Saturday, September23, 2017

Marine Weather and Tides
Brooklyn Park, 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 7:02PM Saturday September 23, 2017 8:42 AM EDT (12:42 UTC) Moonrise 9:10AMMoonset 8:15PM Illumination 8% 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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ANZ538 Patapsco River Including Baltimore Harbor- 732 Am Edt Sat Sep 23 2017
Today..N winds 5 kt. Waves flat.
Tonight..N winds 5 kt. Waves flat.
Sun..NE winds 5 kt. Waves flat.
Sun night..N winds around 5 kt. Waves flat.
Mon..NE winds 5 kt. Waves flat.
Mon night..E winds 5 kt. Waves flat.
Tue..NE winds 5 kt. Waves flat.
Wed..N winds 5 kt. Waves less than 1 ft.
ANZ500 732 Am 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 Brooklyn Park, MD
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location: 39.21, -76.58     debug

Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 230802
area forecast discussion
national weather service baltimore md washington dc
402 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
Have seen some patchy, locally dense fog early this morning,
especially in the frederick, maryland area, and in the
manassas-warrenton corridor of northern virginia. It would
probably be more widespread, but some high clouds remain over
the shenandoah valley and potomac highlands.

Once the fog burns off this morning, 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 06z Saturday through Wednesday
MVFR visibility possible at cho mrb iad this morning and again
tonight. Otherwise,VFR with light winds and just a few clouds
through the valid TAF period, and continuing through Monday.

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.

Outlook... Dc will be close to minor threshold with tonight's
tide cycle if current tidal departures rise at all. 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... None.

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... None.

Wv... None.

Marine... None.

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

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 3 mi43 min WNW 6 G 7 69°F 1018.1 hPa (+1.4)
BLTM2 - 8574680 - Baltimore, MD 4 mi43 min N 2.9 G 5.1 70°F 78°F1017.8 hPa (+1.3)
44043 - Patapsco, MD 11 mi33 min NNW 7.8 G 7.8 72°F 1 ft1018.7 hPa
APAM2 - 8575512 - Annapolis, MD 17 mi43 min 72°F 1017.5 hPa (+1.4)
44063 - Annapolis 18 mi33 min N 7.8 G 9.7 70°F 1017.8 hPa
CPVM2 18 mi43 min 71°F 61°F
TCBM2 - 8573364 - Tolchester Beach, MD 18 mi43 min N 8.9 G 9.9 71°F 76°F1018.3 hPa (+1.5)
TPLM2 - Thomas Point, MD 23 mi43 min NW 6 G 6 68°F 75°F
BSLM2 - Chesapeake Bay, MD 30 mi133 min NW 1 53°F 1018 hPa53°F
WASD2 - 8594900 - Washington, DC 33 mi43 min W 1.9 G 1.9 68°F 76°F1018.5 hPa (+1.4)
44057 - Susquehanna, MD 35 mi33 min NNW 12 G 14 68°F 1017.9 hPa
44062 - Gooses Reef, MD 46 mi33 min N 7.8 G 9.7 73°F 10 ft1018.2 hPa
CHCM2 - 8573927 - Chesapeake City, MD 46 mi43 min W 1 G 1.9 66°F 75°F1017.8 hPa (+1.2)

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
Baltimore, Inner Harbor, MD5 mi49 minno data mi71°F53°F53%1018.3 hPa
Baltimore, Baltimore-Washington International Airport, MD5 mi49 minW 310.00 miPartly Cloudy63°F59°F87%1018.1 hPa
Baltimore / Martin, MD12 mi56 minN 010.00 miPartly Cloudy64°F59°F83%1018.3 hPa
Fort Meade / Tipton, MD13 mi58 minN 010.00 miFair55°F55°F100%1019 hPa
Annapolis, United States Naval Academy, MD17 mi49 minNW 510.00 miFair71°F62°F73%1018.2 hPa
Bay Bridge Field, MD21 mi63 minNNW 410.00 miFair70°F62°F78%1017.9 hPa
College Park Airport, MD24 mi58 minN 010.00 miFair59°F57°F94%1018.3 hPa

Wind History from DMH (wind in knots)
Last 24hr------------------------------------------------
1 day ago------------------------------------------------
2 days ago------------------------------------------------

Tide / Current Tables for Hawkins Point, Patapsco River, Maryland
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Hawkins Point
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Sat -- 04:02 AM EDT     0.58 feet Low Tide
Sat -- 06:54 AM EDT     Sunrise
Sat -- 09:18 AM EDT     1.59 feet High Tide
Sat -- 10:09 AM EDT     Moonrise
Sat -- 03:40 PM EDT     0.37 feet Low Tide
Sat -- 07:01 PM EDT     Sunset
Sat -- 09:15 PM EDT     Moonset
Sat -- 10:00 PM EDT     1.86 feet High Tide
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 (8,2,3,4)
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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.