Thursday, July20, 2017

Marine Weather and Tides
Cambridge, 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 5:54AMSunset 8:26PM Thursday July 20, 2017 10:31 PM EDT (02:31 UTC) Moonrise 2:08AMMoonset 4:43PM Illumination 7% Phase: Waning Crescent; Moon at 27 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- 838 Pm Edt Thu Jul 20 2017
Tonight..SW winds 10 kt. Waves 1 ft.
Fri..W winds 5 to 10 kt. Waves 1 ft.
Fri night..NW winds around 5 kt. Waves flat. A chance of showers and tstms.
Sat..E winds 5 kt. Waves flat. A chance of showers and tstms.
Sat night..SW winds 5 to 10 kt. Waves 1 ft or less. A chance of showers and tstms.
Sun..SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.
Sun night..W winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.
Mon..SW winds 5 kt...becoming nw after midnight. Waves 1 ft. A chance of tstms. A chance of showers.
Tue..NE winds 5 to 10 kt. Waves 1 ft. A chance of showers in the morning. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 838 Pm Edt Thu Jul 20 2017
Synopsis for the tidal potomac and md portion of the chesapeake bay.. Light flow is expected with high pressure to the south through the weekend. Tranquil weather expected although daily scattered Thunderstorms are expected in the afternoon and evening mainly Saturday and Sunday.

7 Day Forecast for Marine Location Near Cambridge, MD
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location: 38.57, -76.08     debug

Area Discussion for - Philadelphia/Mount Holly, PA
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Fxus61 kphi 210152
area forecast discussion
national weather service mount holly nj
952 pm edt Thu jul 20 2017

A cold front will approach the area tonight and cross through by
Friday morning. Weak high pressure will then prevail through
Saturday. Another front and associated low pressure will be across
the area Saturday night through Monday. High pressure will then move
in next Tuesday and remain into the middle of next week.

Near term until 6 am Friday morning
The sky over our region should become clear to partly cloudy. A
surface trough trailing the convective complex is expected to
pass through our forecast area late tonight.

The wind is anticipated to become light and variable overnight. Low
temperatures should be mostly in the 70s.

Short term 6 am Friday morning through 6 pm Friday
Maximum temperatures on Friday will be similar to those of today.

However, the humidity is forecast to be slightly lower. We will
leave the excessive heat warning in place for the urban corridor.

However, other areas should fall a bit short of their criteria for a
heat advisory.

The sky is expected to be mostly sunny on Friday. We will not
mention any precipitation due to the lack of any significant
triggering mechanism along with the continued existence of a capping
inversion aloft.

The wind should favor the west and southwest on Friday around 5 to
10 mph.

Long term Friday night through Thursday
The heat wave will continue on into the weekend, but it will gradually
weaken with temperatures more in line with normal after Monday. A
few recent model runs are showing than high temperatures around 90
degrees readings are possible Monday, something which has
changed since yesterday, but for now we will continue with upper
80s across the philadelphia metro area and for DELMARVA too.

Dew point temperatures will be lower over the area Saturday, but
then climb back to steamy values Sunday and early Monday. A
front will cross the area Monday and drier and cooler air will
arrive behind that for the middle of next week.

Shower and TSTM chances will be rather low Friday night and into
Saturday morning, but then increase from W to E through the afternoon
as the the front and humid air return to the area. High chance
to low likely pops will be over the area Sunday into Monday as
the system passes the region. Lower pops will be over the area
Tuesday and Wednesday with high pressure settling over the

Aviation 02z Friday through Tuesday
The following discussion is for kphl, kpne, kttn, kabe, krdg, kilg,
kmiv, kacy and surrounding areas.

Vfr conditions are expected through much of the TAF period.

Also, patchy visibility restrictions are possible during the late
night and early morning hours especially in areas where rain falls
this evening.

We are not anticipating any showers or thunderstorms on Friday.

A light southwest wind this evening is expected to become light and
variable tonight. A light northwest wind is anticipated for Friday
morning, then it should become west and southwest as the day


fri night thru Saturday morning...VFR expected.

Saturday afternoon thru Monday... MostlyVFR. Sct showers and
tstms with lower conditions possible. Tue... MostlyVFR.

High pressure over the atlantic will continue to influence the
coastal waters of delaware and new jersey for tonight. A weak
frontal boundary from the northwest is forecast to arrive early on
Friday. The wind should favor the south and southwest at less than
15 knots tonight, becoming west to southwest on Friday. Wave heights
on our ocean waters will remain around 2 to 4 feet and waves on
delaware bay should be 1 to 2 feet.


sub-sca conditions overall. The main hazard will be sct tstms
mainly between Saturday afternoon and Monday. Locally higher
winds and seas with tstms. Bring your NOAA weather radio along
to get alerts.

Rip currents...

the underlying 10 second southeasterly swell is forecast to
persist into Friday. However, this is expected to be weaker than
yesterday so conditions may be more in the low category.

The kdov dew point readings are unrepresentative of the area
and should not be used when diagnosing humidity heat indices and
meteorological analysis of meteorological items which use
dewpoint in a calculation.

Phi watches warnings advisories
Pa... Excessive heat warning until 8 pm edt Friday for paz070-071-

Nj... Excessive heat warning until 8 pm edt Friday for njz015-

De... Excessive heat warning until 8 pm edt Friday for dez001.

Md... None.

Marine... None.

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

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CA2 - 8571892 - Cambridge, MD 1 mi49 min 83°F 87°F1014.4 hPa
44062 - Gooses Reef, MD 18 mi41 min S 7.8 G 9.7 85°F 1014.1 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 20 mi49 min S 7 G 8 83°F 1014.1 hPa
BISM2 - 8571421 - Bishops Head, MD 24 mi49 min S 12 G 16 86°F 88°F1013.6 hPa
SLIM2 - 8577330 - Solomons Island, MD 26 mi49 min SSW 8 G 8.9 84°F 85°F
TPLM2 - Thomas Point, MD 30 mi31 min SSW 9.9 G 11 85°F 82°F
44063 - Annapolis 33 mi41 min SW 5.8 G 7.8 87°F 1013.2 hPa
CPVM2 34 mi49 min 85°F 83°F
BSLM2 - Chesapeake Bay, MD 36 mi121 min S 2.9 83°F 1012 hPa74°F
APAM2 - 8575512 - Annapolis, MD 36 mi49 min 87°F 1012.6 hPa
44042 - Potomac, MD 39 mi41 min SSW 9.7 G 12 84°F 1012.6 hPa
PPTM2 - 8578240 - Piney Point, MD 39 mi55 min SSW 8 G 9.9
44043 - Patapsco, MD 43 mi41 min SSW 5.8 G 5.8 86°F 1013.6 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 45 mi49 min S 4.1 G 6 85°F 88°F1013.3 hPa
LWTV2 - 8635750 - Lewisetta, VA 45 mi49 min SSW 8 G 9.9 83°F 87°F1013.4 hPa
DRSD1 - Delaware Reserve, DE 49 mi61 min SSW 2.9 83°F 1013 hPa75°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, MD3 mi41 minN 010.00 miFair81°F75°F84%1013.5 hPa
Easton / Newman Field, MD16 mi1.7 hrsSSW 610.00 miClear86°F73°F66%1014.2 hPa

Wind History from ESN (wind in knots)
Last 24hrSW4SW7SW6SW5SW3SW4W3SW5CalmCalmN3SW3W4W3NW5NW7NW7--SW6W10W8SW8S8SW6
1 day agoS6SW4S3CalmCalmCalmCalmCalmCalmCalmS4W5SW4W4SW3W5W5W6W6W6W6CalmSW4SW4
2 days agoE4CalmSE4S3CalmCalmCalmSE3CalmCalmCalmCalmCalmSE4SE3SE6S3CalmS5W3W4S10S10S8

Tide / Current Tables for Cambridge, Choptank River, Maryland
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Thu -- 01:48 AM EDT     2.31 feet High Tide
Thu -- 03:08 AM EDT     Moonrise
Thu -- 05:56 AM EDT     Sunrise
Thu -- 08:41 AM EDT     0.58 feet Low Tide
Thu -- 01:53 PM EDT     1.84 feet High Tide
Thu -- 05:43 PM EDT     Moonset
Thu -- 08:19 PM EDT     0.02 feet Low Tide
Thu -- 08:24 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
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Cove Point (1.1 mi. NE of)
Click for Map
Thu -- 12:07 AM EDT     0.84 knots Max Flood
Thu -- 03:10 AM EDT     Moonrise
Thu -- 04:00 AM EDT     -0.00 knots Slack
Thu -- 05:57 AM EDT     Sunrise
Thu -- 07:23 AM EDT     -0.68 knots Max Ebb
Thu -- 10:47 AM EDT     0.00 knots Slack
Thu -- 12:50 PM EDT     0.28 knots Max Flood
Thu -- 03:17 PM EDT     -0.00 knots Slack
Thu -- 05:43 PM EDT     Moonset
Thu -- 06:51 PM EDT     -0.47 knots Max Ebb
Thu -- 08:25 PM EDT     Sunset
Thu -- 09:28 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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Weather Map
IR Satellite Image from GEOS

GOES Local Image of Mid-Atlantic    EDIT

Wind Forecast for Philadelphia/Mount Holly, PA (22,6,7,8)
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Ground Weather Radar Station Dover AFB, DE
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weather_mapweather_map weather_map

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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.