Wednesday, September20, 2017 L-36.com


Marine Weather and Tides
Baltimore Highlands, 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 6:51AMSunset 7:07PM Wednesday September 20, 2017 12:26 PM EDT (16:26 UTC) Moonrise 6:07AMMoonset 6:39PM Illumination 0% Phase: New Moon; Moon at 29 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- 1032 Am Edt Wed Sep 20 2017
Rest of today..NW winds 10 kt. Waves 1 ft.
Tonight..N winds 5 kt. Waves less than 1 ft.
Thu..N winds 5 kt. Waves flat.
Thu night..N winds around 5 kt. Waves flat.
Fri..N winds around 5 kt. Waves flat.
Fri night..N winds around 5 kt. Waves 1 ft or less.
Sat..N winds 5 kt. Waves flat.
Sun..N winds around 5 kt. Waves 1 ft.
ANZ500 1032 Am Edt Wed Sep 20 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 Baltimore Highlands, MD
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location: 39.26, -76.6     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 201333
afdlwx
area forecast discussion
national weather service baltimore md washington dc
933 am edt Wed sep 20 2017

Synopsis
A ridge of high pressure will remain over the eastern united
states through early next week. Hurricane maria may approach the
coast of the carolinas by the middle of next week.

Near term through tonight
Upper-level ridge axis remains overhead this morning while an
upper-level disturbance approaches from the west. A deformation
zone overhead has allowed for mid-level clouds over the metro
areas this morning. A few sprinkles cannot be ruled out... But
clouds are expected to dissipate across these areas this
afternoon as deformation zone weakens.

A few popup showers are possible this afternoon into this
evening across the potomac highlands into the central shenandoah
valley as the upper-level disturbance approaches from the west.

However... Instability will be limited and forcing with this
system is quite weak. Therefore... Much of the time should turn
out dry. Elsewhere... Partly to mostly sunny skies are expected
this afternoon and it will turn out quite warm with the upper-
level ridge overhead. MAX temps will be in the mid to upper 80s
across most locations.

High pressure both at the surface and aloft will build over the
region as the upper-level disturbance shifts to the south
tonight. Patchy fog will again be a concern. Lows will be
mainly in the 60s.

Short term Thursday through Friday night
Northeast flow aloft will dominate Thursday through Friday night
as ridge builds to our west and jose stalls to the east. Jose
should have little to no effect on our weather during this time,
so it will be unseasonably warm and humid, but dry, with the
ridging preventing any convection. Highs will be in the mid to
upper 80s, with lows in the 60s. Patchy late night and early
morning fog will be the main forecast concern, mainly in the
more rural, inland locations.

Long term Saturday through Tuesday
Ridge of high pressure will gradually strengthen through early
next week. Latest euro is much stronger than gfs GEFS with the
h5 ridge showing a 591 decameter ridge. No wx is expected as a
result. The first half of next week, flow will turn more onshore
north of hurricane maria. Latest euro has trended westward and
slower with the track of maria bringing it closer to the nc
outerbanks, but so far models have been inconsistent on track
longitude thus far, limiting confidence. Please refer to NHC for
the latest on maria.

Aviation 13z Wednesday through Sunday
Vfr conditions are expected through this evening with high
pressure in control.

Patchy fog will be a concern again over the next several late
night and early morning periods thanks to persistent high
pressure and light winds. Best odds same as early this morning
as described above. Other than that, should beVFR thru Friday
night.

Vfr conditions through Sun with no sig wx.

Marine
Will continue with the SCA for the middle portion of the bay and
lower tidal potomac river through late this morning... But it
will be marginal. Jose will move away from the area this
afternoon. Gusts will be close to SCA criteria... But the
forecast has them capped around 15 knots for now due to a
weakening gradient.

From tonight through Friday night, high pressure and light winds
will dominate, with no SCA concerns at present.

Light winds through the weekend. Winds will start strengthening
during the first half of next week as pressure gradient tightens
in response to approaching hurricane maria.

Tides coastal flooding
Water piled up near the mouth of the bay from jose over the
past couple days. Those anomalies have spread across the bay
and tidal potomac river. Anomalies over 1 foot above normal
remain across the entire bay... So elevated water levels are
likely to continue for at least the next couple tide cycles
through tonight... Despite an offshore flow. Coastal flood
advisories are in effect from annapolis southward and across the
upper tidal potomac river. A coastal flood warning is in effect
for st marys county where moderate flooding is expected.

Guidance continues to show elevated water levels for Thursday as
well.

Lwx watches warnings advisories
Dc... Coastal flood advisory until 11 am edt this morning for dcz001.

Md... Coastal flood advisory until 6 pm edt this evening for mdz018.

Coastal flood advisory until 10 pm edt this evening for mdz014.

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

Va... Coastal flood advisory until 11 am edt this morning for vaz054.

Wv... None.

Marine... Small craft advisory until noon edt today for anz533-534-537-
541-543.

Synopsis... Lfr
near term... Bjl rcm
short term... Rcm
long term... Lfr
aviation... Bjl rcm lfr
marine... Bjl rcm lfr
tides coastal flooding... Bjl


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BLTM2 - 8574680 - Baltimore, MD 1 mi39 min N 8 G 9.9 78°F 78°F1013.6 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 5 mi39 min NNW 11 G 14 76°F 1013.8 hPa
44043 - Patapsco, MD 13 mi37 min N 9.7 G 14 76°F 1014.8 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 19 mi39 min NNW 12 G 13 76°F 75°F1014.2 hPa
APAM2 - 8575512 - Annapolis, MD 20 mi39 min 79°F 1013.4 hPa
CPVM2 21 mi39 min 78°F 68°F
44063 - Annapolis 22 mi37 min N 12 G 14 77°F 1013.2 hPa
TPLM2 - Thomas Point, MD 26 mi27 min NNW 11 G 13 77°F 75°F
BSLM2 - Chesapeake Bay, MD 34 mi117 min W 2.9 74°F 1014 hPa64°F
44057 - Susquehanna, MD 34 mi37 min NNW 9.7 G 12 77°F 1013.5 hPa
WASD2 - 8594900 - Washington, DC 35 mi39 min WNW 5.1 G 7 78°F 74°F
CHCM2 - 8573927 - Chesapeake City, MD 46 mi45 min N 7 G 11 78°F 76°F1013.6 hPa

Wind History for Baltimore, MD
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N8
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Baltimore, Inner Harbor, MD1 mi33 minno data mi82°F64°F56%1013.9 hPa
Baltimore, Baltimore-Washington International Airport, MD6 mi33 minNW 610.00 miMostly Cloudy80°F66°F64%1013.9 hPa
Baltimore / Martin, MD11 mi42 minNW 910.00 miMostly Cloudy81°F69°F70%1014.2 hPa
Fort Meade / Tipton, MD15 mi42 minNW 610.00 miFair81°F64°F58%1015.2 hPa
Annapolis, United States Naval Academy, MD20 mi93 minNW 810.00 miPartly Cloudy79°F66°F67%1014.2 hPa
Bay Bridge Field, MD24 mi47 minNW 710.00 miFair77°F68°F74%1013.9 hPa

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

Tide / Current Tables for Middle Branch, Baltimore Harbor, Maryland
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Middle Branch
Click for Map
Wed -- 01:30 AM EDT     New Moon
Wed -- 01:50 AM EDT     0.38 feet Low Tide
Wed -- 06:52 AM EDT     Sunrise
Wed -- 07:07 AM EDT     Moonrise
Wed -- 07:45 AM EDT     1.63 feet High Tide
Wed -- 02:28 PM EDT     0.38 feet Low Tide
Wed -- 07:06 PM EDT     Sunset
Wed -- 07:40 PM EDT     Moonset
Wed -- 08:09 PM EDT     1.55 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.40.40.50.71.11.41.61.61.51.310.80.50.40.40.60.91.21.41.51.51.31.1

Tide / Current Tables for Baltimore Harbor Approach, Maryland Current
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Baltimore Harbor Approach
Click for Map
Wed -- 01:30 AM EDT     New Moon
Wed -- 02:43 AM EDT     0.00 knots Slack
Wed -- 05:49 AM EDT     0.93 knots Max Flood
Wed -- 06:51 AM EDT     Sunrise
Wed -- 07:06 AM EDT     Moonrise
Wed -- 08:53 AM EDT     -0.00 knots Slack
Wed -- 12:00 PM EDT     -0.96 knots Max Ebb
Wed -- 03:05 PM EDT     0.00 knots Slack
Wed -- 06:14 PM EDT     0.99 knots Max Flood
Wed -- 07:05 PM EDT     Sunset
Wed -- 07:38 PM EDT     Moonset
Wed -- 09:23 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.9-0.7-0.30.10.60.90.90.80.4-0.1-0.5-0.8-1-0.8-0.5-00.40.810.90.60.2-0.3-0.7

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 (12,3,4,5)
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Ground Weather Radar Station Dover AFB, DE
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weather_mapweather_map weather_map

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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.