Saturday, October21, 2017

Marine Weather and Tides
Naval Academy 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 7:21AMSunset 6:19PM Saturday October 21, 2017 11:49 AM EDT (15:49 UTC) Moonrise 7:56AMMoonset 6:47PM Illumination 2% 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- 1031 Am Edt Sat Oct 21 2017
Rest of today..E winds 5 kt. Waves flat.
Tonight..SE winds 5 kt. Waves less than 1 ft.
Sun..SE winds around 5 kt. Waves 1 ft or less.
Sun night..SE winds 5 kt. Waves less than 1 ft.
Mon..S winds 5 to 10 kt. Waves 1 ft.
Mon night..S winds 10 to 15 kt. Gusts up to 25 kt after midnight. Waves 1 to 2 ft. Showers likely.
Tue..S winds 15 to 20 kt...becoming sw 10 to 15 kt in the evening, then becoming W 5 to 10 kt after midnight. Waves 3 ft...subsiding to 1 ft after midnight. Showers.
Wed..NW winds 5 to 10 kt. Waves 1 ft. A chance of showers in the morning.
ANZ500 1031 Am Edt Sat Oct 21 2017
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will move east of the waters through Monday. A low pressure system will affect the region Tuesday. A small craft advisory is likely for portions of the waters Monday through Tuesday. Gales are also possible for portions of the waters on Tuesday.

7 Day Forecast for Marine Location Near Naval Academy, MD
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location: 38.99, -76.47     debug

Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 211421 aaa
area forecast discussion... Updated
national weather service baltimore md washington dc
1021 am edt Sat oct 21 2017

High pressure will move east into the western atlantic through
Monday. Low pressure and its attendant cold front will sweep
through the area Tuesday. Troughing will remain overhead for
much of the second half of the week.

Near term through tonight
High pressure will remain in control through the weekend. Highs
in the mid 70s with increasing high clouds in the afternoon.

Short term Sunday through Monday night
Ridging shifts eastward into the north atlantic during the
second half of the weekend. Meanwhile, an amplifying ridge over
western noam will result in lowering heights over the eastern
half of the CONUS by late Monday. Southern stream shortwave
moving northeastward out of the lower mississippi river valley
will interact phase with digging northern stream wave crossing
the great lakes resulting in the development of a surface low
which will bring widespread (much needed) rain to the area
starting late Monday night. Until then, only a modest and
gradual increase in clouds with above normal temperatures will

Long term Tuesday through Friday
The big story in the long term will happen right off the bat as
a cold front crosses the region. Have upped the pops to 90%. The
question at the moment is one of timing - models actually appear
to favor the first part of the day for precip while the
numerical guidance is more in the afternoon. For now will keep
pops at 90 for the entire period. Fine tuning will come later.

If this does come through earlier this will limit thunderstorm

Highs Tuesday should reach the lower 70s. Afterwards mid
atlantic will be on the backside of upper level cyclonic flow.

This will bring temperatures back down to more normal later
october values: highs in the 60s, low in the 40s.

Aviation 14z Saturday through Wednesday
Lower ceilings possible by late Monday night as low pressure
approaches and atmosphere moistens. Showers develop west to east
late Monday night. Low-level wind shear is possible as well by
Tuesday morning as a southerly low-level jet (~40 knots at 2kft)
develops. Latest model guidance remains consistent and in
reasonably good agreement at this time range.

Tuesday will be an interesting day as a cold front brings
showers and isolated thuderstorms to all TAF sites. Periods of
sub-vfr ceilings will be likely, as well as the potential for
low level speed shear as well as a wind shift.

Conditions should improve Tuesday night and Wednesday.

Light winds are expected as high pressure remains in control
of the weather over the waters through the weekend. Small craft
advisories may be needed as early as Monday afternoon due to
tightening pressure gradient increasing southerly winds ahead of
developing low pressure.

Tuesday winds will definitely reach SCA levels with the
potential for gales, especially on the wider part of the md
ches bay. SCA will continue to be possible Tuesday night and

Lwx watches warnings advisories
Dc... None.

Md... None.

Va... None.

Wv... None.

Marine... None.

Update... Lfr
products... Dfh woody!

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
APAM2 - 8575512 - Annapolis, MD 1 mi49 min 66°F 1027.8 hPa (+1.3)
44063 - Annapolis 2 mi39 min E 1.9 G 3.9 65°F 1 ft1027.7 hPa
CPVM2 4 mi49 min 64°F 59°F
TPLM2 - Thomas Point, MD 7 mi49 min NNE 4.1 G 4.1 63°F 67°F
44043 - Patapsco, MD 12 mi39 min Calm G 1.9 63°F 1 ft1029.2 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 16 mi49 min SSE 1.9 G 1.9 64°F 1028.4 hPa (+1.4)
BSLM2 - Chesapeake Bay, MD 19 mi79 min NNW 1.9 55°F 1028 hPa48°F
BLTM2 - 8574680 - Baltimore, MD 20 mi49 min S 1 G 4.1 66°F 70°F1028 hPa (+1.4)
TCBM2 - 8573364 - Tolchester Beach, MD 20 mi49 min NNW 2.9 G 2.9 64°F 65°F1028.4 hPa (+1.2)
WASD2 - 8594900 - Washington, DC 30 mi49 min SW 1.9 G 2.9 68°F 67°F1028.3 hPa (+1.2)
44062 - Gooses Reef, MD 30 mi39 min NE 5.8 G 7.8 66°F 1034 hPa
CA2 - 8571892 - Cambridge, MD 36 mi49 min 65°F 67°F1029.1 hPa (+1.6)
COVM2 - 8577018 - Cove Point LNG Pier, MD 41 mi49 min NNE 5.1 G 7 65°F 1028.9 hPa (+1.5)
44057 - Susquehanna, MD 43 mi39 min WNW 1.9 G 1.9 65°F 1028.2 hPa
SLIM2 - 8577330 - Solomons Island, MD 46 mi49 min WSW 4.1 G 5.1 69°F 69°F1027.8 hPa (+1.5)

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 mi1.9 hrsN 010.00 miFair65°F54°F68%1028.4 hPa
Bay Bridge Field, MD7 mi69 minN 010.00 miFair66°F53°F64%1028.4 hPa
Fort Meade / Tipton, MD17 mi64 minN 010.00 miFair64°F48°F56%1029.1 hPa
Baltimore, Baltimore-Washington International Airport, MD17 mi55 minE 410.00 miPartly Cloudy68°F44°F42%1028.2 hPa
Baltimore, Inner Harbor, MD21 mi1.9 hrsno data mi64°F46°F54%1028.2 hPa
Baltimore / Martin, MD24 mi64 minN 010.00 miClear66°F53°F64%1028.8 hPa
College Park Airport, MD24 mi64 minN 010.00 miFair66°F47°F51%1028.1 hPa
Camp Springs / Andrews Air Force Base, MD24 mi53 minE 310.00 miFair69°F44°F42%1028.1 hPa

Wind History from BWI (wind in knots)
Last 24hrNW6NW64NW86NW73NW34W3W3NW3NW3SW3CalmCalmCalmW3CalmCalmW3CalmCalmE4
1 day agoSW7SW66W5S4SW4SW4S4SW3SW3SW3W3W3W5CalmCalmW4W6W5W6W5W6W6NW9
2 days agoSW4S53S4S6SW4S3SW3S3CalmCalmW3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSW4S6

Tide / Current Tables for Annapolis (US Naval Academy), Severn River, Maryland
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Annapolis (US Naval Academy)
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Sat -- 12:57 AM EDT     0.45 feet Low Tide
Sat -- 06:39 AM EDT     1.24 feet High Tide
Sat -- 07:21 AM EDT     Sunrise
Sat -- 08:55 AM EDT     Moonrise
Sat -- 12:50 PM EDT     0.21 feet Low Tide
Sat -- 06:18 PM EDT     Sunset
Sat -- 07:27 PM EDT     1.56 feet High Tide
Sat -- 07:47 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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Sat -- 01:00 AM EDT     -1.02 knots Max Ebb
Sat -- 04:27 AM EDT     0.00 knots Slack
Sat -- 07:07 AM EDT     0.66 knots Max Flood
Sat -- 07:21 AM EDT     Sunrise
Sat -- 08:55 AM EDT     Moonrise
Sat -- 09:55 AM EDT     -0.00 knots Slack
Sat -- 12:52 PM EDT     -0.72 knots Max Ebb
Sat -- 03:39 PM EDT     0.00 knots Slack
Sat -- 06:18 PM EDT     Sunset
Sat -- 07:09 PM EDT     1.07 knots Max Flood
Sat -- 07:47 PM EDT     Moonset
Sat -- 10:30 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 (11,2,3,4)
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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.