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Marine Weather and Tides
Version 3.4 |
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it. 8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue. 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 7:19AM | Sunset 5:20PM | Saturday January 23, 2021 3:08 AM EST (08:08 UTC) | Moonrise 1:02PM | Moonset 2:51AM | Illumination 75% | ![]() |
ANZ535 Tidal Potomac From Key Bridge To Indian Head- 1240 Am Est Sat Jan 23 2021
.small craft advisory in effect through this evening...
Overnight..NW winds 10 kt with gusts to 20 kt. Waves 1 ft.
Sat..NW winds 10 to 15 kt. Gusts up to 30 kt. Waves 2 ft.
Sat night..NW winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
Sun..W winds 5 kt. Waves less than 1 ft.
Sun night..E winds around 5 kt. Waves 1 ft.
Mon..E winds around 5 kt. Waves 1 ft. Rain with a chance of snow.
Mon night..E winds 5 kt. Waves less than 1 ft. Rain and snow.
Tue..N winds 5 to 10 kt. Waves 1 ft. Rain and snow in the morning.
Wed..N winds 5 kt. Waves less than 1 ft. A chance of snow through the night.
.small craft advisory in effect through this evening...
Overnight..NW winds 10 kt with gusts to 20 kt. Waves 1 ft.
Sat..NW winds 10 to 15 kt. Gusts up to 30 kt. Waves 2 ft.
Sat night..NW winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
Sun..W winds 5 kt. Waves less than 1 ft.
Sun night..E winds around 5 kt. Waves 1 ft.
Mon..E winds around 5 kt. Waves 1 ft. Rain with a chance of snow.
Mon night..E winds 5 kt. Waves less than 1 ft. Rain and snow.
Tue..N winds 5 to 10 kt. Waves 1 ft. Rain and snow in the morning.
Wed..N winds 5 kt. Waves less than 1 ft. A chance of snow through the night.
ANZ500 1240 Am Est Sat Jan 23 2021
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure over the midwest will build eastward through the weekend. Low pressure may impact the region early next week. Small craft advisories will likely be needed for portions of the waters through the weekend. Small craft advisories may be needed Monday into Tuesday.
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure over the midwest will build eastward through the weekend. Low pressure may impact the region early next week. Small craft advisories will likely be needed for portions of the waters through the weekend. Small craft advisories may be needed Monday into Tuesday.
7 Day Forecast for Marine Location Near Forest Heights, MD
Hourly EDIT Help
location: 38.83, -77.03 debug
Area Discussion for - Baltimore, MD/Washington
  (on/off)  Help NOTE: mouseover dotted underlined text for definitionFXUS61 KLWX 230228 AFDLWX
Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 928 PM EST Fri Jan 22 2021
SYNOPSIS. High pressure will gradually build over the region tonight through Sunday morning, then move offshore Sunday night. Low pressure will pass through the area Tuesday. High pressure will return for Wednesday and the second half of next week.
NEAR TERM /THROUGH SATURDAY/. Colder temperatures but dry conditions will evolve throughout the weekend. Gusty winds Saturday will make it feel much colder than the actual temperatures. High pressure will be in control through the period. Highs Saturday will only reach the 30s in many places. A brisk northwest wind will make it feel like temperatures are in the teens and 20s. A few snow showers will be possible across the mountains, but these will be of little significance.
SHORT TERM /SATURDAY NIGHT THROUGH SUNDAY NIGHT/. Still chilly Saturday night with temperatures in the 20s or middle teens in the west. Less wind Sunday with high pressure in control and temperatures remaining chilly with high temperatures in the middle to upper 30s. Thickening clouds Sun night as moisture increases ahead of low pressure over the central Plains. Any precip through 12Z Mon should remain well west of I-81 and in the form of snow with any accumulations less than an inch.
LONG TERM /MONDAY THROUGH FRIDAY/. High pressure off to our southeast will continue to slide further offshore early Monday as low pressure emerges out of the south- central US. Guidance has come into better agreement over the last 24 hours in regards to the track of the system. Given a negative EPO, PNA, and NAO, the pattern is more inducive of a inside tracking system (northeastward along the Appalachians) which is now being modeled by all guidance members. The question now becomes the timing of the system which will help determine p-types. As of now, precip onset looks to occur Monday morning and continue into the evening/overnight hours.
Overall, guidance has been trending downward in terms of snow accumulations and continues to trend more towards a wintry mix type of event, especially at onset until a more southerly flow at the surface scours out any cold air trapped in the BL. With a good amount of uncertainty still remaining, it appears that (at this time) areas best suited for any winter weather will be along the Mason Dixon Line and into western Maryland and the eastern Panhandle of WV.
Tuesday appears to be more of a transition day, as showers are likely to continue throughout much of the day; albeit the bulk of the precip will have ended. Canadian high pressure returns for Wednesday, resulting in dry conditions. Another low pressure system may impact the region Thursday into Friday. However, the trend is for the system to remain more towards our south. However, confidence this far out remains low and will have to continue to monitor forecast trends over the next several days. General temperature trend in the long term period looks to remain slightly below normal for this time of year.
AVIATION /03Z SATURDAY THROUGH WEDNESDAY/. Blustery conditions Sat with a brisk northwest wind and gusting to 30 to 35 mph. Winds will diminish Sunday with increasing clouds Sun night with any precip likely to hold off until after 12Z Monday.
CIG/VSBY restrictions are likely, especially by Monday afternoon as low pressure spreads northward across the terminals. Restrictions are likely to continue through Tuesday as the low slowly exits the region. However there's a good chance that conditions improve late Tuesday into Wednesday.
MARINE. Strong SCA conditions Saturday into Saturday night with winds diminishing Sun afternoon.
SCA will be possible Monday and Tuesday as low pressure spreads eastward across the waters. SubSCA conditions possible on Wednesday.
LWX WATCHES/WARNINGS/ADVISORIES. DC . None. MD . None. VA . None. WV . None. MARINE . Small Craft Advisory until 6 AM EST Sunday for ANZ530>534- 537>543. Small Craft Advisory until 8 PM EST Saturday for ANZ535. Small Craft Advisory until 1 AM EST Sunday for ANZ536.
SYNOPSIS . LFR NEAR TERM . LFR/KLW SHORT TERM . KLW LONG TERM . MSS AVIATION . MSS/KLW MARINE . MSS/KLW
Weather Reporting Stations
EDIT (on/off)  Help NOTE: Click on distance to see the station location on a mapStations | Dist | Age | Wind | Air Temp | Water Temp | Waves | Pressure | DewPt |
WASD2 - 8594900 - Washington, DC | 3 mi | 50 min | WNW 6 G 11 | 38°F | 40°F | 1017.4 hPa | ||
BSLM2 - Chesapeake Bay, MD | 17 mi | 98 min | NW 6 | 37°F | 1016 hPa | 17°F | ||
APAM2 - 8575512 - Annapolis, MD | 31 mi | 50 min | WNW 11 G 13 | 38°F | 41°F | 1016.1 hPa | ||
TPLM2 - Thomas Point, MD | 32 mi | 68 min | W 8.9 G 11 | 38°F | 41°F | 1017.2 hPa (+0.9) | 19°F | |
NCDV2 | 35 mi | 56 min | NNW 5.1 G 7 | 36°F | 42°F | 1016 hPa | ||
CPVM2 | 36 mi | 50 min | 38°F | 22°F | ||||
44062 - Gooses Reef, MD | 38 mi | 44 min | NW 18 G 19 | 39°F | 41°F | 995.2 hPa | ||
FSKM2 - 8574728 - Francis Scott Key Bridge, MD | 38 mi | 50 min | WNW 18 G 20 | 37°F | 1016.4 hPa | |||
FSNM2 | 38 mi | 50 min | WNW 18 G 23 | 36°F | 1015.9 hPa | |||
BLTM2 - 8574680 - Baltimore, MD | 39 mi | 50 min | N 8 G 12 | 37°F | 42°F | 1016.4 hPa | ||
COVM2 - 8577018 - Cove Point LNG Pier, MD | 45 mi | 116 min | NNW 26 G 29 | 39°F | 1016 hPa | |||
SLIM2 - 8577330 - Solomons Island, MD | 47 mi | 50 min | NNW 8.9 G 13 | 38°F | 42°F | 1016 hPa | ||
TCBM2 - 8573364 - Tolchester Beach, MD | 49 mi | 50 min | NNW 18 G 20 | 37°F | 39°F | 1016.9 hPa |
Wind History for Washington, DC
(wind in knots) EDIT (on/off)  Help4 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 | 12 AM | 1 AM | 2 AM | 3 AM | |
Last 24hr | -- | SE | S | S | SE | S | SE | W | NW | NW G12 | NW G20 | NW G15 | NW G20 | NW G15 | NW G13 | N G15 | NW G15 | NW G9 | NW G15 | NW | NW G14 | NW G18 | NW G15 | NW G14 |
1 day ago | SE | S | SW | S | S | S | SW G10 | S | S | S | S | SW G14 | W G11 | SW G8 | NW | W | NW | -- | -- | -- | S | S | S G5 | E |
2 days ago | W | NW | NW G14 | NW G13 | NW G17 | NW G15 | W G17 | NW G16 | W G23 | NW G30 | NW G20 | NW G16 | N G11 | NW G13 | NW G5 | N G9 | N | NW | -- | -- | -- | S | 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 |
Washington/Reagan National Airport, DC, VA | 2 mi | 76 min | WNW 14 G 24 | 10.00 mi | A Few Clouds | 38°F | 14°F | 37% | 1016.8 hPa |
College Park Airport, MD | 12 mi | 73 min | NW 4 | 10.00 mi | Partly Cloudy | 36°F | 15°F | 42% | 1016.6 hPa |
Fort Meade / Tipton, MD | 23 mi | 73 min | NNW 6 | 10.00 mi | Overcast | 36°F | 21°F | 56% | 1017.3 hPa |
Gaithersburg - Montgomery County Airport, MD | 24 mi | 72 min | NW 7 | 10.00 mi | Overcast | 34°F | 17°F | 50% | 1018.3 hPa |
Washington/Dulles International Airport, DC, VA | 24 mi | 76 min | WNW 14 G 21 | 10.00 mi | Mostly Cloudy | 35°F | 14°F | 42% | 1016.6 hPa |
Link to 5 minute data for KDCA
Wind History from DCA (wind in knots)
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 | 12 AM | 1 AM | 2 AM | 3 AM | |
Last 24hr | S | S | S | S | SW | S | SE | W | NW G17 | W G23 | NW G21 | NW G22 | NW G24 | NW G27 | NW | NW G21 | NW G20 | NW | NW G25 | N | NW G21 | NW | NW G24 | NW |
1 day ago | S | S | SW | S | S | S | SW | S | S | S | S | S | SW | W | W | W | W | W | Calm | S | S | SW | SW | SW |
2 days ago | Calm | N | SW | NW G21 | NW G23 | NW G15 | NW | W G20 | NW G24 | W G31 | NW G42 | W G27 | NW G22 | NW | NW | NW | N | N | NW | NW | E | SW | SW | SE |
Tide / Current Tables for Bellevue, D.C.
EDIT Weekend mode (on/off) (on/off)  Help One Week of DataBellevue
Click for Map
Sat -- 02:51 AM EST Moonset
Sat -- 04:04 AM EST 2.24 feet High Tide
Sat -- 07:20 AM EST Sunrise
Sat -- 09:50 AM EST 0.04 feet Low Tide
Sat -- 01:01 PM EST Moonrise
Sat -- 04:17 PM EST 2.58 feet High Tide
Sat -- 05:19 PM EST Sunset
Sat -- 11:07 PM EST 0.13 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sat -- 02:51 AM EST Moonset
Sat -- 04:04 AM EST 2.24 feet High Tide
Sat -- 07:20 AM EST Sunrise
Sat -- 09:50 AM EST 0.04 feet Low Tide
Sat -- 01:01 PM EST Moonrise
Sat -- 04:17 PM EST 2.58 feet High Tide
Sat -- 05:19 PM EST Sunset
Sat -- 11:07 PM EST 0.13 feet Low Tide
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 |
0.7 | 1.3 | 1.8 | 2.1 | 2.2 | 2.1 | 1.6 | 1 | 0.4 | 0.1 | 0 | 0.2 | 0.7 | 1.4 | 2 | 2.4 | 2.6 | 2.5 | 2.1 | 1.6 | 1 | 0.6 | 0.3 | 0.1 |
Tide / Current Tables for Benning Bridge, D.C.
EDIT (on/off)  Help One Week of DataBenning Bridge
Click for Map
Sat -- 02:51 AM EST Moonset
Sat -- 04:19 AM EST 2.32 feet High Tide
Sat -- 07:20 AM EST Sunrise
Sat -- 10:04 AM EST 0.04 feet Low Tide
Sat -- 01:00 PM EST Moonrise
Sat -- 04:32 PM EST 2.68 feet High Tide
Sat -- 05:19 PM EST Sunset
Sat -- 11:21 PM EST 0.14 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sat -- 02:51 AM EST Moonset
Sat -- 04:19 AM EST 2.32 feet High Tide
Sat -- 07:20 AM EST Sunrise
Sat -- 10:04 AM EST 0.04 feet Low Tide
Sat -- 01:00 PM EST Moonrise
Sat -- 04:32 PM EST 2.68 feet High Tide
Sat -- 05:19 PM EST Sunset
Sat -- 11:21 PM EST 0.14 feet Low Tide
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 |
0.6 | 1.2 | 1.7 | 2.1 | 2.3 | 2.2 | 1.8 | 1.2 | 0.6 | 0.2 | 0 | 0.1 | 0.5 | 1.2 | 1.9 | 2.4 | 2.6 | 2.6 | 2.3 | 1.8 | 1.2 | 0.7 | 0.4 | 0.2 |
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
Ground Weather Radar Station
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