Marine Weather and Tides
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 5:43AM||Sunset 8:18PM||Wednesday May 23, 2018 6:18 PM EDT (22:18 UTC)||Moonrise 1:21PM||Moonset 1:43AM||Illumination 66%|
EDIT (on/off)  Help
|ANZ541 Choptank River To Cambridge Md And The Little Choptank River- 431 Pm Edt Wed May 23 2018 |
.small craft advisory in effect until 6 pm edt this evening...
Rest of this afternoon..NW winds 10 kt with gusts to 20 kt. Waves 1 ft.
Tonight..NW winds 5 kt. Waves less than 1 ft.
Thu..NE winds 5 to 10 kt. Waves 1 ft.
Thu night..S winds 5 to 10 kt. Waves 1 ft.
Fri..S winds 5 to 10 kt. Waves 1 ft.
Fri night..S winds 10 kt. Waves 1 ft.
Sat..SW winds 10 kt. Waves 1 ft. A chance of tstms. A chance of showers.
Sun..S 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 431 Pm Edt Wed May 23 2018 |
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure over the great lakes will build over the mid-atlantic through the end of the week, then move offshore this weekend. Low pressure may approach the area from the south early next week. Small craft advisories may be needed late Friday into the weekend.
7 Day Forecast for Marine Location Near Tilghman Island, MDHourly EDIT Help
Area Discussion for - Baltimore, MD/Washington  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus61 klwx 231910|
area forecast discussion
national weather service baltimore md washington dc
310 pm edt Wed may 23 2018
High pressure will build into the region from the northwest
late this afternoon through Thursday night. This high should move
offshore Friday. Moisture will increase ahead of a low pressure
system over the weekend into early next week.
Near term through Thursday
A shower in spots across southern maryland, the central
chesapeake bay, or parts of the virginia piedmont is possible as
the cold front pushes across these areas later this afternoon.
A rumble of thunder cannot be ruled out. Any activity should be
very isolated and brief. High temperatures will be in the lower
to middle 80s for most locations.
High pressure will build in from the northwest tonight. Dry
conditions with mainly scattered mid-level clouds expected tonight.
Low temperatures will drop down into the upper 50s to near 60 over
the eastern half of our region, while lows should reach the lower
50s over the western half of our region.
Short term Thursday night through Friday night
The center of high pressure will move overhead later in the day
Thursday into Thursday night before moving offshore Friday. In the
meantime, we can enjoy dry conditions Thursday into Friday.
As we get into late Friday and Friday night and looking out west
into the potomac highlands, we could encounter a shower or
two; otherwise, dry conditions for all.
Dewpoint temperatures will be in the lower 50s Thursday versus the
lower 60s that we experienced this afternoon. This should make
conditions a little more comfortable. Temperatures both Thursday and
Friday will reach the lower to middle 80s with increasing humidity
expected Friday around the back side of the area of high pressure.
Low temperatures Thursday night expected to be in the middle 50s to
Long term Saturday through Wednesday
Saturday into Sunday, a high pressure system will be located off the
atlantic coast near bermuda. This will lead to a south to
southwesterly flow which will work to funnel tropical moisture
into the region. Temperatures rising up into the mid to upper
80s on Saturday and Sunday coupled with tropical moisture could
lead to the formation of convective showers and thunderstorms
which may produce heavy showers.
Monday through Tuesday, a weak boundary will approach from the west.
A south to southwesterly flow will continue the flow of tropical
moisture into the region. High temperatures will be in the low to
mid 80s on Monday. The approaching frontal boundary on Monday will
act as a convergence zone which may allow for some forcing to cause
the formation of storms and showers. The combination of tropical|
moisture and the boundary will lead to a chance for thunderstorms
and showers on Monday.
Aviation 19z Wednesday through Monday
Vfr conditions late this afternoon through Friday night. Winds
have become northwesterly and gusting over 20 knots at times behind
the cold front at all terminals, except for cho, where winds are
generally still light out of the north. Expect winds to diminish
tonight as high pressure builds in over the region.
Saturday, the combination of tropical moisture and rising
temperatures up into the mid 80s will lead to an environment that
could be conducive for the formation of disorganize thunderstorms
and heavy showers.
A small craft advisory is in effect through late this afternoon as
we look at a cold front passing over the waters of the potomac river
and chesapeake bay. For the most part, wind gusts have been between
17 and 22 knots with gusts as high as 26 knots in a few locations.
High pressure will build across the waters tonight and Thursday
before moving offshore on Friday with light winds. Some of the
wider waters of the bay may come close to SCA criteria Friday
night as southerly flow increases on the back side of the high.
On Friday, winds will be out of the south which may lead to the
need for a small craft advisory. Skies should remain most clear with
mild temperatures in the upper 70s to lower 80s. On Saturday, the
influx of tropical moisture will combine with higher
temperatures to allow for the formation of disorganized showers
Tides coastal flooding
Tidal anomalies will continue to decrease this afternoon as
northwesterly winds develop behind a cold front. However, water
levels remain more elevated around dc given some freshwater
input, with the current high tide barely coming in below flood
stage. This situation may repeat itself during the morning high
tides the next couple days.
Lwx watches warnings advisories
Marine... Small craft advisory until 6 pm edt this evening for
near term... Klw
short term... Klw
long term... Jmg
aviation... Klw jmg
marine... Klw jmg
tides coastal flooding... Klw
Weather Reporting StationsEDIT (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|
|44062 - Gooses Reef, MD||12 mi||38 min||NNE 12 G 14||76°F||1016.2 hPa|
|TPLM2 - Thomas Point, MD||14 mi||78 min||NNW 11 G 13||77°F||70°F||1016.7 hPa (+0.0)||57°F|
|CA2 - 8571892 - Cambridge, MD||16 mi||48 min||80°F||75°F||1016.6 hPa|
|44063 - Annapolis||19 mi||38 min||NW 9.7 G 14||78°F||1016.1 hPa|
|CPVM2||20 mi||48 min||76°F||61°F|
|BSLM2 - Chesapeake Bay, MD||21 mi||108 min||NW 5.1||77°F||1016 hPa||58°F|
|APAM2 - 8575512 - Annapolis, MD||21 mi||48 min||78°F||1015.5 hPa|
|COVM2 - 8577018 - Cove Point LNG Pier, MD||22 mi||48 min||N 13 G 14||74°F||1016.3 hPa|
|SLIM2 - 8577330 - Solomons Island, MD||28 mi||48 min||NNW 13 G 15||79°F||69°F||1015.4 hPa|
|TCBM2 - 8573364 - Tolchester Beach, MD||35 mi||48 min||N 11 G 12||74°F||70°F||1016.2 hPa|
|BISM2 - 8571421 - Bishops Head, MD||37 mi||48 min||NNW 14 G 19||80°F||80°F||1016 hPa|
|FSNM2||37 mi||48 min||NNW 14 G 17||78°F||1015.8 hPa|
|FSKM2 - 8574728 - Francis Scott Key Bridge, MD||37 mi||48 min||NNW 13 G 15||78°F||1015.8 hPa|
|WASD2 - 8594900 - Washington, DC||39 mi||48 min||NW 6 G 11||82°F||67°F||1016.5 hPa|
|BLTM2 - 8574680 - Baltimore, MD||41 mi||48 min||N 9.9 G 13||79°F||70°F||1015.7 hPa|
|PPTM2 - 8578240 - Piney Point, MD||41 mi||48 min||N 14 G 17|
|NCDV2||47 mi||48 min||N 5.1 G 11||81°F||75°F||1015.1 hPa|
|44042 - Potomac, MD||47 mi||38 min||NE 12 G 16||77°F||1014.7 hPa|
Wind History for Cambridge, MD(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Easton / Newman Field, MD||15 mi||28 min||N 10||10.00 mi||Partly Cloudy||81°F||59°F||48%||1016.9 hPa|
|Bay Bridge Field, MD||18 mi||43 min||NNW 8||7.00 mi||Fair||77°F||62°F||61%||1015.9 hPa|
|Cambridge-Dorchester Airport, MD||19 mi||43 min||NW 12 G 19||10.00 mi||A Few Clouds||79°F||59°F||51%||1015.6 hPa|
Wind History from ESN (wind in knots)
|1 day ago||SE||SW||S||S||S||S||S||Calm||Calm||Calm||S||Calm||Calm||SE||SE||S||S||S||S||S||SW||SW||SW||W|
|2 days ago||SW||SW||Calm||Calm||Calm||Calm||Calm||N||NE||E||E||E||NE||E||E|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
Click for Map
Wed -- 02:42 AM EDT Moonset
Wed -- 05:47 AM EDT Sunrise
Wed -- 05:55 AM EDT 0.55 feet Low Tide
Wed -- 11:26 AM EDT 1.74 feet High Tide
Wed -- 02:21 PM EDT Moonrise
Wed -- 06:30 PM EDT 0.41 feet Low Tide
Wed -- 08:17 PM EDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Baltimore Harbor Approach |
Click for Map
Wed -- 12:48 AM EDT 0.80 knots Max Flood
Wed -- 02:43 AM EDT Moonset
Wed -- 04:04 AM EDT -0.00 knots Slack
Wed -- 05:46 AM EDT Sunrise
Wed -- 06:56 AM EDT -0.63 knots Max Ebb
Wed -- 09:50 AM EDT 0.00 knots Slack
Wed -- 12:56 PM EDT 0.70 knots Max Flood
Wed -- 02:21 PM EDT Moonrise
Wed -- 03:52 PM EDT -0.00 knots Slack
Wed -- 07:13 PM EDT -0.88 knots Max Ebb
Wed -- 08:18 PM EDT Sunset
Wed -- 10:27 PM EDT 0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Weather Map and Satellite Images(on/off)  HelpWeather Map
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 (18,4,5,8)(on/off)  Help
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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.