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Marine Weather and Tides Boswell's Corner, 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 6:56AM

Sunset 5:50PM

Sunday February 17, 2019 8:41 PM EST (01:41 UTC)

Moonrise 3:36PM

Moonset 5:28AM

Illumination 98%

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 Boswell's Corner, VA

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Area Discussion for - Baltimore, MD/Washington

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Fxus61 klwx 180057 afdlwx area forecast discussion national weather service baltimore md washington dc 757 pm est Sun feb 17 2019 Synopsis Low pressure will pass through the area tonight. High pressure will return for Monday through Tuesday. Stronger low pressure will track through the midwest into the great lakes Wednesday through Wednesday night. Coastal low pressure will develop along the mid-atlantic coast Wednesday before moving off to our northeast Wednesday night. Both lows will impact the area during this time. High pressure will briefly return late week, but another low may impact the area for next weekend. Near term through Monday Widespread light to at times moderate precipitation has enveloped the area. Most reports of ice (freezing rain, mixed with sleet at times) have been confined to northern maryland and elevations between 1000 and 3000 feet near and west of the blue ridge. Surface temperatures are hovering around freezing in southeastern montgomery and southeastern howard counties, so expanded the advisory to include these areas until midnight (though impacts should be limited). Low pressure is tracking into the ohio valley, and it will be continue to move northeast approaching our area through this evening before passing through overnight. Warmer air will gradually move in for most areas overnight. However, cold air may remain trapped for much of the overnight hours with temperatures hovering around freezing across the eastern panhandle of west virginia, northern maryland and extreme northern virginia. Rain will end from northwest to southeast late during the overnight as the low moves offshore, but pockets of freezing rain may persist across northern maryland. Short term Monday night through Tuesday night Low pressure will intensify as it rapidly moves off to the northeast Monday. Any leftover showers near and east of 95 early Monday morning will quickly dissipate. High pressure will approach from the great lakes, and the gradient between the departing low and the approaching high will be strong enough for gusty winds. Frequent gusts around 25 to 35 mph are expected, and there may be some gusts around 40 to 45 mph, especially during the late morning and afternoon hours across northern and central areas (including washington and baltimore). The cold advection will be offset by sunshine and a downsloping wind Monday, so MAX temps are expected to be in the 40s for most areas west of the blue ridge mountains, to near 50 in washington and baltimore, to the middle 50s in central virginia. High pressure will move overhead Monday night through Tuesday, bringing dry but seasonably chilly conditions. A deep upper- level trough over the rockies will slide east Tuesday night and this will cause low pressure to develop over the central conus. An anomalously high subtropical ridge will remain over florida during this time. At the same time, canadian high pressure will be entrenched to our north. Warm and moist air associated with the gulf of mexico will begin to overrun the low-level cold air in place that is associated with the high. The significant change in air masses between the subtropical air over the deep south and the canadian air mass in place to start will cause an enhanced baroclinic zone, and this can be seen by strong frontogenetical forcing at the mid-levels by most guidance. What all this means is that confidence is increasing on the potential for a moderate to heavy band of precipitation that overspreads the area late Tuesday night. The main p-type appears that it will be snow due to the low-level cold air in place. Long term Wednesday through Sunday A broad area of low pressure will continue to bring moisture over our area on Wednesday. There will be cold air at the lower levels and warm air advection will be on the increase under southerly flow at 850mb. Sounding suggests that a some areas may be starting as snow then transitioning to a wintry mix, and areas along and east of i-95 may transition to all rain. Wintry mix will continue over areas west of the blue ridge into Wednesday night. Moderate to heavy snow is possible Wednesday morning midday due to strong forcing from a strong baroclinic zone nearby. Also, significant ice is possible from freezing rain. Details remain uncertain at this time. A transition to all rain is expected by Thursday morning with warmer air over us as low pressure moves across our area and off the coast. A front will linger to our south near our region as waves of low pressure track through it. Additional precipitation is possible into Friday but some guidance

disagrees on how far north the precipitation will reach... If it will reach or not our cwa. Temperatures will be marginal and rain or snow is possible during the night, mainly over the northern part of our cwa. Another broad area of low pressure may affect our area during the weekend and with temperatures above normal, rain is expected for now. Aviation 01z Monday through Friday Lower CIGS taking a touch longer to develop than forecast (for MVFR), but ifr conditions are expected to develop quickly by late evening. Fzra pl at kmrb where temperatures may drop close to freezing for a period tonight, causing rain to freeze on some surfaces. Low pressure will move away from the terminals Monday and gusty northwest winds are expected late Monday morning through Monday afternoon. Gusts around 30 to 35 knots are expected. High pressure will settle overhead Monday night through Tuesday. Low pressure over the central CONUS will likely impact the terminals overnight Tuesday. A band of moderate to heavy snow is possible late Tuesday night. SubVFR conditions expected Wednesday into Friday with low pressure and fronts affecting our area. A wintry mix is possible Wednesday, changing to rain late afternoon into the night. Precip will be possible on Thursday and Friday as well with rain or snow possible on Thursday night. Marine Low pressure will pass through the waters tonight. The gradient should remain light enough for winds to remain below sca criteria. However, winds will strengthen Monday as the low moves away from the area and high pressure approaches from the great lakes. A deep mixing layer and winds around 35 knots at the top of the mixing layer suggests that gale-force gusts will occur. A gale warning is in effect for the northern chesapeake bay and upper tidal potomac river where the gradient will be strongest and winds at the top of the mixing layer are also expected to be strongest. A small craft advisory remains in effect for the rest of the waters for gusts around 25 to 30 knots. A small craft advisory will likely be needed for the waters Monday night, and possibly into Tuesday as high pressure gradually builds overhead. The high should remain close enough for winds to remain below SCA criteria Tuesday night. Small craft advisory may be needed on Wednesday as low pressure moves across our area. Wintry mix possible changing to rain late on Wednesday. Additional rain may be possible on Thursday and Friday but winds may remain below SCA criteria. Lwx watches warnings advisories Dc... None. Md... Winter weather advisory until 1 am est Monday for mdz501-502. Winter weather advisory until 3 am est Monday for mdz003>006- 503-505-507. Winter weather advisory until midnight est tonight for mdz504- 506. Va... Winter weather advisory until 1 am est Monday for vaz027-029. Winter weather advisory until 3 am est Monday for vaz028-030- 031-505. Winter weather advisory until midnight est tonight for vaz025- 026-503-504. Wv... Winter weather advisory until 1 am est Monday for wvz050-055- 501>504. Winter weather advisory until 3 am est Monday for wvz051>053. Winter weather advisory until midnight est tonight for wvz505- 506. Marine... Gale warning from 10 am to 6 pm est Monday for anz530>532-535- 538>540. Small craft advisory from 10 am to 6 pm est Monday for anz533- 534-536-537-541>543. Synopsis... Bjl near term... Bjl dhof short term... Bjl long term... Imr aviation... Bjl imr dhof marine... Bjl imr

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
NCDV2	28 mi	59 min	SSE 6 G 6	37°F	41°F		1014.9 hPa
WASD2 - 8594900 - Washington, DC	33 mi	59 min	SE 5.1 G 11	36°F	41°F		1014.4 hPa
BSLM2 - Chesapeake Bay, MD	44 mi	131 min	ESE 4.1	35°F			1016 hPa	29°F

Wind History for Washington, DC

(wind in knots)    EDIT      (on/off)   Help

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N5 G10

N6 G11

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NE2 G8

NE2 G5

N3 G7

NE4 G8

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E4 G7

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S4 G8

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NW8 G17

NW9 G14

NW6 G14

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Quantico Marine Corps Airfield - Turner Field, VA	10 mi	45 min	S 13	10.00 mi	Rain	37°F	34°F	89%	1014.4 hPa
Stafford, Stafford Regional Airport, VA	10 mi	66 min	SSE 6	5.00 mi	Rain	37°F	36°F	100%	1015.9 hPa
Manassas, Manassas Regional Airport/Harry P. Davis Field, VA	13 mi	45 min	S 5	10.00 mi	Overcast	34°F	32°F	92%	1015.2 hPa
Warrenton-Fauquier Airport, VA	13 mi	66 min	S 5	7.00 mi	Light Rain	36°F	31°F	85%	1013.9 hPa
Fredericksburg, Shannon Airport, VA	19 mi	66 min	SSE 4	5.00 mi	Rain	37°F	35°F	94%	1014.9 hPa
Culpeper Regional Airport, VA	20 mi	66 min	SSE 3	7.00 mi	Unknown Precip	36°F	33°F	89%	1013.9 hPa
Fort Belvoir, VA	21 mi	45 min	S 4	10.00 mi	Light Rain	36°F	30°F	80%	1014.9 hPa

Wind History from NYG (wind in knots)

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Tide / Current Tables for Aquia Creek, Virginia

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Tide / Current Tables for Aquia Creek, Virginia (2)

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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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East

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Wind Forecast for Baltimore, MD/Washington (20,4,5,8)

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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.