Friday, September24, 2021
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Marine Weather and Tides
Bowleys Quarters, 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 6:54AMSunset 7:00PM Friday September 24, 2021 11:17 PM EDT (03:17 UTC) Moonrise 8:00PMMoonset 9:22AM Illumination 86% 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- 1036 Pm Edt Fri Sep 24 2021
Rest of tonight..N winds 5 kt. Waves less than 1 ft.
Sat..W winds around 5 kt. Waves flat.
Sat night..W winds 5 to 10 kt. Gusts up to 20 kt after midnight. Waves 1 to 2 ft.
Sun..NW winds 10 kt. Waves 2 ft.
Sun night..W winds 5 to 10 kt. Waves 1 ft.
Mon..W winds 5 to 10 kt. Waves 1 ft.
Mon night..SW winds 5 to 10 kt. Waves 1 ft.
Tue..NW winds 5 kt. Waves less than 1 ft.
Wed..N winds 5 to 10 kt. Waves 1 ft.
ANZ500 1036 Pm Edt Fri Sep 24 2021
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure building into the region from the west will remain in control through the weekend. A weak cold front will cross the area Saturday night into Sunday. High pressure will return through early next week. Another weak cold front may cross the waters late Tuesday. Small craft advisories may be needed Saturday night and Sunday, and again Monday afternoon through Tuesday.


7 Day Forecast for Marine Location Near Bowleys Quarters, MD
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location: 39.33, -76.33     debug


Area Discussion for - Baltimore, MD/Washington
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FXUS61 KLWX 250127 AFDLWX

Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 927 PM EDT Fri Sep 24 2021

SYNOPSIS. Dry and cooler through Saturday with high pressure overhead. Weak cold front moves through by Saturday night. High pressure returns Sunday and Monday from the SE before the next cold front passes through by the middle portion of the work week.

NEAR TERM /THROUGH SATURDAY/. Some patchy fog is possible in the valleys tonight. Otherwise, dry and fall-like temperatures expected through the period. Overnight lows will be in the 40s and 50s with light variable winds.

High pressure will build into the region Saturday to keep the dry and seasonable conditions going through the afternoon.

SHORT TERM /SATURDAY NIGHT THROUGH SUNDAY NIGHT/. An upper level trough will approach the area by Saturday night, leaving the area of high pressure to briefly weaken. A moisture starved cold front will approach from the west and may bring some showers along and west of the Allegheny Front but still not expected to produce much rain to the east as westerly downsloping continues and keeps an already moisture-ridden front from progressing further eastward in terms of precip. Nonetheless, will keep some low end PoPs for areas just beyond the Alleghenies for the chance for an isolated shower during the time period.

As the front passes, expect winds to increase across a large portion of the area on Sunday. High pressure returns from the SE and will allow for conditions to return to mostly clear for the remainder of the period with light winds as high pressure moves closer overhead.

LONG TERM /MONDAY THROUGH FRIDAY/. By Monday morning, it appears a deep upper-level low will be digging toward the coast of British Columbia, Canada. This will cause an amplification of ridging over the north-central CONUS. Meanwhile, a weaker upper- level low looks like it will get caught beneath the ridge over the Four Corners region, while another upper-level low spins over southeastern Canada - its eastward progress halted by another amplifying ridge/trough couplet downstream near the Davis Strait/Iceland, respectively.

As the pattern amplifies next week, model guidance begins to struggle with the evolution of the low over southeastern Canada. The sharp amplification amid persistent ridging near the west-central Atlantic Ocean may cause the low to split, with a piece of it retrograding back down the East Coast by the second half of next week. Before that happens, a surface cold front ahead of the upper- level trough/low should progress southward through the area around Tuesday. Depending on the strength of the front and how much moisture is present along and ahead of it, showers or even a few thunderstorms may result. Shear will increase as well, so there could be a conditional severe weather (damaging wind) risk if any appreciable instability develops along and ahead of the front.

General onshore flow looks likely the second half of the week, but how strong remains in question. The weather will depend very highly on what happens with the aforementioned retrograding low, a scenario riddled with very high uncertainty at this time range.

AVIATION /02Z SATURDAY THROUGH WEDNESDAY/. Some patchy fog possible tonight but guidance remains mainly unsupportive of this occurring across the western terminals (CHO/MRB).

VFR conditions continue through Sunday with only a few showers possible Saturday night with MRB being the only likely candidate for any precip to make it in the terminals. With this weak frontal passage, winds will shift from out of the SSW to W Saturday night with potential for some gusts reaching 15-20 knots during the evening and overnight hours into Sunday.

Prevailing VFR conditions are expected Monday into Tuesday, though some patchy early morning fog can't be ruled out. There is a chance for showers or a few thunderstorms on Tuesday along and ahead of an approaching cold front. The wind should be generally southwesterly Monday into Tuesday before becoming northwesterly behind the front.

MARINE. As an area of high pressure builds overhead, winds will calm tonight. Weak cold front approaches from the west and will increase winds for Saturday night into Sunday, yielding at least a SCA. If guidance continues to trend upward, gales may be possible for the lower part of the waters.

Gustiness may increase a bit out of the southwest Monday afternoon into Tuesday ahead of an approaching front, and again behind said front Tuesday night. Small Craft Advisories may be needed at times.

TIDES/COASTAL FLOODING. Anomalies will remain near one foot near the mouth of the bay. As northwesterly flow becomes lighter through tonight, some or all of this excess water will return northward. The increase in water levels will re-introduce a threat for minor tidal flooding, especially at more sensitive sites like Annapolis, Straits Point, and DC SW Waterfront.

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

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TCBM2 - 8573364 - Tolchester Beach, MD 9 mi48 min E 4.1 G 4.1 59°F 75°F1018.8 hPa
FSNM2 13 mi48 min ENE 1.9 G 4.1 68°F 1018.3 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 13 mi48 min ESE 2.9 G 2.9 69°F 1018.4 hPa
BLTM2 - 8574680 - Baltimore, MD 14 mi48 min WSW 1.9 G 2.9 64°F 77°F1018 hPa
CPVM2 23 mi48 min 68°F 53°F
APAM2 - 8575512 - Annapolis, MD 25 mi48 min W 1.9 G 2.9 63°F 77°F1018.2 hPa
44063 - Annapolis 26 mi36 min 65°F 75°F1018.7 hPa
TPLM2 - Thomas Point, MD 30 mi78 min NW 5.1 G 5.1 70°F 75°F1019.6 hPa (+0.7)
CHCM2 - 8573927 - Chesapeake City, MD 31 mi48 min SSE 2.9 G 2.9 57°F 75°F1018.9 hPa
BSLM2 - Chesapeake Bay, MD 43 mi48 min Calm 55°F 1018 hPa55°F
DELD1 - 8551762 - Delaware City, DE 43 mi48 min Calm G 0 63°F 74°F1018.6 hPa
RDYD1 - 8551910 - Reedy Point, DE 43 mi48 min 63°F 74°F1018.2 hPa
WASD2 - 8594900 - Washington, DC 48 mi48 min Calm G 1 65°F 75°F1018.4 hPa

Wind History for Tolchester Beach, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Baltimore / Martin, MD5 mi23 minN 010.00 miFair59°F59°F100%1019.3 hPa
Phillips Army Air Field / Aberdeen, MD13 mi20 minN 010.00 miFair54°F54°F99%1018.6 hPa
Baltimore, Baltimore-Washington International Airport, MD20 mi24 minWSW 310.00 miFair55°F51°F87%1018.5 hPa

Link to 5 minute data for KMTN

Wind History from MTN (wind in knots)
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W12NW4W4--NW4NW4NW4CalmCalmCalm
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Tide / Current Tables for Battery Point, Gunpowder River, Maryland
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Battery Point
Click for Map
Fri -- 05:15 AM EDT     0.73 feet Low Tide
Fri -- 06:55 AM EDT     Sunrise
Fri -- 10:22 AM EDT     Moonset
Fri -- 10:25 AM EDT     1.58 feet High Tide
Fri -- 04:40 PM EDT     0.42 feet Low Tide
Fri -- 06:58 PM EDT     Sunset
Fri -- 08:59 PM EDT     Moonrise
Fri -- 11:12 PM EDT     1.94 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.71.51.210.80.70.80.91.21.41.61.61.41.10.80.60.50.40.60.81.21.51.81.9

Tide / Current Tables for Baltimore Harbor Approach, Maryland Current
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Baltimore Harbor Approach
Click for Map
Fri -- 02:17 AM EDT     -0.87 knots Max Ebb
Fri -- 05:38 AM EDT     0.00 knots Slack
Fri -- 06:55 AM EDT     Sunrise
Fri -- 08:20 AM EDT     0.60 knots Max Flood
Fri -- 10:21 AM EDT     Moonset
Fri -- 11:06 AM EDT     -0.00 knots Slack
Fri -- 02:10 PM EDT     -0.70 knots Max Ebb
Fri -- 05:02 PM EDT     0.00 knots Slack
Fri -- 06:58 PM EDT     Sunset
Fri -- 08:30 PM EDT     0.96 knots Max Flood
Fri -- 09:00 PM EDT     Moonrise
Fri -- 11:54 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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-0.4-0.7-0.9-0.8-0.6-0.20.10.40.60.60.40-0.3-0.6-0.7-0.6-0.4-00.40.70.90.90.70.4

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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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