Tuesday, July27, 2021
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Marine Weather and Tides
Lake Shore, 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 6:01AMSunset 8:23PM Tuesday July 27, 2021 2:23 AM EDT (06:23 UTC) Moonrise 9:56PMMoonset 8:41AM Illumination 91% Phase: Waning Gibbous; Moon at 18 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- 135 Am Edt Tue Jul 27 2021
Overnight..SW winds around 5 kt. Waves 1 ft.
Tue..SW winds around 5 kt. Waves flat.
Tue night..S winds 5 to 10 kt...becoming W late. Waves 1 ft.
Wed..W winds 5 kt. Waves less than 1 ft. A chance of showers.
Wed night..SE winds 5 kt. Waves less than 1 ft.
Thu..S winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.
Thu night..W winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.
Fri..N winds 5 to 10 kt. Waves 1 ft. A chance of showers in the morning.
Sat..NW winds 5 to 10 kt...becoming sw. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 135 Am Edt Tue Jul 27 2021
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A cold front will become stationary and eventually stall out over the carolinas through tonight as weak high pressure builds back into the region. A weak front will drop across the waters Wednesday before a more potent cold front sweeps through the area Thursday into Friday. Small craft advisories may be required for portions of the waters Thursday through Friday.


7 Day Forecast for Marine Location Near Lake Shore, MD
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location: 39.1, -76.45     debug


Area Discussion for - Baltimore, MD/Washington
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FXUS61 KLWX 270134 AAA AFDLWX

Area Forecast Discussion . UPDATED National Weather Service Baltimore MD/Washington DC 934 PM EDT Mon Jul 26 2021

SYNOPSIS. A weak cold front will stall out over central Virginia into southern Maryland through Tuesday. Another weak cold front will approach from the north Wednesday while an upper-level disturbance passes through. A stronger cold front will pass through late Thursday into early Friday and high pressure will build overhead for Saturday before moving offshore Sunday.

NEAR TERM /THROUGH TUESDAY/.

Two colliding outflow boundaries earlier this evening over central Maryland and northern Virginia resulted in a new line of thunderstorms that caused havoc in around the National Capital Region. These storms continue to move south and should exit the Fredericksburg area by 11 PM if not sooner. Radar trends indicate these storms are finally weakening. Once these storms exit the area in another hour or so, dry and tranquil conditions are epxected overnight. Some patchy fog is possible in areas that got the heaviest rains.

SHORT TERM /TUESDAY NIGHT THROUGH WEDNESDAY NIGHT/. High pressure will briefly build into our region on Tuesday with light winds continuing out of the north. An upper trough north of the Great Lakes is expected to drop south into PA. Shortwave energy along the southern parts of the trough may produce some isolated showers on Tuesday. I believe the threat remains relatively for showers on Tuesday especially with a continued northwesterly flow aloft advecting in drier air into the region. The combination of mostly clear skies along with a light flow will allow temps to rise up into the low to mid 90s on Tuesday. Typically as we get temps up into the mid 90s, the heat indices will become an issue but the lack of moisture advection will limit heat indexes to the 90s.

An upper level ridge will build over the central US Tuesday through Wednesday with a trough axis over the NE US. The positioning of the upper ridge will place our region in favorable location to allow for shortwaves to move over the ridge and drop down into our region. These shortwaves combined with a front approaching from the north may allow for showers and thunderstorms to form over the northern half of our CWA especially considering that temps will be hovering in the 90s. The main limiting factor for storm development will be the lack of good moisture in place on Wednesday. Afternoon temps be warm once again in the low to mid 90s. A marginal risk for SVR weather has been issued by SPC for areas along the MD/PA border for Wednesday due to the combination of shortwaves and a front slowly approaching from the north.

LONG TERM /THURSDAY THROUGH MONDAY/. An upper-level trough will strengthen over New England Thursday and Friday while the trough axis extends down through the Mid-Atlantic. A potent upper-level disturbance and jetmax associated with the trough will dig into New England during this time, and this will allow for a stronger cold front to approach Thursday before passing through Thursday night into Friday.

There will be some return flow ahead of the frontal passage which will allow for instability to develop. At the same time, moderate shear profiles are expected due to stronger northwest winds aloft associated with the upper-level trough and lower heights. Steep low- level lapse rates, increasing instability, stronger shear and forcing from the cold front suggests that thunderstorms are possible, and some storms may be severe. The best chance for severe appears to be Thursday afternoon and evening, but timing could shift depending on exactly when the cold front passes through.

The cold front will continue to push to the south for Friday into Friday night. However, the boundary could get hung up across our extreme southern zones for a period Friday, so a shower or thunderstorm is possible across those areas, but for most areas it will turn out less humid and dry.

High pressure will build overhead Friday night and Saturday, bringing dry and cooler conditions along with lower humidity. The high will move offshore for Sunday and warmer air will return.

AVIATION /02Z TUESDAY THROUGH SATURDAY/. Dry conditions are expected through Tue. A slight risk of thunderstorms Wednesday.

A cold front will pass through late Thursday into early Friday. A few thunderstorms are possible ahead of the boundary, especially Thursday afternoon and evening. Some storms may become severe, with damaging winds being the primary threat.

The boundary will push to the south for Friday, but it may get hung up close to KCHO. An isolated storm near KCHO is possible, but other areas should be dry with northwest winds.

MARINE.

A cold front will approach the waters Thursday before passing through Thursday night into Friday. Winds may approach SCA criteria ahead of the front late Thursday into Thursday night (from southerly winds), and again behind the front late Thursday night and Friday (from northwest winds).

A few thunderstorms are possible Thursday afternoon and evening, and some may produce gusty winds. An isolated t-storm near the extreme southern portion of the waters around Tangier Island cannot be completely ruled out Friday afternoon, but most places will be dry.

LWX WATCHES/WARNINGS/ADVISORIES. DC . None. MD . None. VA . None. WV . None. MARINE . None.

SYNOPSIS . LFR NEAR TERM . LFR SHORT TERM . JMG LONG TERM . BJL AVIATION . LFR MARINE . LFR


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CPVM2 8 mi54 min 78°F 72°F
APAM2 - 8575512 - Annapolis, MD 8 mi54 min W 5.1 G 6 77°F 84°F1013.9 hPa
44063 - Annapolis 9 mi48 min WNW 9.7 G 9.7 76°F 82°F1015 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 9 mi54 min WNW 6 G 6 78°F 1014.2 hPa
FSNM2 9 mi60 min WNW 8 G 8 78°F 1014.3 hPa
BLTM2 - 8574680 - Baltimore, MD 13 mi54 min NW 1.9 G 7 78°F 83°F1014.1 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 13 mi54 min WNW 4.1 G 6 80°F 83°F1014.4 hPa
TPLM2 - Thomas Point, MD 14 mi84 min W 6 G 7 77°F 80°F1015.4 hPa (+0.0)73°F
BSLM2 - Chesapeake Bay, MD 26 mi54 min Calm 69°F 1014 hPa68°F
WASD2 - 8594900 - Washington, DC 34 mi54 min WNW 1.9 G 4.1 76°F 83°F1014.7 hPa
44062 - Gooses Reef, MD 38 mi48 min NNW 5.8 G 7.8 77°F 81°F1014.7 hPa
CA2 - 8571892 - Cambridge, MD 42 mi54 min SSW 2.9 G 5.1 79°F 83°F1014 hPa
CHCM2 - 8573927 - Chesapeake City, MD 45 mi54 min N 1.9 G 2.9 72°F 83°F1014.3 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 48 mi54 min W 1.9 G 2.9 79°F 1013.9 hPa

Wind History for Francis Scott Key Bridge NE Tower, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Annapolis, United States Naval Academy, MD8 mi30 minNW 49.00 miFair77°F71°F82%1014.1 hPa
Baltimore, Baltimore-Washington International Airport, MD13 mi30 minW 39.00 miFair73°F70°F90%1014.2 hPa
Baltimore / Martin, MD17 mi29 minW 410.00 miFair73°F72°F94%1014.6 hPa
Fort Meade / Tipton, MD17 mi29 minN 04.00 miFair70°F68°F94%1015.2 hPa

Link to 5 minute data for KNAK

Wind History from NAK (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmSW3CalmNW4CalmNW3SE8SE6SE8E7SE6SE7SE6N3CalmCalmNW3N3NW3NW4
1 day agoS8S4S7S6S4S3S53S8S6----SE10S12S8S10S6S9S54CalmCalm3Calm
2 days agoCalmCalmCalmCalmCalmCalmCalmE33S9
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Tide / Current Tables for Mountain Point, Magothy River, Maryland
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Mountain Point
Click for Map
Tue -- 03:26 AM EDT     0.30 feet Low Tide
Tue -- 06:02 AM EDT     Sunrise
Tue -- 09:40 AM EDT     1.30 feet High Tide
Tue -- 09:41 AM EDT     Moonset
Tue -- 04:42 PM EDT     0.33 feet Low Tide
Tue -- 08:21 PM EDT     Sunset
Tue -- 10:06 PM EDT     1.07 feet High Tide
Tue -- 10:55 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.50.40.30.30.40.60.91.11.31.31.210.80.60.50.40.30.40.60.811.11

Tide / Current Tables for Baltimore Harbor Approach, Maryland Current
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Baltimore Harbor Approach
Click for Map
Tue -- 02:03 AM EDT     -0.69 knots Max Ebb
Tue -- 04:48 AM EDT     0.00 knots Slack
Tue -- 06:02 AM EDT     Sunrise
Tue -- 08:09 AM EDT     0.96 knots Max Flood
Tue -- 09:41 AM EDT     Moonset
Tue -- 11:20 AM EDT     -0.00 knots Slack
Tue -- 02:39 PM EDT     -1.04 knots Max Ebb
Tue -- 06:03 PM EDT     0.00 knots Slack
Tue -- 08:21 PM EDT     Sunset
Tue -- 09:01 PM EDT     0.81 knots Max Flood
Tue -- 10:55 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.3-0.6-0.7-0.6-0.30.10.50.810.90.60.2-0.3-0.7-1-1-0.8-0.5-00.40.70.80.70.4

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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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