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Marine Weather and Tides
Version 3.4 |
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 6:05AM | Sunset 8:31PM | Sunday June 24, 2018 1:12 AM EDT (05:12 UTC) | Moonrise 4:26PM | Moonset 2:45AM | Illumination 82% |  |
Marine Forecasts
EDIT (on/off) Help| AMZ256 Coastal Waters From Murrells Inlet To South Santee River Sc Out 20 Nm- 921 Pm Edt Sat Jun 23 2018 Overnight..SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. Sun..SW winds 10 to 15 kt, becoming S 15 to 20 kt in the afternoon. Seas 2 to 3 ft, building to 2 to 4 ft in the afternoon. Sun night..SW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Seas 2 to 4 ft. A chance of showers and tstms. Mon..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers and tstms. Mon night..SW winds 10 to 15 kt, diminishing to 10 kt after midnight. Seas 3 ft, subsiding to 2 ft after midnight. Showers and tstms likely. Tue..SE winds 10 kt, becoming E 10 to 15 kt in the afternoon. Seas 2 to 3 ft. Showers and tstms likely. Tue night..E winds 10 to 15 kt. Seas 3 ft. A chance of showers and tstms. Wed..E winds 10 kt, becoming se. Seas 3 ft. A chance of showers and tstms through the day. Thu..S winds 10 kt. Seas 2 to 3 ft. A chance of showers and tstms through the day. Winds and seas higher in and near tstms. | AMZ200 921 Pm Edt Sat Jun 23 2018 Synopsis for coastal waters from surf city north carolina to south santee river south carolina out to 20 nautical miles.. Bermuda high pressure will maintain moderate winds through the weekend. A cold front will drop down into the waters from the north Monday into Tuesday, followed by high pressure for the mid and later portions of next week. |
7 Day Forecast for Marine Location Near Pawleys Island, SC
Hourly EDIT Helplocation: 33.45, -79.11 debug
Area Discussion for - Wilmington, NC
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus62 kilm 240131 afdilm area forecast discussion national weather service wilmington nc 931 pm edt Sat jun 23 2018 Synopsis Hot and humid weather with isolated thunderstorms will continue through Monday. Heat advisories are in effect Sunday, and are possible Monday. A cold front will cross the area late Monday and Tuesday bringing a good chance for showers and thunderstorms and a relief from the heat through Thursday. Temperatures will rebound to above normal again by next Friday but with good chances for showers and thunderstorms. Near term through Sunday As of 930 pm Saturday... Bumped coastal winds up in the CAPE fear area for the next few hours as piers and beaches are still showing gusts over 20 mph. No other significant changes. Discussion from 700 pm follows... a 300 mb jet streak probably helped support a modest line of convection across the CAPE fear region earlier this afternoon. This feature is now off the coast, and a capped marine airmass wasn't able to support the storms anyway. A cluster of showers and storms across eastern sc is also drying up as it approaches the santee river. I've maintained a 20 pop in the georgetown, sc area for the next couple of hours, otherwise i'm forecasting dry weather overnight. A southwesterly low level jet should again keep the hot boundary layer mixed, and similarly to last night lows should range from 75 degrees west of i-95 to around 80 on the beaches. Minor edits have also been made to pops for Sunday, dropping them into the 20-30 percent range given the magnitude of dry air aloft anticipated to move across the area. -tra discussion from 300 pm follows... an MCV should drive convection across eastern georgia and southern south carolina through mid eve. Ongoing convection has been fairly shallow owing largely to the amount of dry air in the mid levels, but a few strong thunderstorms are still possible late this afternoon across our fa. Will follow the guidance offered by the high resolution models in keeping the convection mainly isolated with an emphasis across the CAPE fear area as a mid- level shortwave skirts the area as it moves off the mid-atlantic late this eve. Will also keep the previous trend with the risk for convection dwindling with loss of heating as a mid-level shortwave pivots offshore of the mid- atlantic states. Lows tonight will be in the muggy mid and upper 70s and a few spots will struggle to get as low as 80 degrees. A heat advisory is in effect for Sun with heat index values mainly in the range of 105 to 109 degrees. A few spotty 110 values are possible. Highs will be in the mid and upper 90s and 100 degrees is possible, especially across inland areas. A flat 500 mb ridge will promote subsidence and downslope flow which will keep the seabreeze pinned, allowing even the beaches to reach into the lower and mid 90s. Given the abundance of heat and humidity, expect isolated to perhaps scattered showers and thunderstorms to develop with an emphasis for later afternoon Sun and Sun night as the thunderstorms struggle to overcome the drier air in the mid levels. The piedmont trough and seabreeze should be areas where convection initiates. Short term Sunday night through Monday night As of 300 pm Saturday... Bermuda high and flattening mid-level ridge will hold on into mon. A mid-level shortwave is expected to move across the area Sun night and this trough will help push the piedmont trough to the coast. Stronger upper level support is expected to arrive late Mon and Mon night. A cold front will slowly sag S and should move into the fa Mon night and it is possible it will be as far south as the south santee river during the early morning hours of Tue as a 500 mb trough exits the northeast states. Precipitable water values are forecast to be near or in excess of 2.25 inches Sun night and Mon and instability is expected to be high with mixed layer CAPE values in excess of 3000 j kg. For this reason, we have raised pops to the likely category Mon and Mon night and show pops trending higher Sun night as a cluster of thunderstorms should reach the area during the eve. Pops may need to be boosted with later issuances as timing details are ironed out given the ingredients for a widespread and perhaps significant rainfall event seem to be coming together. Clouds and convection Mon should allow temps to back off as compared to Sun and we are currently forecasting mainly lower and mid 90s. However, given the high dewpoints, at least some of the area may again require a heat advisory. Lows Sun night will be in the mid and upper 70s. Lows Mon night should be slightly lower, mainly mid 70s with perhaps a few lower 70s in rain cooled environment. Long term Tuesday through Saturday As of 300 pm Saturday... Cold front will be meandering to the south early on Tuesday before washing out closer to the gulf coast on Wednesday. This will bring a reprieve from the heat and humidity, but will also feature good shower and TSTM chances, especially Tuesday during fropa. This front will be followed by canadian high pressure bringing much cooler temperatures and lower humidity during |
Wednesday. This will also bring lower convective potential Wednesday, and continuing into Thursday as the high begins to rebuild both at the surface and aloft. Thursday is interesting because the guidance shows a weak surface low trying to develop along a remnant trough just offshore in response to PVA associated with one final shortwave drifting across the se. While low pressure development seems plausible, most of the precip will likely remain offshore and will keep pop low Thursday despite this development. This ridge will expand across the eastern CONUS into next weekend, but the orientation is progged to drive the highest heat to our north, keeping the carolinas warm and humid but unsettled as onshore flow becomes entrenched and pwats climb to well above 2 inches again. Will show temps climbing back to above normal along with above climo precip chances Friday and Saturday. Aviation 00z Sunday through Thursday As of 00z...VFR conditions should continue through at least 16z on Sunday, before isolated showers and t-storms develop during the heat of the day. Coverage should average only 20-30 percent during the 16-23z timeframe. Southwest surface winds could exceed 15 knots along the coast with Sunday afternoon's seabreeze. Extended outlook... MostlyVFR. Mainly afternoon showers and thunderstorms each day with short duration flight category restrictions possible. A cold front will bring a higher probability for showers and thunderstorms Monday into Tuesday. Marine Near term through Sunday ... as of 930 pm Saturday... I've raised an 'exercise caution' headline on the coastal waters from myrtle beach northward through CAPE fear and surf city through 3 am Sunday. This is due to seas responding strongly to the SW 15-20 knot winds. Seas were recently reported up to 5 feet at the cormp 'harbor' buoy just south of southport. The potential for 4-5 foot seas should be with us most of the night, diminishing late as wind speeds diminish slightly. Discussion from 700 pm follows... breezy winds gusting up to 25 knots across the entire marine area should continue overnight away from shore even after the seabreeze dies away. Latest buoy reports agree closely with our forecast sea heights, and no significant changes are being made to the forecast with this early evening update. Discussion from 300 pm follows... nocturnal jetting on the order of 30 kt at 1500 ft will keep winds elevated tonight, mainly 15 to 20 kt. A robust seabreeze circulation and inland trough will allow winds to peak in the 15 to 20 kt range during the afternoon. Seas will be 3 to 4 ft with a few 5 ft seas possible across the outermost waters. Short term Sunday night through Monday night ... as of 300 pm Saturday... Sw winds will dominate Sun and through mon eve with winds then shifting to NE and nne late Mon night and tue morning in the wake of a cold front sagging across the waters from n to s. Wind speeds will be mainly 15 to 20 kt Sun night with nocturnal jetting in place. Wind speeds Mon should be slightly lower, mainly 10 to 15 kt. Wind speeds will lower to 10 kt or less late Mon night. Seas will be 3 to 4 ft Sun night with perhaps some 5 ft seas observed, mainly across the outermost waters. Seas on mon should be closer to 3 ft with 2 to 3 ft seas currently forecast late mon night. Of course winds and seas will be stronger in thunderstorms which will be numerous, especially Mon night. Long term Tuesday through Thursday ... as of 300 pm Saturday... Ne winds will surge behind a cold front Tuesday to 10-15 kts before veering slowly to the east through nightfall. High pressure will ridge into the region Wednesday but maintain its ridge axis to the north. This will keep winds from the e on Wednesday before the high pushes away turning winds to the S at the end of the period. Wind speeds Wed Thu will be around 10 kts. Wave heights will be generally 2-4 ft through the period, with a ne wind wave giving way to a E SE wind wave and swell later in the week. Ilm watches warnings advisories Sc... Heat advisory from 11 am to 8 pm edt Sunday for scz017-023-024- 032-033-039-054>056-058-059. Beach hazards statement from 6 am edt Sunday through Sunday evening for scz054-056. Nc... Heat advisory from 11 am to 8 pm edt Sunday for ncz087-096-099- 105>110. Beach hazards statement from 6 am edt Sunday through Sunday evening for ncz106-108. Marine... None. Synopsis... Jdw near term... Rjd tra short term... Rjd long term... Jdw aviation... Tra |
Weather Reporting Stations
EDIT (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 | 8 mi | 87 min | WSW 8 | 82°F | 1014 hPa | 74°F | ||
| MROS1 - 8661070 - Springmaid Pier, SC | 18 mi | 42 min | 1017.1 hPa | |||||
| SSBN7 | 43 mi | 132 min | 2 ft | |||||
| 41024 - Sunset Nearshore (SUN 2) | 43 mi | 64 min | WSW 14 G 19 | 82°F | 80°F | 1013.1 hPa |
Wind History for Springmaid Pier, SC
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Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Georgetown County Airport , SC | 15 mi | 17 min | SW 5 | 10.00 mi | Fair | 77°F | 77°F | 100% | 1014.2 hPa |
| Myrtle Beach Air Force Base, SC | 19 mi | 16 min | WSW 7 | 10.00 mi | Fair | 81°F | 71°F | 72% | 1013.9 hPa |
Wind History from GGE (wind in knots)
| 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | |
| Last 24hr | SW | SW | SW | SW | SW | Calm | SW | SW | SW | W | SW | W | SW | SW G15 | SW G16 | SW G16 | W | W | W | SW G15 | SW | SW | SW | SW |
| 1 day ago | SW | W | Calm | Calm | SW | SW | W | W | W | W | W | SW | W | SW | SW G15 | S G15 | S G15 | S G15 | S G17 | S | SW | S | SW | SW |
| 2 days ago | Calm | Calm | S | Calm | SW | SW | SW | SW | W | W | W | W | W | NW | W G14 | SW | W | W | W | Calm | Calm | Calm | SW | SW |
Tide / Current Tables for Midway Inlet North, Pawleys Island, South Carolina
EDIT RT Ports Option Weekend mode (on/off) (on/off) Help One Week of Data| Midway Inlet North Click for Map Sun -- 12:12 AM EDT 0.42 feet Low Tide Sun -- 03:44 AM EDT Moonset Sun -- 05:44 AM EDT 4.11 feet High Tide Sun -- 06:07 AM EDT Sunrise Sun -- 12:20 PM EDT -0.03 feet Low Tide Sun -- 05:25 PM EDT Moonrise Sun -- 06:26 PM EDT 4.98 feet High Tide Sun -- 08:29 PM EDT Sunset Tide / Current data from XTide NOT FOR NAVIGATION |
| 12am | 1am | 2am | 3am | 4am | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm | 10pm | 11pm |
| 0.4 | 0.6 | 1.4 | 2.4 | 3.3 | 3.9 | 4.1 | 3.8 | 3.1 | 2.2 | 1.3 | 0.5 | 0 | 0.1 | 0.9 | 2.1 | 3.3 | 4.3 | 4.9 | 4.9 | 4.4 | 3.6 | 2.5 | 1.5 |
Tide / Current Tables for Allston Creek, South Carolina
EDIT (on/off) Help One Week of Data| Allston Creek Click for Map Sun -- 01:02 AM EDT 0.40 feet Low Tide Sun -- 03:44 AM EDT Moonset Sun -- 06:07 AM EDT Sunrise Sun -- 06:20 AM EDT 3.96 feet High Tide Sun -- 01:10 PM EDT -0.03 feet Low Tide Sun -- 05:25 PM EDT Moonrise Sun -- 07:02 PM EDT 4.80 feet High Tide Sun -- 08:29 PM EDT Sunset Tide / Current data from XTide NOT FOR NAVIGATION |
| 12am | 1am | 2am | 3am | 4am | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm | 10pm | 11pm |
| 0.7 | 0.4 | 0.7 | 1.6 | 2.6 | 3.4 | 3.9 | 3.9 | 3.4 | 2.7 | 1.9 | 1 | 0.3 | -0 | 0.2 | 1.2 | 2.3 | 3.5 | 4.4 | 4.8 | 4.6 | 4 | 3.2 | 2.2 |
Weather Map and Satellite Images
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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 (1,6,7,8)
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Ground Weather Radar Station Wilmington, NC
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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. |