Friday, September18, 2020
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Marine Weather and Tides
Prince Frederick, MD

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 6:51AMSunset 7:12PM Friday September 18, 2020 7:27 AM EDT (11:27 UTC) Moonrise 7:02AMMoonset 7:17PM Illumination 1% Phase: Waxing Crescent; Moon at 1 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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ANZ533 Chesapeake Bay From North Beach To Drum Point- 437 Am Edt Fri Sep 18 2020
.small craft advisory in effect through late tonight...
Rest of the overnight..NE winds 10 kt. Waves 2 ft. Showers. Vsby 1 nm or less.
Today..N winds 10 to 15 kt. Gusts up to 25 kt in the late morning and afternoon. Waves 3 ft. Showers likely. Vsby 1 to 3 nm.
Tonight..N winds 15 to 20 kt with gusts to 30 kt. Waves 4 ft.
Sat..NE winds 10 to 15 kt. Gusts up to 25 kt in the morning. Waves 2 to 3 ft.
Sat night..NE winds 10 to 15 kt. Waves 1 to 2 ft.
Sun..NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Sun night..NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Mon..N winds 10 to 15 kt. Waves 1 to 2 ft.
Tue..NW winds 10 kt. Waves 1 ft.
ANZ500 437 Am Edt Fri Sep 18 2020
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A cold front will cross the middle atlantic early today as the remnants of sally move off the carolina coast. Canadian high pressure will follow for the weekend into early next week. Small craft advisories may be needed Saturday.


7 Day Forecast for Marine Location Near Prince Frederick, MD
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location: 38.59, -76.49     debug


Area Discussion for - Baltimore, MD/Washington
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FXUS61 KLWX 180807 AFDLWX

Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 407 AM EDT Fri Sep 18 2020

SYNOPSIS. A cold front will cross the Middle Atlantic early today as the remnants of Sally move off the Carolina coast. Canadian high pressure will follow for the weekend into early next week.

NEAR TERM /THROUGH TONIGHT/. Patchy fog or light drizzle north of U.S. 50 and along and west of the Blue Ridge Mountains through daybreak. Areas to the south and east will see light rain or moderate drizzle end from northwest to southeast by daybreak.

Cloudy skies will break for some sunshine around midday today and continue through this afternoon. High pressure will build in from the northwest today and tonight, bringing dry conditions and cooler temperatures, especially at night. A gusty northerly wind of 25 to 30 mph is possible around midday and this afternoon.

High temperatures should reach 70 degrees for most of the region this afternoon. Temperatures will be cool tonight, generally in the 40s and 50s.

SHORT TERM /SATURDAY THROUGH SUNDAY NIGHT/. The cooler temperatures will prevail Saturday with highs in the 60s. Low temperatures Saturday night will likely dip into the 40s for most, with 30s in outlying areas where winds go light. Patchy frost is possible where temperatures dip into the middle 30s.

High pressure will remain in control Sunday and Sunday night, as well. Cooler than average temperatures expected with a steady north to northeast wind.

LONG TERM /MONDAY THROUGH THURSDAY/. A relatively quiet pattern will reign through the long term. At the start, northerly flow aloft will dominate as a closed low sits over the western Atlantic and a ridge is positioned over the south- central US. This will result in a cool high pressure centered over the St. Lawrence Valley to our north and a surface low (Teddy?) well east of the coast, with a northerly surface flow as well.

The upper-level pattern will continue essentially unchanged on Tuesday, though the surface high will shift further south towards the southern Appalachians while the surface low (Teddy?) will shift northward well off the coast.

By Wednesday, the closed upper low will open up and lift northeast, with the upper ridge migrating eastward. This will allow surface low pressure (Teddy?) to retreat northeast further away into the Canadian Maritimes with surface high pressure to our south, allowing a milder flow of air to reach us.

By Thursday, the upper ridge will be over our region, but weakening and transient by this point as another upper shortwave approaches from the northwest. At the surface, this will mean we have a cold front approaching from the northwest, but a mild air mass will remain in place.

With no features of significance actually crossing our region, the chance of precip will be near zero, but temperatures will change noticeably, with below normal readings Monday rising to slightly above normal by Thursday.

AVIATION /08Z FRIDAY THROUGH TUESDAY/. Brief IFR conditions at a few terminals due to low cigs and/or visbis to start this morning. Otherwise, VFR conditions will gradually unfold from northwest to southeast with arrival of drier air and a modest northerly wind.

VFR conditions again tonight through Sunday night.

No restrictions are expected Monday and Tuesday as high pressure should dominate with northerly winds and clear to partly cloudy skies. Little if any fog is anticipated as well.

MARINE. Small craft Advisories are in effect through tonight. These may need to be expanded in time through Saturday midday. Otherwise, no marine hazards Saturday night through Sunday night.

Small Craft Advisory conditions are possible Monday and Tuesday as surface high pressure to the north and west interacts with a potential low pressure (Teddy?) as it passes well to our east.

TIDES/COASTAL FLOODING. Northerly flow behind a cold front today should cause water levels to decrease especially over the upper tidal Potomac River and upper reaches of the Chesapeake Bay, but excess water will probably get trapped over the lower parts of the bay. This water may return north later this weekend.

LWX WATCHES/WARNINGS/ADVISORIES. DC . None. MD . None. VA . None. WV . None. MARINE . Small Craft Advisory until 6 AM EDT Saturday for ANZ530>533- 536-538>542. Small Craft Advisory until 6 AM EDT Saturday for ANZ534-537- 543. Small Craft Advisory until midnight EDT tonight for ANZ535.

SYNOPSIS . RCM/KLW NEAR TERM . KLW SHORT TERM . KLW LONG TERM . RCM AVIATION . RCM/KLW MARINE . RCM/KLW TIDES/COASTAL FLOODING . DHOF/RCM


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44062 - Gooses Reef, MD 5 mi52 min N 12 G 12 69°F 75°F
COVM2 - 8577018 - Cove Point LNG Pier, MD 14 mi58 min NNE 8 G 14 1011.8 hPa
BSLM2 - Chesapeake Bay, MD 18 mi118 min Calm 1011 hPa
SLIM2 - 8577330 - Solomons Island, MD 19 mi58 min NNE 5.1 G 8 67°F 76°F1011 hPa
TPLM2 - Thomas Point, MD 22 mi88 min NE 5.1 G 6 68°F 75°F1012.7 hPa (-0.5)67°F
CA2 - 8571892 - Cambridge, MD 22 mi58 min N 5.1 G 8 67°F 74°F1011.3 hPa
APAM2 - 8575512 - Annapolis, MD 27 mi58 min NW 8 G 9.9 68°F 75°F1011.7 hPa
CPVM2 29 mi58 min 69°F 66°F
PPTM2 - 8578240 - Piney Point, MD 32 mi58 min NNE 6 G 8
NCDV2 34 mi58 min N 2.9 G 4.1 67°F 75°F1011.1 hPa
WASD2 - 8594900 - Washington, DC 34 mi58 min N 4.1 G 8 67°F 75°F1012.6 hPa
BISM2 - 8571421 - Bishops Head, MD 35 mi58 min N 6 G 12 67°F 72°F1010.6 hPa
LWTV2 - 8635750 - Lewisetta, VA 41 mi58 min NE 9.9 G 16 69°F 72°F1010.7 hPa
FSNM2 44 mi58 min N 9.9 G 13 65°F 1012.1 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 44 mi58 min N 9.9 G 11 65°F 1012.2 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 45 mi58 min NE 4.1 G 8.9 66°F 74°F1012.4 hPa
BLTM2 - 8574680 - Baltimore, MD 47 mi58 min NNE 8 G 9.9 65°F 76°F1012 hPa

Wind History for Cove Point LNG Pier, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
St Marys County Airport, MD19 mi33 minN 010.00 miOvercast64°F62°F94%1011.8 hPa
Patuxent River, Naval Air Station, MD21 mi36 minNNE 810.00 miMostly Cloudy68°F63°F84%1011.1 hPa

Link to 5 minute data for K2W6

Wind History from 2W6 (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmCalmE3E3CalmCalmE3E3E4E5NE3NE3NE4NE4N3CalmCalm
1 day agoCalmCalmCalmCalmSE3CalmCalmE4SE4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
2 days agoCalmNE3NE6CalmN6CalmNE4N3N4N4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm

Tide / Current Tables for Plum Point, Maryland
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Plum Point
Click for Map
Fri -- 04:17 AM EDT     1.51 feet High Tide
Fri -- 06:50 AM EDT     Sunrise
Fri -- 08:02 AM EDT     Moonrise
Fri -- 10:50 AM EDT     0.27 feet Low Tide
Fri -- 04:48 PM EDT     1.52 feet High Tide
Fri -- 07:08 PM EDT     Sunset
Fri -- 08:17 PM EDT     Moonset
Fri -- 11:19 PM EDT     0.36 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.81.11.41.51.51.310.70.50.30.30.40.60.91.31.51.51.41.20.90.70.50.4

Tide / Current Tables for Broomes Island, 0.4 mile south of, Maryland Current
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Broomes Island
Click for MapFlood direction 290 true
Ebb direction 110 true

Fri -- 01:10 AM EDT     0.46 knots Max Flood
Fri -- 04:27 AM EDT     -0.00 knots Slack
Fri -- 06:50 AM EDT     Sunrise
Fri -- 07:32 AM EDT     -0.56 knots Max Ebb
Fri -- 08:02 AM EDT     Moonrise
Fri -- 10:36 AM EDT     0.00 knots Slack
Fri -- 01:32 PM EDT     0.51 knots Max Flood
Fri -- 04:56 PM EDT     -0.00 knots Slack
Fri -- 07:08 PM EDT     Sunset
Fri -- 08:04 PM EDT     -0.60 knots Max Ebb
Fri -- 08:17 PM EDT     Moonset
Fri -- 11:17 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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0.40.50.40.30.1-0.2-0.4-0.5-0.5-0.4-0.20.10.30.50.50.40.2-0-0.3-0.5-0.6-0.5-0.3-0.1

Weather Map
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wmap_A
GEOS Local Image of    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
Ground Weather Radar Station Dover AFB, DE
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