Wednesday, October20, 2021
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Marine Weather and Tides
Bensville, 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 7:21AMSunset 6:23PM Wednesday October 20, 2021 9:52 AM EDT (13:52 UTC) Moonrise 5:40PMMoonset 6:12AM Illumination 100% Phase: Full Moon; Moon at 14 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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ANZ535 Tidal Potomac From Key Bridge To Indian Head- 735 Am Edt Wed Oct 20 2021
Today..W winds 5 to 10 kt. Waves 1 ft.
Tonight..SW winds around 5 kt. Waves 1 ft.
Thu..SW winds 5 to 10 kt. Waves 1 ft.
Thu night..SW winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
Fri..NW winds 5 kt. Waves less than 1 ft.
Fri night..N winds around 5 kt. Waves 1 ft.
Sat..NW winds 5 to 10 kt. Waves 1 ft.
Sun..N winds around 5 kt. Waves 1 ft.
ANZ500 735 Am Edt Wed Oct 20 2021
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure remains in control today before shifting offshore Thursday. With the high shifting offshore, a southerly flow will ensue before a cold front crosses the waters overnight into Friday morning. As a result, small craft advisories may be needed Thursday and Thursday night.


7 Day Forecast for Marine Location Near Bensville, MD
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location: 38.62, -77     debug


Area Discussion for - Baltimore, MD/Washington
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FXUS61 KLWX 200739 AFDLWX

Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 339 AM EDT Wed Oct 20 2021

SYNOPSIS. Expansive high pressure continues over the southeastern states and will gradually shift northeastward through Thursday. Then, multiple fronts will cross the area Thursday night through early Saturday. High pressure may return for a time thereafter.

NEAR TERM /THROUGH TONIGHT/. Latest analysis shows upper level ridging across the Midwest as expansive high pressure, extending from the Mid Atlantic down to the Gulf states, persists. A few scattered cirrus clouds continue to traverse eastward across the region early this morning, associated with a weak shortwave that's slated to cross the area later this morning. As the shortwave exits offshore, a small pressure surge will ensue which will cause some uptick in wind gusts this afternoon. However, any gusts are expected to subside early this evening as the high inches closer to our region. Otherwise, expect mostly sunny conditions today with highs in the mid 70s for most, 60s across the mountains. Dry weather is slated to continue tonight, with lows in the 40s for most, slightly warmer across the metro areas.

SHORT TERM /THURSDAY THROUGH FRIDAY NIGHT/. Aforementioned high pressure will slide offshore Thursday as low pressure tracks eastward across the Great Lakes into New England. At the very least, the first half of Thursday appears dry and unseasonably warm under a southerly wind. High temperatures Thursday will jump into the upper 70s for most, cooler across the higher terrain. As we continue into Thursday late afternoon, the low's associated cold front will then approach from the west, resulting in increased chances for showers. However with most of the forcing associated with the parent low remaining well to our north, appears most of the shower activity will be more concentrated across the mountains where upslope processes will provide the best local forcing. While a few sprinkles are possible east of the Blue Ridge, chances for any measurable rain appear slim as the front loses any significant moisture as it tracks eastward through Friday morning.

While most of Friday appears mainly dry, colder air aloft will cause an increase in cloud cover by Friday afternoon and could produce a spot shower as a second upper level shortwave pivots eastward across the region late Friday night into Saturday morning.


LONG TERM /FRIDAY THROUGH TUESDAY/. The corridor of lower mid-level heights remains fixed in the vicinity of Hudson Bay. To the south, deep-layered cyclonic flow is forecast to extend over the Great Lakes and northeastern U.S. This broad negative height anomaly gradually shifts eastward during the weekend with the accompanying stronger forcing likely to stay north of the area. At the surface, the Mid-Atlantic region will be in the post-frontal air mass before high pressure builds in from the Tennessee Valley to conclude the weekend. A decent radiational cooling night should unfold Saturday night which lowers temperatures into the mid/upper 30s across the Alleghenies. A good chunk of the weekend stays dry with more seasonable temperatures for late October. Increasing warm advection in advance of an upstream trough will enhance shower chances by late Sunday.

A fairly substantial shortwave ejects out of the Central Plains and Middle Mississippi Valley Sunday evening into Monday. The 00Z deterministic model suite depict a variety of solutions heading into next week. Most notably, the 00Z GFS/CMC favor a closed low moving through the area on Tuesday while the 00Z ECMWF depicts a more sheared solution tracking across the central Appalachians. The signal is quite washed out in the ensembles so it is difficult to discern too many details at this time. Given the signal of a trough approaching from the west, will maintain low-end shower chances for Monday and Tuesday. This is to accompanied by rather seasonable temperatures for the final week of October. As expected, a great deal of spread is evident in the temperature forecast. However, the middle of the road solution would favor numbers close to seasonal averages.

AVIATION /07Z WEDNESDAY THROUGH SUNDAY/. High pressure in control of the region will result in continued VFR conditions. Westerly winds uptick slightly this afternoon but are expected to become light and variable late Wednesday night into Thursday. The winds will then shift to the south on Thursday as high pressure tracks offshore. A weak cold front will cross the region late Thursday into Friday, which will shift the winds once again to the WNW. The front appears to be mainly moisture starved. Thus, not expecting much in terms of precip across the terminals. However, MRB has the best chance at seeing some showers during this time. Clouds expected to gradually increase on Friday, but expect conditions to remain VFR for now.

VFR conditions can be expected this weekend along with mostly dry weather. Some warm advection showers may arrive late Sunday, but not expecting any restrictions. Winds start off as northwesterly before turning a bit more variable to close out the weekend.

MARINE. An inversion over the waters has holstered most of the wind gusts early this morning. Thus, have trimmed the SCA some to only include the middle and upper Chesapeake Bay where a few gusts of 18 knots persist. The threat for SCA conditions continue through mid morning. However some hi-res models indicate SCA conditions may linger through the late morning hours as a small pressure surge ensues through this afternoon. However confidence in this occurrence remains low at this time. Thus will pass along to the day shift to reassess need for any additional SCA's.

Southwesterly winds will take hold by Thursday, and a low pressure system will move through the Great Lakes. A cold front will reach the waters late Thursday night or possibly Friday. A Small Craft Advisory may be needed during this time for portions of the waters as winds increase ahead of the front.

In the wake of the cold front, winds stay mainly northwesterly on Saturday with sub-SCA conditions anticipated. High pressure arrives for Sunday which leads to a bit more variability in the prevailing wind direction. Aside from a few showers late Sunday, the weekend should stay dry.

TIDES/COASTAL FLOODING. Anamolies rise slightly late today into Thursday as the winds become more southerly. While not anticipating any coastal flooding, a few more sensitive sites like Annapolis may hit action stage during this time. Once the winds become more WNW, anamolies will once again decrease through the weekend.

LWX WATCHES/WARNINGS/ADVISORIES. DC . None. MD . None. VA . None. WV . None. MARINE . Small Craft Advisory until 9 AM EDT this morning for ANZ531- 532-539. Small Craft Advisory until 5 AM EDT early this morning for ANZ530-533-540-541.

SYNOPSIS . SOUZA NEAR TERM . SOUZA SHORT TERM . SOUZA LONG TERM . BRO AVIATION . SOUZA/BRO MARINE . SOUZA/BRO TIDES/COASTAL FLOODING . SOUZA


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WASD2 - 8594900 - Washington, DC 18 mi65 min S 4.1G5.1 60°F 67°F1021.4 hPa
BSLM2 - Chesapeake Bay, MD 19 mi143 min 0 47°F 1020 hPa47°F
NCDV2 21 mi65 min 0G2.9 58°F 65°F1021.6 hPa
44062 - Gooses Reef, MD 31 mi35 min W 18G21 63°F 68°F2 ft1022.6 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 36 mi65 min SW 12G17 63°F 1021.3 hPa
SLIM2 - 8577330 - Solomons Island, MD 36 mi65 min W 4.1G7 63°F 69°F1021.5 hPa
TPLM2 - Thomas Point, MD 36 mi53 min W 18G19 62°F 67°F1021.6 hPa (+0.9)
APAM2 - 8575512 - Annapolis, MD 37 mi65 min W 5.1G8.9 65°F 69°F1020.4 hPa
44063 - Annapolis 38 mi35 min WNW 16G23 63°F 67°F1 ft1021.8 hPa
CPVM2 42 mi65 min 65°F 48°F
PPTM2 - 8578240 - Piney Point, MD 42 mi65 min WNW 6G8
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 48 mi65 min SW 6G7 61°F 1020.5 hPa
FSNM2 48 mi65 min W 6G8 62°F 1020.3 hPa
CA2 - 8571892 - Cambridge, MD 49 mi65 min W 4.1G7 63°F 64°F1021.1 hPa

Wind History for Washington, DC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Fort Belvoir, VA12 mi57 minN 010.00 miFair54°F53°F94%1022.3 hPa
Camp Springs / Andrews Air Force Base, MD16 mi57 minW 610.00 miFair61°F46°F58%1021.6 hPa
Washington/Reagan National Airport, DC, VA17 mi61 minSSW 510.00 miA Few Clouds59°F48°F67%1021.9 hPa
Quantico Marine Corps Airfield - Turner Field, VA18 mi57 minWNW 39.00 miFair56°F48°F75%1022.8 hPa

Link to 5 minute data for KDAA

Wind History from DAA (wind in knots)
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Last 24hrW3SW4S4W7W6W5SW5SW50000000000000000
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Tide / Current Tables for Riverview, Maryland
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Riverview
Click for Map
Wed -- 02:48 AM EDT     0.09 feet Low Tide
Wed -- 07:12 AM EDT     Moonset
Wed -- 07:22 AM EDT     Sunrise
Wed -- 08:33 AM EDT     2.79 feet High Tide
Wed -- 10:57 AM EDT     Full Moon
Wed -- 02:57 PM EDT     0.12 feet Low Tide
Wed -- 06:22 PM EDT     Sunset
Wed -- 06:39 PM EDT     Moonrise
Wed -- 08:50 PM EDT     3.00 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Tide / Current Tables for Fort Washington, Maryland
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Fort Washington
Click for Map
Wed -- 02:48 AM EDT     0.09 feet Low Tide
Wed -- 07:12 AM EDT     Moonset
Wed -- 07:22 AM EDT     Sunrise
Wed -- 08:33 AM EDT     2.67 feet High Tide
Wed -- 10:57 AM EDT     Full Moon
Wed -- 02:57 PM EDT     0.12 feet Low Tide
Wed -- 06:22 PM EDT     Sunset
Wed -- 06:39 PM EDT     Moonrise
Wed -- 08:50 PM EDT     2.87 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Weather Map
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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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