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Marine Weather and Tides Greenbriar, VA Version 3.4

NOTICE 7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports. 6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

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Sunrise 6:24AM

Sunset 8:02PM

Sunday August 18, 2019 5:05 PM EDT (21:05 UTC)

Moonrise 8:56PM

Moonset 8:07AM

Illumination 89%

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 Greenbriar, VA

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Area Discussion for - Baltimore, MD/Washington

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Fxus61 klwx 181915 afdlwx area forecast discussion national weather service baltimore md washington dc 315 pm edt Sun aug 18 2019 Synopsis A weak surface boundary will remain over the area through the middle of the week. Southerly flow will bring hot and humid air into the region during this time. A cold front will sweep through the area during the second half of the week, with high pressure following for next weekend. Near term through Monday As expected, isolated to scattered thunderstorms have developed this afternoon. One in particular got caught and backbuilt over baltimore city, dropping two inches of rain, dime size hail, and gusty winds of at least 30 mph. With little in the way of synoptic forcing, the existing outflow boundaries from ongoing convection, and terrain, will be the primary drivers of convective initiation through the early evening hours. Some of these storms will likely be as robust as the one in baltimore -- perhaps even stronger. Overnight tonight, model guidance shows more fog than this morning but not as much as Saturday morning. Have indicated that in the forecast. Otherwise, the ongoing convection should end with sunset, and guidance has backed off on the idea of overnight showers... For now. We will rinse and repeat this for Monday, most likely with temperatures a degree or two hotter than today. This will put heat index values very close to heat advisory criteria in the eastern half or so of the forecast area. Due to ongoing storms, will pass the advisory decision on to later shifts. There should not be as much in the way of showers and storms on Monday, but isolated activity -- perhaps with strong gusty winds -- is still on the table. Short term Monday night through Tuesday night The only thing likely to hold Tuesday back from the extreme heat will be increased cloud storm coverage in the afternoon, before it has a chance to get as hot or hotter than Monday. A heat advisory could still be required. Things start to change Tuesday as a stronger, deeper shortwave approaches, not to mention a cold front from the northwest. CAPE remains plentiful Tuesday and pw's near 2 inches. Thus, decided it was prudent to insert a mention for severe weather and flooding into the hwo for this day, given the higher potential compared to prior days. The SPC has also placed us in a marginal risk for severe weather Tuesday.

Long term Wednesday through Saturday A surface trof will be in place Wednesday while temperatures remain hot in the middle 90s. A downward trend in convection is indicated by model guidance. Substantial height falls are indicated on Thursday as mid-upper level trof crosses the eastern great lks to northern new england with the GFS being much more amplified with this trof than the ecmwf. Nevertheless, anticipating Thu we'll see decent convective cvrg. Some drying will begin to take place thu night as front crosses the area, but expecting showers to linger into Fri across the southern areas as front will be slow to clear area. Dry conditions are likely for the weekend at least for northern areas, although central va and far southern areas could still see chances of showers prevail as front stalls across southern va. Aviation 19z Sunday through Friday Vfr expected through the valid TAF period except in pop-up showers and storms... Which today seem to be popping up right near the terminals. When those storms occur, lowered visibility and gusty winds are possible. This will repeat Monday afternoon but with less storm coverage expected. Better chance again on Tuesday and Wednesday. Enhanced risk of t-storms Thursday with passage of cold front. Marine Models have backed off on the potential for southerly channeling this evening that would reach small craft advisory gust criteria. But it will remain close and we will monitor. Gusty winds possible in storms over the waters this afternoon and early evening; same story Monday and Tuesday. Otherwise light winds though with high pressure in control after today. Sca conditions possible Wed and Thu as gradient tightens. Smws may be required thu. Lwx watches warnings advisories Dc... None. Md... None. Va... None. Wv... None. Marine... None. Synopsis... Je near term... Je short term... Rcm long term... Lfr aviation... Je lfr marine... Je lfr

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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	20 mi	53 min	SE 6 G 8	91°F	84°F		1014.3 hPa
BSLM2 - Chesapeake Bay, MD	37 mi	155 min	SSE 6	91°F			1015 hPa	75°F
NCDV2	43 mi	59 min	ESE 9.9 G 12	87°F	89°F		1014 hPa
APAM2 - 8575512 - Annapolis, MD	49 mi	47 min		89°F			1014.2 hPa

Wind History for Washington, DC

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

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Washington/Dulles International Airport, DC, VA	6 mi	73 min	SE 6	10.00 mi	Mostly Cloudy	90°F	70°F	52%	1014.5 hPa
Manassas, Manassas Regional Airport/Harry P. Davis Field, VA	13 mi	69 min	SE 7	10.00 mi	Partly Cloudy	94°F	71°F	48%	1014.9 hPa
Fort Belvoir, VA	15 mi	2.2 hrs	ESE 9	10.00 mi	A Few Clouds	96°F	70°F	45%	1015.1 hPa
Leesburg / Godfrey, VA	17 mi	90 min	WSW 8	10.00 mi	Partly Cloudy	97°F	71°F	44%	1015.2 hPa
Washington/Reagan National Airport, DC, VA	19 mi	73 min	ESE 8	10.00 mi	Partly Cloudy	92°F	73°F	54%	1014.7 hPa
Gaithersburg - Montgomery County Airport, MD	23 mi	69 min	SE 11	10.00 mi	Mostly Cloudy	91°F	71°F	52%	1016.4 hPa

Link to 5 minute data for KIAD

Wind History from IAD (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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East

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Wind Forecast for Baltimore, MD/Washington (17,4,5,8)

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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.