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Marine Weather and Tides
Version 3.4 |
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. 6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen |
Sunrise 7:09AM | Sunset 4:45PM | Saturday December 7, 2019 4:05 AM EST (09:05 UTC) | Moonrise 2:22PM | Moonset 2:22AM | Illumination 79% | ![]() |
ANZ532 Chesapeake Bay From Sandy Point To North Beach- 338 Am Est Sat Dec 7 2019
.small craft advisory in effect until 6 am est early this morning...
Rest of the overnight..N winds 15 kt with gusts to 20 kt. Waves 2 ft.
Today..N winds 5 to 10 kt. Waves 1 to 2 ft.
Tonight..E winds 5 kt. Waves less than 1 ft.
Sun..SE winds 5 to 10 kt. Waves 1 ft.
Sun night..S winds 5 to 10 kt. Waves 1 ft. A chance of showers.
Mon..S winds 5 to 10 kt. Waves 1 ft. Rain.
Mon night..SW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. Rain likely.
Tue..SW winds 10 to 15 kt...becoming nw. Waves 2 ft. Showers.
Wed..NW winds 10 to 15 kt. Waves 1 ft. A chance of showers through the day.
.small craft advisory in effect until 6 am est early this morning...
Rest of the overnight..N winds 15 kt with gusts to 20 kt. Waves 2 ft.
Today..N winds 5 to 10 kt. Waves 1 to 2 ft.
Tonight..E winds 5 kt. Waves less than 1 ft.
Sun..SE winds 5 to 10 kt. Waves 1 ft.
Sun night..S winds 5 to 10 kt. Waves 1 ft. A chance of showers.
Mon..S winds 5 to 10 kt. Waves 1 ft. Rain.
Mon night..SW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. Rain likely.
Tue..SW winds 10 to 15 kt...becoming nw. Waves 2 ft. Showers.
Wed..NW winds 10 to 15 kt. Waves 1 ft. A chance of showers through the day.
ANZ500 338 Am Est Sat Dec 7 2019
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will build across the region through the weekend. A strong area of low pressure will then develop over the mid- mississippi valley and track northeastward toward the eastern great lakes early next week. Small craft advisories may be needed Monday night through Tuesday.
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will build across the region through the weekend. A strong area of low pressure will then develop over the mid- mississippi valley and track northeastward toward the eastern great lakes early next week. Small craft advisories may be needed Monday night through Tuesday.
7 Day Forecast for Marine Location Near Highland Beach town, MD
Hourly EDIT Helplocation: 38.93, -76.45 debug
Area Discussion for - Baltimore, MD/Washington
  (on/off)  Help NOTE: mouseover dotted underlined text for definitionFXUS61 KLWX 070259 AFDLWX
Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 959 PM EST Fri Dec 6 2019
SYNOPSIS. A cold front will cross the area this evening. High pressure will build in from the west this weekend, before a stronger area of low pressure develops over the Mid-Mississippi Valley and tracks northeastward toward the eastern Great Lakes early next week.
NEAR TERM /UNTIL 7 AM SATURDAY MORNING/.
The rain showers have moved out of our region with some mid to high level clouds remaining. A cold front located through West Virginia, Northern Virginia and Northern Maryland will progress through out region this evening. Winds will becoming northerly and skies will slowly clear. Overnight low temperatures will depend on when the skies fully clear and the winds become light. If the cloud shield moves through our region quicker than expected, the boundary layer decoupling will occur earlier allowing temperatures to cool much quicker than currently forecast. Since the cloud shield is taking awhile to fully move through our region, I have upped overnight lows slightly especially since winds may not go calm until closer to daybreak. Isolated Rain and snow showers can't be ruled out along the Allegheny frontal range due to orographic lift and a cold front move through the area. Overall no more than inch of snow is expected at the higher elevations.
SHORT TERM /7 AM SATURDAY MORNING THROUGH SUNDAY NIGHT/. A strong area of high pressure will build in from the Ohio Valley on Saturday, leading to sunny skies areawide. Temperatures will run below normal in the cool air mass behind today's cold frontal passage, with highs maxing out in the upper 30s to mid 40s.
The high will become centered overhead Saturday evening, setting the stage for an ideal radiational cooling night. With clear skies, near calm winds, and dewpoints in the upper teens to low 20s, temperatures should drop rapidly. Have adjusted temperatures down from previous forecasts to account for this radiational cooling scenario.
The high will shift offshore on Sunday, causing winds to switch around to southerly. Skies should start off sunny, but some high clouds may stream in during the late afternoon hours, well in advance of a system located over the center of the country. Highs on Sunday will run a few degrees warmer than Saturday, with max temps primarily in the 40s.
Clouds will continue to stream in Sunday Night in advance of a digging trough over the center of the country. As a push of warm advection ensues ahead of that system, showers may develop across the area late Sunday Night.
LONG TERM /MONDAY THROUGH FRIDAY/. High pressure will remain well offshore while low pressure tracks northeast into the Great Lakes Monday and then into southeastern Canada for Tuesday. A warm front will slowly pass through the area later Monday into Tuesday and the cold front associated with the low will pass through the area late Tuesday into Tuesday night. A deep southerly flow will allow for milder conditions Monday and Tuesday, although cold air damming may keep temps closer to normal Monday (north of the warm front). The deep southerly flow will also usher in copious amounts of moisture during this time. The deeper moisture combined with lift from a strengthening low-level jet and upper-level jet should provide enough moisture and lift for rain Monday. Showers are likely Monday night and Tuesday ahead of the cold front.
The cold front will likely pass through the area Tuesday evening. An upper-level trough will pass through the area behind the boundary Tuesday night, and Canadian high pressure will build overhead for Wednesday and Thursday.
There may be just enough upper-level support for some precipitation on the cold side of the boundary Tuesday night. If so, there is a potential for some snow to mix in before precipitation ends. However, confidence is very low since most of the energy is in the northern stream, and the axis of the trough remains positive to perhaps neutrally tilted. Will continue to monitor.
For Wednesday, blustery and much colder conditions are expected. There will be some snow showers along and west of the Allegheny Front, and it is not out of the question that some of those snow showers can spill east of the mountains. At this time, it appears that the westerly flow at the low-levels should keep that threat limited. Canadian high pressure will build overhead Wednesday night and Thursday, bringing dry and cold conditions. The high will move offshore late in the week, allowing for a moderating trend.
AVIATION /03Z SATURDAY THROUGH WEDNESDAY/. Mid to high level clouds are expected this evening for all terminals. Some cloud bases cloud briefly drop down near MVFR conditions especially for the MRB terminal. Any restrictions would be very brief and VFR conditions are expected. This shield of clouds should dissipate early on Saturday as a cold front progresses through our region. Winds shift from westerly and become northwesterly through the rest of the night. Periods of gusts upwards of 15 to 20 knots could be potential as the cold front moves through the area.
High pressure will build in for the weekend, bringing clear skies and light winds. The next chance for sub-VFR conditions will be late Sunday Night as lower ceilings and showers move in ahead of an approaching system located over the center of the country.
Rain and subVFR conditions are expected Monday and Tuesday ahead of a cold front. Gusty west to northwest winds are expected behind the cold front Tuesday night and Wednesday. The rain may mix with some snow before ending Tuesday night, but confidence is very low at this time.
MARINE. Small Craft Advisories are in effect for all of the waters this through Saturday morning. A surge of winds are expected to occur over the waters in the next few hours with another surge possible in the morning as the sun rises. Winds will start diminishing from north to south through Saturday morning as high pressure builds.
Light winds expected Saturday afternoon through Sunday with high pressure in control. Southerly flow may increase a bit Sunday night as the high departs, but looks to be sub-SCA at this time.
Low pressure will pass by well to the west Monday. A southerly flow will increase as a warm front moves through the waters later Monday into early Tuesday. An SCA may be needed for portions of the waters during this time. A cold front will approach from the west Tuesday before passing through Tuesday night. High pressure will approach Wednesday. An SCA will likely be needed for the waters during this time.
LWX WATCHES/WARNINGS/ADVISORIES. DC . None. MD . None. VA . None. WV . None. MARINE . Small Craft Advisory until 6 AM EST Saturday for ANZ531-532- 538>540. Small Craft Advisory until noon EST Saturday for ANZ533-534- 537-541>543. Small Craft Advisory until 2 AM EST Saturday for ANZ530-535- 536.
SYNOPSIS . KJP NEAR TERM . KJP/JMG SHORT TERM . KJP LONG TERM . BJL AVIATION . BJL/KJP/JMG MARINE . BJL/KJP/JMG
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 |
TPLM2 - Thomas Point, MD | 2 mi | 65 min | NW 16 G 17 | 42°F | 46°F | 1025.7 hPa (+2.8) | 24°F | |
44063 - Annapolis | 2 mi | 29 min | N 12 G 14 | 40°F | 46°F | 1025.9 hPa | ||
APAM2 - 8575512 - Annapolis, MD | 4 mi | 47 min | 41°F | 1024.8 hPa | ||||
CPVM2 | 6 mi | 47 min | 42°F | 33°F | ||||
BSLM2 - Chesapeake Bay, MD | 17 mi | 155 min | NNW 8 | 45°F | 1023 hPa | 29°F | ||
FSKM2 - 8574728 - Francis Scott Key Bridge, MD | 20 mi | 47 min | NNW 13 G 15 | 40°F | 1025.4 hPa | |||
TCBM2 - 8573364 - Tolchester Beach, MD | 22 mi | 53 min | NNW 17 G 19 | 41°F | 43°F | 1025.5 hPa | ||
BLTM2 - 8574680 - Baltimore, MD | 24 mi | 53 min | N 6 G 8 | 40°F | 49°F | 1025.1 hPa | ||
44062 - Gooses Reef, MD | 26 mi | 29 min | N 19 G 21 | 43°F | 1025.6 hPa | |||
WASD2 - 8594900 - Washington, DC | 31 mi | 47 min | N 6 G 9.9 | 41°F | 44°F | 1025.9 hPa | ||
CA2 - 8571892 - Cambridge, MD | 32 mi | 53 min | NNW 19 G 22 | 44°F | 44°F | 1024.2 hPa | ||
SLIM2 - 8577330 - Solomons Island, MD | 42 mi | 47 min | N 9.9 G 13 | 44°F | 48°F | 1024.4 hPa |
Wind History for Francis Scott Key Bridge NE Tower, MD
(wind in knots) EDIT (on/off)  HelpLast 24hr | ||||||||||||||||||||||||
1 day ago | ||||||||||||||||||||||||
2 days ago |
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 |
Annapolis, United States Naval Academy, MD | 4 mi | 71 min | NNW 9 | 10.00 mi | Fair | 42°F | 26°F | 53% | 1025.1 hPa |
Bay Bridge Field, MD | 7 mi | 70 min | N 10 | 10.00 mi | Fair | 41°F | 24°F | 53% | 1025.1 hPa |
Fort Meade / Tipton, MD | 20 mi | 71 min | NNW 4 | 10.00 mi | Fair | 34°F | 24°F | 70% | 1026.1 hPa |
Baltimore, Baltimore-Washington International Airport, MD | 21 mi | 71 min | NW 6 | 10.00 mi | Fair | 38°F | 21°F | 52% | 1025.1 hPa |
Camp Springs / Andrews Air Force Base, MD | 23 mi | 69 min | NNW 10 | 10.00 mi | Fair | 38°F | 21°F | 51% | 1025.5 hPa |
Link to 5 minute data for KBWI
Wind History from BWI (wind in knots)
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 | 4 AM | |
Last 24hr | Calm | Calm | Calm | Calm | SW | S | SW G17 | SW G17 | SW | SW | W | SW | W | W | W | W | W | NW G17 | N G20 | N | N | NW | NW | |
1 day ago | W | W | W G18 | W G15 | W G19 | NW G25 | NW G24 | NW G22 | W G27 | W G23 | W G22 | W | W G18 | W | W | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm |
2 days ago | W | W | SW | Calm | SW | W | SW | S | SW | SW | S | Calm | W | W | W G18 | W | W | W | W | W | W | W | W | W |
Tide / Current Tables for Bay Ridge, Maryland
EDIT Weekend mode (on/off) (on/off)  Help One Week of DataBay Ridge
Click for Map
Sat -- 12:22 AM EST 0.73 feet High Tide
Sat -- 02:22 AM EST Moonset
Sat -- 06:58 AM EST -0.02 feet Low Tide
Sat -- 07:10 AM EST Sunrise
Sat -- 01:25 PM EST 0.79 feet High Tide
Sat -- 02:22 PM EST Moonrise
Sat -- 04:43 PM EST Sunset
Sat -- 07:50 PM EST 0.20 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sat -- 12:22 AM EST 0.73 feet High Tide
Sat -- 02:22 AM EST Moonset
Sat -- 06:58 AM EST -0.02 feet Low Tide
Sat -- 07:10 AM EST Sunrise
Sat -- 01:25 PM EST 0.79 feet High Tide
Sat -- 02:22 PM EST Moonrise
Sat -- 04:43 PM EST Sunset
Sat -- 07:50 PM EST 0.20 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 | 0.7 | 0.6 | 0.5 | 0.3 | 0.1 | 0 | -0 | 0 | 0.2 | 0.4 | 0.6 | 0.7 | 0.8 | 0.8 | 0.7 | 0.6 | 0.4 | 0.3 | 0.2 | 0.2 | 0.2 | 0.4 | 0.5 |
Tide / Current Tables for Baltimore Harbor Approach, Maryland Current
EDIT (on/off)  Help One Week of DataBaltimore Harbor Approach
Click for Map
Sat -- 01:23 AM EST 0.47 knots Max Flood
Sat -- 02:22 AM EST Moonset
Sat -- 03:59 AM EST -0.00 knots Slack
Sat -- 07:10 AM EST Sunrise
Sat -- 07:19 AM EST -0.71 knots Max Ebb
Sat -- 10:21 AM EST 0.00 knots Slack
Sat -- 01:52 PM EST 0.93 knots Max Flood
Sat -- 02:21 PM EST Moonrise
Sat -- 04:42 PM EST Sunset
Sat -- 05:22 PM EST -0.00 knots Slack
Sat -- 08:25 PM EST -0.73 knots Max Ebb
Sat -- 11:47 PM EST 0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sat -- 01:23 AM EST 0.47 knots Max Flood
Sat -- 02:22 AM EST Moonset
Sat -- 03:59 AM EST -0.00 knots Slack
Sat -- 07:10 AM EST Sunrise
Sat -- 07:19 AM EST -0.71 knots Max Ebb
Sat -- 10:21 AM EST 0.00 knots Slack
Sat -- 01:52 PM EST 0.93 knots Max Flood
Sat -- 02:21 PM EST Moonrise
Sat -- 04:42 PM EST Sunset
Sat -- 05:22 PM EST -0.00 knots Slack
Sat -- 08:25 PM EST -0.73 knots Max Ebb
Sat -- 11:47 PM EST 0.00 knots Slack
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 |
0.3 | 0.5 | 0.4 | 0.3 | -0 | -0.3 | -0.6 | -0.7 | -0.7 | -0.5 | -0.1 | 0.3 | 0.6 | 0.9 | 0.9 | 0.8 | 0.5 | 0.1 | -0.2 | -0.6 | -0.7 | -0.7 | -0.5 | -0.2 |
Weather Map
(on/off)  Help Weather Map
GEOS 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.
Link to Loop

Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for Baltimore, MD/Washington (4,6,7,8)
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Ground Weather Radar Station Dover AFB, DE
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