Thursday, September21, 2017

Marine Weather and Tides
Annapolis, MD

Version 3.4
What's New / NOTES
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 6:52AMSunset 7:04PM Thursday September 21, 2017 3:42 PM EDT (19:42 UTC) Moonrise 7:09AMMoonset 7:11PM Illumination 1% Phase: Waxing Crescent; Moon at 1 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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ANZ532 Chesapeake Bay From Sandy Point To North Beach- 131 Pm Edt Thu Sep 21 2017
This afternoon..NE winds 5 kt. Waves less than 1 ft.
Tonight..N winds 5 kt. Waves flat.
Fri..N winds 5 kt. Waves less than 1 ft.
Fri night..N winds 5 kt. Waves less than 1 ft.
Sat..N winds 5 kt. Waves less than 1 ft.
Sat night..N winds around 5 kt. Waves 1 ft or less.
Sun..NE winds around 5 kt. Waves 1 ft or less.
Mon..NE winds around 5 kt. Waves 1 ft or less.
ANZ500 131 Pm Edt Thu Sep 21 2017
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A ridge of high pressure will remain over the eastern united states through early next week.

7 Day Forecast for Marine Location Near Annapolis, MD
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location: 38.97, -76.49     debug

Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 211805
area forecast discussion
national weather service baltimore md washington dc
205 pm edt Thu sep 21 2017

Warm, high pressure both at the surface and aloft will remain
overhead through the weekend and into next week. Hurricane maria
is expected to remain over the atlantic and well to our
southeast through at least early next week.

Near term until 6 pm this evening
Tropical storm jose continues to be off the coast of new
england, well to our east. It is expected to stay there and
weaken over the next few days. High pressure ridge extends along
the appalachians with its influence over the eastern u.S. A
weak trough of low pressure which brought showers and
thunderstorms to western virginia yesterday has moved south.

Its influence may still bring a stray shower to the far
southwestern corner of the CWA this afternoon, but only a
slight chance. Otherwise, another mostly sunny and warm day with
mainly thin high clouds. Highs today will be well into the 80s
once again, with lows tonight in the 50s and 60s once again.

Winds will be light.

Short term 6 pm this evening through Saturday night
High pressure ridge at the surface will remain more or less
stationary over the appalachians through Saturday night. Aloft,
ridge of high pressure centered over the midwest will continue
to extend its influence across our region, while jose will
continue to meander over the northwest atlantic near new
england. The end result will be continued warm and dry weather,
with the only real weather concern being extent and coverage of
patchy fog each morning. Highs will be well into the 80s Friday
and Saturday with lows in the 50s and 60s. Winds will be light.

Long term Sunday through Thursday
High pressure both at the surface and aloft will control the weather
pattern for Sunday and Sunday night... Bringing more dry and warm

The remnants of jose may push closer toward the east coast Monday
and Tuesday... But latest guidance suggests that this remains far
enough out to sea so that it will have little impact on our weather.

Will continue to keep an eye on this because there are still a few
gefs members that bring it farther west into our area which would
bring more clouds and possible precipitation. However... A vast
majority of the GEFS members keep it out to sea long with the latest
deterministic runs of the gfs... ECMWF and ukmet. Therefore... The
most likely scenario is that high pressure both at the surface and
aloft continues to control the weather pattern... Bringing more dry
conditions along with above normal temperatures.

Hurricane maria may approach the east coast of the united states
during the middle portion of next week. Latest guidance suggests
that there is a better chance for this system to remain
offshore... But confidence is still low this far out. Please consult
the national hurricane center for the latest information regarding
the forecast for hurricane maria.

Aviation 18z Thursday through Tuesday
Main concern through the next several days is patchy late night
and early morning fog, mainly at mrb and cho. Vis could drop
briefly to ifr at either or both sites each of the next three
mornings. An MVFR restriction is not out of the question at the
other terminals (except dca). Otherwise,VFR with light winds
should prevail through Saturday night thanks to high pressure.

More of the same into next week. High pressure will control the
weather pattern Sunday through Tuesday. Areas of low clouds and
fog are possible during the overnight and early morning hours
each day.

High pressure will provide dry weather with sub-sca winds
through the weekend into early next week.

Global models show winds strengthening on Tue as pressure
gradient tightens as hurricane maria gets closer to the mid-atlc
coast middle of next week. For now, it appears small craft
advisories are possible.

Tides coastal flooding
Minor coastal flooding will continue along sensitive tidal shores
over the next several days.

Lwx watches warnings advisories
Dc... Coastal flood advisory until midnight edt tonight for dcz001.

Md... Coastal flood advisory until 5 pm edt this afternoon for

Coastal flood advisory until 9 pm edt this evening for mdz014.

Coastal flood advisory until 7 pm edt this evening for mdz017.

Va... Coastal flood advisory until midnight edt tonight for vaz054.

Wv... None.

Marine... None.

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
APAM2 - 8575512 - Annapolis, MD 1 mi43 min 82°F 1015.6 hPa (-1.2)
44063 - Annapolis 2 mi33 min E 5.8 G 7.8 78°F 1015.2 hPa
TPLM2 - Thomas Point, MD 6 mi43 min ENE 5.1 G 5.1 77°F 76°F
CPVM2 6 mi43 min 81°F 67°F
44043 - Patapsco, MD 14 mi33 min S 3.9 G 3.9 79°F 1017.3 hPa
BSLM2 - Chesapeake Bay, MD 17 mi133 min N 2.9 82°F 1016 hPa64°F
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 17 mi43 min SE 5.1 G 6 79°F 1015.9 hPa (-1.4)
BLTM2 - 8574680 - Baltimore, MD 21 mi43 min NNE 6 G 8 84°F 78°F1015.6 hPa (-1.3)
TCBM2 - 8573364 - Tolchester Beach, MD 21 mi43 min WSW 2.9 G 4.1 80°F 76°F1016.3 hPa (-1.4)
WASD2 - 8594900 - Washington, DC 29 mi43 min NNW 2.9 G 6 85°F 75°F
44062 - Gooses Reef, MD 29 mi33 min NE 3.9 G 3.9 79°F 1016.9 hPa
CA2 - 8571892 - Cambridge, MD 35 mi43 min 84°F 77°F1016.9 hPa (-1.0)
COVM2 - 8577018 - Cove Point LNG Pier, MD 40 mi43 min NNW 5.1 G 6 78°F 1017 hPa (-0.9)
44057 - Susquehanna, MD 45 mi33 min NNW 7.8 G 9.7 84°F 1015.7 hPa
SLIM2 - 8577330 - Solomons Island, MD 45 mi43 min N 6 G 11 81°F 77°F1015.8 hPa (-0.9)

Wind History for Francis Scott Key Bridge NE Tower, MD
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1 day
2 days

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Annapolis, United States Naval Academy, MD1 mi49 minN 510.00 miFair86°F66°F53%1016.2 hPa
Bay Bridge Field, MD8 mi63 minNNW 410.00 miFair82°F64°F55%1016.3 hPa
Fort Meade / Tipton, MD17 mi58 minNNW 410.00 miPartly Cloudy82°F62°F51%1017.3 hPa
Baltimore, Baltimore-Washington International Airport, MD18 mi49 minW 510.00 miMostly Cloudy87°F64°F48%1015.9 hPa
Camp Springs / Andrews Air Force Base, MD22 mi1.7 hrsNNW 410.00 miPartly Cloudy84°F63°F50%1017 hPa
Baltimore, Inner Harbor, MD22 mi1.8 hrsno data mi86°F63°F46%1016.4 hPa
College Park Airport, MD23 mi58 minNNW 310.00 miPartly Cloudy84°F64°F52%1016.6 hPa

Wind History from NAK (wind in knots)
1 day agoN12
2 days agoN10N9N8N7N6N5NE6NE7NE7NE10

Tide / Current Tables for Annapolis (US Naval Academy), Severn River, Maryland
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Annapolis (US Naval Academy)
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Thu -- 12:24 AM EDT     0.45 feet Low Tide
Thu -- 06:35 AM EDT     1.58 feet High Tide
Thu -- 06:52 AM EDT     Sunrise
Thu -- 08:09 AM EDT     Moonrise
Thu -- 12:49 PM EDT     0.39 feet Low Tide
Thu -- 07:04 PM EDT     Sunset
Thu -- 07:06 PM EDT     1.58 feet High Tide
Thu -- 08:11 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Tide / Current Tables for Baltimore Harbor Approach, Maryland Current
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Baltimore Harbor Approach
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Thu -- 12:29 AM EDT     -0.95 knots Max Ebb
Thu -- 03:37 AM EDT     0.00 knots Slack
Thu -- 06:36 AM EDT     0.87 knots Max Flood
Thu -- 06:52 AM EDT     Sunrise
Thu -- 08:08 AM EDT     Moonrise
Thu -- 09:36 AM EDT     -0.00 knots Slack
Thu -- 12:42 PM EDT     -0.92 knots Max Ebb
Thu -- 03:43 PM EDT     0.00 knots Slack
Thu -- 06:57 PM EDT     1.03 knots Max Flood
Thu -- 07:03 PM EDT     Sunset
Thu -- 08:10 PM EDT     Moonset
Thu -- 10:11 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Weather Map and Satellite Images
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Weather Map
IR Satellite Image from GEOS

GOES Local Image of Mid-Atlantic    EDIT

Wind Forecast for Baltimore, MD/Washington (15,3,4,5)
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Ground Weather Radar Station Dover AFB, DE
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weather_mapweather_map weather_map

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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 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 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.