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Marine Weather and Tides St. James, MD 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 6:29AM

Sunset 7:57PM

Friday August 23, 2019 8:35 PM EDT (00:35 UTC)

Moonrise 11:24PM

Moonset 1:04PM

Illumination 40%

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 St. James, MD

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Area Discussion for - Baltimore, MD/Washington

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Fxus61 klwx 240004 afdlwx area forecast discussion national weather service baltimore md washington dc 804 pm edt Fri aug 23 2019 Synopsis A cold front will move into the southern mid-atlantic and southeast states tonight into Saturday. Strong high pressure will build north of the region tonight and settle over northern new england and atlantic canada through early next week. A tropical cyclone could form over the weekend and move near the southeast coast and out to sea. Near term through Saturday Rain showers have ended across virtually all of the region, though can't completely rule out a pop up shower in central virginia overnight closer to the stalling front (which is hanging out near the north carolina border). Otherwise, gradual clearing is expected tonight with low temperatures in the mid 50s to lower 60s. Patchy fog is possible as well given recent rains, especially in areas where the sky can go mostly clear later tonight. Short term Saturday night through Sunday night High pressure will build north of the region on Saturday with north to northeasterly flow continuing. Aloft an upper level trough will rotate across the region. This will lead to a mix of sun and clouds with more clouds south, but everywhere should at least see a scattered cumulus deck. An isolated shower is also possible, especially near the chesapeake bay where instability will locally be higher due to warmer water temperatures.Highs will range through the mid to upper 70s. Lows Saturday night in the 50s 60s. The ridge will strengthen down the mid-atlantic coastline on Sunday with flow turning more easterly. A mix of Sun and clouds is expected again, although likely more clouds than Saturday. An isolated shower remains possible again as well. Highs in the 70s to near 80f. Lows Sunday night in the 50s 60s. Long term Monday through Friday An upper-level ridge will build in over the region on Monday and Tuesday. Meanwhile, at the surface, high pressure sets up across the northeast, resulting in ridging along east of the appalachains. Generally expecting dry conditions on Monday, but can't rule out some stray showers across the higher elevations, as 850-700mb flow seems to be more easterly. This is in response to a low pressure system riding along the nc coastline throughout the day. Rain chances will be highest along east of the blue ridge, but still not all that high on Monday. Temperatures will remain below average, with highs in the low 80s or so. Monday night into Tuesday, rain chances increase, as low pressure slides by to the southeast, high pressure still to the northeast. This results in easterly low-mid level flow, and likely a higher rain chance. Could even see some embedded thunderstorms, as temperatures will be a bit warmer (highs around the mid 80s) and the atmosphere will be more moist. Additionally, an upper trough will be approaching from the west, lending some upper-level support as well.

A cold front, associated with a low moving from the great lakes into ontario, will push through the region on Wednesday, before possibly stalling overhead into Thursday. Ahead of this front, southerly flow returns, bringing highs into the mid-upper 80s as well as more humidity. Showers and thunderstorms will again be possible on both days, especially on Wednesday. Most of the upper-level support is displaced far to the north, so not seeing an organized severe threat at this time. Aviation 00z Saturday through Wednesday Patchy MVFR or even ifr mainly near cho this evening, tough to say exactly when it will lift but most guidance trends suggest late evening into the overnight.VFR expected everywhere after daybreak Saturday into Sunday, though some patchy lower ceilings are possible Saturday night and again Sunday night due to ensuing onshore flow. Vfr expected for Monday and Tuesday for the majority of the time at all terminals. However, an isolated shower or storm, or lower ceilings due to onshore flow could bring restrictions at times. Eastern terminals may also see some gusty winds (20-25 kts or so) Monday into Tuesday, depending on how offshore low pressure evolves (which is significantly uncertain at this time). Marine Drying tonight as cold front pushes south, but additional northerly flow will create SCA conditions later tonight into Saturday. Additional scas may be needed for northeasterly winds Sunday through Monday with strong gradient between high pressure across new england low pressure near the southeastern us coastline. Uncertainty exists for winds possible intermittent rain during the middle of next week with low pressure moving just off the eastern seaboard. Lwx watches warnings advisories Dc... None. Md... None. Va... None. Wv... None. Marine... Small craft advisory from 3 am to noon edt Saturday for anz531>534-537-539>541-543. Small craft advisory until 10 pm edt this evening for anz534- 537-543. Small craft advisory from 6 pm Saturday to 6 am edt Sunday for anz534-537-543. Synopsis... Mm near term... Mm dhof short term... Mm long term... Cjl aviation... Mm dhof cjl marine... Mm dhof cjl

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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	63 mi	65 min	N 4.1 G 11
BLTM2 - 8574680 - Baltimore, MD	67 mi	65 min	N 8 G 9.9	69°F	83°F		1016.4 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD	71 mi	65 min	NNW 8 G 9.9	69°F			1016.8 hPa

Wind History for Washington, DC

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SW7 G13

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Hagerstown, Washington County Regional Airport, MD	9 mi	42 min	N 0	10.00 mi	Fair	69°F	60°F	73%	1018.7 hPa
Eastern WV Regional Airport/Shepherd Field, WV	17 mi	42 min	SSE 3	10.00 mi	Fair	0°F	0°F	%	1017.9 hPa
Frederick Municipal Airport, MD	24 mi	48 min	N 0	10.00 mi	Overcast	70°F	64°F	83%	1018.6 hPa

Link to 5 minute data for KHGR

Wind History from HGR (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 (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.