Tuesday, July14, 2020
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Marine Weather and Tides
Cape St. Claire, MD

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 5:50AMSunset 8:33PM Tuesday July 14, 2020 2:18 AM EDT (06:18 UTC) Moonrise 12:24AMMoonset 1:58PM Illumination 36% Phase: Third Quarter Moon; Moon at 23 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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ANZ531 Chesapeake Bay From Pooles Island To Sandy Point- 144 Am Edt Tue Jul 14 2020
Overnight..NW winds 5 to 10 kt. Waves 1 ft or less.
Tue..N winds 5 to 10 kt. Waves 1 ft.
Tue night..N winds around 5 kt. Waves flat.
Wed..E winds 5 kt. Waves flat.
Wed night..SE winds 5 to 10 kt. Waves 1 ft.
Thu..SE winds 5 to 10 kt with gusts to 20 kt. Waves 1 to 2 ft.
Thu night..S winds 10 kt with gusts to 20 kt. Waves 1 to 2 ft. A chance of showers.
Fri..SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.
Sat..S winds 5 kt. Waves less than 1 ft. A chance of tstms in the morning. A chance of showers. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 144 Am Edt Tue Jul 14 2020
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A weak front along the atlantic seaboard will push offshore overnight. High pressure will then build across the area Tuesday and Wednesday before moving offshore. A front may approach from the north late in the week.


7 Day Forecast for Marine Location Near Cape St. Claire CDP, MD
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location: 39.09, -76.35     debug


Area Discussion for - Philadelphia/Mount Holly, PA
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FXUS61 KPHI 140526 AFDPHI

Area Forecast Discussion National Weather Service Mount Holly NJ 126 AM EDT Tue Jul 14 2020

SYNOPSIS. High pressure will build into the eastern U.S. through midweek. A backdoor cold front will move south into the area late tonight and Wednesday before lifting northward as a warm front on Thursday and Friday. A weak cold front will approach the East Coast near the end of the week into the weekend, but high pressure in the Southeast will likely aid in its stalling and eventual dissipation.

NEAR TERM /THROUGH TONIGHT/. A potent midlevel trough is moving into New England at this time and will continue its eastward movement today. The trough axis is expected to be offshore by early afternoon, with large- scale descent likely encompassing the region thereafter. Models (convection-allowing and coarser deterministic) are skittish in producing convection near the vorticity maximum in our CWA today, and given the unfavorable position/timing of the trough, I went with a dry forecast today. Having said that, a stray shower/storm is possible, especially near/north of I-80, but chances are simply too low at a given location to justify PoPs at this time.

At the surface, high pressure will move slowly through the Midwest today, with a cold front attendant to the trough slowly migrating farther and farther offshore. In between, weak cold/dry advection should occur, with the result being mostly sunny skies and fairly comfortable humidity levels. Given the degree of insolation and slight downsloping component expected, highs will likely be near to slightly above seasonal averages.

The surface high will progress into the Appalachians by 12z Wednesday, with a quiet night expected in our area as winds decouple and dew points remain seasonably comfortable. Lows are expected to be near or slightly above seasonal averages.

SHORT TERM /TUESDAY THROUGH WEDNESDAY NIGHT/. A mid-level trough and its associated axis will be exiting the coast late Tuesday afternoon and evening, taking any residual precipitation in the northern portion of the CWA with it. Then mid-level and surface ridging will provide benign weather for Tuesday and Wednesday. With an onshore flow and modest dew point temperatures for this time of year, both air temperature and relative humidity should remain fairly comfortable.

LONG TERM /THURSDAY THROUGH MONDAY/. Another frontal boundary associated with a low pressure system moving through the Great Lakes region is expected to bring the chance of showers and thunderstorms to the area late Thursday afternoon through Friday. This front may sag far enough south of the region to provide benign weather during the upcoming weekend, but the combination of a mid-level ridge and southerly flow at the surface will produce increasing warmth and humidity into early next week. An impulse developing along this front may touch off a few showers and thunderstorms, mainly south of the Mason-Dixon line, Sunday night, and scattered showers and thunderstorms are possible again on Monday given an increasingly unstable airmass.

AVIATION /05Z TUESDAY THROUGH SATURDAY/. The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY and surrounding areas.

Rest of tonight . VFR with light northwest winds. High confidence.

Tuesday . VFR with northwest winds around 10 kt. High confidence.

Tuesday night . VFR with light winds. Directions may be predominantly northerly or possibly even northeasterly late, but will likely be rather variable at most terminals. Moderate confidence.

Outlook . Wednesday through Wednesday night . Mainly VFR. E or SE winds 5 to 15 kt. Moderate confidence.

Thursday and Thursday night . Mainly VFR, though chances for showers and storms increase late Thursday afternoon. Brief restrictions possible in their proximity. Southeast winds 5 to 15 kt becoming southerly Thursday night. Moderate confidence.

Friday . Mainly VFR, though chances for showers/storms continue, with brief restrictions possible. South to southwest winds 5 to 15 kt. Low confidence.

Friday Night and Saturday . Mainly VFR. South to southwest winds 5 to 10 kt. Low confidence.

MARINE. Sub-advisory winds/seas are expected through tonight. Winds will likely become southerly for a time today before fairly quickly becoming northwesterly this evening. Thereafter, directions will gradually become north or even northeast by daybreak Wednesday. Speeds will generally be 5 to 15 kt. Seas around 3 feet should be expected.

Outlook . Wednesday through Wednesday night . Sub-advisory winds/seas and fair weather expected.

Thursday through Friday . Sub-advisory winds/seas expected. A chance of showers/storms, with locally higher waves and gusty winds in their proximity.

Friday night and Saturday . Sub-advisory winds/seas expected.

Rip Currents .

Breaking waves are forecast to be 2 feet or less with a medium period southeast swell along the coasts of Delaware and New Jersey on Tuesday. A light and variable wind in the morning is forecast to settle into the south around 5 to 10 MPH in the afternoon. The risk for the development of dangerous rip currents is expected to be low on Tuesday.

The wave and swell conditions are anticipated to remain nearly the same for Wednesday. However, the wind is forecast to become easterly around 10 MPH. The low risk of rip currents is expected to continue.

EQUIPMENT. The NOAA Weather Radio All Hazards broadcast from Hibernia Park, PA (WNG704) remains off the air until further notice due to damage to the antenna during the June 3 derecho.

PHI WATCHES/WARNINGS/ADVISORIES. PA . None. NJ . None. DE . None. MD . None. MARINE . None.

Synopsis . CMS Near Term . CMS Short Term . Miketta Long Term . Miketta Aviation . CMS/Miketta Marine . CMS/Miketta Equipment . WFO PHI


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TCBM2 - 8573364 - Tolchester Beach, MD 10 mi49 min 83°F
APAM2 - 8575512 - Annapolis, MD 10 mi49 min 83°F
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 13 mi151 min 1012.7 hPa
FSNM2 13 mi169 min 1012.7 hPa
TPLM2 - Thomas Point, MD 14 mi19 min SSW 8 G 9.9 76°F 81°F1014 hPa (+0.7)70°F
BLTM2 - 8574680 - Baltimore, MD 17 mi49 min 80°F
BSLM2 - Chesapeake Bay, MD 29 mi109 min S 4.1 1013 hPa
44062 - Gooses Reef, MD 37 mi25 min S 1.9 G 3.9 75°F 82°F
CA2 - 8571892 - Cambridge, MD 39 mi49 min 84°F
WASD2 - 8594900 - Washington, DC 39 mi49 min 85°F
CHCM2 - 8573927 - Chesapeake City, MD 42 mi49 min 84°F

Wind History for Tolchester Beach, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Bay Bridge Field, MD8 mi24 minSW 310.00 miPartly Cloudy77°F69°F79%1013.2 hPa
Annapolis, United States Naval Academy, MD10 mi25 minN 010.00 miA Few Clouds75°F66°F74%1013.1 hPa
Baltimore / Martin, MD18 mi24 minN 010.00 miPartly Cloudy73°F69°F89%1013.5 hPa
Baltimore, Baltimore-Washington International Airport, MD18 mi25 minW 310.00 miPartly Cloudy74°F64°F74%1012.9 hPa
Fort Meade / Tipton, MD22 mi24 minN 010.00 miFair68°F66°F94%1014.2 hPa

Link to 5 minute data for KBWI

Wind History from BWI (wind in knots)
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Last 24hrCalmCalmW3CalmNW3W4Calm3NE54CalmCalmNW4NW9NW7NW9
G18
N6N4CalmS5W3CalmSW4W3
1 day agoW6W4W5SW4S5SW33SW6SW5S74S5SE10S8S6S3CalmNW13
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2 days agoSW3W4W3CalmCalmS3SW5SW4W5SW6--NW12W8W15W16
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Tide / Current Tables for Baltimore (Chesapeake Bay), Maryland
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Baltimore (Chesapeake Bay)
Click for Map
Tue -- 01:24 AM EDT     Moonrise
Tue -- 02:48 AM EDT     5.58 feet High Tide
Tue -- 05:51 AM EDT     Sunrise
Tue -- 09:19 AM EDT     4.84 feet Low Tide
Tue -- 02:13 PM EDT     5.25 feet High Tide
Tue -- 02:57 PM EDT     Moonset
Tue -- 08:22 PM EDT     4.39 feet Low Tide
Tue -- 08:31 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.25.45.55.65.55.45.254.94.84.955.15.25.25.25.14.94.64.54.44.44.54.8

Tide / Current Tables for Baltimore Harbor Approach, Maryland Current
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Baltimore Harbor Approach
Click for Map
Tue -- 01:04 AM EDT     0.88 knots Max Flood
Tue -- 01:24 AM EDT     Moonrise
Tue -- 04:42 AM EDT     -0.00 knots Slack
Tue -- 05:51 AM EDT     Sunrise
Tue -- 07:41 AM EDT     -0.61 knots Max Ebb
Tue -- 11:05 AM EDT     0.00 knots Slack
Tue -- 01:26 PM EDT     0.33 knots Max Flood
Tue -- 02:57 PM EDT     Moonset
Tue -- 03:46 PM EDT     -0.00 knots Slack
Tue -- 07:10 PM EDT     -0.62 knots Max Ebb
Tue -- 08:30 PM EDT     Sunset
Tue -- 10:09 PM EDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.80.90.80.60.3-0.1-0.4-0.6-0.6-0.5-0.3-00.20.30.30.2-0.1-0.3-0.5-0.6-0.6-0.4-0.10.3

Weather Map
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wmap_A
GEOS 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.
Link to Loop



Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Philadelphia/Mount Holly, PA (2,6,7,8)
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Ground Weather Radar Station Dover AFB, DE
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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 numerous 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.