Marine Weather and Tides
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 5:41AM||Sunset 8:25PM||Monday May 29, 2017 5:04 PM EDT (21:04 UTC)||Moonrise 8:48AM||Moonset 11:15PM||Illumination 19%|
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|ANZ532 Chesapeake Bay From Sandy Point To North Beach- 432 Pm Edt Mon May 29 2017 |
Rest of this afternoon..NW winds 5 kt. Waves flat. A chance of showers with a slight chance of tstms.
Tonight..SE winds 5 to 10 kt. Waves 1 ft or less. Patchy fog. Vsby 1 to 3 nm.
Tue..SE winds 5 kt. Waves less than 1 ft. A chance of showers. Patchy fog. Vsby 1 to 3 nm.
Tue night..SW winds 5 kt. Waves less than 1 ft. A chance of showers and tstms.
Wed..W winds 5 to 10 kt. Waves 1 ft.
Wed night..W winds 5 to 10 kt. Waves 1 ft.
Thu..W winds 5 to 10 kt...becoming s. Waves 1 ft or less.
Fri..SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. Winds and waves higher and visibilities lower in and near tstms.
|ANZ500 432 Pm Edt Mon May 29 2017 |
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A surface boundary will stall across the waters this afternoon and weaken by tonight. Another weak front will approach late Tuesday...also stalling and weakening. A third cold front will finally push through Wednesday night, with high pressure following on Thursday. A warm front will lift northward on Friday.
7 Day Forecast for Marine Location Near Edgewater, MDHourly EDIT Help
Area Discussion for - Baltimore, MD/Washington  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus61 klwx 291841|
area forecast discussion
national weather service baltimore md washington dc
241 pm edt Mon may 29 2017
Upper level low pressure will drift east across the north side
of the great lakes this week. In the meantime, weak high
pressure will prevail over the mid atlantic outside of weak
cold frontal passages Tuesday night and Wednesday night. Low
pressure approaches from the west this weekend.
Near term through Tuesday
The marine wedge has eroded across the forecast area, and
resides just across the eastern shore at this time. The surface
boundary extends down i-95. There is not much thermal contrast
anymore, but there is still weak surface convergence. That,
combined with modest instability (mlcape around 500 j kg) and
good shear (40-50 kt effective bulk) has resulted in widely
scattered showers across southern maryland and the
fredericksburg area of virginia. Would not rule out a
thunderstorm or two, but conditions do not appear favorable for
anything strong. These should dissipate by sunset.
With ample low level moisture (dewpoints in the 60s) along the
metro corridor and without anything impeding it, the marine
wedge should return tonight. The only questions are how soon it
will return and how far west it will make it. Current NAM gfs
plus latest rap hrrr suggest at least to the blue ridge if not
i-81. Am taking an overcast layer to cho-mrb. Believe the pops
in MOS data drizzle. Have not yet added it to weather, but will
advise evening forecaster.
Tuesday morning will be a struggle to erode marine air mass once
again. That will impede afternoon thunderstorm development.
However, the right rear quad of the upper jet, differential
heating, and another surface boundary supported by a 500 mb
shortwave should provide the catalyst for scattered if not
numerous showers. Guidance generating enough CAPE west of the
maritime layer to justify including chance thunder.
Short term Tuesday night through Wednesday night
We will have one more front with shortwave support to contend
with... This time late Wednesday. Have not made many changes to
the database in association with this feature (still chance
pops). In keeping with this pattern, have been reserved in use
of thunder. Clouds should be numerous in advance of the front.
One difference though is that this time it appears as though we
will have a decent push of drier air behind the front, to
support clearing skies Wednesday night.
Decent consistency in guidance temps. Have not strayed far from
an ensemble blend.
Long term Thursday through Monday
Thu is looking like a very pleasant day with canadian high pressure
settling in over the region for the first time in quite awhile.
Plentiful sunshine and highs near or even slightly cooler than
normal for the first day of june. It will be short lived however. By
Saturday morning the next cold front is slowing as it approaches
us from the north early Saturday. It will likely stall over or very
close to us over the weekend, with low pressure riding along west to|
east across it and over us Sunday.
Aviation 18z Monday through Saturday
Vfr for now, but AOB ifr (low clouds and vsbys) should return
tonight as marine layer spreads inland again. High confidence in
its occurrence; questions revolve around timing. Current tafs
on the conservative side, taking restrictions just for the
morning push; it could be sooner.
Erosion Tuesday will be a challenge as well. Restrictions will
into mid morning if not later. Then, afternoon showers and
thunderstorms a good possibility. These flight restrictions
should be brief.
Wouldn't rule out more fog-related restrictions early wed
morning, followed by another round of possible thunderstorms wed
Vfr likely for rest of week.
Flow pattern should be light for most of the week. Bigger
concern would be fog tonight into Tue morning. Lesser chance tue
night into Wed morning. By late Wednesday, a cold front should
dry airmass out.
There could also be a few thunderstorms each afternoon through
Wednesday, although not likely strong.
Tides coastal flooding
Water levels remain high and should continue to be above normal for
the next couple of days due to the persistent onshore flow.
Coastal flood advisories are in place for washington dc and st.
Marys for this evening's high tide cycle, which is the lower of the
next two cycles. The advisory for st. Marys continues through
Tuesday and additional advisories may be necessary at other sites
for Tuesday morning's cycle. It is also likely that additional
advisories will be needed for high tide cycles through Wednesday for
the sensitive locations, and possibly elsewhere. By Thursday,
northwesterly flow as high pressure builds in should finally allow
anomalies to drop.
Lwx watches warnings advisories
Dc... Coastal flood advisory from 11 pm this evening to 2 am edt
Tuesday for dcz001.
Md... Coastal flood advisory until midnight edt Tuesday night for
near term... Hts
short term... Hts
long term... Cas
tides coastal flooding... Mm
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||46 min||71°F||1013.3 hPa|
|44063 - Annapolis||5 mi||34 min||NE 1.9 G 1.9||70°F||1013.9 hPa|
|TPLM2 - Thomas Point, MD||7 mi||64 min||E 8 G 8.9||71°F||67°F|
|CPVM2||9 mi||46 min||72°F||67°F|
|BSLM2 - Chesapeake Bay, MD||14 mi||154 min||E 6||77°F||1013 hPa||66°F|
|44043 - Patapsco, MD||16 mi||34 min||NNE 1.9 G 1.9||69°F||1014.6 hPa|
|FSNM2||19 mi||46 min||ESE 9.9 G 11||69°F||1013.6 hPa|
|FSKM2 - 8574728 - Francis Scott Key Bridge, MD||19 mi||46 min||SE 7 G 9.9||68°F||1013.7 hPa|
|BLTM2 - 8574680 - Baltimore, MD||22 mi||46 min||S 6 G 8.9||72°F||68°F||1013.3 hPa|
|TCBM2 - 8573364 - Tolchester Beach, MD||24 mi||46 min||ESE 6 G 8.9||73°F||67°F||1014 hPa|
|WASD2 - 8594900 - Washington, DC||26 mi||46 min||NNW 8 G 11||83°F||67°F||1012.7 hPa|
|44062 - Gooses Reef, MD||28 mi||34 min||WSW 3.9 G 3.9||71°F||1014.5 hPa|
|CA2 - 8571892 - Cambridge, MD||36 mi||52 min||75°F||73°F|
|COVM2 - 8577018 - Cove Point LNG Pier, MD||39 mi||46 min||S 8 G 8.9||71°F||1014.1 hPa|
|SLIM2 - 8577330 - Solomons Island, MD||44 mi||46 min||SE 8 G 8.9||72°F||70°F|
|44057 - Susquehanna, MD||48 mi||34 min||E 7.8 G 9.7||67°F||1014.4 hPa|
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||70 min||SE 7||10.00 mi||Fair||74°F||69°F||85%||1014 hPa|
|Bay Bridge Field, MD||12 mi||74 min||E 4||10.00 mi||Fair||75°F||62°F||65%||1013.9 hPa|
|Fort Meade / Tipton, MD||15 mi||73 min||ESE 7||10.00 mi||Fair||77°F||66°F||69%||1013.9 hPa|
|Baltimore, Baltimore-Washington International Airport, MD||18 mi||70 min||E 10||10.00 mi||Mostly Cloudy||75°F||66°F||76%||1013.1 hPa|
|Camp Springs / Andrews Air Force Base, MD||19 mi||66 min||WNW 6||10.00 mi||A Few Clouds||83°F||58°F||45%||1013.3 hPa|
|College Park Airport, MD||20 mi||71 min||WNW 5||10.00 mi||Fair||82°F||55°F||41%||1012.9 hPa|
|Baltimore, Inner Harbor, MD||23 mi||70 min||no data||mi||74°F||64°F||74%||1013.7 hPa|
Wind History from NAK (wind in knots)
|1 day ago||NE||NE||Calm||Calm||N||Calm||NW||Calm||Calm||Calm||Calm||SE||SE||Calm||Calm||Calm||E||SE||E||SE||SE||S||S|
|2 days ago||NW|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
Click for Map
Mon -- 01:31 AM EDT 0.24 feet Low Tide
Mon -- 05:43 AM EDT Sunrise
Mon -- 08:14 AM EDT 1.62 feet High Tide
Mon -- 09:48 AM EDT Moonrise
Mon -- 03:25 PM EDT 0.25 feet Low Tide
Mon -- 08:23 PM EDT Sunset
Mon -- 08:50 PM EDT 1.09 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Baltimore Harbor Approach |
Click for Map
Mon -- 02:10 AM EDT -0.68 knots Max Ebb
Mon -- 04:48 AM EDT 0.00 knots Slack
Mon -- 05:42 AM EDT Sunrise
Mon -- 08:27 AM EDT 1.18 knots Max Flood
Mon -- 09:47 AM EDT Moonrise
Mon -- 11:50 AM EDT -0.00 knots Slack
Mon -- 03:12 PM EDT -1.16 knots Max Ebb
Mon -- 06:49 PM EDT 0.00 knots Slack
Mon -- 08:23 PM EDT Sunset
Mon -- 09:30 PM EDT 0.68 knots Max Flood
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 (17,4,5,8)(on/off)  Help
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