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 7:11AM||Sunset 7:19PM||Sunday March 18, 2018 1:29 PM EDT (17:29 UTC)||Moonrise 7:04AM||Moonset 7:33PM||Illumination 4%|
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|ANZ542 Patuxent River To Broomes Island Md- 1031 Am Edt Sun Mar 18 2018 |
Rest of today..NW winds 5 kt. Waves less than 1 ft.
Tonight..SW winds 5 kt. Waves less than 1 ft.
Mon..NE winds 5 kt. Waves less than 1 ft. A chance of rain.
Mon night..E winds 5 to 10 kt. Gusts up to 20 kt after midnight. Waves 1 ft. Rain.
Tue..NE winds 15 kt with gusts to 25 kt. Waves 1 ft. Rain.
Tue night..NE winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft. Snow likely or a chance of rain.
Wed..N winds 10 to 15 kt. Waves 1 ft. Snow likely through the day. Showers likely through the night. Snow showers likely in the evening.
Thu..NW winds 5 to 10 kt. Waves 1 ft.
|ANZ500 1031 Am Edt Sun Mar 18 2018 |
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will build over the waters through tonight. Low pressure will pass through the tennessee valley on Monday, with another coastal low developing off the mid-atlantic coast Monday night into Tuesday. A second coastal low may develop Tuesday night into Wednesday before high pressure finally begins to build in again toward the end of the week. A small craft advisory will likely be needed for the waters Monday night through Wednesday. A gale warning may be needed for portions of the waters Tuesday.
7 Day Forecast for Marine Location Near Lexington Park, MDHourly EDIT Help
Area Discussion for - Baltimore, MD/Washington  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus61 klwx 181408|
area forecast discussion
national weather service baltimore md washington dc
1008 am edt Sun mar 18 2018
High pressure will build overhead through tonight. Low pressure
will pass through the tennessee valley on Monday, with another
coastal low developing off the mid- atlantic coast Tuesday. A
third low pressure system will follow the coastal low and pass
our region to the south Wednesday. High pressure will return for
late next week.
Near term through tonight
High pressure will build overhead through tonight, bringing dry
conditions. Plenty of sunshine is expected the remainder of the
day to allow our high temperatures to rise nearly 10 degrees
warmer than our high temperature on Saturday. High temperatures
will be in the upper 50s across most locations with lower 60s
in central virginia. Seasonably chilly conditions are expected
tonight. Clouds will increase toward morning well ahead of low
pressure over the central conus.
Short term Monday through Tuesday night
No big changes to the forecast regarding the low pressure system
Monday night through Tuesday night. Models are still showing a
transfer of energy to the east coast Monday night into Tuesday
after the low moves across the tennessee valley Monday and
reaches the appalachian front. The newly-formed coastal low will
move well offshore by Tuesday afternoon. Another coastal low
will emerge off the mid- atlantic coast Tuesday night as
additional upper level energy moves in behind the departing
first coastal low.
For Monday through Tuesday: a confluence zone around upper-
level low pressure over the canadian maritimes and ridging over
the north-central CONUS will pump high pressure to our north
over new england. This should cause the primary low to transfer
its energy to the coastal low south of our latitude... Putting
our area on the cold side of the storm. However... It is the
middle of march so there will be issues with warmer air near the
surface. Latest guidance is in good agreement that the canadian
airmass will remain to our north and you can see that in the
surface theta-e profiles. This means that an easterly flow will
allow for relatively warm conditions Monday with MAX temps well
into the 40s and perhaps even 50s for some areas. Clouds will
increase Monday and light precipitation may move into the area
from warm advection well ahead of the approaching low.
However... The p-type is expected to be rain with the relatively
warm boundary layer in place.
The low will pass by to the south Monday night and emerge as a
coastal low by Tuesday morning near the north carolina coast. As
the low is passing by to the south, colder air will get drawn in
from the north from an isallobaric wind associated with rapidly
falling pressures to the south. Precipitation will increase in
coverage Monday evening and widespread precipitation is expected
overnight Monday into Tuesday morning. The colder air will
cause rain to mix with and change to snow across much of the
area. The details of the forecast will be dependent on how
quickly the rain can change to snow before the heaviest
precipitation moves out Tuesday morning. The farther north and
west you go the better the chance you have for this to occur,
also higher elevations will change over much quicker without the
warm boundary layer in place. The most significant snow
accumulations are expected across northern maryland and for
locations near west of the blue ridge and catoctin mountains.
For the metro areas... At this point it appears more likely that
the warm boundary layer will hold on for a while before changing
over to snow... Thus cutting down on accumulations.
Uncertainty is high due to the many factors that will contribute
to the forecast such as where the banding precipitation sets
up, exactly how quickly the cold air can move in, and how strong
is the low as it passes by to the south. Those uncertainties
along with a fairly deep warm boundary layer precluded any
headlines for this update, but that will have to be considered
for later today especially over the higher elevations.
The low will move well offshore later Tuesday morning and
Tuesday afternoon. However... Another shortwave in the southern
stream of the jet will be fast on its heels. This will cause
low pressure to develop to our south later Tuesday and another
coastal low will likely develop Tuesday night. A lull in the
precipitation is most likely later Tuesday in between these
systems. Will continue with the chance for light snow (or
rain snow mixed) but little if any accumulation is expected
Tuesday afternoon due to the high Sun angle this time of year
and the light precipitation rates. In fact... There is a chance
that it turns out mainly dry.
Precipitation will fill in as the coastal low develops Tuesday
night. Guidance still diverges on how strong the low will be and
consequently how much precipitation fills in. It does appears
that the best chance for precipitation will be across the west
and south... Closer to the track of the low. Thermal profiles
will be colder due to northerly winds and this will cause the
p-type to be snow for most areas. Accumulating snow is possible.
Long term Wednesday through Saturday
Behind the exiting low pressure system on Tuesday, another area
of low pressure is progged to develop off the carolina coast
late Tuesday night, likely residing off the nc va coast by
Wednesday morning. As this low strengthens, low pressure to our
southwest over the appalachians will weaken as energy transfers
off the coast. This will result in precipitation across much of
the area during at least the first half of Wednesday before
waning in the afternoon evening as the coastal low pulls away to
the east northeast. Sufficient cold air at the surface and
aloft looks to be in place early Wednesday on the heels of
northerly breezes, favoring snow as the primary ptype during the
morning hours. Boundary layer warming is likely to occur as the
day progresses considering it is mid to late march, which would
favor more of a rain snow mix by the afternoon hours, at least
for locations south and east of the district. Precipitation
tapers off Wednesday night with an upslope component remaining
over our western mountains as the trough axis aloft starts to
pivot east of the area and off the coast.
Breezy conditions expected as the low strengthens and moves off to
our northeast, resulting in a tightened pressure gradient over the
region as canadian high pressure builds southeastward from the
great lakes region. Dry conditions are forecast to win out
Thursday and Friday with high pressure taking control, as well
as moderating yet continued below normal temperatures. Highs
will hold mostly in the 40s, approaching the 50 degree mark on
Friday south and east of the metros. Lows will fall in to the
20s to near the freezing mark.
Low pressure moving eastward from the central u.S. Will near our
region Saturday, but some timing differences remain between
global guidance. There is agreement in our CWA remaining very
much in the warm sector with strong WAA under southerly flow out
ahead of the system, which favors precipitation of the liquid
variety. Highs will range from the upper 40s to lower 50s.
Aviation 14z Sunday through Thursday
High pressure will build over the terminals through tonight.VFR
conditions are expected. Low pressure will pass through the
tennessee valley Monday and it will emerge as a coastal low off
the mid-atlantic Monday night into Tuesday. Precipitation will
overspread the area later Monday into Monday night mainly as
rain. Rain will mix with and possibly change to snow by Tuesday
morning. Accumulating snow is likely across kmrb and possible
across the terminals in the washington and baltimore metro
areas. Subvfr conditions are likely during this time.
There may be a lull in the precipitation later Tuesday but
subvfr CIGS are still possible. Snow may return Tuesday night
but confidence is low at this time.
MVFR ifr conditions expected during the day on Wednesday as low
pressure strengthens off the coast and precipitation continues
across the terminals. Snow is the favorable ptype Wednesday
morning, with a transition to rain snow possible for dca cho,
while northern and western terminals could see less
precipitation but remain colder, favoring light snow. Improving
flying conditions expected Wednesday afternoon evening as
precipitation wanes and low pressure moves off to the east
northeast. High pressure will build toward the region on
Thursday with gusty north northwest winds and prevailingVFR
High pressure will build over the terminals through tonight. Low
pressure will move through the tennessee valley Monday and it will
transfer its energy to a coastal low Monday night into Tuesday.
Winds will increase Monday night into Tuesday and a small craft
advisory will likely be needed. Gale force winds are possible
across the middle portion of the maryland chesapeake bay and the
lower tidal potomac river Tuesday. Another coastal low may
develop Tuesday night and SCA conditions are likely.
Sca conditions likely Wednesday through Thursday as low pressure
strengthens off the coast and high pressure builds southeastward
toward the area, delivering a strong pressure gradient over the
waters. Winds will favor a north northwest trajectory during this
period, gusting upwards of 20 knot.
Lwx watches warnings advisories
Marine... Small craft advisory until noon edt today for anz530>534-
near term... Klw
short term... Klw
long term... Bkf
aviation... Bkf klw
marine... Bkf klw
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|
|SLIM2 - 8577330 - Solomons Island, MD||4 mi||41 min||SE 2.9 G 8||43°F||42°F||1015.7 hPa|
|PPTM2 - 8578240 - Piney Point, MD||10 mi||41 min||NW 8.9 G 8.9|
|COVM2 - 8577018 - Cove Point LNG Pier, MD||10 mi||41 min||NNE 7 G 8||40°F||1016.8 hPa|
|LWTV2 - 8635750 - Lewisetta, VA||19 mi||41 min||N 4.1 G 6||45°F||42°F||1016.4 hPa|
|44062 - Gooses Reef, MD||20 mi||29 min||E 7.8 G 7.8||41°F||1016.6 hPa (+0.0)|
|BISM2 - 8571421 - Bishops Head, MD||23 mi||41 min||WNW 14 G 16||42°F||44°F||1016.3 hPa|
|CA2 - 8571892 - Cambridge, MD||30 mi||41 min||46°F||43°F||1016.6 hPa|
|NCDV2||31 mi||41 min||WNW 2.9 G 8.9||49°F||43°F||1015.5 hPa|
|BSLM2 - Chesapeake Bay, MD||38 mi||119 min||N 5.1||45°F||1016 hPa||20°F|
|TPLM2 - Thomas Point, MD||43 mi||29 min||E 6 G 7||42°F||41°F|
|APAM2 - 8575512 - Annapolis, MD||49 mi||41 min||47°F||1015 hPa|
Wind History for Solomons Island, MD(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Patuxent River, Naval Air Station, MD||3 mi||97 min||NNE 10||10.00 mi||Fair||45°F||26°F||48%||1016.2 hPa|
|St Marys County Airport, MD||6 mi||52 min||NW 6||10.00 mi||Fair||48°F||19°F||32%||1016.3 hPa|
|St. Inigoes, Webster Field, Naval Electronic Systems Engineering Activity, MD||9 mi||36 min||SW 9||10.00 mi||Light Rain||48°F||25°F||41%||1016 hPa|
Wind History from NHK (wind in knots)
|1 day ago||NW||NW|
|2 days ago||W|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Solomons Island |
Click for Map
Sun -- 03:28 AM EDT 1.32 feet High Tide
Sun -- 07:12 AM EDT Sunrise
Sun -- 08:03 AM EDT Moonrise
Sun -- 09:56 AM EDT -0.03 feet Low Tide
Sun -- 03:49 PM EDT 1.22 feet High Tide
Sun -- 07:15 PM EDT Sunset
Sun -- 08:33 PM EDT Moonset
Sun -- 10:03 PM EDT -0.02 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Point Patience |
Click for MapFlood direction 315° true
Ebb direction 145° true
Sun -- 12:42 AM EDT 0.51 knots Max Flood
Sun -- 03:15 AM EDT -0.00 knots Slack
Sun -- 07:03 AM EDT -0.83 knots Max Ebb
Sun -- 07:12 AM EDT Sunrise
Sun -- 08:04 AM EDT Moonrise
Sun -- 11:04 AM EDT 0.00 knots Slack
Sun -- 12:59 PM EDT 0.47 knots Max Flood
Sun -- 03:26 PM EDT -0.00 knots Slack
Sun -- 07:16 PM EDT Sunset
Sun -- 07:16 PM EDT -0.82 knots Max Ebb
Sun -- 08:33 PM EDT Moonset
Sun -- 11:11 PM EDT 0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Weather Map and Satellite Images(on/off)  HelpWeather Map
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
Wind Forecast for Baltimore, MD/Washington (13,3,4,5)(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.