Marine Weather and Tides
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 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.
|Sunrise 6:08AM||Sunset 8:17PM||Wednesday May 23, 2018 8:16 PM EDT (00:16 UTC)||Moonrise 1:38PM||Moonset 1:51AM||Illumination 67%|
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|AMZ256 Coastal Waters From Murrells Inlet To South Santee River Sc Out 20 Nm- 326 Pm Edt Wed May 23 2018 |
Tonight..SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 10 kt late. Seas 2 to 3 ft. Isolated showers and tstms this evening.
Thu..SW winds 10 kt, becoming se in the afternoon. Seas 2 ft. A chance of showers and tstms.
Thu night..E winds 10 kt. Seas 2 ft. A chance of showers and tstms.
Fri..SE winds 10 kt. Seas 2 ft. A chance of showers and tstms.
Fri night..S winds 10 kt. Seas 2 ft. A chance of showers and tstms.
Sat..S winds 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 2 ft, building to 3 ft in the afternoon. A chance of showers and tstms.
Sat night..S winds 10 to 15 kt. Seas 3 ft. A chance of showers and tstms.
Sun..S winds 10 to 15 kt. Seas 3 to 5 ft, building to 4 to 5 ft. A chance of showers and tstms.
Mon..S winds 10 to 15 kt. Seas 5 to 7 ft, subsiding to 4 to 6 ft. Showers and tstms likely. Winds and seas higher in and near tstms.
|AMZ200 326 Pm Edt Wed May 23 2018 |
Synopsis for coastal waters from surf city north carolina to south santee river south carolina out to 20 nautical miles.. A weak cold front will drop south across the area Thursday morning, then will stall across south carolina and dissipate by Friday. Low pressure developing across the gulf of mexico this weekend will bring increasing southerly swell Sunday and Monday, and more widespread showers and Thunderstorms.
7 Day Forecast for Marine Location Near Andrews, SCHourly EDIT Help
Area Discussion for - Wilmington, NC  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus62 kilm 232316|
area forecast discussion
national weather service wilmington nc
716 pm edt Wed may 23 2018
A weak cold front approaching from the north will produce a
greater coverage of showers and thunderstorms this afternoon
and on Thursday. The front will dissipate over the area on
Friday. Low pressure developing across the gulf of mexico will
bring tropical moisture northward and help fuel a higher
probability of showers and thunderstorms with heavy rain across
the eastern carolinas Sunday and into early next week.
Near term through Thursday
As of 300 pm Wednesday... A mid-level disturbance along the savannah
river surrounded by very light steering flow should move very little
over the next 24 hours. Surface high pressure moving across the
great lakes will nudge a surface cold front southward across north
carolina tonight, stalling out across eastern south carolina on
Thursday. This should be the focus for another day of showers and
Today's thunderstorm activity is developing along multiple east-west
oriented convergence boundaries where the airmass is uncapped with
cape of 1500-2500 j kg. Convective organization has remained minimal
due to very weak wind shear: bulk shear across the 0-6 km layer is
only 10-20 kt. Spc's marginal severe weather threat across
northeastern nc and southeastern va is keyed to the stronger shear
and potential for more significant storm cell organization that
Convective activity should diminish this evening, however most
recent runs of the synoptic and rapid update models show convection
lingering through the night along the south end of the higher shear
zone across north carolina, particularly as the cold front eases its
way south overnight and increases low-level convergence. A relative
minimum in convection should occur Thursday morning, with showers
and storms reblossoming Thursday afternoon mainly across south
carolina near the stalled front and pooled low-level moisture.
Forecast pops are as high as 70 percent in the florence vicinity
Lows tonight should range from 68-71. Highs Thursday are forecast to
reach 80 on the beaches to around 84 inland.
Short term Thursday night through Friday night
As of 3 pm Wednesday... Weak upper low across ga Thursday night will
drift northward and weaken further across the far western carolinas
during Friday. In addition, the h5 ridge situated off the coast will
help direct moisture plume back into the carolinas and precipitable
water will increase during the day in response. Expect the best
convective coverage to be across the sc zones initially during
Friday, then in the lbt zone group later in the day. During Friday
the residual foot print of the old front will drift northward and
finally become absorbed in the broader scale flow and awash in the
sea breeze circulation. Favor a blend of mav met numbers through the
period which suggests near climatology high temperatures Friday and
warmer than normal low temperatures each night.
Long term Saturday through Wednesday
As of 3 pm Wednesday... A return to a very wet period appears to
be in order for the extended time frame. A ridge of high
pressure will weaken and the trough will open up across the
eastern half of the united states. The models continue to show a
low developing over the gulf either as a subtropical or
tropical system. For our area this means we should expect to see
increased moisture and the chance of heavy rain. The models
continue to show a surface low developing over the gulf of|
mexico, the 12z ECMWF shows the low moving northward to
louisiana and slowing off the coast on Tuesday. The GFS is near
the florida peninsula and the canadian is in middle. With the
recent rains flood watches may be required Sunday into early
With cloud cover and rain chances high temperatures are expected to
remain in the middle 80s and lows should be range from 68 to 73
through the period.
Aviation 00z Wednesday through Monday
As of 23z... Convection approaching kflo and klbt has been
weakening and will continue until dissipating after sunset. Weak
frontal boundary will drop south overnight and result in a wind
shift early Thursday. Scattered convection is expected to
develop early Thursday afternoon along and south of the front.
Extended outlook... Brief local ifr visibility is possible in
thunderstorms Thursday afternoon. Tropical moisture returning to
the area Sunday and Monday could bring more widespread
thunderstorms with periods of ifr ceilings visibility possible.
Near term through Thursday ...
as of 300 pm Wednesday... High pressure pushing east across the great
lakes will ease a cold front southward through north carolina
tonight. The front should reach the CAPE fear area shortly after
sunrise Thursday, with the boundary slipping south along the grand
strand between 8-11 am. Southwesterly winds ahead of the front
should turn northeasterly behind the front, but with no significant
increase in wind speed expected. Scattered showers and thunderstorms
should end early this evening south of CAPE fear but may continue
overnight north of CAPE fear. Showers storms should develop again
Thursday afternoon, mainly south of CAPE fear. Seas currently around
3 feet should diminish by about a foot with lighter wind
speeds on Thursday.
Short term Thursday night through Friday night ...
as of 3 pm Wednesday... Onshore flow around 10 knots expected Thursday
night with seas less than 3 ft. As high pressure off the southeast u.S.
Becomes better established the flow will veer to a southerly wind by
Friday night. Chance of showers and thunderstorms across the waters,
more-so during Friday and Friday night. Seas 3 ft or less expected
Friday and Friday night.
Long term Saturday through Monday ...
as of 300 pm Wednesday... As high pressure off the coast shifts
eastward and a trough of low pressure exists over the east half
of the united states, the winds will be from the south-
southeast to south-southwest at 10 to 15 knots. This extended
period of fetch will see the seas rising from around 2 to 3 feet
on Saturday to 4 to 6 feet by late in the day on Monday, when a
small craft advisory may be needed.
Ilm watches warnings advisories
Near term... Tra
short term... Srp
long term... Drh crm
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|
|NIWS1 - North Inlet-Winyah Bay Reserve, SC||18 mi||92 min||SW 12||79°F||1017 hPa||67°F|
|MROS1 - 8661070 - Springmaid Pier, SC||31 mi||47 min||1021.2 hPa|
|41029 - Capers Nearshore (CAP 2)||49 mi||69 min||SSW 14 G 18||77°F||77°F||1018.3 hPa|
Wind History for Springmaid Pier, SC(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Georgetown County Airport , SC||15 mi||22 min||SSW 5||10.00 mi||Fair||73°F||73°F||100%||1018.6 hPa|
Wind History from GGE (wind in knots)
|1 day ago||S||S||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||S||S||S||S||S||S||S|
|2 days ago||SW||Calm||Calm||Calm||SW||S||S||Calm||Calm||Calm||Calm||Calm||W||SW||W||S||E||Calm||Calm||S||S||S |
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Mt. Pleasant Plantation |
Click for Map
Wed -- 02:51 AM EDT Moonset
Wed -- 03:23 AM EDT 0.36 feet Low Tide
Wed -- 06:12 AM EDT Sunrise
Wed -- 09:14 AM EDT 2.08 feet High Tide
Wed -- 02:37 PM EDT Moonrise
Wed -- 04:00 PM EDT 0.08 feet Low Tide
Wed -- 08:17 PM EDT Sunset
Wed -- 09:59 PM EDT 2.02 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
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|Black River (south of Dunbar) |
Click for Map
Wed -- 01:28 AM EDT 0.30 feet Low Tide
Wed -- 02:50 AM EDT Moonset
Wed -- 06:11 AM EDT Sunrise
Wed -- 07:05 AM EDT 2.64 feet High Tide
Wed -- 02:05 PM EDT 0.06 feet Low Tide
Wed -- 02:37 PM EDT Moonrise
Wed -- 07:50 PM EDT 2.56 feet High Tide
Wed -- 08:16 PM EDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Weather Map and Satellite Images(on/off)  HelpWeather Map
GOES Local Image of Southeast 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 Wilmington, NC (20,4,5,8)(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.