Marine Weather and Tides
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.
|Sunrise 7:12AM||Sunset 7:22PM||Monday March 19, 2018 6:40 AM EDT (10:40 UTC)||Moonrise 7:40AM||Moonset 8:39PM||Illumination 7%|
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|ANZ536 Tidal Potomac From Indian Head To Cobb Island- 432 Am Edt Mon Mar 19 2018 |
.small craft advisory in effect from Tuesday morning through Tuesday afternoon...
Rest of the overnight..SW winds 5 kt. Waves less than 1 ft.
Today..E winds 5 to 10 kt. Waves 1 ft.
Tonight..NE winds 5 to 10 kt. Waves 1 ft. Rain.
Tue..NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. Rain.
Tue night..N winds 10 kt with gusts to 20 kt. Waves 1 ft. Snow, sleet and rain likely.
Wed..N winds 10 kt with gusts to 20 kt. Waves 1 ft. Snow.
Wed night..NW winds 5 to 10 kt. Waves 1 ft.
Thu..NW winds 5 to 10 kt. Waves 1 ft.
Fri..NW winds 5 to 10 kt. Waves 1 ft.
|ANZ500 432 Am Edt Mon Mar 19 2018 |
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will push out in to the western atlantic as low pressure passes through the tennessee valley today. Coastal low pressure will emerge and strengthen off the mid atlantic coast on Tuesday. Another low pressure system will develop off the carolina coast Tuesday night, passing south of our region. High pressure will build in from the west Thursday and Friday. A small craft advisory will likely be needed for the waters Tuesday night through Thursday.
7 Day Forecast for Marine Location Near King George, VAHourly EDIT Help
Area Discussion for - Baltimore, MD/Washington  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus61 klwx 190818|
area forecast discussion
national weather service baltimore md washington dc
418 am edt Mon mar 19 2018
High pressure off the mid atlantic coast this morning will push out
in to the western atlantic today as low pressure passes through the
tennessee valley today. Coastal low pressure will emerge and
strengthen off the mid atlantic coast on Tuesday. Another low
pressure system will develop off the carolina coast Tuesday night,
passing south of our region. Canadian high pressure returns for the
latter half of the work week.
Near term through tonight
High pressure situated along the DELMARVA coastline this morning has
kept winds light across the area with mostly clear skies prevailing.
Temperatures are holding in the upper 20s to middle 30s area wide.
Clouds will increase today as high pressure slides eastward and we
see warm air advection taking place aloft, as well as some
isentropic lift, which could result in light rain drizzle across
central va later this morning. Highs today will reach in to the
lower 50s for most, sticking in the 40s in the mountains.
Low pressure will track through the tn valley today and approach our
area this evening. Expect much of the precipitation to hold off
until after midnight for most, with light rain likely across central
va this evening. See no ptype concerns this evening as temperatures
remain in the upper 30s to lower 40s. Do have some concerns with the
potential for a mix of rain snow sleet and perhaps some freezing
rain along our far western zones in WV and western md overnight. No
advisories issued at this time as any snow sleet accumulations look
to remain just below criteria, but if thermal profiles continue to
show freezing rain potential, this is a possibility later today.
Short term Tuesday through Wednesday night
The transition from rain to a wintry mix across the area will
continue southward throughout the day on Tuesday as the low moves
off to our northeast, filtering in additional cold air. There will
be a lull in precipitation Tuesday afternoon and early evening as
the low pulls away from the area and another low pressure area
emerges off the carolina coast overnight Tuesday. As this low moves
northeastward Tuesday night and early Wednesday, low pressure will
reside at the surface and aloft over wv, helping spread snowfall
across much of the area. Confidence is increasing for at least
advisory criteria for portions of the area overnight Tuesday and
early Wednesday, but confidence in warning criteria is not there at
this point. See our winter weather page at weather.Gov lwx winter
for the latest snowfall accumulations.
Low pressure will pull away from the area during the day on
Wednesday, bringing an end to precipitation by the evening.
Temperatures through the period will remain below normal as cold air
advection wins out along with precipitation and ample cloud cover
affecting the region.
Long term Thursday through Sunday
High pressure will be building in from the west on Thursday. There
will still be a little moisture in the northwest flow aloft, so some
cloud cover could linger. It will also be breezy with high
temperatures 10-15 degrees below normal (40s for most areas).
The high will cross the area Friday and Friday night, and
temperatures will remain below normal.
The next low pressure system will be ejecting out of the plains
toward the mid atlantic over the weekend. Although the system is
resolved in most guidance, there is still a wide spread for track
and timing, and thus thermal profiles. Will employ a generic
rain snow forecast at this juncture based on blended model
Aviation 08z Monday through Friday
Vfr conditions will persist through much of the day today at all
terminals. MVFR ifr vis and CIGS expected to overtake the terminals
tonight as low pressure approaches from the south, bringing
precipitation from south to north starting this evening and continue
into the day on Tuesday. A break in precipitation Tuesday afternoon
could provide some improving conditions, but likely remain MVFR.
Another low pressure area poised to bring wintry precipitation to
the terminals Tuesday night and early Wednesday, resulting in
continued MVFR ifr vis and cigs. Winds are expected to be east
southeast today, backing out of the north to northeast tonight,
remaining at 10 knots or less.
Vfr conditions are expected Thursday into Friday as high pressure
builds into the area. Northwest winds may gust greater than 25 kt on
High pressure residing east of our waters today will promote winds
remaining below advisory criteria today. Low pressure will move
south of our area tonight and redevelop off the coast early Tuesday.
This will bring SCA conditions across our waters starting tonight. A
gale warning has been issued for the lower chesapeake as the low
strengthens and passes to our east, delivering a strong pressure
gradient over the waters. Small craft advisories continue through
the day on Tuesday and will likely be required through the day on
Wednesday as another low pressure area approaches the waters from
The region will be in between departing low pressure and high
pressure to the west for Thursday and Friday. Small craft advisory
conditions in northwest flow will be most likely on Thursday, and
could linger into Friday on portions of the waters.
Tides coastal flooding
Two areas of low pressure will pass off the coast Tuesday and
Wednesday, resulting in prolonged onshore flow. Water levels
will be rising during this time, with minor flooding becoming
possible by Wednesday. Exact projections are still uncertain at
this time though.
Lwx watches warnings advisories
Marine... Small craft advisory from midnight tonight to 4 pm edt Tuesday
Small craft advisory from 6 am to 4 pm edt Tuesday for anz530-
Small craft advisory from midnight tonight to 6 am edt Tuesday
Gale warning from 6 am to 4 pm edt Tuesday for anz534-543.
Small craft advisory from 6 pm this evening to 6 am edt
Tuesday for anz534.
near term... Bkf
short term... Bkf
long term... Ads
aviation... Ads bkf
marine... Ads bkf
tides coastal flooding... Ads
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
|Stations||Dist||Age||Wind||Air Temp||Water Temp||Waves||Pressure||DewPt|
|NCDV2||9 mi||41 min||SW 1.9 G 4.1||40°F||44°F||1011.8 hPa (-0.8)|
|PPTM2 - 8578240 - Piney Point, MD||35 mi||41 min||SW 1 G 1.9|
|SLIM2 - 8577330 - Solomons Island, MD||39 mi||41 min||SW 14 G 16||42°F||42°F||1012.3 hPa (-0.9)|
|LWTV2 - 8635750 - Lewisetta, VA||42 mi||41 min||W 2.9 G 4.1||41°F||44°F||1012.9 hPa (-0.6)|
|COVM2 - 8577018 - Cove Point LNG Pier, MD||44 mi||41 min||WSW 17 G 23||42°F||1012.7 hPa (-1.3)|
|WASD2 - 8594900 - Washington, DC||45 mi||41 min||Calm G 1||37°F||43°F||1012.9 hPa (-0.6)|
|BSLM2 - Chesapeake Bay, MD||45 mi||131 min||Calm||29°F||1013 hPa||27°F|
|44062 - Gooses Reef, MD||46 mi||31 min||SSW 7.8 G 7.8||42°F||1013.1 hPa|
Wind History for Piney Point, MD(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Fredericksburg, Shannon Airport, VA||14 mi||46 min||N 0||10.00 mi||Fair||32°F||27°F||84%||1012.5 hPa|
|Stafford, Stafford Regional Airport, VA||18 mi||46 min||N 0||10.00 mi||Fair||31°F||28°F||90%||1013.9 hPa|
|Quantico Marine Corps Airfield - Turner Field, VA||20 mi||45 min||WNW 7||10.00 mi||Fair||33°F||27°F||78%||1013.1 hPa|
Wind History from EZF (wind in knots)
|1 day ago||Calm||Calm||SE||E||S||Calm||Calm||NW||N||W||NW||NW||NW||NW||W||Calm||W||N||N||N||N||N||N||N|
|2 days ago||Calm||Calm||NW|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Hopyard Landing |
Click for Map
Mon -- 02:59 AM EDT 0.07 feet Low Tide
Mon -- 07:13 AM EDT Sunrise
Mon -- 08:38 AM EDT 2.39 feet High Tide
Mon -- 08:39 AM EDT Moonrise
Mon -- 03:34 PM EDT 0.04 feet Low Tide
Mon -- 07:19 PM EDT Sunset
Mon -- 09:07 PM EDT 2.25 feet High Tide
Mon -- 09:39 PM EDT Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Corbins Neck |
Click for Map
Mon -- 03:27 AM EDT 0.11 feet Low Tide
Mon -- 07:14 AM EDT Sunrise
Mon -- 08:39 AM EDT Moonrise
Mon -- 08:42 AM EDT 3.03 feet High Tide
Mon -- 04:02 PM EDT 0.09 feet Low Tide
Mon -- 07:20 PM EDT Sunset
Mon -- 09:11 PM EDT 2.84 feet High Tide
Mon -- 09:40 PM EDT Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Weather Map and Satellite Images(on/off)  HelpWeather Map
GOES Local Image of Mid-Atlantic 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
Wind Forecast for Baltimore, MD/Washington (6,6,7,8)(on/off)  Help
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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 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.