tue -- 07:57 AM EDT Moonset
Tue -- 09:21 AM EDT 1.30 knots Max Flood
Tue -- 12:22 PM EDT -0.00 knots Slack
Tue -- 03:39 PM EDT -1.18 knots Max Ebb
Tue -- 06:19 PM EDT 0.00 knots Slack
Tue -- 08:27 PM EDT Sunset
Tue -- 09:27 PM EDT 1.60 knots Max Flood
Tue -- 10:38 PM EDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Tue -- 03:34 AM EDT -1.59 knots Max Ebb
Tue -- 05:42 AM EDT Sunrise
Tue -- 06:45 AM EDT 0.00 knots Slack
Tue -- 07:57 AM EDT Moonset
Tue -- 09:21 AM EDT 1.30 knots Max Flood
Tue -- 12:22 PM EDT -0.00 knots Slack
Tue -- 03:39 PM EDT -1.18 knots Max Ebb
Tue -- 06:19 PM EDT 0.00 knots Slack
Tue -- 08:27 PM EDT Sunset
Tue -- 09:27 PM EDT 1.60 knots Max Flood
Tue -- 10:38 PM EDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
| 12 am | 1 am | 2 am | 3 am | 4 am | 5 am | 6 am | 7 am | 8 am | 9 am | 10 am | 11 am | 12 pm | 1 pm | 2 pm | 3 pm | 4 pm | 5 pm | 6 pm | 7 pm | 8 pm | 9 pm | 10 pm | 11 pm |
| -0 | -0.7 | -1.2 | -1.5 | -1.6 | -1.2 | -0.5 | 0.2 | 0.9 | 1.3 | 1.2 | 0.8 | 0.2 | -0.4 | -0.8 | -1.1 | -1.2 | -0.8 | -0.2 | 0.5 | 1.1 | 1.6 | 1.5 | 1.1 |
Weather Map
(on/off) Help Weather Map
GEOS Local Image of Mid-Atlantic EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for Philadelphia/Mount Holly, PA (5,6,7,8)
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Ground Weather Radar Station Dover AFB, DE
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