Thursday, June21, 2018

Marine Weather and Tides
Algonquin, 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 5:38AMSunset 8:34PM Thursday June 21, 2018 1:03 AM EDT (05:03 UTC) Moonrise 1:21PMMoonset 12:50AM Illumination 53% Phase: First Quarter Moon; Moon at 8 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
    EDIT      (on/off)   Help
ANZ541 Choptank River To Cambridge Md And The Little Choptank River- 1031 Pm Edt Wed Jun 20 2018
Rest of tonight..SW winds 5 to 10 kt. Waves 1 ft. Showers likely. Scattered tstms late this evening, then a slight chance of tstms.
Thu..N winds 5 to 10 kt. Waves 1 ft.
Thu night..E winds 5 to 10 kt. Waves 1 ft.
Fri..E winds 10 kt with gusts to 20 kt. Waves 1 ft. Showers likely.
Fri night..E winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. Showers likely.
Sat..S winds 5 to 10 kt. Waves 1 ft. Showers and tstms likely.
Sat night..SW winds 5 to 10 kt. Waves 1 ft. A chance of showers.
Sun..W winds 5 to 10 kt. Waves 1 ft. A chance of showers in the morning. A chance of tstms, then a chance of showers through the night.
Mon..N winds 5 to 10 kt. Waves 1 to 2 ft. A chance of showers. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 1031 Pm Edt Wed Jun 20 2018
Synopsis for the tidal potomac and md portion of the chesapeake bay.. Low pressure will track from west virginia east over the waters along a stalled front overnight. The front will then drop farther south Thursday as high pressure briefly builds from the ohio valley to new england. The front will then return north as a warm front Friday night into Saturday as the high moves offshore and low pressure moves from the midwest to the great lakes. A small craft advisory may be needed for a portion of the waters Friday into Saturday.

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

Area Discussion for - Philadelphia/Mount Holly, PA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus61 kphi 210114
area forecast discussion
national weather service mount holly nj
914 pm edt Wed jun 20 2018

A developing low pressure system and its associated fronts will
traverse the region tonight. Canadian high pressure moves into
the northeast late Thursday into Friday while a stalled front
remains just to the south. Low pressure moving from the eastern
great lakes into northern new england will lift a warm through
the region on Saturday, followed by a cold frontal passage late
Sunday. A sprawling area of canadian high pressure builds into
the area through the first half of next week.

Near term until 6 am Thursday morning
Showers were scattered across eastern pennsylvania,
northeastern maryland, delaware and new jersey around 9:00 pm.

The precipitation is forecast to become more organized

Diffuse low pressure was located in the upper ohio river valley
early this evening. The feature is expected to become better
developed overnight with its center reaching southeastern
pennsylvania around 2:00 am. The low is anticipated to pass off
the new jersey coast before daybreak.

The low should be traveling along a weak surface boundary that
extended eastward across southeastern pennsylvania and up into
the new york city area this evening. As the low approaches, the
boundary is expected to provide a focus for the development of
additional showers and thunderstorms. Precipitable water values
in the 2.00 to 2.25 range indicate that there will be abundant
moisture available. As a result, we continue to expected some
bands of heavy rain. While the model guidance has been varying
with the placement of the axis of heavy rain, it seems as though
the general average or consensus puts it across southeastern
pennsylvania and central new jersey. Although, locally heavy
showers and thunderstorms also seem likely on the upper delmarva
and in southern new jersey.

The expected rainfall amounts suggest some localized flooding
of roadways and areas of poor drainage overnight. It seems as
though we will be able to handle the situation mainly with flood
advisory products.

The wind should be light and variable for much of the night,
with the direction favoring the south on the upper DELMARVA and
in southern new jersey. The wind is forecast to shift to the
north and northeast at most locations toward daybreak as the low
begins to pass off the coast.

Minimum temperatures are forecast to range from the upper 50s
in the poconos to the lower 70s in our southern counties.

Short term 6 am Thursday morning through 6 pm Thursday
Most of the showers associated with the system from Wednesday
night will have moved S E of the area by Thursday morning. A few
showers may remain across ERN de and SE nj however. These
showers will continue east and be offshore by noon. Clouds will
decrease from NW SE as drier air filters into the area.

Temperatures will reach the low mid 80s in most areas Thursday.

Dew points will be somewhat less than Wednesday. Winds will be
north to northeast around 10 mph.

Long term Thursday night through Wednesday
Thursday night through Sunday...

there will be a brief reprieve between systems Thursday night
into Friday before the next system affects the area over the
weekend. To start the period Thursday night, a quasi-stationary
front will be situated just south of the area while a high
pressure system moves from ontario and quebec into new england.

This will set up a cooler E NE flow over the area. Mainly clear
to partly cloudy skies Thursday evening will give way to
increasing clouds overnight as mid and upper level moisture
begins streaming in ahead of the next system. In addition, there
are some indications that a marine low stratus deck may form
and effect portions of central and southern nj into the
delmarva. The area should remain precip free for Thursday night
however with lows mainly in the 60s, except 50s over the
southern poconos.

Tricky forecast for Friday. Moisture associated with the next
approaching low over the ohio valley will continue to push
eastward toward the region in the SW flow aloft. Meanwhile, at
the surface, the stationary front remains stalled just to our
south with cool E NE winds over the area to its north. This will
be associated with the westward extent of the ridge over new
england. Despite the moisture advecting in aloft, there will be
a dry layer in the lower levels associated with the ridge and
this will tend to limit precip over the area. That said, still
think there may be some scattered to isolated showers over the
area under the mainly cloudy skies so we do have chance to
slight chance pops in for most areas by Friday afternoon. We
also trended the forecast cooler as there will be an inversion
above the cooler NE flow. Generally expect highs in the low to
mid 70s but it could even be a bit cooler than this.

Friday night, low pressure supported by an upper trough
advances northward toward lower michigan slowly pushing a warm
front toward the southern DELMARVA by early Saturday. Expect an
area of showers to move through associated with the isentropic
lift and shortwave energy in the SW flow ahead of the upper
trough. A few rumbles of thunder will be possible but this
should be mainly confined to southern areas across the delmarva
closer to the front. Heading into Saturday, the warm front will
continue to slowly make its way northward through the area but
may not make it farther north than the i-78 i-80 corridor by
late day. The initial round of showers Friday night may last
into Saturday morning before there should be a lull as much of
the area breaks into the warm sector... So not looking like a
continuous all day rain. Depending on how much sunshine breaks
out temps south of the front should at least reach the low to
mid 80s, if not a bit higher, with dew points climbing into the
upper 60s to low 70s so it will be quite muggy once again! By
the latter part of the afternoon into the evening attention will
then turn to the thunderstorm threat ahead of a pre-frontal
trough. At this point still looking at good deep layer forcing
with ml capes potentially reaching 1000-1500+ j kg and deep
layer shear reaching 30-50 knots. For these reasons still see
the potential for severe weather given this set up... Especially
near and south of the i-95 corridor in the warm sector.

Indications are for a round of late day showers and
thunderstorms to affect this area before moving out Saturday
night as the trough moves through.

By Sunday morning, area should be in another lull however the
actual cold front and associated upper level trough will still
be upstream. For this reason expect that a mainly dry start to
the day with a mix of Sun clouds will give way to increasing
chances for showers and storms arriving from the west by late
afternoon as the front and the main shortwave energy aloft
approaches. Still another very warm, muggy day with temps and
humidity levels similar to Saturday.

Sunday night through Wednesday...

showers and storms with the cold front discussed above will
sweep through the area with the front Sunday night into early
Monday followed by clearing skies by late Monday along with
falling dew points and temperatures near seasonal. Beyond this
time, a sprawling area of high pressure looks to build in from
the north bringing mainly clear skies with seasonable
temperatures and comfortable humidity levels through mid week.

Aviation 01z Thursday through Monday
The following discussion is for kphl, kpne, kttn, kabe, krdg,
kilg, kmiv, kacy and surrounding areas.

Overnight...VFR lowering to MVFR and ifr in showers and
scattered thunderstorms. The rain will become locally moderate
to heavy. Variable wind 6 knots or less becoming north to
northeast toward daybreak.

Thursday... Generally MVFR andVFR ceilings in the morning with
some clearing in the afternoon. Northeast wind 5 to 10 knots
becoming east to southeast in the afternoon.


Thursday night... MVFR ceilings possible at acy and miv, with
northeast wind gusts up to 20 mph. Elsewhere,VFR. Medium

Friday... PredominantlyVFR. Cannot rule out brief MVFR ceilings
in shra. Easterly wind gusts up to 20 mph, especially acy and
phl. Medium confidence.

Friday night... Low clouds and fog will lead MVFR, with ifr
possible, especially late. Easterly wind gusts up to 20 mph. Low

Saturday... Conditions gradually improving to MVFR, withVFR
possible by afternoon, especially i-95 corridor terminals. But
shra and tsra will lead to brief ceiling visibility
restrictions. Southwest winds. Medium confidence.

Saturday night... A return to low clouds and fog with MVFR, and
even ifr possible. Winds shifting to the northwest. Low

Sunday... Low clouds and fog will dissipate with a return to
mainlyVFR until a late day risk of storms could bring brief
restrictions. Winds west- southwest. Medium confidence.

Sunday night... Showers, storms possible along with associated

Monday... Becoming mainlyVFR.

Overall, conditions will remain below SCA criteria overnight.

Winds overnight will be mostly SE to S around 5 to 10 knots.

Showers and scattered tstms. Locally higher winds and seas near

Thursday, showers will end during the morning and then fair
weather will arrive for the afternoon. Winds will be north to
northeast at around 10 knots.

Rip currents... Low risk expected on Thursday.


winds and seas may reach SCA levels late Thursday night as low
pressure develops offshore. The pressure gradient between high
pressure to the north and an approaching warm front to the south
likely leads to continued SCA winds seas Friday and Friday
night. As the warm front moves across the waters, a brisk
southwest flow promotes SCA level seas through at least
Saturday. A return to more tranquil, sub-sca boating conditions
is expected Sunday into early next week.

Phi watches warnings advisories
Pa... None.

Nj... None.

De... None.

Md... None.

Marine... None.

Synopsis... Fitzsimmons
near term... Iovino
short term... O'hara
long term... Fitzsimmons
aviation... Fitzsimmons iovino
marine... Fitzsimmons o'hara

Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CA2 - 8571892 - Cambridge, MD 1 mi63 min 75°F 81°F1009.7 hPa (+0.5)
44062 - Gooses Reef, MD 18 mi43 min NNW 1.9 G 1.9 75°F 1008.7 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 21 mi63 min Calm G 1.9 75°F 1008.9 hPa (+0.0)
BISM2 - 8571421 - Bishops Head, MD 26 mi63 min SSW 8.9 G 11 79°F 84°F1009 hPa (+0.6)
SLIM2 - 8577330 - Solomons Island, MD 27 mi63 min W 1.9 G 2.9 76°F 79°F1008.1 hPa (+0.0)
TPLM2 - Thomas Point, MD 29 mi63 min W 6 G 7 73°F 76°F1009.2 hPa (+0.0)70°F
CPVM2 33 mi63 min 74°F 74°F
44063 - Annapolis 33 mi43 min W 5.8 G 7.8 73°F 1008.4 hPa
APAM2 - 8575512 - Annapolis, MD 35 mi63 min 73°F 1007.8 hPa (+0.0)
BSLM2 - Chesapeake Bay, MD 36 mi153 min WNW 1.9 68°F 1009 hPa66°F
PPTM2 - 8578240 - Piney Point, MD 40 mi69 min WSW 7 G 8
TCBM2 - 8573364 - Tolchester Beach, MD 44 mi63 min SSW 2.9 G 5.1 74°F 78°F1008.1 hPa (+0.0)
LWTV2 - 8635750 - Lewisetta, VA 46 mi63 min W 5.1 G 6 75°F 83°F1008.6 hPa (+0.7)
DRSD1 - Delaware Reserve, DE 48 mi153 min SSE 1.9 75°F 1008 hPa75°F

Wind History for Cambridge, MD
(wind in knots)    EDIT      (on/off)   Help
1 day
2 days

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Cambridge-Dorchester Airport, MD4 mi68 minN 08.00 miMostly Cloudy75°F73°F94%1008.8 hPa
Easton / Newman Field, MD15 mi54 minN 010.00 miLight Rain75°F72°F92%1009.8 hPa

Wind History from CGE (wind in knots)
Last 24hrCalmCalmCalmCalmCalmCalmNE6NE4CalmCalmCalmCalm3CalmCalmCalmSW4CalmCalmCalmCalmS5CalmCalm
1 day agoCalmCalmCalmSW4CalmCalmW4CalmW4NW4NW9NW6
2 days agoCalmCalmCalmSE3CalmCalmN3S3SE43Calm3Calm6

Tide / Current Tables for Cambridge, Choptank River, Maryland
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Click for Map
Thu -- 01:50 AM EDT     Moonset
Thu -- 05:40 AM EDT     Sunrise
Thu -- 05:58 AM EDT     0.49 feet Low Tide
Thu -- 11:35 AM EDT     1.90 feet High Tide
Thu -- 02:20 PM EDT     Moonrise
Thu -- 06:20 PM EDT     0.13 feet Low Tide
Thu -- 08:32 PM EDT     Sunset
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
   EDIT      (on/off)   Help   One Week of Data
Cove Point (1.1 mi. NE of)
Click for Map
Thu -- 01:23 AM EDT     -0.00 knots Slack
Thu -- 01:51 AM EDT     Moonset
Thu -- 04:24 AM EDT     -0.49 knots Max Ebb
Thu -- 05:41 AM EDT     Sunrise
Thu -- 07:13 AM EDT     0.00 knots Slack
Thu -- 09:49 AM EDT     0.41 knots Max Flood
Thu -- 12:46 PM EDT     -0.00 knots Slack
Thu -- 02:21 PM EDT     Moonrise
Thu -- 04:26 PM EDT     -0.60 knots Max Ebb
Thu -- 07:21 PM EDT     0.00 knots Slack
Thu -- 08:32 PM EDT     Sunset
Thu -- 10:35 PM EDT     0.70 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Weather Map and Satellite Images
       (on/off)   HelpWeather Map
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 Philadelphia/Mount Holly, PA (1,6,7,8)
      (on/off)   Help

Ground Weather Radar Station Dover AFB, DE
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.