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Marine Weather and Tides
Version 3.4 |
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 5:38AM | Sunset 8:34PM | Friday June 23, 2017 4:53 PM EDT (20:53 UTC) | Moonrise 4:21AM | Moonset 7:05PM | Illumination 0% |  |
Marine Forecasts
EDIT (on/off) Help| ANZ541 Choptank River To Cambridge Md And The Little Choptank River- 432 Pm Edt Fri Jun 23 2017 .small craft advisory in effect through Saturday afternoon... Rest of this afternoon..SW winds 15 kt with gusts to 25 kt. Waves 3 ft. Scattered showers with isolated tstms. Tonight..SW winds 15 kt with gusts to 25 kt. Waves 2 ft. Showers likely. Vsby 1 nm or less. Sat..W winds 10 to 15 kt. Gusts up to 25 kt. Waves 2 to 3 ft. A chance of showers. Sat night..NW winds 5 to 10 kt. Waves 1 to 2 ft. Sun..NW winds 5 to 10 kt. Waves 1 ft. Sun night..W winds 5 kt. Waves less than 1 ft. Mon..W winds 5 kt. Waves less than 1 ft. Tue..NW winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. | ANZ500 432 Pm Edt Fri Jun 23 2017 Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will remain offshore today while a cold front slowly approaches from the northwest. The remnants of cindy will track along the front tonight, with the front finally pushing through on Saturday. A weak secondary front will cross Sunday before high pressure returns early next week. Small craft advisory conditions are possible Sunday. |
7 Day Forecast for Marine Location Near Oxford, MD
Hourly EDIT Helplocation: 38.68, -76.17 debug
Area Discussion for - Baltimore, MD/Washington
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus61 klwx 231900 afdlwx area forecast discussion national weather service baltimore md washington dc 300 pm edt Fri jun 23 2017 Synopsis Tropical air will envelop the area today. A cold front will cross the area late tonight into Saturday. High pressure will return Sunday and persist through early next week. Near term through tonight In spite of pockets of insolation, atmosphere within the forecast area capped, as evidenced by the lack of agitated cumulus on satpix and just showers on radar. The same cannot be said across western pennsylvania down the ohio valley, in vicinity of the frontal zone. Storms in that region shear-driven, and that will be our concern tonight. Recent runs of hrrr rap both depict some enhancement of the showers in virginia. Given 1500-2000 j kg sbcape, expect some thunder to develop by mid-late afternoon. That area should be scattered in nature and have a diurnal component to it. By 21-22 utc, the line of thunderstorms, and scattered storms ahead of the line, will be approaching the potomac highlands. With loss of daytime heating and residual inhibition, expect a weakening trend in the strength of convection. But, the overall coverage in the highlands will be increasing. Precipitable water above 2 inches suggests that heavy rain can be expected within any thunderstorm. Latest model guidance (12 utc cycle) offers a quicker timing. The southwesterly low level jet will be substantive (60-70 kt at 850 mb), so anticipate that some thunder can be expected tonight even without daytime heating. As has been discussed the past couple of days, the question remains whether these storms can root in the boundary layer east of the appalachians. If they can, it will be busy, with low-topped rotating updrafts. While heavy rain can be expected too, the system overall remains progressive (quicker than previously modeled), which will preclude greater issues. Bottom line... Have categorical pops crossing forecast area between midnight and 6 am (likely beginning mid-evening), with heavy rain possible. With dewpoints in the lower 70s, low temperatures follow suit. Short term Saturday through Sunday night Latest GFS nam prog timing to be so quick that all precip will be east of the forecast area by the start of the period. Am a little bit caution of that solution, and have lingered some precip into the Saturday morning hours. Then we'll need to assess how quickly front leaves area; there are some suggestions in may get caught up across southern maryland or the virginia tidewater. Otherwise, high pressure will be building across the area this weekend, with no other weather hazards. Perhaps there will be a reinforcing boundary Sunday, but moisture looks scant for even clouds. Accepted a MOS blend for temps. Sunday will be the cooler day, with lower dewpoints also advecting in Saturday. Long term Monday through Friday Surface high pressure sets to the west on Monday as a slow moving upper level trough slides east into Tuesday with surface westerly flow. Below normal temperatures, with showers and thunderstorms possible during this period. Conditions should become drier as surface high settles overhead Tuesday night. The high will move offshore on Wednesday and continue moving west into Thursday as flow becomes more southerly. Temperatures will be on the rise as dry conditions continue into Friday, when guidance suggest a boundary will bring showers and thunderstorms over our area. Aviation 19z Friday through Wednesday |
Vfr flight condition across the terminals this afternoon. There is an outside chance of a shower or tstm, but odds much too low for a TAF inclusion. A cold front, infused with tropical moisture, will cross the terminals tonight, most likely after midnight but before dawn. At this point, kept restrictions at MVFR. There is a decent potential of local brief ifr, probably due more to reduced vsbys in heavy rain. There may also be localized wind gusts. Where these gusts aren't realized, there is a 50-70 kt wind max several thousand feet off the deck, so low-level wind shear will be a concern. The front will be east of the terminals by Saturday morning.VFR conditions will prevail for the weekend. Mostly dryVFR conditions expected Monday into Wednesday as surface high pressure settles in. Some scattered showers and thunderstorms possible Monday afternoon into Tuesday as upper air disturbance moves through, which could cause periods of sub- vfr conditions. Marine Southwest winds 10-15 kt with some gusts to 20 kt. Those winds will be increasing ahead of a cold front tonight. Small craft advisories remain in effect. There will be a 50+ kt low level jet several thousand feet off the waters overnight. Do not believe this will mix down in the gradient flow, but local punches may near heavier showers. Marine warnings may be required tonight. Northwest flow Saturday will contain better mixing. The gradient will decease Saturday night. Have not extended the advisory further at this time. Mostly dry conditions expected Monday into Wednesday as surface high pressure settles in. Some scattered showers and thunderstorms possible Monday afternoon into Tuesday as upper air disturbance moves through. Winds gusts will be below the small craft advisory criteria. Hydrology As mentioned above, precip waters will be exceeding 2 inches, so heave rain expected in storms tonight. However, only 0 1 to 0.3 inches fell this morning, so soils were not saturated. Further, storms look to be progressive. So, while heavy rain expected, believe that the soil will be able to handle it overall, based on flash flood guidance. Thus, will not post any watches at this time. Local minor flooding is possible, especially in the potomac highlands. Tides coastal flooding Tides have started to spike, especially in the northern bay, where departures are now greater than a half foot above normal. The early morning tide cycle will be susceptible for minor flooding. Beyond that, northwest winds should lead to levels returning close to normal. Lwx watches warnings advisories Dc... None. Md... None. Va... None. Wv... None. Marine... Small craft advisory until 6 pm edt Saturday for anz530>543. Synopsis... Rcm near term... Hts short term... Hts long term... Imr aviation... Hts imr marine... Hts imr hydrology... Hts tides coastal flooding... Hts |
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 |
| CA2 - 8571892 - Cambridge, MD | 9 mi | 54 min | 85°F | 82°F | 1009.1 hPa (-0.9) | |||
| 44062 - Gooses Reef, MD | 16 mi | 44 min | WSW 7.8 G 9.7 | 82°F | 2 ft | 1008.8 hPa | ||
| TPLM2 - Thomas Point, MD | 21 mi | 54 min | SW 23 G 26 | 83°F | 78°F | |||
| COVM2 - 8577018 - Cove Point LNG Pier, MD | 22 mi | 54 min | WSW 11 G 15 | 84°F | 1008.8 hPa (-1.2) | |||
| 44063 - Annapolis | 24 mi | 44 min | WSW 18 G 23 | 84°F | 1 ft | 1006.8 hPa | ||
| CPVM2 | 25 mi | 54 min | 83°F | 74°F | ||||
| APAM2 - 8575512 - Annapolis, MD | 27 mi | 54 min | 88°F | 1006.4 hPa (-1.4) | ||||
| SLIM2 - 8577330 - Solomons Island, MD | 29 mi | 54 min | SW 13 G 19 | 84°F | 77°F | |||
| BSLM2 - Chesapeake Bay, MD | 29 mi | 144 min | SSW 8 | 82°F | 1008 hPa | 72°F | ||
| 44043 - Patapsco, MD | 35 mi | 44 min | SW 19 G 23 | 84°F | 2 ft | 1006.9 hPa | ||
| TCBM2 - 8573364 - Tolchester Beach, MD | 37 mi | 54 min | SSW 8.9 G 18 | 85°F | 82°F | 1006.6 hPa (-1.6) | ||
| FSNM2 | 42 mi | 54 min | SW 8.9 G 18 | 85°F | 1006.2 hPa (-1.8) | |||
| PPTM2 - 8578240 - Piney Point, MD | 42 mi | 54 min | W 6 G 8 | |||||
| FSKM2 - 8574728 - Francis Scott Key Bridge, MD | 42 mi | 54 min | SSW 19 G 22 | 85°F | 1005.4 hPa (-2.1) | |||
| 44042 - Potomac, MD | 46 mi | 44 min | WSW 14 G 18 | 84°F | 2 ft | 1007.5 hPa | ||
| BLTM2 - 8574680 - Baltimore, MD | 46 mi | 54 min | WSW 6 G 16 | 88°F | 82°F | 1005.4 hPa (-2.0) | ||
| 44061 - Upper Potomac, MD | 47 mi | 66 min | WSW 12 G 14 | 79°F | 82°F | 1008.5 hPa | ||
| WASD2 - 8594900 - Washington, DC | 47 mi | 54 min | SW 9.9 G 17 | 83°F | 83°F | 1006.8 hPa (-1.0) | ||
| DRSD1 - Delaware Reserve, DE | 48 mi | 99 min | SSW 9.9 | 87°F | 1007 hPa | 74°F |
Wind History for Cambridge, MD
(wind in knots) EDIT (on/off) Help| Last 24hr | ||||||||||||||||||||||||
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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 |
| Easton / Newman Field, MD | 10 mi | 66 min | SW 13 G 20 | 10.00 mi | Partly Cloudy | 86°F | 73°F | 66% | 1009.5 hPa |
| Cambridge-Dorchester Airport, MD | 12 mi | 64 min | SSW 8 | 10.00 mi | Fair | 84°F | 75°F | 74% | 1008.5 hPa |
| Bay Bridge Field, MD | 22 mi | 64 min | SSW 11 G 16 | 10.00 mi | Partly Cloudy | 86°F | 73°F | 66% | 1007.1 hPa |
Wind History from ESN (wind in knots)
| 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 | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | |
| Last 24hr | SW | SW | SW | Calm | Calm | SW | SW | SW | SW | SW | W | W | W | W | SW G16 | SW G17 | S | S | SW G17 | SW G20 | SW G22 | SW G20 | SW G20 | SW G20 |
| 1 day ago | SW | S | SW G14 | W | N G14 | NE | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | W | W | W | W | SW | W |
| 2 days ago | SW | SW G16 | SW G16 | SW G16 | SW | SW | SW | SW | SW | SW | SW | W | SW | SW | SW | W | W | W | SW | SW | S | SW | SW |
Tide / Current Tables for Oxford, Tred Avon River, Maryland
EDIT RT Ports Option Weekend mode (on/off) (on/off) Help One Week of Data| Oxford Click for Map Fri -- 03:27 AM EDT 2.79 feet High Tide Fri -- 05:22 AM EDT Moonrise Fri -- 05:40 AM EDT Sunrise Fri -- 11:03 AM EDT 0.48 feet Low Tide Fri -- 03:42 PM EDT 1.59 feet High Tide Fri -- 08:04 PM EDT Moonset Fri -- 08:33 PM EDT Sunset Fri -- 09:45 PM EDT 0.23 feet Low Tide Fri -- 10:32 PM EDT New Moon 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 |
| 1.3 | 2 | 2.5 | 2.8 | 2.8 | 2.5 | 2.2 | 1.7 | 1.3 | 0.9 | 0.6 | 0.5 | 0.6 | 0.9 | 1.3 | 1.5 | 1.6 | 1.4 | 1.1 | 0.8 | 0.5 | 0.3 | 0.2 | 0.4 |
Tide / Current Tables for Cove Point (1.1 mi. NE of), Maryland Current
EDIT (on/off) Help One Week of Data| Cove Point (1.1 mi. NE of) Click for Map Fri -- 02:11 AM EDT 0.95 knots Max Flood Fri -- 05:23 AM EDT Moonrise Fri -- 05:42 AM EDT Sunrise Fri -- 05:55 AM EDT -0.00 knots Slack Fri -- 09:21 AM EDT -0.82 knots Max Ebb Fri -- 12:48 PM EDT 0.00 knots Slack Fri -- 03:00 PM EDT 0.37 knots Max Flood Fri -- 05:37 PM EDT -0.00 knots Slack Fri -- 08:04 PM EDT Moonset Fri -- 08:32 PM EDT Sunset Fri -- 08:55 PM EDT -0.50 knots Max Ebb Fri -- 10:32 PM EDT New Moon Fri -- 11:28 PM EDT 0.00 knots Slack 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 |
| 0.5 | 0.8 | 0.9 | 0.9 | 0.7 | 0.3 | -0 | -0.4 | -0.7 | -0.8 | -0.8 | -0.6 | -0.3 | 0.1 | 0.3 | 0.4 | 0.3 | 0.1 | -0.1 | -0.3 | -0.4 | -0.5 | -0.4 | -0.2 |
Weather Map and Satellite Images
(on/off) HelpWeather Map | IR Satellite Image from GEOS GOES Local Image of Mid-Atlantic EDIT  |
Wind Forecast for Baltimore, MD/Washington (16,3,4,5)
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Ground Weather Radar Station Dover AFB, DE
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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. |