Sunday, June25, 2017 L-36.com


Marine Weather and Tides
Severna Park, MD

Version 3.4
What's New / NOTES
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 5:40AMSunset 8:37PM Sunday June 25, 2017 4:47 AM EDT (08:47 UTC) Moonrise 6:27AMMoonset 9:05PM 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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ANZ538 Patapsco River Including Baltimore Harbor- 432 Am Edt Sun Jun 25 2017
.small craft advisory in effect from 1 pm edt this afternoon through this evening...
Rest of the overnight..NW winds 5 kt. Waves less than 1 ft.
Today..W winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
Tonight..NW winds 5 to 10 kt. Gusts up to 20 kt until early morning. Waves 1 ft.
Mon..W winds 5 to 10 kt. Waves 1 ft or less.
Mon night..W winds 5 to 10 kt. Waves 1 ft or less.
Tue..W winds 5 to 10 kt. Waves 1 ft or less.
Tue night..NW winds 5 kt. Waves less than 1 ft.
Wed..SW winds 5 kt. Waves less than 1 ft.
Thu..SW winds 5 to 10 kt. Waves 1 ft.
ANZ500 432 Am Edt Sun Jun 25 2017
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will build from the west through Tuesday night as a series of weak cold fronts cross the chesapeake bay region. The high pressure center will then move over the area Wednesday before shifting into the atlantic Thursday. Small craft advisory conditions are possible over portions of the waters Monday and Tuesday.

7 Day Forecast for Marine Location Near Severna Park, MD
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location: 39.07, -76.57     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 250806
afdlwx
area forecast discussion
national weather service baltimore md washington dc
405 am edt Sun jun 25 2017

Synopsis
High pressure to the west will remain in overall control through
Tuesday, but a series of weak cold fronts will be crossing the
region during this time. The high will then cross the region
Wednesday and settle over the western atlantic ocean late in the
week.

Near term through tonight
One cold front sits off to our southeast at present while
several more are located to our northwest. One of them will
cross the region late today into this evening, but with little
forcing aloft and limited moisture, no precip is expected. It
will simply bring a reinforcing shot of cooler and drier air
southward, with otherwise partly to mostly sunny skies
prevailing today and remaining clear to partly cloudy tonight.

Highs will be in the low to mid 80s with dew points in the
50s... Quite nice for late june. Lows tonight will be mostly in
the 50s except 60s in the cities and along the bay shore.

Short term Monday through Tuesday night
Another reinforcing shot of cooler air pushes south across the
area late Monday into Monday night. Forcing remains weak and
moisture remains limited so think precip will be hard to come
by. Clouds may be a bit more common though. Highs will slip down a
bit more with upper 70s to low 80s common. Dew points will slip into
the upper 40s during part of the day. Lows Monday night will drop
back into the 50s most spots, but still 60s in the warmest locales.

Strong upper trough will cross the region Tuesday with another
surface boundary. This trough is probably the most interesting
weather through the forecast period, with increased instability
associated with it. Some guidance is still dry with it (the
canadian suite), but others, including the NAM and ecmwf, are
rather convective, so we could definitely see some scattered
showers and thunderstorms given the cold pool aloft and decent
pva. For now have kept pops rather low east of the mountains,
but may need to be bumped if guidance comes into better
agreement. Highs Tuesday will be quite cool, with most places
failing to reach 80. Dew points will be slightly higher, with
most places staying in the 50s. Clearing Tuesday night behind
the trough, with lows into the 50s in most places, except near
60 in the cities and bay shore and 40s in the mountains.

Long term Wednesday through Saturday
The upper level trough axis shifts east of the mid-atlantic
Tuesday night per global guidance consensus. The trailing
surface low will then be overhead Wednesday before shifting
offshore later that day. The streak of below normal temperatures
end Thursday with the return southerly flow that begins
Wednesday night.

The high becomes centered over bermuda with a return to summer-
like conditions (max temps around 90f) Thursday into the
weekend. The jet stream and associated low pressure looks to
stay north of the central mid-atlantic over the great lakes
through the weekend with continued low chance probabilities for
precipitation.

Aviation 08z Sunday through Thursday
Vfr through the period with winds generally below 18 knots.

Main concern will be an isolated shower or thunderstorm on
Tuesday. Otherwise, no significant winds, precipitation,
visibility or ceiling limitations expected.

Marine
Winds below SCA criteria currently, but with deeper mixing and
another weak boundary passing through, expect some gusts to
marginal SCA levels later today. Therefore have maintained sca
as inherited. Considered adding upper tidal potomac but
confidence still not there for gusts this afternoon. It will be
close, however.

There is concern again for marginal SCA on Monday with another
weak boundary and good mixing, but given marginal event
expected, did not raise headlines yet.

On Tuesday, a passing trough may cause spotty showers and
thunderstorms, and given dry environment overall, some gusty
winds could accompany them.

Tranquil and cool weather Wednesday under surface high
pressure. Return southerly flow begins Wednesday night as the
high shifts to bermuda.

Lwx watches warnings advisories
Dc... None.

Md... None.

Va... None.

Wv... None.

Marine... Small craft advisory from 1 pm this afternoon to 10 pm edt
this evening for anz530>532-538>540.

Synopsis... Rcm
near term... Rcm
short term... Rcm
long term... Baj
aviation... Baj rcm
marine... Baj rcm


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
APAM2 - 8575512 - Annapolis, MD 8 mi48 min 74°F 1013.6 hPa (+0.0)
44063 - Annapolis 10 mi38 min NW 7.8 G 12 76°F 1014.2 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 11 mi48 min WNW 7 G 8.9 76°F 1013.8 hPa (+0.0)
CPVM2 11 mi48 min 75°F 63°F
FSNM2 11 mi48 min NW 9.9 G 11 76°F 1014 hPa (+0.0)
44043 - Patapsco, MD 11 mi38 min WNW 7.8 G 9.7 77°F 1 ft1014.7 hPa
TPLM2 - Thomas Point, MD 14 mi48 min WNW 5.1 G 6 74°F 78°F
BLTM2 - 8574680 - Baltimore, MD 14 mi48 min NNW 5.1 G 8 77°F 81°F1013.6 hPa (+0.0)
TCBM2 - 8573364 - Tolchester Beach, MD 20 mi48 min NNW 8 G 11 77°F 80°F1014.4 hPa (-0.0)
BSLM2 - Chesapeake Bay, MD 21 mi138 min Calm 61°F 1014 hPa60°F
WASD2 - 8594900 - Washington, DC 28 mi48 min NW 2.9 G 5.1 74°F 83°F1014.1 hPa (+0.0)
44061 - Upper Potomac, MD 31 mi60 min W 1.9 G 3.9 75°F 82°F1014.8 hPa
44062 - Gooses Reef, MD 36 mi38 min NNW 7.8 G 9.7 78°F 1015.3 hPa
44057 - Susquehanna, MD 42 mi38 min N 3.9 G 5.8 74°F 1013.9 hPa
CA2 - 8571892 - Cambridge, MD 43 mi48 min 72°F 81°F1015.1 hPa (+0.3)
COVM2 - 8577018 - Cove Point LNG Pier, MD 47 mi48 min NW 8 G 9.9 75°F 1015.2 hPa (+0.4)

Wind History for Francis Scott Key Bridge NE Tower, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Annapolis, United States Naval Academy, MD8 mi54 minWNW 510.00 miFair73°F62°F69%1014.1 hPa
Baltimore, Baltimore-Washington International Airport, MD10 mi54 minWNW 610.00 miA Few Clouds69°F60°F73%1014.1 hPa
Fort Meade / Tipton, MD11 mi75 minN 010.00 miFair61°F59°F94%1015.2 hPa
Bay Bridge Field, MD14 mi58 minNW 510.00 miFair75°F62°F65%1014.2 hPa
Baltimore, Inner Harbor, MD15 mi1.9 hrsno data mi78°F59°F52%1014.2 hPa
Baltimore / Martin, MD20 mi75 minN 010.00 miFair70°F60°F73%1014.6 hPa
College Park Airport, MD20 mi76 minN 010.00 miFair66°F59°F80%1014.6 hPa
Camp Springs / Andrews Air Force Base, MD23 mi50 minW 310.00 miFair72°F58°F64%1015 hPa

Wind History from NAK (wind in knots)
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Last 24hrS10W12
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W6W56W12
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W7W7W6NW8NW5W3CalmCalmCalmCalmCalmNW3W4W5
1 day agoS54SW6CalmS7S8SW8S11SW11
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2 days agoCalmN4CalmCalmSE5SE4SE5SE7SE6SE7SE733SW64SW3CalmCalmCalm3SW34SW55

Tide / Current Tables for Cedar Point, Severn River, Maryland
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Cedar Point
Click for Map
Sun -- 12:43 AM EDT     0.13 feet Low Tide
Sun -- 05:41 AM EDT     Sunrise
Sun -- 07:26 AM EDT     1.35 feet High Tide
Sun -- 07:27 AM EDT     Moonrise
Sun -- 02:45 PM EDT     0.20 feet Low Tide
Sun -- 07:50 PM EDT     0.83 feet High Tide
Sun -- 08:36 PM EDT     Sunset
Sun -- 10:04 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.20.10.20.40.711.21.31.31.210.80.60.40.20.20.30.50.60.80.80.80.60.4

Tide / Current Tables for Baltimore Harbor Approach, Maryland Current
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Baltimore Harbor Approach
Click for Map
Sun -- 12:05 AM EDT     -0.74 knots Max Ebb
Sun -- 02:45 AM EDT     0.00 knots Slack
Sun -- 05:41 AM EDT     Sunrise
Sun -- 06:27 AM EDT     1.33 knots Max Flood
Sun -- 07:26 AM EDT     Moonrise
Sun -- 09:54 AM EDT     -0.00 knots Slack
Sun -- 01:13 PM EDT     -1.24 knots Max Ebb
Sun -- 04:52 PM EDT     0.00 knots Slack
Sun -- 07:24 PM EDT     0.66 knots Max Flood
Sun -- 08:35 PM EDT     Sunset
Sun -- 10:03 PM EDT     Moonset
Sun -- 10:07 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.7-0.6-0.30.10.61.11.31.310.5-0.1-0.6-1-1.2-1.2-0.9-0.40.10.40.60.60.40-0.3

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

GOES Local Image of Mid-Atlantic    EDIT
Geos

Wind Forecast for Baltimore, MD/Washington (4,6,7,8)
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Ground Weather Radar Station Dover AFB, DE
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weather_mapweather_map weather_map

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Disclaimer:
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 L-36.com. 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 L-36.com 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.