Monday, September27, 2021
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Marine Weather and Tides
Cape St. Claire, MD

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:57AMSunset 6:56PM Monday September 27, 2021 3:32 AM EDT (07:32 UTC) Moonrise 9:44PMMoonset 12:21PM Illumination 67% Phase: Waning Gibbous; Moon at 21 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- 136 Am Edt Mon Sep 27 2021
.small craft advisory in effect from this afternoon through this evening...
Overnight..W winds 10 kt. Waves 1 ft.
Mon..SW winds 10 to 15 kt...becoming S late. Gusts up to 20 kt. Waves 1 to 2 ft.
Mon night..SW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Tue..W winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.
Tue night..NW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.
Wed..N winds 10 kt. Waves 1 ft.
Wed night..N winds 5 to 10 kt. Waves 1 ft.
Thu..N winds 5 to 10 kt. Waves 1 ft.
Fri..N winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 136 Am Edt Mon Sep 27 2021
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will build overhead through tonight. The high will move offshore Monday before another cold front is poised to cross the waters late Tuesday. Canadian high pressure will build southward toward the waters through the end of the work week. Small craft advisories may be needed for portions of the waters Tuesday.


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


Area Discussion for - Philadelphia/Mount Holly, PA
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FXUS61 KPHI 270459 AFDPHI

Area Forecast Discussion National Weather Service Mount Holly NJ 1259 AM EDT Mon Sep 27 2021

SYNOPSIS. High pressure will build northward from the Southeast states tonight and Monday. A cold front will move through the region Tuesday. A broad surface high will move southeastward towards New England for the remainder of the week. An area of low pressure may move into the region into next weekend.

NEAR TERM /THROUGH TODAY/. No significant changes with the early morning update. A few high clouds are filtering into the Poconos and northwest New Jersey this morning. Surface high pressure is expected to remain in the southeastern states tonight before sliding off the coast on Monday. The air mass will continue to bring dry weather conditions to our region.

Through much of tonight, we should have mostly clear conditions. However, a deck of mid level clouds associated with warm advection aloft is expected to pass over eastern Pennsylvania, and northern and central New Jersey from very late tonight into early Monday morning. Scattered clouds are then anticipated for the balance of Monday.

The gusty northwest wind will likely diminish this evening. A westerly wind less than 10 MPH is anticipated for tonight. A southwest wind is expected to increase to 10 to 15 MPH on Monday.

Lows tonight should favor the 50s. Warming in the southwest flow on the back side of the surface high is expected to cause temperatures to approach 80 degrees in much of our region on Monday afternoon.

SHORT TERM /TONIGHT THROUGH TUESDAY NIGHT/. A progressive short wave trough will move over the Great Lakes Monday night with an attendant surface low and cold front moving towards our region out of southern Canada. While moisture is still limited, there is still weak instability forecast along and ahead of the front, so will keep scattered showers and thunderstorms in the forecast on Tuesday. Steep lapse rates and the slightly drier mid- level profile could lead to some small hail with the stronger of these thunderstorms.

LONG TERM /WEDNESDAY THROUGH SUNDAY/. The forecast in the longer term remains on track with a blocking pattern developing from the Plains to the Northeast and Mid- Atlantic.

At the surface, a surface low will undergo cyclogenesis over the Canadian Maritime Provinces Wednesday beneath a further amplifying and negatively tilted trough over the Northeast. Several pieces of shortwave energy will ride around the Plains ridge and into the Northeast upper-level low into the end of the workweek. At the surface, high pressure will slowly move across the Great Lakes Thursday and Friday, with a cool northerly flow filtering into the region.

It should be rain-free Wednesday through Friday amidst the blocked pattern. There is low confidence in the forecast for Saturday and Sunday as model guidance waivers on whether the blocking pattern breaks down or remains intact. Kept the forecast dry on Saturday with a slight chance showers holding off until Sunday.

AVIATION /06Z MONDAY THROUGH FRIDAY/. The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY and surrounding areas.

Tonight . VFR conditions expected. Mostly clear, with an increase in clouds. especially at ABE and TTN and north. Northwest wind 10 to 15 knots, becoming west 8 knots or less this evening. High confidence.

Monday . VFR. Decreasing cloud cover in the morning, with only scattered clouds in the afternoon. Southwest wind increasing to 10 to 15 knots with gusts around 20 knots. High confidence.

Outlook .

Tuesday . Mainly VFR. Scattered mid-level clouds as a cold front traverses the region may lead to some restrictions. Southwest winds turning west-northwest from 10 to 15 knots. Moderate confidence.

Wednesday through Friday . VFR with northerly winds from 10 to 15 knots. High confidence.

MARINE. Conditions are expected to be below Small Craft Advisory criteria through the day on Monday as high pressure passes off the Southeast coast.

Outlook .

Monday night . Southwesterly winds from 15 to 20 knots with gusts to 25 knots will likely require an SCA. Seas from 2 to 4 feet.

Tuesday . Sub-advisory conditions expected with southwesterly winds turning northwesterly from 10 to 15 knots and gusting to 20 knots. Seas from 2 to 3 feet.

Wednesday through Friday . Sub-advisory conditions expected with northerly winds from 10 to 15 knots with gusts to 20 knots. Seas from 2 to 4 feet.

Rip currents .

A MODERATE risk of rip currents is anticipated for the NJ coast on Monday, with a LOW risk expected for the Delaware Beaches. By Tuesday, with the medium period swell diminishing, and off shore flow continuing, a LOW risk is currently forecast for the coast of both NJ and DE.

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

Synopsis . Davis Near Term . Davis/Iovino/Johnson Short Term . Franklin Long Term . Franklin Aviation . Franklin/Iovino/Johnson Marine . Franklin/Iovino/Johnson


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CPVM2 7 mi44 min 65°F 54°F
APAM2 - 8575512 - Annapolis, MD 10 mi44 min W 2.9 G 5.1 60°F 76°F1017.2 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 10 mi44 min W 7 G 9.9 69°F 72°F1017.5 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 13 mi44 min WSW 6 G 7 62°F 1017.3 hPa
FSNM2 13 mi44 min WSW 7 G 8 63°F 1017.1 hPa
TPLM2 - Thomas Point, MD 14 mi32 min SW 8 G 8 66°F 73°F1018.4 hPa (+0.3)
BLTM2 - 8574680 - Baltimore, MD 17 mi44 min Calm G 1.9 63°F 76°F1016.8 hPa
BSLM2 - Chesapeake Bay, MD 29 mi62 min Calm 52°F 1017 hPa52°F
CA2 - 8571892 - Cambridge, MD 39 mi44 min SW 6 G 7 64°F 73°F1017.7 hPa
WASD2 - 8594900 - Washington, DC 39 mi44 min SSW 2.9 G 4.1 62°F 71°F1017.4 hPa
CHCM2 - 8573927 - Chesapeake City, MD 42 mi44 min SW 1 G 1.9 57°F 73°F1017.2 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 48 mi44 min SSW 9.9 G 12 66°F 1017.9 hPa

Wind History for Tolchester Beach, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Annapolis, United States Naval Academy, MD10 mi38 minWNW 310.00 miFair60°F53°F78%1017.6 hPa
Baltimore / Martin, MD18 mi37 minN 010.00 miFair59°F52°F77%1017.9 hPa
Baltimore, Baltimore-Washington International Airport, MD18 mi38 minN 010.00 miFair57°F49°F74%1017.2 hPa
Fort Meade / Tipton, MD22 mi37 minN 010.00 miFair50°F50°F100%1018.6 hPa

Link to 5 minute data for KW29

Wind History from W29 (wind in knots)
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Last 24hr--S7SE6S5S8S9S10S11S10
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S7S6SE5SE4SE6SE6SE9SE10S6Calm
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2 days agoS3S6S5S7SE6CalmSE3NW3CalmCalmE3CalmSE4SE5S7S9S8S9S7W6S6S10
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Tide / Current Tables for Sandy Point, Maryland
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Sandy Point
Click for Map
Mon -- 05:30 AM EDT     0.59 feet Low Tide
Mon -- 06:58 AM EDT     Sunrise
Mon -- 10:01 AM EDT     0.85 feet High Tide
Mon -- 01:21 PM EDT     Moonset
Mon -- 03:45 PM EDT     0.30 feet Low Tide
Mon -- 06:54 PM EDT     Sunset
Mon -- 10:44 PM EDT     Moonrise
Mon -- 10:59 PM EDT     1.26 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.110.90.70.70.60.60.60.70.80.80.80.70.60.40.30.30.40.50.70.91.11.21.3

Tide / Current Tables for Baltimore Harbor Approach, Maryland Current
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Baltimore Harbor Approach
Click for Map
Mon -- 01:29 AM EDT     -0.00 knots Slack
Mon -- 04:45 AM EDT     -0.76 knots Max Ebb
Mon -- 06:57 AM EDT     Sunrise
Mon -- 08:29 AM EDT     0.00 knots Slack
Mon -- 10:51 AM EDT     0.35 knots Max Flood
Mon -- 01:20 PM EDT     Moonset
Mon -- 01:22 PM EDT     -0.00 knots Slack
Mon -- 04:19 PM EDT     -0.45 knots Max Ebb
Mon -- 06:54 PM EDT     Sunset
Mon -- 06:59 PM EDT     0.00 knots Slack
Mon -- 10:44 PM EDT     Moonrise
Mon -- 10:47 PM EDT     0.83 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.2-0.2-0.5-0.7-0.8-0.6-0.4-0.10.10.30.30.30.1-0.1-0.3-0.4-0.4-0.300.30.60.80.8

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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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