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Marine Weather and Tides Shenandoah Farms, VA Version 3.4

What's New / NOTES 10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome. 10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

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Sunrise 6:57AM

Sunset 4:57PM

Saturday November 17, 2018 5:37 AM EST (10:37 UTC)

Moonrise 2:18PM

Moonset 12:54AM

Illumination 69%

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.

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7 Day Forecast for Marine Location Near Shenandoah Farms, VA

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Area Discussion for - Baltimore, MD/Washington

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Fxus61 klwx 170912 afdlwx area forecast discussion national weather service baltimore md washington dc 412 am est Sat nov 17 2018 Synopsis High pressure over the ohio valley will build over the region this weekend. The high will shift to the north and then migrate offshore Sunday night. An area of low pressure will near the ohio valley on Monday, lifting a warm front through the area. Another area of low pressure will cross the great lakes Monday night, dragging a cold front through the region on Tuesday. High pressure will build back into the region the middle of next week before another cold front crosses the region by Thursday. Near term through tonight Plentiful cloud cover this morning along and to the north and west of the district. This is a result of ample low level moisture being trapped underneath a subsidence inversion measured around 850mb by the 00z iad upper air sounding. This cloud cover acting as a blanket has kept temperatures in the upper 30s to lower 40s, while to the south where skies are clearer, upper 20s to lower 30s are more prevalent. Along and west of the allegheny front, could still see some flurries and or freezing drizzle early this morning as temperatures hover in the lower 30s and better moisture availability given the upslope flow. Further east, not seeing any reductions in visibilities or hints of precipitation with dewpoints in the upper 20s and temperatures in the upper 30s. Clouds will decrease this morning as high pressure builds in from the ohio valley and some drier air works its way into the region. This will be shortlived as clouds will be on the increase again tonight ahead of the next system nearing the ohio valley and WAA commencing aloft. Highs today will range from the middle 40s to lower 50s with overnight lows in the upper 20s to middle 30s. Short term Sunday through Monday night A weak are of low pressure and associated frontal boundary will approach the ohio valley on Sunday, residing just to our west. This will aid in keeping a fair amount of cloud cover around on Sunday with highs very similar to today. The latest guidance keeps moisture at bay until late Sunday night, and we have kept the highest precip chances along the allegheny front and near the mason dixon line Sunday night, but remains in the chance category. The colder locales could see some snowflakes mix in with any rain showers, however moisture will remain very limited. Lows Sunday night in the 30s to near 40 degrees in cities. The aforementioned area of low pressure will lift a warm frontal boundary into our area on Monday, allowing temperatures to warm to near seasonable levels, upper 40s to the north and upper 50s to the south. This boundary will linger near the mason dixon on Monday, with the best odds at rain showers remaining west of the blue ridge. Better chances at precipitation further east will exists Monday night as the broad area of low pressure crosses the area. Moisture will again be limited and temperatures aloft favor the liquid variety east of the blue ridge, with a rain snow mix possible along and west of there. Long term Tuesday through Friday The long term is relatively quiet. Cold front will be pushing southeast of the region on Tuesday, with upslope snow showers along the alleghany front but little if any precip further east. Cooler air behind the front will hold temps below normal. High pressure will briefly build into the region Wednesday, with dry conditions cwa-wide expected. Temps will remain below normal. Another cold front looks to cross the region Wednesday night into Thursday. This front looks starved for moisture so expecting little if any precip with it, even in the favorable upslope regions. Temps will drop even further, with temps struggling to reach the 40s. High pressure from canada then builds directly overhead for Friday. Dry weather with sunshine should allow temps to rebound a bit, but remaining below normal.

Aviation 09z Saturday through Wednesday MVFR CIGS will impact mrb early this morning with conditions improving toVFR by mid morning.VFR conditions forecast for all terminals today tonight as high pressure builds over the terminal with light winds. Clouds will be on the increase again tonight ahead of the next approaching system, but conditions expected to remainVFR with the exception of the potential for MVFR CIGS at mrb.VFR conditions Sunday and Monday at all terminals with precipitation chances increasing Monday night as a weak area of low pressure crosses the area. Vfr are expected through the long term period. Main issues will just be periods of gusty winds with passing cold fronts, which look mostly dry at this point. Marine Sca conditions expected this morning along the main stem of the bay and lower tidal potomac. With high pressure building into the region through Sunday, winds will trend lighter and sub sca beginning this afternoon. Gradient remains weak over the waters Monday and Monday night as weak low pressure approaches from the west. Sca conditions will be possible Tuesday as a cold front departs the region. Winds probably diminish Wednesday. Climate Here are the current rankings for wettest year on record (through november 15th): washington dc area (dca) 1. 61.33 inches (1889) 2. 60.83 inches (2003) 3. 60.09 inches (1878) 4. 58.58 inches (2018) 5. 58.17 inches (1886) weather records for the washington dc area have been kept at what is now ronald reagan washington national airport (dca) since 1945. Precipitation records observed downtown extend the period of record back to 1871. Baltimore md area (bwi) 1. 63.18 inches (2018) 2. 62.66 inches (2003) 3. 62.35 inches (1889) 4. 58.98 inches (1979) weather records for the baltimore md area have been kept at what is now baltimore-washington international thurgood marshall airport (bwi) since 1950. Precipitation records observed downtown extend the period of record back to 1871. Dulles va area (iad) 1. 65.67 inches (2003) 2. 59.17 inches (2018) 3. 59.05 inches (1972) 4. 58.09 inches (1996) 5. 55.43 inches (1979) weather records have been kept at what is now washington dulles international airport (iad) since 1960. Note: all climate data are considered preliminary until reviewed by the national centers for environmental information (ncei). Lwx watches warnings advisories Dc... None. Md... None. Va... None. Wv... None. Marine... Small craft advisory until 6 am est early this morning for anz532-537-540. Small craft advisory until noon est today for anz533-534-541- 543. Synopsis... Bkf rcm near term... Bkf short term... Bkf long term... Rcm aviation... Bkf rcm marine... Bkf rcm climate... Lwx

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
WASD2 - 8594900 - Washington, DC	54 mi	38 min	NW 4.1 G 8	42°F	47°F		1022.7 hPa (+2.1)
BSLM2 - Chesapeake Bay, MD	71 mi	128 min	NNW 5.1	42°F			1021 hPa	32°F
BLTM2 - 8574680 - Baltimore, MD	78 mi	38 min	NNW 5.1 G 14	43°F	54°F		1021.8 hPa (+2.1)

Wind History for Washington, DC

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Winchester Regional, VA	12 mi	63 min	NW 10	10.00 mi	Overcast	37°F	30°F	75%	1022.7 hPa
Leesburg / Godfrey, VA	24 mi	63 min	NNW 13 G 18	10.00 mi	Mostly Cloudy	41°F	33°F	76%	1022.3 hPa

Wind History from OKV (wind in knots)

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Tide / Current Tables for Chain Bridge, D.C.

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Tide / Current Tables for Chain Bridge, one mile below, D.C.

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Weather Map and Satellite Images

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GOES 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.
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Other links: Northern Pacific     Contential US     Full GOES-East

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Wind Forecast for Baltimore, MD/Washington (5,6,7,8)

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Ground Weather Radar Station Sterling, VA

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Disclaimer: 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 L-36.com. 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 L-36.com 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.