Wednesday, September19, 2018

Marine Weather and Tides
Algonquin, MD

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9/17/2018 XTide broke when 1and1 "upgraded" my server. It has been esculated. I am sorry for the problem.

Sunrise 6:48AMSunset 7:06PM Wednesday September 19, 2018 5:13 PM EDT (21:13 UTC) Moonrise 3:19PMMoonset 12:31AM Illumination 74% Phase: Waxing Gibbous; Moon at 10 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- 435 Pm Edt Wed Sep 19 2018
Rest of this afternoon..N winds 10 kt. Waves 1 ft.
Tonight..NE winds 5 to 10 kt. Waves 1 ft.
Thu..SE winds 5 to 10 kt. Waves 1 ft.
Thu night..SE winds 5 to 10 kt. Waves 1 ft.
Fri..S winds 10 to 15 kt. Waves 2 ft.
Fri night..SW winds 10 to 15 kt. Waves 2 ft.
Sat..NE winds 5 to 10 kt. Waves 1 ft. A chance of showers through the night.
Sun..NE winds 5 to 10 kt. Waves 1 ft. A chance of showers.
ANZ500 435 Pm Edt Wed Sep 19 2018
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will build over the waters through Thursday before moving offshore Friday. A cold front will approach from the northwest this weekend, then stall near or just south of the waters.

7 Day Forecast for Marine Location Near Algonquin, MD
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location: 38.59, -76.07     debug

Area Discussion for - Philadelphia/Mount Holly, PA
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Fxus61 kphi 191958
area forecast discussion
national weather service mount holly nj
358 pm edt Wed sep 19 2018

High pressure will continue building in from the north through
Thursday before pushing off the new england coast through early
Friday. A cold front will approach from the north and west on
Friday before passing through the area Friday night and Saturday
morning. The front will then stall just south of our area
through the end of the weekend as high pressure builds to our
north. The high begins pushing offshore through the beginning of
next week.

Near term until 6 am Thursday morning
The remnant low of florence lies about 250 miles SE of atlantic
city, and will continue to move out to sea. An area of low
clouds and stratus over new england continues to drift to the
south and west towards new jersey this evening, and should
overspread the region from east to west later tonight.

Meanwhile, a weak cold front lies just to the north and west of
the local area and will drift through the region tonight.

Winds at kphl have shifted a bit more to the nw, and latest
visible satellite image seems to show a weak boundary that
passed through the city. Clouds thinned out a bit as a result.

Going into this evening, there may be a bit of drying, then
onshore flow will take over after sunset.

With onshore flow continuing to usher abundant low level
moisture into much of the region, there may be enough low level
moisture to wring out some sprinkles, maybe even some spotty
light rain and drizzle, late tonight with the passage of that
cold front. Most of the moisture will be confined to the lower
levels of the atmosphere, generally below 5000 feet, so not
expecting much in the way of measurable qpf, maybe a trace to a
couple hundredths of an inch. Patchy fog possible as well, but
the stratus should keep fog limited.

Lows tonight generally in the low 50s in the southern poconos, and
otherwise in the upper 50s to low 60s, except for philly, which
should be in the mid to upper 60s.

Short term 6 am Thursday morning through 6 pm Thursday
Weak cold front washes out as it crosses the area, and whatever
remains of the front will become nearly stationary just south
of delmarva. With high pressure passing north of the area, winds
take on a northeast flow in the morning that eventually becomes
southeast in the afternoon. This onshore flow looks to keep
abundant low clouds across the region for most of the morning,
then those clouds will gradually lift in the afternoon.

A much cooler day on tap with highs in the low to mid 70s, and
cooler along the shores.

Long term Thursday night through Wednesday
By late Thursday, high pressure will be moving offshore to our north
and east as and upper ridge axis passes to our north. This westerly
flow and dry air aloft should keep the sensible weather dry and
pleasant through early Friday with highs in the 70s to around 80
degrees and lows in the 60s. By Friday evening, a cold front will
begin approaching our region from the north and west bring the
potential for scattered showers and thunderstorms primarily along
and north of i-78. As the front begins moving in to our area,
diurnal instability will be rapidly diminishing resulting in much
lower pops through the overnight hours as it pushes toward the i-95
corridor and points south. The exact timing of this front will
dictate the evolution of convection across our area.

As the front stalls to our south on Saturday, chances for rain
showers will exist across our southern zones along and north of the
boundary. Coverage of showers will be dependent on just how far
south the front stalls, but kept pops largely at slight chance now
due to uncertainty.

Sunday through Wednesday... Stationary front will remain stalled to
our south. There is still some discrepancy as to whether the rain
will remain off to our south, or if it will override into the
southern portions of our area. The ECMWF seems to push the front
farther to the south than the GFS at this point. Walked the middle
of the road and kept the chance for showers over the southern
portions of the area into Monday for now.

The front begins to nudge to the north as a warm front ahead of the
next low pressure system late Monday into the day Tuesday as high
pressure shifts out the northeast and onshore easterly flow dies
down. Temperatures gradually warm from the upper 70s to low 80s by
Wednesday and Thursday as warm air advection takes over. Moist,
southerly flow will continue, thus keeping the chance for showers
through the middle part of the week. Pwat values look to remain near
or just above 2 inches, so heavy rain could accompany any showers
that do form. If added instability leads to elevated convective
chances, we may need to watch the risk for flooding. Too far out to
tell for now. Best chances for rain remain to our south, and
gradually overspread the area by the middle of next week.

Aviation 20z Wednesday through Monday
The following discussion is for kphl, kpne, kttn, kabe, krdg,
kilg, kmiv, kacy and surrounding areas.

Tonight... MVFR CIGS developing across the terminals. There is a
low chance for ifr cigs, especially in the pre-dawn hours.

Patchy fog may also develop, but this looks less likely than
development of low stratus. Low confidence. NE winds less than
10 kt, becoming lgt vrb this evening.

Thursday... MVFR CIGS for most of the morning, gradually lifting
toVFR in the afternoon. Lgt vrb winds, becoming e-se less than
10 kt in the afternoon.


Thursday night... MostlyVFR expected with light south winds.

Friday... MostlyVFR with increasing south winds.

Friday night... Scattered showers and thunderstorms possible
with brief MVFR conditions otherwiseVFR. South winds less than
10 knots becoming northwest late.

Saturday through Monday... GenerallyVFR.

E-ne winds 15-20 kt will become SE 10-15 kt on Thursday. Ocean
seas will build to around 5 feet on the nj ocean waters tonight
and will subside to sub-sca levels Thursday afternoon. Will
hoist a small craft advisory from tonight through Thursday
afternoon as the onshore flow should be strong enough to elevate
the seas. Opted for a general SCA as opposed to a SCA for
hazardous seas as there may be some gusts to 25 kt tonight.


Thursday night... Generally sub-sca conditions expected.

Friday through Saturday... SCA conditions possible with passage
of cold front.

Saturday night through Sunday night... Sub-sca conditions

Monday... SCA conditions possible.

Rip currents...

there is a moderate risk for the development of dangerous and life
threatening rip currents at nj and de beaches into this evening, as
there is a medium-period easterly or southeasterly swell along with
onshore flow.

Phi watches warnings advisories
Pa... None.

Nj... None.

De... None.

Md... None.

Marine... Small craft advisory from midnight tonight to 1 pm edt
Thursday for anz450>453.

Synopsis... Staarmann
near term... Mps
short term... Mps
long term... Davis staarmann
aviation... Davis staarmann
marine... Davis mps staarmann

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CA2 - 8571892 - Cambridge, MD 1 mi43 min 82°F 79°F1014.4 hPa
44062 - Gooses Reef, MD 18 mi33 min N 14 G 16 80°F 1014.1 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 21 mi43 min NNE 14 G 18 79°F 1014.3 hPa
BISM2 - 8571421 - Bishops Head, MD 26 mi43 min NNW 12 G 17 82°F 83°F1013.7 hPa
SLIM2 - 8577330 - Solomons Island, MD 27 mi43 min N 8 G 12 81°F 80°F1013.4 hPa
TPLM2 - Thomas Point, MD 29 mi73 min NE 7 G 8 77°F 76°F1014.5 hPa (+0.0)69°F
CPVM2 33 mi43 min 79°F 69°F
44063 - Annapolis 33 mi43 min ENE 5.8 G 7.8 79°F 1014.1 hPa
APAM2 - 8575512 - Annapolis, MD 35 mi43 min 81°F 1013.1 hPa
BSLM2 - Chesapeake Bay, MD 36 mi103 min N 1.9 83°F 1013 hPa64°F
PPTM2 - 8578240 - Piney Point, MD 40 mi49 min NE 7 G 8
44042 - Potomac, MD 41 mi33 min N 9.7 G 14 80°F 1012.5 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 44 mi43 min N 2.9 G 2.9 79°F 75°F1013.8 hPa
LWTV2 - 8635750 - Lewisetta, VA 46 mi49 min NE 5.1 G 9.9 82°F 78°F1013 hPa
DRSD1 - Delaware Reserve, DE 48 mi103 min N 2.9 82°F 1013 hPa68°F

Wind History for Cambridge, MD
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1 day
2 days

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Cambridge-Dorchester Airport, MD4 mi28 minNW 1010.00 miFair82°F68°F62%1013.2 hPa
Easton / Newman Field, MD15 mi28 minNNW 9 G 1410.00 miPartly Cloudy84°F66°F55%1014.9 hPa

Wind History from CGE (wind in knots)
Last 24hrNW15
1 day agoSE9SE9SE11SE10
2 days agoE11E10E7

Tide / Current Tables for Cambridge, Choptank River, Maryland
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Tide / Current Tables for Cove Point (1.1 mi. NE of), Maryland Current
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Tide / Current data from XTide NOT FOR NAVIGATION
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Weather Map and Satellite Images
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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.
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Wind Forecast for Philadelphia/Mount Holly, PA (17,4,5,8)
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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.