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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 5:50AM | Sunset 8:35PM | Thursday July 9, 2020 7:49 AM EDT (11:49 UTC) | Moonrise 10:45PM | Moonset 9:09AM | Illumination 84% |  |
ANZ542 Patuxent River To Broomes Island Md- 736 Am Edt Thu Jul 9 2020
.small craft advisory in effect from 6 pm edt this evening through Friday afternoon...
Today..E winds 10 kt. Waves 1 ft. Scattered showers with isolated tstms this afternoon.
Tonight..NE winds 10 to 15 kt. Gusts up to 20 kt. Waves 1 ft. A chance of showers. Vsby 1 nm or less.
Fri..N winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft. Showers likely. Vsby 1 nm or less.
Fri night..W winds 5 to 10 kt. Waves 1 ft. A chance of showers.
Sat..SW winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance of tstms.
Sat night..SW winds 5 kt. Waves less than 1 ft. A chance of showers and tstms.
Sun..SW winds 5 kt. Waves less than 1 ft. A chance of showers and tstms.
Mon..SW winds 5 to 10 kt. Waves 1 ft. A chance of tstms. A chance of showers. Winds and waves higher and visibilities lower in and near tstms.
.small craft advisory in effect from 6 pm edt this evening through Friday afternoon...
Today..E winds 10 kt. Waves 1 ft. Scattered showers with isolated tstms this afternoon.
Tonight..NE winds 10 to 15 kt. Gusts up to 20 kt. Waves 1 ft. A chance of showers. Vsby 1 nm or less.
Fri..N winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft. Showers likely. Vsby 1 nm or less.
Fri night..W winds 5 to 10 kt. Waves 1 ft. A chance of showers.
Sat..SW winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance of tstms.
Sat night..SW winds 5 kt. Waves less than 1 ft. A chance of showers and tstms.
Sun..SW winds 5 kt. Waves less than 1 ft. A chance of showers and tstms.
Mon..SW winds 5 to 10 kt. Waves 1 ft. A chance of tstms. A chance of showers. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 736 Am Edt Thu Jul 9 2020
Synopsis for the tidal potomac and md portion of the chesapeake bay.. Low pressure along the north carolina coast will lift northward through tonight, moving near or just east of the delmarva peninsula on Friday, lifting to our northeast Friday night. A cold front is poised to encroach on the waters late Saturday into Sunday, lingering nearby into early next week. Gale force wind gusts may be possible over portions of the waters early Friday morning, potentially requiring the need for a gale warning during this time.
Synopsis for the tidal potomac and md portion of the chesapeake bay.. Low pressure along the north carolina coast will lift northward through tonight, moving near or just east of the delmarva peninsula on Friday, lifting to our northeast Friday night. A cold front is poised to encroach on the waters late Saturday into Sunday, lingering nearby into early next week. Gale force wind gusts may be possible over portions of the waters early Friday morning, potentially requiring the need for a gale warning during this time.
7 Day Forecast for Marine Location Near Leonard, MD
Hourly EDIT Helplocation: 38.28, -76.63 debug
Area Discussion for - Baltimore, MD/Washington
(on/off) Help NOTE: mouseover dotted underlined text for definitionFXUS61 KLWX 090747 AFDLWX
Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 347 AM EDT Thu Jul 9 2020
SYNOPSIS. Low pressure will slowly move up the Mid-Atlantic Coast through Friday before moving off to the northeast Friday night. The low may develop tropical characteristics during this time so this will have to be monitored. An upper-level trough will build overhead Saturday while a cold front passes through the area. The upper-level trough will hang around for early next week.
NEAR TERM /THROUGH TONIGHT/. Areas of low clouds and fog are expected through early this morning as low-level moisture is trapped underneath the nocturnal inversion. This should mix out by mid-morning for most areas.
Low pressure off the North Carolina coast will slowly drift northward up the Mid-Atlantic Coast through tonight. Upper-level high pressure overhead this morning will build northeast into upstate New York and New England during this time. This upper- level high should remain close enough for today so that many location end up dry with sunshine. The exceptions will be along the Allegheny Highlands where an isolated storm is possible (even there most of the time will be dry and most areas will be dry), and across the Virginia Piedmont into southern Maryland where deeper moisture closer to the low may result in a few popup showers and perhaps an isolated storm. Subsidence from the upper-level high along with an onshore flow means more hot and humid conditions with highs in the upper 80s to lower 90s for most locations.
The low will continue to move northward tonight, and there is still some uncertainty as to how quickly the low moves north. The 00Z ECMWF is a little slower than the 00z GFS. If the faster solution is realized, then rain may overspread eastern areas (near and southeast of I-95) overnight, but if the slower solution is realized then the rain would hold off for most of the night. Left chance pops for now for areas near and east of I-95, but did continue with likely pops across extreme southern MD into the Tangier Sound. The forecast leans a little toward the slower solution given the current satellite imagery which shows that the deeper convection is displaced from the circulation. With low topped convection near the circulation, it may take longer for the system to speed up in its track to the north.
SHORT TERM /FRIDAY THROUGH SATURDAY NIGHT/. The low will continue to move up the Mid-Atlantic Coast Friday before moving away from the area Friday night. Did lean slightly toward the guidance with the slower solution for reasons mentioned in the paragraph above. This would likely bring showers and perhaps a thunderstorm to locations east of the Blue Ridge Mountains. A more potent upper-level trough axis will approach from the west Friday afternoon and this may trigger a few showers and thunderstorms around the Potomac Highlands and Shenandoah Valley.
Will have to continue to monitor this system because it may develop tropical characteristics, and there is still some model divergence as far as how heavy the rain will be and where it will be. It does appear more likely that the heaviest rain should remain to our east at this time though.
Drier conditions will likely return Friday night as the low moves away from the area. Still could see a few showers and perhaps a thunderstorm over the Potomac Highlands in response to the upper-level trough moving in from the west.
The upper-level trough will build overhead Saturday while a cold front slowly passes through the area later Saturday into Saturday night. This will bring the likelihood for showers and scattered thunderstorms. Some storms may be strong due to higher amounts of instability and increasing shear profiles. Convection should diminish later Saturday night with the loss of daytime heating.
LONG TERM /SUNDAY THROUGH WEDNESDAY/. Longwave trough will reside over the eastern U.S. Sunday, with our CWA situated between two embedded shortwave troughs. With a frontal boundary lingering to our south and east, and hot and humid conditions persisting, diurnal showers and thunderstorms will be possible Sunday afternoon. Do think the best coverage (chance POPs) will be relegated to our mountain zones where terrain circulations aid in development.
The secondary shortwave and primary trough axis will look to shift through the area on Monday, with the best lift remaining to our north. Will carry climo POPs with diurnally favored showers and thunderstorms Monday afternoon and early evening. Thereafter, heights are progged to rise as high pressure begins to take reigns over the region. This will result in a mainly dry forecast as we head into the middle portion of next week, but can't rule out an afternoon isolated shower or storm. With high pressure in control next week, above normal temperatures and elevated humidity will be sticking around.
AVIATION /07Z THURSDAY THROUGH MONDAY/. Areas of low clouds and fog are expected early this morning and IFR conditions are possible, especially across the eastern terminals. Any low clouds and fog should burn off by mid- morning.
Low pressure will move up the Mid-Atlantic Coast through Friday before moving off to the northeast Friday night. Showers and perhaps a thunderstorm are possible, especially Friday across the eastern terminals. Also, subVFR cigs from low clouds are likely late tonight into Friday morning due to an easterly flow from the Atlantic.
The low will move away from the area Friday night, but patchy low clouds and fog are possible. There is a better chance for stronger thunderstorms Saturday afternoon and evening as a cold front passes through the terminals.
Predominate VFR conditions expected Sunday through Monday as a light westerly flow prevails. Afternoon/evening showers and storms may bring brief episodes of sub VFR VIS/CIGs, but much of the period will feature VFR.
MARINE. Low pressure will slowly move up the Mid-Atlantic Coast through Friday before moving off to the northeast Friday night. An increasing gradient will gradually cause northeast winds to increase tonight into Friday before turning toward the north and eventually northwest Friday night. An SCA is in effect for the bay and lower Tidal Potomac during this time. The strongest winds are most likely late tonight through midday Friday with gusts around 30 knots possible south of Drum Point. The SCA may need to be extended in area to include the upper Tidal Potomac River, but confidence is too low at this time due to uncertainties with the track and strength of the low.
Will have to continue to monitor the low, because it may develop tropical characteristics and there is still some uncertainty in regards to its exact track.
A cold front will pass through the waters later Saturday into Saturday night. A few stronger storms are possible Saturday afternoon and evening.
Light westerly breezes will maintain sub SCA conditions over the waters the second half of the weekend and into early next week. Diurnally driven showers and thunderstorms could pose a gusty wind threat, but given the synoptic features at play, coverage looks to be isolated to scattered at best over the waters.
TIDES/COASTAL FLOODING. Light east southeast winds early this morning is leading to elevated tidal anomalies across our waters. However, the threat for minor tidal flooding currently exists only at Annapolis and DC SW Waterfront this morning, with many other sites expected to hold in action stage. Anomalies have trending downward a touch the last couple of hours at Annapolis, likely a result of the lighter winds. So the issuance of an Advisory will be a game time decision (8-9z) as our current forecast just exceeds minor flood stage during high tide this morning around 9am. High tide at DC is late in the morning, and with a current forecast just touching minor flood, will monitor trends early this morning before making a decision there.
Easterly winds are expected to increase later today and persist tonight into early Friday morning as low pressure tracks up the Mid- Atlantic coast. This will bring a continued threat for minor tidal flooding through the high tide cycle Friday morning, with the threat subsiding thereafter as northerly flow emerges.
LWX WATCHES/WARNINGS/ADVISORIES. DC . None. MD . None. VA . None. WV . None. MARINE . Small Craft Advisory from 6 AM to 6 PM EDT Friday for ANZ530- 531-538-539. Small Craft Advisory from 6 PM this evening to 6 PM EDT Friday for ANZ532>534-537-540>543.
SYNOPSIS . BJL NEAR TERM . BJL SHORT TERM . BJL LONG TERM . BKF AVIATION . BJL/BKF MARINE . BJL/BKF TIDES/COASTAL FLOODING . BKF
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 |
| SLIM2 - 8577330 - Solomons Island, MD | 10 mi | 56 min | E 8 G 9.9 | 78°F | 81°F | 1014.1 hPa | ||
| PPTM2 - 8578240 - Piney Point, MD | 11 mi | 56 min | ENE 4.1 G 7 | |||||
| COVM2 - 8577018 - Cove Point LNG Pier, MD | 15 mi | 56 min | E 8 G 8.9 | 1014.9 hPa | ||||
| 44062 - Gooses Reef, MD | 22 mi | 32 min | ESE 7.8 G 9.7 | 77°F | 82°F | |||
| LWTV2 - 8635750 - Lewisetta, VA | 22 mi | 56 min | ESE 8.9 G 9.9 | 79°F | 81°F | 1014 hPa | ||
| NCDV2 | 22 mi | 56 min | ENE 1 G 2.9 | 76°F | 84°F | 1013.6 hPa | ||
| BISM2 - 8571421 - Bishops Head, MD | 32 mi | 56 min | ESE 7 G 8 | 78°F | 83°F | 1014.2 hPa | ||
| BSLM2 - Chesapeake Bay, MD | 35 mi | 140 min | Calm | 1013 hPa | ||||
| CA2 - 8571892 - Cambridge, MD | 36 mi | 56 min | E 7 G 9.9 | 76°F | 83°F | 1014.8 hPa | ||
| TPLM2 - Thomas Point, MD | 44 mi | 50 min | E 7 G 8 | 76°F | 80°F | 1016 hPa (+1.1) | 76°F | |
| WASD2 - 8594900 - Washington, DC | 46 mi | 56 min | ESE 1.9 G 4.1 | 77°F | 86°F | 1015 hPa | ||
| APAM2 - 8575512 - Annapolis, MD | 49 mi | 56 min | ESE 5.1 G 6 | 79°F | 83°F | 1014.6 hPa |
Wind History for Solomons Island, MD
(wind in knots) EDIT (on/off) Help| 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 | 6 AM | 7 AM | |
| Last 24hr | S | E | SE | SE | E | SE | SE G12 | SE G11 | SE | SE G12 | SE | SE | SE | S | S | SE | SE | S | S | E | E | E | NE | E |
| 1 day ago | S | -- | NE | E | E | E | SE | SE G16 | SE | SE G16 | SE | S | SE G16 | S G13 | SE | S | S G9 | SE | S | SE | S | S | SE | S |
| 2 days ago | SW | S | W | SW | S | SW | S | SW G15 | S | SW G13 | SW | S | S | S | E | E G22 | NE G28 | E G20 | SE G12 | SE | N | NW G11 | SW | SE |
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 |
| St Marys County Airport, MD | 5 mi | 55 min | N 0 | 10.00 mi | Partly Cloudy | 73°F | 71°F | 94% | 1014.9 hPa |
| Patuxent River, Naval Air Station, MD | 12 mi | 2 hrs | E 6 | 10.00 mi | Partly Cloudy | 78°F | 75°F | 90% | 1013.9 hPa |
| St. Inigoes, Webster Field, Naval Electronic Systems Engineering Activity, MD | 14 mi | 1.9 hrs | ENE 3 | 10.00 mi | Fair | 77°F | 73°F | 88% | 1013.6 hPa |
Link to 5 minute data for K2W6
Wind History from 2W6 (wind in knots)
| 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 | 6 AM | 7 AM | 8 AM | |
| Last 24hr | Calm | SE | Calm | SE | E | E | SE | SE | SE | SE | SE | SE | SE | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm |
| 1 day ago | SE | SE | SE | SE | SE | SE | SE | SE | SE | SE | Calm | Calm | Calm | Calm | Calm | SE | ||||||||
| 2 days ago |
Tide / Current Tables for Leonardtown, Breton Bay, Maryland
EDIT Weekend mode (on/off) (on/off) Help One Week of DataLeonardtown
Click for Map
Thu -- 05:51 AM EDT Sunrise
Thu -- 06:03 AM EDT 1.93 feet High Tide
Thu -- 10:09 AM EDT Moonset
Thu -- 12:32 PM EDT 0.17 feet Low Tide
Thu -- 06:39 PM EDT 1.83 feet High Tide
Thu -- 08:31 PM EDT Sunset
Thu -- 11:45 PM EDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Thu -- 05:51 AM EDT Sunrise
Thu -- 06:03 AM EDT 1.93 feet High Tide
Thu -- 10:09 AM EDT Moonset
Thu -- 12:32 PM EDT 0.17 feet Low Tide
Thu -- 06:39 PM EDT 1.83 feet High Tide
Thu -- 08:31 PM EDT Sunset
Thu -- 11:45 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 |
| 0.2 | 0.4 | 0.7 | 1.2 | 1.6 | 1.8 | 1.9 | 1.8 | 1.5 | 1.1 | 0.7 | 0.4 | 0.2 | 0.2 | 0.4 | 0.9 | 1.3 | 1.6 | 1.8 | 1.8 | 1.6 | 1.2 | 0.8 | 0.5 |
Tide / Current Tables for Point Patience, 0.1 mile southwest of, Maryland Current
EDIT (on/off) Help One Week of DataPoint Patience
Click for MapFlood direction 315° true
Ebb direction 145° true
Thu -- 12:15 AM EDT 0.00 knots Slack
Thu -- 02:37 AM EDT 0.53 knots Max Flood
Thu -- 05:14 AM EDT -0.00 knots Slack
Thu -- 05:50 AM EDT Sunrise
Thu -- 09:24 AM EDT -0.99 knots Max Ebb
Thu -- 10:08 AM EDT Moonset
Thu -- 01:50 PM EDT 0.00 knots Slack
Thu -- 03:40 PM EDT 0.42 knots Max Flood
Thu -- 06:17 PM EDT -0.00 knots Slack
Thu -- 08:31 PM EDT Sunset
Thu -- 09:42 PM EDT -0.51 knots Max Ebb
Thu -- 11:44 PM EDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Click for MapFlood direction 315° true
Ebb direction 145° true
Thu -- 12:15 AM EDT 0.00 knots Slack
Thu -- 02:37 AM EDT 0.53 knots Max Flood
Thu -- 05:14 AM EDT -0.00 knots Slack
Thu -- 05:50 AM EDT Sunrise
Thu -- 09:24 AM EDT -0.99 knots Max Ebb
Thu -- 10:08 AM EDT Moonset
Thu -- 01:50 PM EDT 0.00 knots Slack
Thu -- 03:40 PM EDT 0.42 knots Max Flood
Thu -- 06:17 PM EDT -0.00 knots Slack
Thu -- 08:31 PM EDT Sunset
Thu -- 09:42 PM EDT -0.51 knots Max Ebb
Thu -- 11:44 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 |
| -0.1 | 0.2 | 0.5 | 0.5 | 0.4 | 0.1 | -0.3 | -0.6 | -0.9 | -1 | -1 | -0.8 | -0.6 | -0.3 | 0.1 | 0.4 | 0.4 | 0.3 | 0.1 | -0.2 | -0.4 | -0.5 | -0.5 | -0.4 |
Weather Map
(on/off) Help Weather Map
GEOS Local Image of 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 Baltimore, MD/Washington (7,2,3,4)
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Ground Weather Radar Station Dover AFB, DE
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