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Marine Weather and Tides
Version 3.4 |
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues. |
| Sunrise 5:38AM | Sunset 8:34PM | Thursday June 21, 2018 10:19 AM EDT (14:19 UTC) | Moonrise 1:21PM | Moonset 12:51AM | Illumination 57% |  |
Marine Forecasts
EDIT (on/off) Help| ANZ541 Choptank River To Cambridge Md And The Little Choptank River- 731 Am Edt Thu Jun 21 2018 .small craft advisory in effect from Friday morning through Friday evening... Today..N winds 5 kt. Waves less than 1 ft. Scattered showers, mainly this morning. Tonight..E winds 5 to 10 kt. Waves 1 ft. Scattered showers. Fri..E winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. Showers likely. Vsby 1 nm or less. Fri night..E winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. Showers likely. Sat..S winds 5 to 10 kt. Waves 1 ft. Showers likely. Sat night..SW winds 5 to 10 kt. Waves 1 ft. Scattered showers and tstms. Sun..W winds 5 to 10 kt. Waves 1 ft. A chance of tstms through the night. A chance of showers. Mon..NE winds 5 to 10 kt. Waves 1 to 2 ft. A chance of showers in the morning. Winds and waves higher and visibilities lower in and near tstms. | ANZ500 731 Am Edt Thu Jun 21 2018 Synopsis for the tidal potomac and md portion of the chesapeake bay.. A front will remain stalled over the mid-atlantic into Friday before returning slowly northward as a warm front through Saturday. Meanwhile, low pressure over the ohio valley will move into the eastern great lakes. This low will then move eastward across new england during the second half of the weekend bringing a cold front across the waters. A small craft advisory may be needed for a portion of the waters late Friday night into Saturday. |
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 211347 afdlwx area forecast discussion national weather service baltimore md washington dc 947 am edt Thu jun 21 2018 Synopsis A front will remain stalled over the mid-atlantic through tonight before slowly returning north as a warm front Friday into Saturday. Low pressure will move from the ohio valley to the eastern great lakes during this time, then eastward across new england Sunday bring a cold front across the region. High pressure will then build in from the eastern great lakes and remain in control through the middle of next week. Near term through tonight A weak cold front will pass through the metro areas late this morning early this afternoon and it is expected to stall out later this afternoon across central virginia into the potomac highlands. An isolated shower is possible with the frontal passage through midday. Farther south and west across central virginia into the potomac highlands, more widespread showers and thunderstorms are expected to develop this afternoon due to forcing from the boundary and moderate instability from a very warm and humid airmass in place. Thunderstorms will produce heavy rainfall later this afternoon across these areas. (see hydrology section for details on heavy rain threat flash flood watch). The forward (northeastward) progression of showers tonight may be hindered some, as the front should remain largely stalled due to easterly flow developing around high pressure departing off the new england coast. For this reason, sided with the somewhat slower NAM sref pops as opposed to the quicker gfs, which keeps coverage more scattered over much of maryland and the washington dc baltimore metro areas through much of the night. More heavy rain is expected across central virginia into the potomac highlands (closer to the stalled boundary). See hydrology section for more details. Short term Friday through Saturday night Rounds of showers and scattered thunderstorms are expected to re-invigorate and spread northeastward across virtually the entire mid-atlantic Friday afternoon into Friday night, before departing to the northeast Saturday morning along and ahead of the slowly advancing warm front. See the hydrology section for details on the heavy rain flooding threat. Hedging on the side of climatology, the warm front will likely get stuck near the potomac river Saturday, enhancing low-level directional shear. Speed shear increasing in the 0-6 km layer to around 50 knots with around 40 kts at 850 mb. This couple with abundant low-level moisture should lead to an environment favorable for scattered strong to severe storms and perhaps a couple supercells where best instability is pooled over southeastern parts of the cwa. Gusty winds or an isolated tornado would be possible in this scenario. SPC has southern maryland to the fredericksburg virginia area in a marginal risk, with uncertainties in more robust instability given poor lapse rates aloft. The warm front should lift further north by Saturday evening, with waning isentropic lift and diurnally decreasing instability leading to a decrease in convection overnight. Long term Sunday through Wednesday A broad area of low pressure will be moving through new england on Sunday. One boundary may be located just to our south, but the stronger cold front will be descending southward from the great lakes ahead of a sharper upper level trough. These features may result in some showers and thunderstorms during the afternoon and evening, but deep layer westerly flow may limit the coverage. Warm and moderately humid conditions will likely persist ahead of the front. While some ensemble members have a slower frontal progression through the area on Monday, the 00z deterministic models have it south of the area. In addition, the upper level trough axis vort max is now progged to be centered more over new england. Thus the forecast will trend cooler and drier. By Tuesday, there is good model agreement on high pressure building in from the northwest, resulting in dry weather and near to slightly below normal temperatures. The high will begin to move offshore Wednesday. Temperatures will begin to rebound, but precipitation chances will remain low. |
Aviation 14z Thursday through Monday MVFR CIGS are likely through midday across the northern terminals before eventually lifting towardVFR levels. An isolated shower is possible as well. More widespread showers and thunderstorms will develop near kcho later this afternoon and evening. Farther north and east, lighter rain is possible late this evening. Winds will generally be NE AOB 10 kts through tonight before increasing Friday with gusts around 20 kts possible. Showers accompanying restrictions also become more widespread late tonight through Friday night before diminishing early Saturday as winds become southwesterly in the wake of an advancing warm front. Scattered strong convection is possible Saturday afternoon, but predominatelyVFR is expected. Showers and thunderstorms will be possible Sunday afternoon and evening as a cold front moves toward the region.VFR conditions are expected Monday as the front moves to the south. Marine Sca posted Friday Friday evening in increasing easterly flow. Otherwise generally light winds expected outside of perhaps more isolated SW gusts Saturday. Isolated stronger convection could result in localized higher wind gusts Saturday afternoon and evening as well. West winds on Sunday will become northerly by Monday as a cold front pushes south through the waters. Wind speeds are still a bit uncertain at this time, but they could be near small craft advisory thresholds. Thunderstorms will also be possible ahead of the front Sunday afternoon and evening. Hydrology Pwats exceeding 2-2.25 inches by this evening over central virginia is quite concerning given potential repeated rounds of convection with a front stalled overhead. Also, 925-850 mb flow increases out of the east to 25-30 kts increasing moisture advection and resulting in an upslope component. Rainfall amounts by Friday morning will average 1 to 3 inches, with locally much higher amounts possible. A flash flood watch is in effect for central virginia into the potomac highlands later this afternoon through tonight. The heavy rain threat spreads further northeastward Friday afternoon and night as the warm front advances. Additional watches may be required. Tides coastal flooding Tidal anomalies have risen slightly to around a half foot, but should remain steady through today with light northerly wind. Afterward, easterly winds will develop and result in further rises. If the surge is quick, some sensitive locations may approach minor flood thresholds Friday night, although most guidance has peak anomalies and the highest chance of minor flooding Saturday night after winds turn southerly. A cold frontal passage will end the threat on Sunday. Lwx watches warnings advisories Dc... None. Md... None. Va... Flash flood watch from 3 pm edt this afternoon through late tonight for vaz025-026-029-036>040-050-051-503-504-507- 508. Wv... Flash flood watch from 3 pm edt this afternoon through late tonight for wvz505-506. Marine... Small craft advisory from 6 am Friday to midnight edt Friday night for anz530>543. Synopsis... Dhof near term... Bjl dhof short term... Dhof long term... Ads aviation... Bjl ads dhof marine... Bjl ads dhof hydrology... Dhof bjl tides coastal flooding... Dhof |
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 | 50 min | 80°F | 81°F | 1009 hPa | |||
| 44062 - Gooses Reef, MD | 16 mi | 40 min | NNW 3.9 G 3.9 | 76°F | 1010 hPa | |||
| TPLM2 - Thomas Point, MD | 21 mi | 80 min | W 5.1 G 5.1 | 73°F | 76°F | 1009.2 hPa (+0.9) | 71°F | |
| COVM2 - 8577018 - Cove Point LNG Pier, MD | 22 mi | 50 min | N 2.9 G 4.1 | 75°F | 1008.8 hPa | |||
| CPVM2 | 25 mi | 50 min | 75°F | 75°F | ||||
| 44063 - Annapolis | 25 mi | 40 min | NW 5.8 G 5.8 | 75°F | 1008.6 hPa | |||
| APAM2 - 8575512 - Annapolis, MD | 27 mi | 50 min | 77°F | 1007.8 hPa | ||||
| BSLM2 - Chesapeake Bay, MD | 29 mi | 110 min | Calm | 61°F | 1008 hPa | 60°F | ||
| SLIM2 - 8577330 - Solomons Island, MD | 29 mi | 50 min | WNW 2.9 G 6 | 77°F | 79°F | 1008 hPa | ||
| BISM2 - 8571421 - Bishops Head, MD | 33 mi | 50 min | WSW 7 G 9.9 | 76°F | 82°F | 1008.7 hPa | ||
| TCBM2 - 8573364 - Tolchester Beach, MD | 37 mi | 50 min | NNE 9.9 G 12 | 73°F | 78°F | 1008.6 hPa | ||
| PPTM2 - 8578240 - Piney Point, MD | 42 mi | 56 min | NNW 6 G 7 | |||||
| FSKM2 - 8574728 - Francis Scott Key Bridge, MD | 42 mi | 50 min | NNE 5.1 G 5.1 | 74°F | 1008.1 hPa | |||
| FSNM2 | 42 mi | 50 min | NNE 5.1 G 6 | 73°F | 1008.3 hPa | |||
| BLTM2 - 8574680 - Baltimore, MD | 46 mi | 56 min | NNE 4.1 G 6 | 75°F | 77°F | 1007.9 hPa | ||
| WASD2 - 8594900 - Washington, DC | 47 mi | 50 min | NW 2.9 G 5.1 | 80°F | 78°F | 1008.3 hPa | ||
| DRSD1 - Delaware Reserve, DE | 48 mi | 110 min | WNW 2.9 | 74°F | 1008 hPa | 74°F |
Wind History for Cambridge, MD
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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 | 90 min | NW 4 | 10.00 mi | Partly Cloudy | 77°F | 71°F | 83% | 1009.1 hPa |
| Cambridge-Dorchester Airport, MD | 12 mi | 45 min | Var 6 | 10.00 mi | Mostly Cloudy | 79°F | 73°F | 84% | 1008.1 hPa |
| Bay Bridge Field, MD | 22 mi | 45 min | NW 4 | 10.00 mi | Overcast | 75°F | 71°F | 89% | 1008.1 hPa |
Wind History from ESN (wind in knots)
| 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 | 10 AM | |
| Last 24hr | Calm | Calm | Calm | W | W | W | W | Calm | Calm | Calm | Calm | SW | SW | W | Calm | Calm | W | NW | Calm | Calm | Calm | Calm | NW | NW |
| 1 day ago | N | N | NE | N | N | N | N | N | N | Calm | N | Calm | Calm | Calm | Calm | N | N | NE | Calm | Calm | NE | Calm | Calm | Calm |
| 2 days ago | W | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | W | W | SW | W | W | W | NW |
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 Thu -- 01:50 AM EDT Moonset Thu -- 05:40 AM EDT Sunrise Thu -- 05:50 AM EDT 0.74 feet Low Tide Thu -- 10:58 AM EDT 1.88 feet High Tide Thu -- 02:20 PM EDT Moonrise Thu -- 05:55 PM EDT 0.41 feet Low Tide Thu -- 08:32 PM EDT Sunset 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 |
| 2 | 1.8 | 1.5 | 1.2 | 1 | 0.8 | 0.7 | 0.9 | 1.2 | 1.5 | 1.8 | 1.9 | 1.8 | 1.6 | 1.3 | 1 | 0.7 | 0.5 | 0.4 | 0.5 | 0.9 | 1.3 | 1.8 | 2.1 |
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 Thu -- 01:23 AM EDT -0.00 knots Slack Thu -- 01:51 AM EDT Moonset Thu -- 04:24 AM EDT -0.49 knots Max Ebb Thu -- 05:41 AM EDT Sunrise Thu -- 07:13 AM EDT 0.00 knots Slack Thu -- 09:49 AM EDT 0.41 knots Max Flood Thu -- 12:46 PM EDT -0.00 knots Slack Thu -- 02:21 PM EDT Moonrise Thu -- 04:26 PM EDT -0.60 knots Max Ebb Thu -- 07:21 PM EDT 0.00 knots Slack Thu -- 08:32 PM EDT Sunset Thu -- 10:35 PM EDT 0.70 knots Max Flood 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 |
| 0.3 | 0.1 | -0.1 | -0.4 | -0.5 | -0.5 | -0.3 | -0.1 | 0.2 | 0.4 | 0.4 | 0.3 | 0.2 | -0.1 | -0.3 | -0.5 | -0.6 | -0.6 | -0.4 | -0.1 | 0.2 | 0.5 | 0.7 | 0.7 |
Weather Map and Satellite Images
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GOES 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.
target = "new">Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for Baltimore, MD/Washington (10,2,3,4)
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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. |