Marine Weather and Tides
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.
|Sunrise 6:52AM||Sunset 7:28PM||Wednesday March 29, 2017 10:32 PM EDT (02:32 UTC)||Moonrise 7:06AM||Moonset 8:25PM||Illumination 7%|
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|ANZ538 Patapsco River Including Baltimore Harbor- 731 Pm Edt Wed Mar 29 2017 |
Tonight..NE winds 5 to 10 kt. Waves 1 ft.
Thu..E winds 5 kt. Waves less than 1 ft.
Thu night..SE winds 5 to 10 kt. Waves 1 ft. Rain likely.
Fri..SE winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft. Rain. Patchy fog.
Fri night..NW winds 5 to 10 kt. Waves 1 ft or less. Showers.
Sat..NW winds 5 to 10 kt. Waves 1 ft.
Sat night..NW winds 5 to 10 kt. Waves 1 ft.
Sun..N winds 5 to 10 kt...becoming E after midnight. Waves 1 ft.
Mon..SE winds 5 to 10 kt. Waves 1 ft. Showers likely through the night.
|ANZ500 731 Pm Edt Wed Mar 29 2017 |
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure move north of the area tonight before moving offshore Thursday. Low pressure will approach the waters Friday before passing through Friday evening. High pressure will build over the waters again by Sunday. Small craft advisories are possible Thursday night through Saturday.
7 Day Forecast for Marine Location Near Arnold, MDHourly EDIT Help
Area Discussion for - Baltimore, MD/Washington  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus61 klwx 300110|
area forecast discussion
national weather service baltimore md/washington dc
910 pm edt Wed mar 29 2017
High pressure will pass north of the area tonight before moving
off the coast Thursday. Low pressure will pass through the area
Friday. High pressure will gradually return Saturday and Sunday
before another low pressure possibly impacts the area Monday
and Tuesday next week.
Near term /until 6 am Thursday morning/
High pressure is centered over eastern ontario and western
quebec this evening. Surface winds are taking a northeasterly
component, and the earlier CU field around staunton and
charlottesville is expanding into broken altostratus. Elsewhere,
only a little cirrus is found, which will be the case until the
lower cloud decks expand later tonight as the flow becomes
easterly. In addition, the easterly flow may result in some
spotty light rain or drizzle, mainly in the southern shenandoah
valley and adjacent highlands. Lows tonight will be cooler than
the last few nights, with readings in the 30s and 40s. Am not
planning any major adjustments to temperatures, though
variations in cloud cover and decoupling could modulate them up
or down, respectively, in some spots.
Short term /6 am Thursday morning through Saturday/
Cad will more or less remain in place in the low levels
Thursday with the high pressure sliding eastward to our north.
At the same time, low pressure system will be ejecting out of
the plains with warm/moist air advection. In addition, the
upslope flow will result in lower clouds and perhaps some light
rain or drizzle in the mountains. Highs will be cooler than
today due to the lack of Sun and onshore flow, with 50s
widespread and the cooler spots in the 40s.
Warm and moist air advection continues Thursday night and with
that we'll see increasing chances for rain. Lows mainly in the
40s. Model guidance in good agreement that the low pressure
system will track east-northeastward from near st. Louis
Thursday evening to ohio by Friday afternoon, before
redeveloping near the DELMARVA late Friday and Friday night.
Thus, most widespread coverage of moderate rain expected late
Thursday night and Friday morning, although chances of rain will
remain high into the afternoon. Half an inch of rain is likely
for most of the area, with over an inch wherever the most
favorable forcing aligns. We'll also have to monitor how far
north the warm sector can make it Friday afternoon. Latest
guidance indicates it may approach portions of central va and
southern md, so have maintained a slight chance of tstorms there
Friday afternoon. Highs on Friday uncertain, with locations
that get south of the warm front possibly heading towards 70,
while northern locales near the mason-dixon line may struggle to
reach 50. Showers will begin to slowly wind down Friday night
as the low pulls away and winds turn northwesterly.
Low pressure slides northeast of the region Saturday, but
lingering instability and weak vort MAX could produce a few
stray showers still. Highs will be in the 50s to lower 60s.
Long term /Saturday night through Wednesday/
High pressure will settle into the region Sunday through early
Monday. Dry and seasonable temperatures expected throughout the
The next storm system will move into the region midday Monday
through Tuesday, bringing the chance for rain showers to the
region once again.
Brief high pressure will build into the region Wednesday before|
the next storm system approaches Wednesday night.
Aviation /01z Thursday through Monday/
Vfr will continue through at least the first half of Thursday
all terminals. Winds have become northeasterly this evening,
becoming east-southeasterly on Thursday. This will help usher
in additional clouds, although ceilings still expected to remain
vfr. Highest chances for some MVFR ceilings will be at cho and
mrb, but the probability of this occurring is low until after
Greater chances for sub-vfr conditions will occur Thursday night
through Friday night with widespread rainfall. Ifr conditions
A northwest flow will allow for cigs/vsbys to improve Saturday
behind departing low pressure... But a few showers cannot be
Vfr conditions evolving Saturday night. Winds northwest 5 knots
Saturday night.VFR conditions expected Sunday into Sunday
night. Winds becoming light and variable Sunday and Sunday
Winds have taken a nne direction this evening, locally 10 to 15
knots. A surge of northeasterly winds is expected later
tonight, although magnitudes are a bit uncertain. Guidance
suggests the best window for SCA conditions will be between 11
pm and 3 am. So if gusts are not realized by this time, the sca
for the more open waters of the bay and lower potomac may be
Sub-sca winds then expected Thursday, with next potential for
increasing winds on Thursday night/Friday ahead of our next
system (especially Friday), with the strongest winds expected
across our southern waters.
Low pressure will move away from the waters Saturday and
northwest flow will develop. A small craft advisory may be
needed for portions of the waters during this time.
No marine hazards expected Saturday night through Sunday
night. Winds northwest 5 to 10 knots Saturday night through
Low pressure will pass through the area Friday night. An
onshore flow will develop ahead of the low and this will cause
elevated water levels Friday into Friday night. Minor tidal
flooding near high tide is possible during this time.
Marine... Small craft advisory until 6 am edt Thursday for anz530>534-
near term... Ads/rcm
short term... Ads/rcm
long term... Klw
tides/coastal flooding... Lwx
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|
|APAM2 - 8575512 - Annapolis, MD||4 mi||45 min||54°F||1022 hPa|
|CPVM2||8 mi||45 min||51°F||43°F|
|TPLM2 - Thomas Point, MD||10 mi||93 min||NNE 15 G 16||54°F||48°F||38°F|
|FSNM2||13 mi||45 min||NNE 12 G 14||55°F||1022 hPa|
|FSKM2 - 8574728 - Francis Scott Key Bridge, MD||13 mi||45 min||NNE 9.9 G 11||54°F||1022.5 hPa|
|BLTM2 - 8574680 - Baltimore, MD||17 mi||45 min||NE 8 G 11||55°F||49°F||1022.1 hPa|
|BSLM2 - Chesapeake Bay, MD||20 mi||123 min||N 2.9||59°F||1021 hPa||37°F|
|TCBM2 - 8573364 - Tolchester Beach, MD||20 mi||45 min||NNE 6 G 11||53°F||50°F||1022.7 hPa|
|WASD2 - 8594900 - Washington, DC||28 mi||45 min||NE 4.1 G 8||58°F||53°F||1021.8 hPa|
|44062 - Gooses Reef, MD||33 mi||33 min||E 9.7 G 12||52°F||48°F||1 ft||1022.4 hPa (+1.9)|
|CA2 - 8571892 - Cambridge, MD||40 mi||45 min||NE 11 G 14||54°F||51°F||1021.1 hPa|
|COVM2 - 8577018 - Cove Point LNG Pier, MD||44 mi||45 min||ENE 9.9 G 11||55°F||1022.5 hPa|
|SLIM2 - 8577330 - Solomons Island, MD||49 mi||45 min||NNE 6 G 8||56°F||49°F|
Wind History for Francis Scott Key Bridge NE Tower, MD(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Annapolis, United States Naval Academy, MD||4 mi||39 min||NNE 6||10.00 mi||Fair||55°F||35°F||47%||1022.5 hPa|
|Bay Bridge Field, MD||11 mi||58 min||N 4||10.00 mi||Fair||52°F||35°F||54%||1022.3 hPa|
|Fort Meade / Tipton, MD||13 mi||54 min||NNE 4||10.00 mi||Fair||52°F||32°F||47%||1023 hPa|
|Baltimore, Baltimore-Washington International Airport, MD||13 mi||39 min||NE 14 G 19||10.00 mi||A Few Clouds||54°F||30°F||42%||1022.1 hPa|
|Baltimore, Inner Harbor, MD||18 mi||39 min||no data||mi||55°F||28°F||37%||1022.6 hPa|
|College Park Airport, MD||21 mi||52 min||NNE 6||10.00 mi||Fair||54°F||32°F||43%||1022 hPa|
|Baltimore / Martin, MD||22 mi||48 min||N 0||10.00 mi||Clear||54°F||35°F||51%||1023 hPa|
|Camp Springs / Andrews Air Force Base, MD||23 mi||95 min||NE 9||10.00 mi||Fair||54°F||34°F||46%||1021.7 hPa|
Wind History from NAK (wind in knots)
|1 day ago||SE||S||SE||S||SE||E||SE||SE||SE||SE||S||SE||E||SE||SE||E||NW||NW||NW||NW||NE||Calm||N||N|
|2 days ago||E||E||E||E||E||E||E||Calm||NW||Calm||SE||E||SE||SE||SE||SE||SE||E||E||E||SE||Calm||Calm||SE |
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Brewer Point |
Click for Map
Wed -- 01:14 AM EDT 0.04 feet Low Tide
Wed -- 06:55 AM EDT Sunrise
Wed -- 07:15 AM EDT 1.10 feet High Tide
Wed -- 08:05 AM EDT Moonrise
Wed -- 02:08 PM EDT -0.01 feet Low Tide
Wed -- 07:27 PM EDT Sunset
Wed -- 07:45 PM EDT 0.89 feet High Tide
Wed -- 09:25 PM EDT Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Baltimore Harbor Approach |
Click for Map
Wed -- 12:39 AM EDT -0.87 knots Max Ebb
Wed -- 03:36 AM EDT 0.00 knots Slack
Wed -- 06:54 AM EDT Sunrise
Wed -- 06:54 AM EDT 1.06 knots Max Flood
Wed -- 08:05 AM EDT Moonrise
Wed -- 10:09 AM EDT -0.00 knots Slack
Wed -- 01:18 PM EDT -1.00 knots Max Ebb
Wed -- 04:36 PM EDT 0.00 knots Slack
Wed -- 07:24 PM EDT 0.76 knots Max Flood
Wed -- 07:26 PM EDT Sunset
Wed -- 09:24 PM EDT Moonset
Wed -- 10:17 PM EDT -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Weather Map and Satellite Images(on/off)  Help
|Weather Map ||IR Satellite Image from GEOS|
GOES Local Image of Mid-Atlantic EDIT
Wind Forecast for Baltimore, MD/Washington (22,6,7,8)(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.