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Marine Weather and Tides
Version 3.4 |
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported. 5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive. 5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds. |
| Sunrise 6:51AM | Sunset 6:51PM | Tuesday September 26, 2017 10:32 AM EDT (14:32 UTC) | Moonrise 11:54AM | Moonset 10:01PM | Illumination 34% |  |
Marine Forecasts
EDIT (on/off) Help| ANZ430 Delaware Bay Waters North Of East Point Nj To Slaughter Beach De- 915 Am Edt Tue Sep 26 2017 Rest of today..NE winds around 10 kt with gusts up to 15 kt. Waves 2 ft or less. Tonight..NE winds 5 to 10 kt with gusts up to 15 kt. Waves 2 ft or less. Wed..NE winds 10 to 15 kt with gusts up to 20 kt. Waves 2 ft or less. Wed night..N winds 5 to 10 kt with gusts up to 15 kt. Waves 2 ft or less. Thu..N winds 10 to 15 kt with gusts up to 20 kt. Waves around 3 ft. Thu night..N winds 10 to 15 kt with gusts up to 20 kt. Waves 2 ft or less. Fri..N winds 10 to 15 kt, becoming nw 5 to 10 kt in the afternoon. Waves 2 ft or less. Fri night..W winds around 5 kt. Waves 2 ft or less. A chance of showers after midnight. Sat..N winds 5 to 10 kt with gusts up to 15 kt. Waves 2 ft or less. A chance of showers in the morning. Sat night..NE winds 5 to 10 kt with gusts up to 15 kt. Waves 2 ft or less. | ANZ400 915 Am Edt Tue Sep 26 2017 Synopsis for the coastal waters from sandy hook nj to fenwick island de and for delaware bay.. Hurricane maria will move slowly northward off the coast of the outer banks through Wednesday before turning sharply east- northeastward into the open atlantic through the end of the week. A cold front will move through the mid-atlantic on Thursday, and a reinforcing front will progress through the area Friday and Friday night. Cool high pressure will settle into the northeast this weekend through at least early next week. && |
7 Day Forecast for Marine Location Near Millbourne borough, PA
Hourly EDIT Helplocation: 39.96, -75.18 debug
Area Discussion for - Philadelphia/Mount Holly, PA
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus61 kphi 261326 afdphi area forecast discussion national weather service mount holly nj 926 am edt Tue sep 26 2017 Synopsis Hurricane maria will move slowly northward off the coast of the outer banks through Wednesday before turning sharply east- northeastward into the open atlantic through the end of the week. A cold front will move through the mid-atlantic on Thursday, and a reinforcing front will progress through the area Friday and Friday night. Cool high pressure will settle into the northeast this weekend through at least early next week. Near term until 6 pm this evening High pressure will remain over the northeastern states today. Hurricane maria will be located off the north carolina coast. The circulation around the two systems will keep an onshore flow in our region for today. Low clouds remained along and to the southeast of the interstate 95 corridor at mid morning. The sky was mostly sunny in areas to the northwest. The low clouds are forecast to erode slowly during the late morning and early afternoon hours. They may linger through the day near the coast. The wind should favor the northeast and east. Speeds are expected to be around 10 mph on the coastal plain and around 5 mph inland. Gusts are expected along the coast. Maximum temperatures are anticipated to be in the 70s near the coast due to the onshore flow, and in the 80s inland. Short term 6 pm this evening through 6 am Wednesday Low clouds and patchy fog will develop once again across the coastal plain and the DELMARVA late tonight. NE winds will diminish to 5-10 mph along the coasts and to 5 mph or less inland. Meanwhile, maria will begin to weaken to a tropical storm as it begins to sharply curve out to sea. A few outer rain bands may move into southern portions of the forecast area, but not expecting much, if any, qpf. Lows tonight generally in the low 60s to the north and in the upper 60s to around 70 to the south. Long term Wednesday through Monday Main forecast concerns for the long-term period are precipitation chances Wednesday and again Friday night and Saturday and a sharp downward trend with temperatures versus what has been observed recently. Analysis of the 00z operational model suite suggests that the overall large-scale pattern is decently agreed upon, but rather large discrepancies exist with the smaller-scale vorticity maxima that will be progressing through and or affecting our region through the period. Additionally, poor run-to-run model continuity continues, owing largely to uncertainty with the flow pattern in the northern pacific and the apparent substantial influences downstream. At 12z Wednesday, maria will be off the coast of the outer banks. A potent vort MAX will be progressing through ontario with southwesterly midlevel flow between the two. Although the main impacts from maria will be well south east of the area, the pressure gradient will be tightening in the southern cwa, so expect breezy conditions to develop in southern delaware and far southeast new jersey. Northeasterly surface flow should keep the area socked in clouds much of the day, with only gradual improvement from northwest to southeast. Some showers are possible, especially near the coast, as maria makes its closest approach to the area. However, a considerable portion of the model output is dry through Wednesday night. The exceptions are the 00z cmc ecmwf, which indicate some QPF close to the coast. The totals from the cmc look overdone, but the geographic agreement with the ECMWF suggests that precipitation chances should remain. I did lower them considerably northwest of i-95, where there is little remaining evidence of sufficient lift for showers. One noteworthy development: the 00z ECMWF is considerably slower and continues on the west side of the guidance with the track of maria. By Thursday, it becomes an outlier with the position of maria, so I neglected to give the new simulation strong weighting in the forecast. As the ontario trough moves rapidly east-northeast into the canadian maritimes on Thursday, maria should begin the eastward turn. The ECMWF is weakest with this trough and considerably more sluggish in advancing maria farther offshore - this does lower confidence in Thursday's forecast a little bit. A surface low will develop and progress rapidly eastward through quebec and new brunswick, with a cold front sweeping across the eastern seaboard Thursday. Cooler and noticeably drier air will seep into the mid-atlantic upstream of the front, with forecast highs Thursday around 10 degrees colder in the urban corridor and up to 20 degrees colder in the southern poconos. The change should be less severe near the coast (which will be cooler on Wednesday given the onshore flow). Kept most of Thursday dry given the subsidence upstream of the front. An upstream shortwave trough digs southeastward into the great lakes Thursday night, and this is where much of the forecast uncertainty lies. The GFS is much more progressive with this trough than the cmc and especially the ecmwf. The GFS has trended stronger with the first trough in eastern canada and weaker with the second, which does not agree with the recent trends of the NAM or ecmwf. Additionally, there is very large variation in the upstream flow run-to-run with the gfs. The stronger agreement between the cmc ECMWF made me lower the weighting of gfs-based guidance Friday onward, and I may not have done so enough. The main effects on the forecast are with precipitation chances Friday night and Saturday, with the GFS about 6-12 hours faster in general (more Friday night versus early Saturday for the cmc ecmwf). For now, kept the highest pops late Friday night (a compromise of the two camps), but my suspicion is that pops need to linger into a portion of Saturday, especially for the eastern zones. Trended this direction with the forecast, but expect further (perhaps substantial) changes with pops during this period. |
Cool dry high pressure moves in thereafter, with a prolonged period of near to slightly below seasonal temperatures Saturday onward. Models have large phase amplitude variations with the midlevel ridge developing in the east during this period, so the duration of the cool dry spell is a little uncertain at this point. Aviation 13z Tuesday through Saturday The following discussion is for kphl, kpne, kttn, kabe, krdg, kilg, kmiv, kacy and surrounding areas. Stratus producing ifr conditions at kacy kmiv kilg kphl kpne kttn will be slow to dissipate, and conditions will probably not lift toVFR until midday or so. Vfr west of i-95 through the TAF period. Fog stratus looks to redevelop late tonight with sub-vfr conditions likely once again. E-ne winds will increase to 5-10 kt, except at kacy, where e-ne winds will increase to 10-20 kt. Lgt vrb winds tonight. Outlook... Wednesday: MVFR ifr conditions possible, especially from the urban corridor eastward, with gradual improvement toVFR from northwest to southeast during the day. Some showers possible at kmiv kacy. Northeast winds 5 to 15 kts with stronger gusts near the coast (up to 25 kts or so). Confidence below average. Wednesday night and Thursday: winds should become north northwest as a cold front sweeps through the region. May see some lingering showers low clouds at kmiv kacy Wednesday night. Speeds should reach 10 to 20 kts on Thursday, with higher gusts possible. Confidence average. Thursday night and Friday: predominantlyVFR. Northwest winds 5 to 15 kts. Confidence above average. Friday night and Saturday: showers and localized sub-vfr cigs vsbys possible. Winds generally north or northwest around 10 kts. Confidence well below average. Marine Small craft advisory continues today and tonight for the ocean waters. Seas on the ocean will build to 8-9 feet. NE winds will range from 15-20 kt with gusts up to 25 kt for southern nj and de ocean waters. Otherwise, NE winds range from 10-15 kt. With these increasing offshore seas, can expect breaking waves at the shores of around 7 feet at southern nj and de beaches. A high surf advisory has been issued for tonight through Wednesday for southern nj and de coastal areas. Outlook... Wednesday: northeast winds with gusts above 25 kts likely in the southern nj de coastal atlantic, trending lighter in delaware bay and the northern central marine zones. Seas near 10 feet in the atlantic, with rough surf likely. A high surf advisory continues for the southern nj delaware beaches. Showers possible. Wednesday night: gradual decrease in winds, though advisory- level gusts still possible south of atlantic city. Seas will be slow to decline. A chance of showers. Thursday and Thursday night: cold frontal passage will increase winds to advisory level in the atlantic waters and potentially delaware bay. Seas well above advisory criteria. Friday: seas nearing but likely still above 5 feet, but winds should diminish below advisory criteria. Friday night and Saturday: sub-advisory conditions expected, but a chance of showers. Rip currents... due to swells emanating from hurricane maria, there continues to be a high risk for the development of dangerous and life threatening rip currents for the ocean beaches today and tonight. The rip current risk will likely be in the high category Wednesday and Thursday as long-period southeasterly swells from maria continue. Swell heights around or above 10 feet on Wednesday will likely generate high surf beach erosion issues for much of the surf zone but especially for southern new jersey and delaware. Overall, not a good time to spend at the beach the next few days. Phi watches warnings advisories Pa... None. Nj... High rip current risk through Wednesday afternoon for njz014- 024>026. High surf advisory from 6 pm this evening to 6 pm edt Wednesday for njz024-025. De... High rip current risk through Wednesday afternoon for dez004. High surf advisory from 6 pm this evening to 6 pm edt Wednesday for dez004. Md... None. Marine... Small craft advisory until 6 am edt Thursday for anz452>455. Small craft advisory for hazardous seas until 6 am edt Thursday for anz450-451. Synopsis... Cms near term... Iovino short term... Mps long term... Cms aviation... Cms mps marine... Cms mps |
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 |
| PHBP1 - 8545240 - Philadelphia, PA | 3 mi | 45 min | 71°F | 74°F | 1017.2 hPa | |||
| BDSP1 | 6 mi | 45 min | 69°F | 1017.9 hPa | ||||
| MRCP1 - 8540433 - Marcus Hook, PA | 16 mi | 51 min | 70°F | 76°F | 1017.2 hPa | |||
| BDRN4 - 8539094 - Burlington, Delaware River, NJ | 18 mi | 57 min | ENE 4.1 G 7 | 70°F | 74°F | 1017.4 hPa | ||
| NBLP1 - 8548989 - Newbold, PA | 26 mi | 45 min | NE 5.1 G 8 | 71°F | 76°F | 1018 hPa | ||
| DELD1 - 8551762 - Delaware City, DE | 34 mi | 45 min | ESE 1.9 G 8 | 70°F | 73°F | 1017.3 hPa | ||
| RDYD1 - 8551910 - Reedy Point, DE | 35 mi | 45 min | 69°F | 76°F | 1017 hPa | |||
| CHCM2 - 8573927 - Chesapeake City, MD | 45 mi | 51 min | E 5.1 G 9.9 | 69°F | 76°F | 1017.7 hPa | ||
| SJSN4 - 8537121 - Ship John Shoal, NJ | 46 mi | 45 min | NE 9.9 G 12 | 69°F | 74°F | 1016.6 hPa | ||
| JCRN4 - Jacques Cousteau Reserve, NJ | 48 mi | 63 min | NNE 8 | 69°F | 1017 hPa | 68°F |
Wind History for Philadelphia, PA
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Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Philadelphia, Philadelphia International Airport, PA | 6 mi | 39 min | E 8 | 9.00 mi | Mostly Cloudy | 71°F | 66°F | 84% | 1017.7 hPa |
| Philadelphia, Northeast Philadelphia Airport, PA | 12 mi | 39 min | ENE 7 | 10.00 mi | Overcast | 73°F | 66°F | 81% | 1017.9 hPa |
| Philadelphia - Wings Field Airport, PA | 13 mi | 38 min | E 4 | 10.00 mi | Fair | 72°F | 66°F | 83% | 1018.3 hPa |
| Mount Holly, South Jersey Regional Airport, NJ | 18 mi | 39 min | Var 4 | 10.00 mi | Overcast | 71°F | 69°F | 94% | 1017.7 hPa |
Wind History from PHL (wind in knots)
| 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 | 6 AM | 7 AM | 8 AM | 9 AM | |
| Last 24hr | Calm | Calm | SE | E | E | E | SE | SE | SE | SE | SE | E | E | SE | Calm | SE | NE | NE | NE | NE | NE | NE | NE | |
| 1 day ago | N | N | E | E | E | E | E | E | SE | SE | S | S | SW | S | Calm | Calm | S | SW | S | Calm | Calm | Calm | Calm | SE |
| 2 days ago | N | N | N G16 | N | NE G15 | N | N | N | N | Calm | SW | Calm | Calm | NW | Calm | N | N | Calm | N | N | N | N |
Tide / Current Tables for Market Street Bridge, Schuylkill River, Pennsylvania
EDIT RT Ports Option Weekend mode (on/off) (on/off) Help One Week of Data| Market Street Bridge Click for Map Tue -- 01:03 AM EDT 0.67 feet Low Tide Tue -- 06:19 AM EDT 6.10 feet High Tide Tue -- 06:52 AM EDT Sunrise Tue -- 12:53 PM EDT Moonrise Tue -- 01:09 PM EDT 0.61 feet Low Tide Tue -- 06:39 PM EDT 6.62 feet High Tide Tue -- 06:50 PM EDT Sunset Tue -- 11:01 PM EDT Moonset Tide / Current data from XTide NOT FOR NAVIGATION |
| 12am | 1am | 2am | 3am | 4am | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm | 10pm | 11pm |
| 1.2 | 0.7 | 1.4 | 3.1 | 4.4 | 5.3 | 6 | 5.9 | 5 | 3.8 | 2.7 | 1.8 | 1.1 | 0.6 | 1.1 | 2.9 | 4.6 | 5.7 | 6.4 | 6.6 | 5.9 | 4.8 | 3.7 | 2.6 |
Tide / Current Tables for Philadelphia, Pennsylvania Current
EDIT (on/off) Help One Week of Data| Philadelphia Click for Map Tue -- 01:49 AM EDT 0.00 knots Slack Tue -- 03:26 AM EDT 1.19 knots Max Flood Tue -- 06:49 AM EDT -0.00 knots Slack Tue -- 06:52 AM EDT Sunrise Tue -- 09:41 AM EDT -1.61 knots Max Ebb Tue -- 12:53 PM EDT Moonrise Tue -- 01:53 PM EDT 0.00 knots Slack Tue -- 03:42 PM EDT 1.44 knots Max Flood Tue -- 06:50 PM EDT Sunset Tue -- 07:01 PM EDT -0.00 knots Slack Tue -- 09:50 PM EDT -1.51 knots Max Ebb Tue -- 11:01 PM EDT Moonset Tide / Current data from XTide NOT FOR NAVIGATION |
| 12am | 1am | 2am | 3am | 4am | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm | 10pm | 11pm |
| -0.9 | -0.7 | 0.2 | 1.1 | 1.1 | 0.7 | 0.5 | -0.2 | -1.1 | -1.5 | -1.6 | -1.4 | -0.9 | -0.6 | 0.1 | 1.1 | 1.4 | 0.9 | 0.5 | 0 | -0.8 | -1.4 | -1.5 | -1.4 |
Weather Map and Satellite Images
(on/off) HelpWeather Map | IR Satellite Image from GEOS GOES Local Image of Mid-Atlantic EDIT  |
Wind Forecast for Philadelphia/Mount Holly, PA (10,2,3,4)
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Ground Weather Radar Station Philadelphia, PA
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Disclaimer: The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program. |