Marine Weather and Tides
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
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.
|Sunrise 6:57AM||Sunset 6:56PM||Tuesday September 26, 2017 2:05 PM EDT (18:05 UTC)||Moonrise 11:57AM||Moonset 10:10PM||Illumination 35%|
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|ANZ532 Chesapeake Bay From Sandy Point To North Beach- 132 Pm Edt Tue Sep 26 2017 |
This afternoon..NE winds 10 kt. Waves 1 ft.
Tonight..NE winds 10 to 15 kt. Waves 1 ft.
Wed..NE winds 10 to 15 kt. Waves 2 ft.
Wed night..N winds 10 to 15 kt. Waves 1 ft.
Thu..N winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Thu night..N winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Fri..NW winds 5 to 10 kt. Waves 1 ft or less.
Sat..N winds 10 to 15 kt. Waves 1 to 2 ft.
|ANZ500 132 Pm Edt Tue Sep 26 2017 |
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will weaken overhead through Wednesday as hurricane maria drifts north to northeast off the north carolina coast. A cold front will pass through the area Thursday and a reinforcing cold front will pass through late Friday into early Saturday. High pressure will return for the weekend. Small craft advisories may be needed Wednesday night and gale force winds are possible Thursday. Small craft advisories may be needed again Friday night into Saturday. Refer to the national hurricane center for up-to-date information on hurricane maria.
7 Day Forecast for Marine Location Near North Beach, MDHourly EDIT Help
Area Discussion for - Baltimore, MD/Washington  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus61 klwx 261415 aaa|
area forecast discussion... Updated
national weather service baltimore md washington dc
1015 am edt Tue sep 26 2017
High pressure will slowly weaken its grip over the area today
and Wednesday as hurricane maria stalls in the western
atlantic. A cold front will move through Thursday, bringing
seasonable temperatures from late this week through early next
week. The front will also push hurricane maria out to sea.
Little if any rain is expected through early next week.
Near term through tonight
It appears any showers associated with far outer rain bands of
maria will remain well southeast of the area. Low clouds will
remain the main impact from maria for areas along and east of
the i-95 corridor. This should keep temps a couple of degs
cooler than yesterday. No precip is expected.
tonight, maria will remain off the nc coast. A few showers may
reach southern md, but again, odds are not high. We could see
more clouds advect in as well from the east, while inland could
see more patchy fog. All in all, not much different from what
we've seen lately. Lows mainly in the 60s.
Short term Wednesday through Thursday night
Maria will start turning east away from the region late
Wednesday, so we will still see some clouds especially in
eastern areas from it on Wednesday, and perhaps a stray shower
in southern md. Otherwise, we likely end up a bit warmer
Wednesday as clouds should overall be reduced as the storm
begins turning out to sea. Highs mainly 80s, but a few degrees
Strong cold front moves in early Thursday, with a pretty strong
breeze expected. However, with limited moisture and dynamics,
don't expect any showers with the front at this time. Humidity
will lower and highs may actually fail to reach 80 for the first
time in quite a few days. Skies will turn out mostly sunny.
Significantly cooler with diminishing wind Thursday night, with
40s and low 50s common.
Long term Friday through Monday
Overnight model guidance appears to have continued its trend of
a quicker weaker upper trough crossing the region Friday night
into Saturday. This appears to be in response to a stronger
upper low moving into western noam which shoves everything
downstream eastward quicker. The trough axis surface reflection
in the form of a reinforcing cold front are now progged to pass
through our area during the overnight hours. This decreases
further the chance for appreciable rainfall. Behind the front,
an autumnal high of canadian origins (~1030 mb) builds north of
the area bringing cooler and drier air through the weekend.
The tendency of lower heights over the western CONUS would tend
to support a stronger ridge developing over the middle portion|
of the country. This ridge then builds towards the eastern conus
during the first part of next week. This results in a very low
chance of rain.
In fact, the last several runs of the GEFS have shown a very
strong negative pna during this time which would suggest strong
to extreme ridging building over the eastern CONUS in the
extended. Operational ECMWF not as extreme but its ensembles
agree with the idea of a strongly negative pna pattern early
next week. By extrapolation, this could lead to significantly
warmer than normal temperatures by the middle of next week.
However, the position of the (~1040 mb) surface high over
southeastern canada could keep a cooler wedge of air near the
surface offsetting the anomalously high heights aloft through at
Aviation 14z Tuesday through Saturday
MVFR CIGS at dca and bwi through early afternoon then improve to
vfr. Another round of low clouds and fog is possible tonight,
with a return toVFR likely again on Wednesday afternoon. By
Thursday, a strong cold front will bring gusty northwest winds,
preventing any more ifr or even MVFR conditions, even in the
morning. No more than a very isolated shower is expected through
the next few days.
MainlyVFR fri-sat. N winds 10 kts, a few gusts sat.
Sca over middle bay and adjancent waterways through Wednesday
with maria hanging off the coast. Then, strong cold front will
likely bring SCA to all waters Thursday, and potential for gales
remains with this front. Winds start diminishing late Thursday.
Northerly surge in cool dry advection early Saturday will
likely lead to a period of SCA conditions.
Tides coastal flooding
Water levels will remain elevated through midweek before a cold
frontal passage turns winds northerly and pushes excess water
out the mouth of the bay on Thursday.
Lwx watches warnings advisories
Md... Coastal flood advisory until 10 pm edt this evening for mdz017.
Marine... Small craft advisory from midnight tonight to 6 pm edt
Wednesday for anz533-541-542.
Small craft advisory until 6 pm edt Wednesday for anz534-537-
products... Rcm dfh
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|
|BSLM2 - Chesapeake Bay, MD||10 mi||155 min||N 1.9||67°F||1017 hPa||63°F|
|44062 - Gooses Reef, MD||13 mi||35 min||N 14 G 16||73°F||1016.3 hPa|
|TPLM2 - Thomas Point, MD||13 mi||65 min||N 11 G 12||71°F||77°F|
|44063 - Annapolis||17 mi||35 min||NE 9.7 G 12||73°F||1015.1 hPa|
|APAM2 - 8575512 - Annapolis, MD||18 mi||47 min||74°F||1015.2 hPa|
|CPVM2||20 mi||47 min||74°F||73°F|
|COVM2 - 8577018 - Cove Point LNG Pier, MD||24 mi||47 min||NNE 14 G 17||72°F||1015.6 hPa|
|CA2 - 8571892 - Cambridge, MD||27 mi||47 min||75°F||77°F||1015.7 hPa|
|WASD2 - 8594900 - Washington, DC||28 mi||47 min||ENE 2.9 G 8||79°F||77°F||1015.6 hPa|
|SLIM2 - 8577330 - Solomons Island, MD||29 mi||47 min||N 12 G 16||73°F||77°F||1014.3 hPa|
|44043 - Patapsco, MD||30 mi||35 min||NE 5.8 G 7.8||72°F||1016.6 hPa|
|FSKM2 - 8574728 - Francis Scott Key Bridge, MD||34 mi||47 min||ESE 7 G 8||73°F||1015.7 hPa|
|TCBM2 - 8573364 - Tolchester Beach, MD||37 mi||47 min||N 8 G 9.9||73°F||77°F||1016.2 hPa|
|BLTM2 - 8574680 - Baltimore, MD||37 mi||47 min||SSE 2.9 G 7||79°F||80°F||1015.2 hPa|
|NCDV2||39 mi||47 min||N 2.9 G 6||74°F||79°F||1014.2 hPa|
|PPTM2 - 8578240 - Piney Point, MD||41 mi||47 min||NNE 11 G 13|
|BISM2 - 8571421 - Bishops Head, MD||44 mi||47 min||NNE 8.9 G 13||77°F||77°F||1014.2 hPa|
|44042 - Potomac, MD||49 mi||35 min||NNE 16 G 19||74°F||1013.3 hPa|
Wind History for Cove Point LNG Pier, 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||17 mi||71 min||N 7||10.00 mi||Overcast||76°F||71°F||85%||1016 hPa|
|Camp Springs / Andrews Air Force Base, MD||19 mi||67 min||N 6||10.00 mi||Overcast||73°F||66°F||80%||1016.4 hPa|
|Bay Bridge Field, MD||20 mi||85 min||N 5||10.00 mi||Overcast||73°F||68°F||83%||1015.9 hPa|
Wind History from ADW (wind in knots)
|1 day ago||E||SE||SE||E||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||E||E||E||N||NE|
|2 days ago||N||N||N||N||N||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||N||NW||N||N||N||N||NE||N |
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Rose Haven |
Click for Map
Tue -- 03:50 AM EDT 0.65 feet Low Tide
Tue -- 06:57 AM EDT Sunrise
Tue -- 08:38 AM EDT 1.04 feet High Tide
Tue -- 12:56 PM EDT Moonrise
Tue -- 02:31 PM EDT 0.37 feet Low Tide
Tue -- 06:56 PM EDT Sunset
Tue -- 09:32 PM EDT 1.41 feet High Tide
Tue -- 11:10 PM EDT Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
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|Baltimore Harbor Approach |
Click for Map
Tue -- 01:19 AM EDT -0.00 knots Slack
Tue -- 04:32 AM EDT -0.79 knots Max Ebb
Tue -- 06:57 AM EDT Sunrise
Tue -- 08:04 AM EDT 0.00 knots Slack
Tue -- 10:39 AM EDT 0.46 knots Max Flood
Tue -- 12:56 PM EDT Moonrise
Tue -- 01:23 PM EDT -0.00 knots Slack
Tue -- 04:22 PM EDT -0.54 knots Max Ebb
Tue -- 06:55 PM EDT Sunset
Tue -- 07:08 PM EDT 0.00 knots Slack
Tue -- 10:44 PM EDT 0.84 knots Max Flood
Tue -- 11:09 PM EDT Moonset
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 (14,3,4,5)(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.