Saturday, September23, 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 6:54AMSunset 7:01PM Saturday September 23, 2017 2:13 PM EDT (18:13 UTC) Moonrise 9:09AMMoonset 8:15PM Illumination 10% Phase: Waxing Crescent; Moon at 3 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 Sat Sep 23 2017
This afternoon..NE winds 5 kt. Waves less than 1 ft.
Tonight..NW winds 5 kt. Waves less than 1 ft.
Sun..NE winds 5 kt. Waves less than 1 ft.
Sun night..NE winds around 5 kt. Waves flat.
Mon..NE winds 5 kt. Waves less than 1 ft.
Mon night..E winds 5 to 10 kt. Waves 1 ft.
Tue..NE winds 5 to 10 kt. Waves 1 ft.
Wed..N winds 5 to 10 kt. Waves 1 ft.
ANZ500 131 Pm Edt Sat Sep 23 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. Small craft advisories may be needed Tuesday and Wednesday as hurricane maria approaches north carolina. Refer to the latest statements from the national hurricane center for up-to-date information on hurricane maria.

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 231350
area forecast discussion
national weather service baltimore md washington dc
950 am edt Sat sep 23 2017

Surface and upper level high pressure will remain in place through
the weekend and into early next week. The high will slowly
weaken its grip over the area by the middle of the week as
hurricane maria moves northward through the western atlantic.

Near term through tonight
Aside from a tiny patch around shd, all early morning fog has
burnt off. No changes required to the going forecast. It will be
another largely sunny and unseasonably warm day. Highs should
be at least a couple degrees warmer than yesterday... Mostly in
the mid 80s. Overnight, another possibility for patchy fog to
develop with lows mainly in the 60s, except in the urban
centers, where temperatures may stay around 70.

Short term Sunday through Monday night
On Sunday and Monday, the upper ridge is at its strongest over
our area, which should also yield the warmest (dare I say
hottest?) temperatures of this stretch. Can't rule out that we
hit 90 in some spots. Even 89 degrees would be the warmest we
have seen in over a month. Dewpoints will start creeping upward
too, and that means uncomfortable humidity levels for late
september, but nothing to spark any precipitation through Monday

Long term Tuesday through Friday
The long term period will be dominated by attention to hurricane
maria. On Tuesday, ridge axis will be to our north, with maria
pushing northwest from the south. Latest guidance has shifted a bit
west somewhat, bringing the storm closer to the north carolina outer
banks than previous runs. Guidance now stalls the storm just
southeast of the outer banks Wednesday before the next strong upper
trough and cold front moving in from the northwest finally starts
kicking it out to sea on Thursday. While most guidance still does
not show a significant impact in our region, attention should
continue to be paid to this storm until it moves safely out to sea.

Please refer to the latest products from the national hurricane
center for the most up-to-date information on hurricane maria.

Behind the cold front (which could bring a few showers regardless of
what maria does), temperatures will drop significantly Friday into
Saturday. The long september warm spell looks likely to end.

Aviation 14z Saturday through Wednesday
Vfr with light winds and just a few clouds through the valid
taf period, and continuing through Monday. Only exception will
be perhaps some early morning low clouds fog, primarily
affecting cho mrb.

Attention will be on hurricane maria during Tuesday and Wednesday.

While subVFR conditions are not likely, a gusty northwest breeze of
15-20 knots is possible, as are a few showers. A further deviation
northwest in the track of maria could bring worse conditions. Refer
to latest NHC statements for up-to-date information on maria.

High pressure will allow for light winds around 10 knots or less
through the weekend. Perhaps some patchy fog on the waters

Sca winds looking likely across the waters on Tuesday and Wednesday
as hurricane maria approaches and we get enveloped by its expanding
wind field. A few showers will also be possible. If the storm's
track deviates further northwest, more significant impacts are
possible (though not likely). Refer to latest NHC statements for up-
to-date information on maria.

Tides coastal flooding
September is always a prime month for tidal flooding and this
is proving to be no exception. Minor coastal flooding is
forecast to persist through this morning's tide cycle and likely
this afternoon's tide cycle from annapolis southward on the
western shore of the bay and on the lower tidal potomac. Since
departures have not yet decreased, needed to add washington dc
and alexandria to the list of sites requiring coastal flood
advisories; went for today and tonight for starters.

Straits point (st. Mary's potomac side) will likely continue to
see tidal flooding around high tide through at least the Sunday
afternoon tide cycle. Elsewhere, things are more in question
due to the light winds. Local research has shown that in light
wind regimes, the tidal anomaly locally is more controlled by
what's coming in to the lower bay. Those anomalies are currently
higher than what we have locally, and seem unlikely to drop
much, so our forecast might prove to be optimistically low on
Sunday Monday.

Lwx watches warnings advisories
Dc... Coastal flood advisory until 2 am edt Sunday for dcz001.

Md... Coastal flood advisory until 10 pm edt this evening for mdz018.

Coastal flood advisory until 1 am edt Sunday for mdz014.

Coastal flood advisory until 9 pm edt this evening for mdz017.

Va... Coastal flood advisory until 2 am edt Sunday for vaz054.

Wv... None.

Marine... None.

Synopsis... Je
near term... Je hts
short term... Je
long term... Rcm
aviation... Je hts rcm
marine... Je rcm
tides coastal flooding... Je hts

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
APAM2 - 8575512 - Annapolis, MD 1 mi44 min 80°F 1017.6 hPa
44063 - Annapolis 2 mi34 min ENE 5.8 G 9.7 79°F 1017.2 hPa
CPVM2 4 mi44 min 79°F 65°F
TPLM2 - Thomas Point, MD 7 mi74 min N 9.9 G 11 77°F 76°F
44043 - Patapsco, MD 12 mi34 min Calm G 1.9 78°F 1019.3 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 16 mi44 min NNW 2.9 G 5.1 81°F 1018.2 hPa
BSLM2 - Chesapeake Bay, MD 19 mi104 min N 2.9 78°F 1019 hPa62°F
BLTM2 - 8574680 - Baltimore, MD 20 mi44 min NNE 6 G 9.9 82°F 78°F1017.8 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 20 mi44 min N 5.1 G 6 79°F 75°F1018.4 hPa
WASD2 - 8594900 - Washington, DC 30 mi44 min NE 4.1 G 9.9 84°F 75°F1018.3 hPa
44062 - Gooses Reef, MD 30 mi34 min N 14 G 16 77°F 1018.6 hPa
CA2 - 8571892 - Cambridge, MD 36 mi44 min 82°F 77°F1018.5 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 41 mi44 min N 12 G 16 76°F 1018.8 hPa
44057 - Susquehanna, MD 43 mi34 min NNW 9.7 G 14 82°F 1018 hPa
SLIM2 - 8577330 - Solomons Island, MD 46 mi44 min N 8.9 G 13 78°F 76°F1017.6 hPa

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 mi80 minN 710.00 miFair82°F64°F56%1018.7 hPa
Bay Bridge Field, MD7 mi94 minN 610.00 miFair81°F62°F54%1019 hPa
Fort Meade / Tipton, MD17 mi89 minWNW 610.00 miFair81°F60°F51%1019.6 hPa
Baltimore, Baltimore-Washington International Airport, MD17 mi80 minNW 710.00 miPartly Cloudy84°F61°F46%1018.3 hPa
Baltimore, Inner Harbor, MD21 mi80 minno data mi84°F62°F48%1018.5 hPa
Baltimore / Martin, MD24 mi89 minNNW 310.00 miA Few Clouds84°F64°F51%1019 hPa
College Park Airport, MD24 mi89 minN 510.00 miFair81°F61°F51%1019 hPa
Camp Springs / Andrews Air Force Base, MD24 mi2.3 hrsNNE 610.00 miFair80°F61°F52%1019.4 hPa

Wind History from NAK (wind in knots)
Last 24hrNW5NW8N7NW3CalmCalmCalmCalmNW3CalmN5NW3CalmW3NW3W3N5NW5NW6NW6N6N7N7N4
1 day agoN5SE6SE7SE6CalmCalmCalmCalmCalmCalmNW3NW3NW3N4N4N5N4N4N4NW3CalmN4NW6NW4
2 days agoNW7NW5NW4NW5CalmNW3CalmNW4CalmNW3NW3NW5CalmNW4NW3NW4NW3NW4NW3NW4NW3NW4N4N3

Tide / Current Tables for Annapolis (US Naval Academy), Severn River, Maryland
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Annapolis (US Naval Academy)
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Sat -- 02:01 AM EDT     0.57 feet Low Tide
Sat -- 06:54 AM EDT     Sunrise
Sat -- 07:49 AM EDT     1.42 feet High Tide
Sat -- 10:09 AM EDT     Moonrise
Sat -- 02:05 PM EDT     0.36 feet Low Tide
Sat -- 07:00 PM EDT     Sunset
Sat -- 08:37 PM EDT     1.62 feet High Tide
Sat -- 09:15 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 -- 02:04 AM EDT     -0.93 knots Max Ebb
Sat -- 05:21 AM EDT     0.00 knots Slack
Sat -- 06:54 AM EDT     Sunrise
Sat -- 08:09 AM EDT     0.71 knots Max Flood
Sat -- 10:08 AM EDT     Moonrise
Sat -- 11:01 AM EDT     -0.00 knots Slack
Sat -- 02:05 PM EDT     -0.78 knots Max Ebb
Sat -- 05:00 PM EDT     0.00 knots Slack
Sat -- 07:00 PM EDT     Sunset
Sat -- 08:23 PM EDT     1.00 knots Max Flood
Sat -- 09:15 PM EDT     Moonset
Sat -- 11:43 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 (14,3,4,5)
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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.