Wednesday, May23, 2018

Marine Weather and Tides
Tilghman Island, MD

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:43AMSunset 8:18PM Wednesday May 23, 2018 6:18 PM EDT (22:18 UTC) Moonrise 1:21PMMoonset 1:43AM Illumination 66% Phase: Waxing Gibbous; Moon at 9 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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ANZ541 Choptank River To Cambridge Md And The Little Choptank River- 431 Pm Edt Wed May 23 2018
.small craft advisory in effect until 6 pm edt this evening...
Rest of this afternoon..NW winds 10 kt with gusts to 20 kt. Waves 1 ft.
Tonight..NW winds 5 kt. Waves less than 1 ft.
Thu..NE winds 5 to 10 kt. Waves 1 ft.
Thu night..S winds 5 to 10 kt. Waves 1 ft.
Fri..S winds 5 to 10 kt. Waves 1 ft.
Fri night..S winds 10 kt. Waves 1 ft.
Sat..SW winds 10 kt. Waves 1 ft. A chance of tstms. A chance of showers.
Sun..S winds 5 to 10 kt. Waves 1 ft. A chance of tstms. A chance of showers. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 431 Pm Edt Wed May 23 2018
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure over the great lakes will build over the mid-atlantic through the end of the week, then move offshore this weekend. Low pressure may approach the area from the south early next week. Small craft advisories may be needed late Friday into the weekend.

7 Day Forecast for Marine Location Near Tilghman Island, MD
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location: 38.71, -76.32     debug

Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 231910
area forecast discussion
national weather service baltimore md washington dc
310 pm edt Wed may 23 2018

High pressure will build into the region from the northwest
late this afternoon through Thursday night. This high should move
offshore Friday. Moisture will increase ahead of a low pressure
system over the weekend into early next week.

Near term through Thursday
A shower in spots across southern maryland, the central
chesapeake bay, or parts of the virginia piedmont is possible as
the cold front pushes across these areas later this afternoon.

A rumble of thunder cannot be ruled out. Any activity should be
very isolated and brief. High temperatures will be in the lower
to middle 80s for most locations.

High pressure will build in from the northwest tonight. Dry
conditions with mainly scattered mid-level clouds expected tonight.

Low temperatures will drop down into the upper 50s to near 60 over
the eastern half of our region, while lows should reach the lower
50s over the western half of our region.

Short term Thursday night through Friday night
The center of high pressure will move overhead later in the day
Thursday into Thursday night before moving offshore Friday. In the
meantime, we can enjoy dry conditions Thursday into Friday.

As we get into late Friday and Friday night and looking out west
into the potomac highlands, we could encounter a shower or
two; otherwise, dry conditions for all.

Dewpoint temperatures will be in the lower 50s Thursday versus the
lower 60s that we experienced this afternoon. This should make
conditions a little more comfortable. Temperatures both Thursday and
Friday will reach the lower to middle 80s with increasing humidity
expected Friday around the back side of the area of high pressure.

Low temperatures Thursday night expected to be in the middle 50s to
upper 50s.

Long term Saturday through Wednesday
Saturday into Sunday, a high pressure system will be located off the
atlantic coast near bermuda. This will lead to a south to
southwesterly flow which will work to funnel tropical moisture
into the region. Temperatures rising up into the mid to upper
80s on Saturday and Sunday coupled with tropical moisture could
lead to the formation of convective showers and thunderstorms
which may produce heavy showers.

Monday through Tuesday, a weak boundary will approach from the west.

A south to southwesterly flow will continue the flow of tropical
moisture into the region. High temperatures will be in the low to
mid 80s on Monday. The approaching frontal boundary on Monday will
act as a convergence zone which may allow for some forcing to cause
the formation of storms and showers. The combination of tropical
moisture and the boundary will lead to a chance for thunderstorms
and showers on Monday.

Aviation 19z Wednesday through Monday
Vfr conditions late this afternoon through Friday night. Winds
have become northwesterly and gusting over 20 knots at times behind
the cold front at all terminals, except for cho, where winds are
generally still light out of the north. Expect winds to diminish
tonight as high pressure builds in over the region.

Saturday, the combination of tropical moisture and rising
temperatures up into the mid 80s will lead to an environment that
could be conducive for the formation of disorganize thunderstorms
and heavy showers.

A small craft advisory is in effect through late this afternoon as
we look at a cold front passing over the waters of the potomac river
and chesapeake bay. For the most part, wind gusts have been between
17 and 22 knots with gusts as high as 26 knots in a few locations.

High pressure will build across the waters tonight and Thursday
before moving offshore on Friday with light winds. Some of the
wider waters of the bay may come close to SCA criteria Friday
night as southerly flow increases on the back side of the high.

On Friday, winds will be out of the south which may lead to the
need for a small craft advisory. Skies should remain most clear with
mild temperatures in the upper 70s to lower 80s. On Saturday, the
influx of tropical moisture will combine with higher
temperatures to allow for the formation of disorganized showers
and thunderstorms.

Tides coastal flooding
Tidal anomalies will continue to decrease this afternoon as
northwesterly winds develop behind a cold front. However, water
levels remain more elevated around dc given some freshwater
input, with the current high tide barely coming in below flood
stage. This situation may repeat itself during the morning high
tides the next couple days.

Lwx watches warnings advisories
Dc... None.

Md... None.

Va... None.

Wv... None.

Marine... Small craft advisory until 6 pm edt this evening for

Synopsis... Klw
near term... Klw
short term... Klw
long term... Jmg
aviation... Klw jmg
marine... Klw jmg
tides coastal flooding... Klw

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44062 - Gooses Reef, MD 12 mi38 min NNE 12 G 14 76°F 1016.2 hPa
TPLM2 - Thomas Point, MD 14 mi78 min NNW 11 G 13 77°F 70°F1016.7 hPa (+0.0)57°F
CA2 - 8571892 - Cambridge, MD 16 mi48 min 80°F 75°F1016.6 hPa
44063 - Annapolis 19 mi38 min NW 9.7 G 14 78°F 1016.1 hPa
CPVM2 20 mi48 min 76°F 61°F
BSLM2 - Chesapeake Bay, MD 21 mi108 min NW 5.1 77°F 1016 hPa58°F
APAM2 - 8575512 - Annapolis, MD 21 mi48 min 78°F 1015.5 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 22 mi48 min N 13 G 14 74°F 1016.3 hPa
SLIM2 - 8577330 - Solomons Island, MD 28 mi48 min NNW 13 G 15 79°F 69°F1015.4 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 35 mi48 min N 11 G 12 74°F 70°F1016.2 hPa
BISM2 - 8571421 - Bishops Head, MD 37 mi48 min NNW 14 G 19 80°F 80°F1016 hPa
FSNM2 37 mi48 min NNW 14 G 17 78°F 1015.8 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 37 mi48 min NNW 13 G 15 78°F 1015.8 hPa
WASD2 - 8594900 - Washington, DC 39 mi48 min NW 6 G 11 82°F 67°F1016.5 hPa
BLTM2 - 8574680 - Baltimore, MD 41 mi48 min N 9.9 G 13 79°F 70°F1015.7 hPa
PPTM2 - 8578240 - Piney Point, MD 41 mi48 min N 14 G 17
NCDV2 47 mi48 min N 5.1 G 11 81°F 75°F1015.1 hPa
44042 - Potomac, MD 47 mi38 min NE 12 G 16 77°F 1014.7 hPa

Wind History for Cambridge, MD
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1 day
2 days

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Easton / Newman Field, MD15 mi28 minN 1010.00 miPartly Cloudy81°F59°F48%1016.9 hPa
Bay Bridge Field, MD18 mi43 minNNW 87.00 miFair77°F62°F61%1015.9 hPa
Cambridge-Dorchester Airport, MD19 mi43 minNW 12 G 1910.00 miA Few Clouds79°F59°F51%1015.6 hPa

Wind History from ESN (wind in knots)
Last 24hrNW4S5----SW4SW4SW6SW4W5CalmSW4Calm--NW4NW10N11
1 day agoSE5SW6S6S4S3S3S5CalmCalmCalmS3CalmCalmSE3SE4S7S6S7S6S10SW6SW7SW7W4
2 days agoSW6SW3CalmCalmCalmCalmCalmN4NE4E9E7E4NE7E7E7

Tide / Current Tables for Avalon, Dogwood Harbor, Maryland
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Click for Map
Wed -- 02:42 AM EDT     Moonset
Wed -- 05:47 AM EDT     Sunrise
Wed -- 05:55 AM EDT     0.55 feet Low Tide
Wed -- 11:26 AM EDT     1.74 feet High Tide
Wed -- 02:21 PM EDT     Moonrise
Wed -- 06:30 PM EDT     0.41 feet Low Tide
Wed -- 08:17 PM EDT     Sunset
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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Wed -- 12:48 AM EDT     0.80 knots Max Flood
Wed -- 02:43 AM EDT     Moonset
Wed -- 04:04 AM EDT     -0.00 knots Slack
Wed -- 05:46 AM EDT     Sunrise
Wed -- 06:56 AM EDT     -0.63 knots Max Ebb
Wed -- 09:50 AM EDT     0.00 knots Slack
Wed -- 12:56 PM EDT     0.70 knots Max Flood
Wed -- 02:21 PM EDT     Moonrise
Wed -- 03:52 PM EDT     -0.00 knots Slack
Wed -- 07:13 PM EDT     -0.88 knots Max Ebb
Wed -- 08:18 PM EDT     Sunset
Wed -- 10:27 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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GOES Local Image of Mid-Atlantic    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Baltimore, MD/Washington (18,4,5,8)
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Ground Weather Radar Station Dover AFB, DE
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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.