Friday, October20, 2017

Marine Weather and Tides
Vienna, MD

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 7:16AMSunset 6:17PM Friday October 20, 2017 2:08 PM EDT (18:08 UTC) Moonrise 6:54AMMoonset 6:12PM Illumination 0% Phase: New Moon; Moon at 0 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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ANZ543 Tangier Sound And The Inland Waters Surrounding Bloodsworth Island- 133 Pm Edt Fri Oct 20 2017
This afternoon..NW winds 10 to 15 kt. Waves 2 ft.
Tonight..NE winds 5 to 10 kt. Waves 1 to 2 ft.
Sat..E winds 5 kt. Waves less than 1 ft.
Sat night..SE winds 5 to 10 kt. Waves 1 ft.
Sun..SE winds 5 to 10 kt. Waves 1 ft.
Sun night..S winds 5 to 10 kt. Waves 1 ft.
Mon..S winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers through the night.
Tue..S winds 20 to 25 kt...becoming sw 15 to 20 kt in the evening, then becoming W 10 kt after midnight. Waves 2 ft...building to 5 ft in the afternoon, then subsiding to 2 to 3 ft. Showers.
ANZ500 133 Pm Edt Fri Oct 20 2017
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will remain near the region through the weekend. A low pressure system will then affect the region early next week. A small craft advisory is likely for portions of the waters Monday through Tuesday. Gales are also possible for portions of the waters on Tuesday.

7 Day Forecast for Marine Location Near Vienna, MD
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location: 38.48, -75.82     debug

Area Discussion for - Wakefield, VA
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Fxus61 kakq 201727
area forecast discussion
national weather service wakefield va
127 pm edt Fri oct 20 2017

High pressure remains over the mid atlantic region through
the weekend... With temperatures gradually warming. The next
cold front is expected to impact the region early next week.

Near term until 6 pm this evening
Sfc hi pres continues to sit INVOF fa through today as ridge
aloft amplifies over the ERN conus. A very weak frontal boundary
will settle S through the area this morning... Turning winds to
the n. Otherwise... Sunny and seasonably warm today. Highs in
the m-u70s... L70s right along the immediate coast.

Short term 6 pm this evening through Sunday
High pres sfc-aloft remains anchored INVOF fa through sat... Then
slowly shifts off the coast Sat night-sun. Other than possible
patchy areas of fg (by late) tonight and again Sat night... Dry-
continued seasonably warm wx expected sat-sun. Lows tonight in
the mainly 45-50f inland... To the l-m50s at the immediate coast.

Highs Sat in the m-u70s... L70s right at the coast. A bit more
cloudiness possible by Sun afternoon as the low level flow
becomes more SE ahead of the next cold front (which will be
entering the oh-tn valleys) - so may become partly sunny vs
mostly sunny. Lows Sat night in the u40s-l50s inland to the
m50s at the coast. Highs Sun ranging through the 70s.

Long term Sunday night through Thursday
Rain chances finally return to the forecast by Monday. A slow-
moving longwave trough pushes E toward the mid atlantic region
early next week. Rain chances expected to hold off until late
mon Mon night across the piedmont... Then into tuey along and
east of i-95. Temps in the remain mild ahead of the front w
lows Sun night in the 50s... Highs Mon in the 70s.

Sfc low pressure deepening over the southeast states Mon night
will get absorbed into a larger upper level trough digging over
the midwest and as far south as the mid-mississippi valley on
tue. Rain will be ongoing as a cold front (extending from ny to
ne ga) is pushed ewd by the incoming upper trough. A much colder
canadian airmass moves into the area behind the cold front
beginning Tue night with showers lingering into wed. Decent cold
air advection paired with a tight pressure gradient will likely
allow dewpoints to plummet while temperatures are slower to
fall respond which is common. Upper trough swings through the
region Wed wed night. Highs near normal Tue (70-75f) with
widespread rain present. Lows Tue night in the upper 40s to
lower 50s inland and mid to upper 50s closer to the coast. Highs
wed near normal to around 5 degrees below normal with readings
in the mid-upper 60s. Much cooler Wed night Thu with lows
generally in the 40s (around 50f immediate coast) and highs of

Aviation 18z Friday through Wednesday
Sfc high pressure remains INVOF of the area through midday sat.

Potential for patchy fg by late tonight early Sat morning under
light winds. Sfc high pressure slides farther offshore sun... W
a cold front expected to push across the local area late mon
through Tue (resulting in at least periodic sub-vfr conditions
in ra lowering CIGS likely.

A large area of surface high pressure over the region will allow for
generally benign conditions over the waters for the next several
days. A weak cold front will push southeast and off the nj coast by
later this morning. This feature will allow for a modest increase in
winds to 10-15 knots later this morning as winds shift to the north.

Waves are only expected to build to around 2 feet for the bay lower
james, and to remain around 3 feet for the coastal waters. Surface
high pressure re-establishes its control over the region Friday
night through Sunday with waves mainly 1 foot and seas of 2 to 3

The next chance for significant weather over the waters does not
come until early next week as a strong cold front approaches from
the west on Monday and slowly crosses the waters late on Tuesday.

The pressure gradient will lead to increasing southerly flow ahead
of the front Monday into early Tuesday, and strong nnw winds behind
the front Tuesday night into Wednesday. Small craft advisories will
likely be needed for most or all of the area during this period.

Akq watches warnings advisories
Md... None.

Nc... None.

Va... None.

Marine... None.

Synopsis... Alb
near term... Alb jdm
short term... Alb mam
long term... Bmd
aviation... Alb jdm
marine... Ajb lkb

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CA2 - 8571892 - Cambridge, MD 15 mi69 min 73°F 67°F1024 hPa (-0.4)
BISM2 - 8571421 - Bishops Head, MD 21 mi69 min NW 8.9 G 11 70°F 65°F1023.4 hPa (-0.8)
COVM2 - 8577018 - Cove Point LNG Pier, MD 30 mi69 min NNE 11 G 13 68°F 1024 hPa (-0.4)
44062 - Gooses Reef, MD 32 mi39 min NNE 9.7 G 12 69°F 1027.5 hPa
SLIM2 - 8577330 - Solomons Island, MD 35 mi69 min NNW 7 G 8.9 71°F 69°F1022.7 hPa (-0.8)
OCIM2 - 8570283 - Ocean City Inlet, MD 40 mi69 min NNE 7 G 11 69°F 67°F1022.9 hPa (-0.7)
44042 - Potomac, MD 41 mi39 min NW 5.8 G 5.8 69°F 1022.5 hPa
LWSD1 - 8557380 - Lewes, DE 43 mi69 min N 8.9 G 12 66°F 65°F1022.5 hPa (-0.6)
TPLM2 - Thomas Point, MD 44 mi69 min NE 5.1 G 6 69°F 68°F
PPTM2 - 8578240 - Piney Point, MD 45 mi75 min NW 8.9 G 11
CPVM2 47 mi69 min 69°F 54°F
44063 - Annapolis 47 mi39 min E 3.9 G 7.8 69°F 1022.1 hPa
DRSD1 - Delaware Reserve, DE 47 mi159 min NW 2.9 71°F 1023 hPa50°F
LWTV2 - 8635750 - Lewisetta, VA 48 mi69 min NNE 2.9 G 5.1 71°F 65°F1023.2 hPa (-0.8)
APAM2 - 8575512 - Annapolis, MD 49 mi69 min 71°F 1022.8 hPa (-0.6)

Wind History for Cambridge, MD
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1 day
2 days

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Cambridge-Dorchester Airport, MD12 mi84 minNW 710.00 miFair72°F51°F50%1023.4 hPa
Salisbury, Salisbury-Ocean City Wicomico County Regional Airport, MD20 mi75 minNW 810.00 miFair75°F52°F45%1022.8 hPa

Wind History from CGE (wind in knots)
Last 24hr4
1 day ago53443CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSW46S8SW7
2 days agoCalm4CalmCalmCalmCalmCalmCalmCalmCalmCalmSE3CalmCalmCalmCalmCalmCalmCalmCalmW3CalmW5Calm

Tide / Current Tables for Vienna, Nanticoke River, Chesapeake Bay, Maryland
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Fri -- 05:35 AM EDT     2.56 feet High Tide
Fri -- 07:17 AM EDT     Sunrise
Fri -- 07:53 AM EDT     Moonrise
Fri -- 11:42 AM EDT     0.09 feet Low Tide
Fri -- 05:57 PM EDT     2.86 feet High Tide
Fri -- 06:17 PM EDT     Sunset
Fri -- 07:11 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Tide / Current Tables for Salisbury, Maryland (2 miles below) Current
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Fri -- 01:15 AM EDT     0.62 knots Max Flood
Fri -- 04:13 AM EDT     -0.00 knots Slack
Fri -- 07:16 AM EDT     Sunrise
Fri -- 07:36 AM EDT     -0.89 knots Max Ebb
Fri -- 07:53 AM EDT     Moonrise
Fri -- 10:38 AM EDT     0.00 knots Slack
Fri -- 01:30 PM EDT     0.76 knots Max Flood
Fri -- 04:41 PM EDT     -0.00 knots Slack
Fri -- 06:17 PM EDT     Sunset
Fri -- 07:11 PM EDT     Moonset
Fri -- 08:04 PM EDT     -0.95 knots Max Ebb
Fri -- 11:23 PM EDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Weather Map and Satellite Images
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Weather Map
IR Satellite Image from GEOS

GOES Local Image of Mid-Atlantic    EDIT

Wind Forecast for Wakefield, VA (14,3,4,5)
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Ground Weather Radar Station Dover AFB, DE
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weather_mapweather_map weather_map

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The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.