Monday, December11, 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 7:08AMSunset 4:43PM Monday December 11, 2017 12:47 AM EST (05:47 UTC) Moonrise 12:40AMMoonset 1:15PM Illumination 47% Phase: Third Quarter Moon; Moon at 22 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- 1231 Am Est Mon Dec 11 2017
.small craft advisory in effect until 7 am est this morning...
.small craft advisory in effect from late tonight through Tuesday afternoon...
Overnight..SW winds 15 kt with gusts to 25 kt. Waves 2 ft.
Mon..NW winds 5 to 10 kt...becoming S late. Gusts up to 20 kt in the morning. Waves 1 to 2 ft.
Mon night..S winds 10 to 15 kt with gusts to 25 kt. Waves 1 to 2 ft.
Tue..SW winds 15 to 20 kt...becoming W in the afternoon. Gusts up to 30 kt. Waves 2 ft.
Tue night..NW winds 20 to 25 kt with gusts to 35 kt. Waves 3 ft.
Wed..W winds 20 to 25 kt with gusts to 30 kt. Waves 3 ft.
Wed night..W winds 15 to 20 kt with gusts to 30 kt...diminishing to 5 to 10 kt with gusts to 20 kt after midnight. Waves 1 to 2 ft.
Thu..W winds 5 to 10 kt. Waves 1 ft.
Fri..NW winds 10 to 15 kt. Waves 1 to 2 ft...building to 3 ft. A chance of rain or snow showers through the day.
ANZ500 1231 Am Est Mon Dec 11 2017
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will build toward the waters through Monday. A frontal system will cross Monday night into Tuesday. Another low pressure system will move through the area Thursday. Small craft advisories may be required Monday night, and gale warnings are likely Tuesday into Wednesday.

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 110255
area forecast discussion
national weather service wakefield va
955 pm est Sun dec 10 2017

High pressure builds over the gulf coast region through Monday
night, as low pressure moves through the northern tier of the
nation. A more prominent low pressure system will move from the
great lakes into new england Tuesday through Tuesday night,
pushing a strong cold front through the local area. Expect markedly
colder temperatures for Tuesday night and Wednesday.

Near term through Monday
The current surface analysis indicates a large area of high
pressure (~1030 mb)centered from south texas to the gulf coast
states. Low pressure genly prevails north of the eastern great
lakes. A shortwave aloft is diving ese from the midwest and is
bringing mainly mid level clouds to the northern 1 2 of the cwa.

These clouds and some low level mixing (albeit weak) will tend
to keep tonight's lows from being as cold as they otherwise
would be if sfc high pressure were centered over the area.

Partly-mostly cloudy north and partly cloudy to mostly clear
south. Still did undercut MOS by a few degrees in snow covered
areas, with lows mainly ranging from the mid 20s to lower 30s.

Skies again turn mainly sunny behind the departing shortwave for
mon and it will become a little milder with highs into the mid-
upper 40s most areas (lower 50s se).

Short term Monday night through Wednesday
Partly to mostly cloudy Mon night and with a southerly flow,
should be a little warmer with lows 30-35 f. Enough SW flow on
tue for highs into the mid-upper 50s SE to the upper 40s nw.

Turning blustery and dry late in the day from NW to se.

Front pushes SE of the local area Tuesday evening into
Wednesday morning. Temperatures tumble into the 20s 30s Tuesday
night, with early morning lows in the teens NW to 20s elsewhere
Wednesday morning. Brisk NW winds will quickly knock wind chills
down into the 10-20 f range Wed morning. Even with mainly sunny
skies wed, highs will struggle to get above the lower 30s N and
mid 30s s... With wind chills remaining in the 20s or colder.

Long term Wednesday night through Sunday
A progressive wnw flow pattern is expected late this
week through next weekend featuring a series of NRN stream moisture-
starved clipper systems. The first wave pushes through during the
Wednesday night Thursday timeframe. The 10 12z ECMWF is about 12hrs
quicker than the gfs, but regardless pops are less than 15% with
limited moisture and downslope flow. Another wave quickly follows
Friday. The GFS is more NRN stream dominated while the ECMWF pushes
a SRN stream wave off the southeast coast. Again, there is little
support for pcpn locally, so forecast pops are less than 15%.

Shortwave ridging prevails Saturday with another quick moving trough
pushing through the region Sunday. High temperatures Thursday-
Saturday will generally be in the 40s to around 50f se, then low mid
50s by Sunday as the aforementioned trough will provide mixing with
limited caa. Low temperatures will primarily be in the 20s for much
of the area to low 30s SE later this week, and then rise to the
upper 20s mid 30s (upper 30s around 40f far se) by the weekend.

Aviation 03z Monday through Friday
Vfr conditions expected through the TAF period. A few mid and
high level clouds may transit the area quickly during the
overnight. Winds will be 10 kt or less from the sw-w tonight and
Monday. ExpectVFR conditions to prevail for the most part
through the week, though winds are expected to become strong and
gusty later Tue and Tue night into Wed with the passage of a
strong cold front.

Ended the SCA hazards over the ocean with this forecast package as
seas have dropped below 5 ft. Sfc high pressure builds over the se
states tonight, and with a slight increase in the pressure gradient,
have hoisted a marginal SCA for the bay for a short period of 15-20
kt winds. Sub-sca conditions then into the day Mon as a clipper
system approaches the oh valley. This system will drag a strong cold
front through the waters on tue, with SCA conditions expected over
much of the marine area lasting from Tue through wed. Low-end gales
are psbl by Tue night, esply over the coastal wtrs.

Akq watches warnings advisories
Md... None.

Nc... None.

Va... None.

Marine... Small craft advisory until 7 am est Monday for anz630>632-634.

Synopsis... Lkb
near term... Ajz lkb
short term... Lkb mam
long term... Ajz
aviation... Mam jef
marine... Mas

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CA2 - 8571892 - Cambridge, MD 15 mi48 min 37°F 45°F1018.8 hPa (-0.5)
BISM2 - 8571421 - Bishops Head, MD 21 mi48 min SW 16 G 20 41°F 38°F1018.5 hPa (-0.6)
COVM2 - 8577018 - Cove Point LNG Pier, MD 30 mi48 min SW 14 G 18 37°F 1018.5 hPa (-0.7)
44062 - Gooses Reef, MD 32 mi38 min SW 16 G 18 39°F 2 ft1018.1 hPa
SLIM2 - 8577330 - Solomons Island, MD 35 mi48 min SW 12 G 16 39°F 48°F1017.7 hPa (-0.7)
OCIM2 - 8570283 - Ocean City Inlet, MD 40 mi48 min W 8.9 G 9.9 38°F 43°F1019.2 hPa (-0.6)
44042 - Potomac, MD 41 mi38 min SW 18 G 19 40°F 2 ft1017.6 hPa
LWSD1 - 8557380 - Lewes, DE 43 mi48 min WSW 6 G 8 35°F 45°F1018.1 hPa (-0.6)
TPLM2 - Thomas Point, MD 44 mi48 min SW 14 G 16 38°F 47°F
PPTM2 - 8578240 - Piney Point, MD 45 mi48 min WSW 13 G 16
CPVM2 47 mi48 min 39°F 28°F
DRSD1 - Delaware Reserve, DE 47 mi78 min SSW 2.9 31°F 1018 hPa30°F
LWTV2 - 8635750 - Lewisetta, VA 48 mi48 min WSW 8.9 G 9.9 38°F 44°F1018.5 hPa (-0.8)
APAM2 - 8575512 - Annapolis, MD 49 mi48 min 37°F 1017.3 hPa (+0.0)

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 mi63 minS 510.00 miOvercast37°F28°F70%1018.3 hPa
Salisbury, Salisbury-Ocean City Wicomico County Regional Airport, MD20 mi54 minS 310.00 miOvercast32°F30°F92%1019 hPa

Wind History from CGE (wind in knots)
Last 24hrCalmW4W4W4W4W5W4W5W6W8
1 day agoE3CalmCalmCalmCalmN36NE4NE4N9N7N14N7N8
2 days agoW3NW6NW6NW5N7N6N10NE3NE4N5N4NW6CalmCalmW4CalmNW3SE3CalmSE4SE6CalmSE5SE4

Tide / Current Tables for Vienna, Nanticoke River, Chesapeake Bay, Maryland
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Mon -- 12:40 AM EST     Moonrise
Mon -- 05:00 AM EST     -0.09 feet Low Tide
Mon -- 07:10 AM EST     Sunrise
Mon -- 11:15 AM EST     2.13 feet High Tide
Mon -- 01:15 PM EST     Moonset
Mon -- 04:42 PM EST     Sunset
Mon -- 05:31 PM EST     0.10 feet Low Tide
Mon -- 11:34 PM EST     2.04 feet High Tide
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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Mon -- 12:39 AM EST     Moonrise
Mon -- 12:51 AM EST     -0.82 knots Max Ebb
Mon -- 04:12 AM EST     0.00 knots Slack
Mon -- 07:02 AM EST     0.57 knots Max Flood
Mon -- 07:09 AM EST     Sunrise
Mon -- 10:11 AM EST     -0.00 knots Slack
Mon -- 01:14 PM EST     Moonset
Mon -- 01:27 PM EST     -0.74 knots Max Ebb
Mon -- 04:42 PM EST     Sunset
Mon -- 04:48 PM EST     0.00 knots Slack
Mon -- 07:34 PM EST     0.44 knots Max Flood
Mon -- 10:26 PM EST     -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 (0,6,7,8)
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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.