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Marine Weather and Tides
Version 3.4 |
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. 5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds. |
| Sunrise 7:03AM | Sunset 7:13PM | Friday September 22, 2017 8:17 PM EDT (00:17 UTC) | Moonrise 8:17AM | Moonset 7:59PM | Illumination 6% |  |
Marine Forecasts
EDIT (on/off) Help| AMZ256 Coastal Waters From Murrells Inlet To South Santee River Sc Out 20 Nm- 341 Pm Edt Fri Sep 22 2017 .small craft advisory for hazardous seas in effect from Saturday morning through late Monday night... Tonight..E winds 10 kt. Seas 3 to 5 ft, building to 4 to 6 ft after midnight. Sat..NE winds 10 kt, becoming E 10 to 15 kt in the afternoon. Seas 4 to 6 ft. Sat night..E winds 10 to 15 kt. Seas 5 to 7 ft. Sun..NE winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Seas 5 to 8 ft, building to 6 to 8 ft in the afternoon. Sun night..NE winds 10 kt, increasing to 10 to 15 kt after midnight. Seas 6 to 8 ft. Mon..NE winds 10 to 15 kt with gusts up to 20 kt. Seas 6 to 8 ft. Mon night..NE winds 10 to 15 kt with gusts up to 20 kt. Seas 6 to 8 ft. Tue..N winds 10 to 15 kt, increasing to 15 to 20 kt. Seas 6 to 8 ft, subsiding to 5 to 7 ft. Wed..N winds 15 to 20 kt, becoming nw 10 to 15 kt. Seas 4 to 6 ft, subsiding to 2 to 4 ft. | AMZ200 341 Pm Edt Fri Sep 22 2017 Synopsis for coastal waters from surf city north carolina to south santee river south carolina out to 20 nautical miles.. The remants of jose will spin nearly stationary off the new england coast the next several days while slowly weakening. Winds and especially seas will increase and build through the weekend into early next week as hurricane maria moves between the east coast of the u.s. And bermuda, producing hazardous marine conditions. |
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 222104 afdilm area forecast discussion national weather service wilmington nc 504 pm edt Fri sep 22 2017 Synopsis Building high pressure aloft from the north will bring dry but warm air across the carolinas this weekend. Strong rip currents and large surf along the beaches, as well as hazardous marine conditions offshore will continue as hurricane maria moves northward through the atlantic waters. The latest forecast puts maria just over 400 miles east of the tip of CAPE fear by mid week next week. Near term through Saturday As of 300 pm Friday... Since convection is struggling through the window of maximum insolation, diurnal cooling with our lowering ball of fire will put the curtail on convection into the late afternoon to early evening, leaving a clear sky tonight as the cumulus dissolves into the evening sky. Under clear skies and decelerating winds, patches of fog can be expected between 4am and 8am. Minimums will settle to 65-68 across most locals and low 70s near the beaches and icw. The surfzone and area beaches will begin to possess a hazard as long period SE swell from distant marie intensifies rip currents, while creating large and powerful breakers near shore. This will pose a threat to surf- waders, and even small children or elderly not in the water but standing by the oceans roar, where wave run-up can be speedy and strong, as wave periods will be on the order of 15 seconds, representing a high translational velocity into the surfzone. It is beyond this period however, namely Sunday, that the surf becomes large. For Saturday 4-7 ft breakers, and a 'high- risk' of rip currents along all beaches. Short term Saturday night through Sunday night As of 300 pm Friday... Although the weather will remain quiet, the seas and surf will not. The main impact this weekend will come from high surf and strong rip currents at the beaches. Otherwise, jose will continue to churn in the northern atlantic and maria will continue its trek northward, while high pressure moves slowly east across the great lakes. The carolinas will basically be under the influence of high pressure in the northeasterly flow between these systems. A weaker gradient flow initially will allow the sea breeze to dominate closer to the coast helping to produce a greater on shore flow Sat eve. The pcp water values will be near 1.3 inches closer to the coast and down near an inch in a drier NE flow Sat eve, but a boundary from jose will shift south overnight Sat into early sun. This will produce some clouds and perhaps a spotty shower over the waters. Otherwise expect mainly clear to partly cloudy skies and overnight lows in the mid 60s most places. The winds will pick up on Sun as gradient tightens with northerly movement of maria which should reach about 500 to 600 miles to the southeast, but coastal carolinas will remain in dry air and subsidence as ridge builds down over the area aloft and we remain on back side of extreme outer periphery of maria. H5 heights will be up near 588 dm with 850 temps up near 16 to 17c. This will help to keep a dry forecast with warm temps up in the mid 80s for Sunday. Models show a some drier air advecting in overnight Sunday with slightly lower dewpoints which may shave a couple of degrees off overnight low, but still expected in the mid 60s. Long term Monday through Friday As of 300 pm Friday... Hurricane maria will be slowly making its way north well off the coast of the carolinas through the first half of the week. Expected impacts will be dangerous surf and an elevated rip current risk from long period (15 sec) swells. This swell energy will translate into breaking waves as high as 10 to 15 feet along the beaches of new hanover and pender counties, and 6 to 10 feet along the beaches of brunswick, horry and georgetown counties into Wednesday. The swell energy should begin to ease late Wednesday, but dangerous surf and an elevated rip current risk will likely continue into Friday. Northeast to north winds will be breezy along the coast, and gust occasionally into the 20-30 mph range by Tuesday-Wednesday. It will be a tough call at this point to determine how much peripheral moisture from maria will affect the area, however it is reasonable to expect for the ilm cwa, that SE nc will have the best chance for precipitation based on the current forecast track of maria. The highest pops, which will still remain less than 30% at this time, will be Tuesday into Wednesday, before the cyclone gets picked up by the westerlies on Thursday as indicated by both the GFS and ecmwf. |
Upper level ridging and subsidence west of the hurricane will likely result in a sharp sky cover gradient and temperatures remaining a few degrees above normal through the week. Aviation 21z Friday through Wednesday As of 18z... Afternoon cumulus of sct-bkn050 will prevail along the coastal interior with vcsh by mid afternoon. Any convection should dissipate after 00z this evening. A light onshore wind will guide the sea breeze front inland, and along this boundary is where a shower or storm will be favored. High pressure over the great lakes will push drier air southwestward today and Saturday.VFR conditions this evening may decrease to MVFR ifr again late tonight in patchy ground fog, manly aft 9z. Extended outlook... MainlyVFR conditions through the period with the exception of possible MVFR ifr conditions due to low clouds and fog each morning, mainly between 9z-12z. Marine Near term through Saturday ... as of 300 pm Friday... Although N through ene winds this period will not be strong, increasing SE swell from maria has prompted a 'hazardous seas' advisory, effective from 6 am Saturday through at least early next week, likely into mid-week, since maria will slow down once offshore of the carolinas. 4-7 foot se waves every 15 seconds will produce turbulence and standing waves in area inlets during the outgoing tides, while increasing the width of the surfzone of tumultuous breakers. No tstms are expected through Saturday over the 0-20 nm waters. Onshore winds can be expected Saturday with high pressure to the north and maria east of the bahamas. Short term Saturday night through Sunday night ... as of 300 pm Friday... High pressure will extend down from the great lakes this weekend as jose continues to spin in the north atlantic and maria treks north from north of the bahamas. A general northeasterly flow will increase heading into Sunday up to 15 to 20 kts in the outer waters, but otherwise winds will be in the 5 to 10 kt range. A very long period swell up to 11 to 15 seconds will continue through the weekend. An increasing northeast shorter period wind swell will combine with this longer period swell to produce an increase in seas from near 6 to 7 ft in outer waters Sat eve up to 10 to 12 ft Sun night into Monday. Expect shoaling and large breaking waves along the length of frying pan shoals. A small craft advisory for hazardous seas mainly due to long period swells will continue through the period. Long term Monday through Wednesday ... as of 300 pm Friday... Long period southeasterly swells will be ongoing Monday, ranging from as high as 8 to 10 feet every 15 seconds in the outer waters (15-20 nm). South of CAPE fear, these are likely to decay to 4 to 6 feet as they approach the coast, but north of CAPE fear, 6 to 8 footers will push in closer. Based on the latest forecast track for maria, northerly winds will peak Tuesday night into Wednesday, with 20 to 25 knots north of CAPE fear. South of CAPE fear, a 15 to 20 knot range can be expected. Expect small craft advisory conditions through the entire period. Tides coastal flooding As of 300 pm Friday... A coastal flood advisory may be needed for downtown wilmington and the lower CAPE fear but confidence is low because of the marginality. Therefor will allow a few more observations to arrive through afternoon, take into account departures before an issuance if any. If a coastal flood advisory is issued, the flooding itself will remain very minor. Ilm watches warnings advisories Sc... High rip current risk from Saturday morning through Saturday evening for scz054-056. Nc... High rip current risk from Saturday morning through Saturday evening for ncz106-108-110. Marine... Small craft advisory for hazardous seas from 6 am Saturday to 6 am edt Tuesday for amz250-252-254-256. Synopsis... near term... Mjc short term... Rgz long term... Crm aviation... Mjc marine... tides coastal flooding... |
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 | 92 min | E 6 | 79°F | 1016 hPa | 73°F | ||
| MROS1 - 8661070 - Springmaid Pier, SC | 18 mi | 47 min | 1015.2 hPa | |||||
| SSBN7 | 43 mi | 137 min | 2 ft | |||||
| 41024 - Sunset Nearshore (SUN 2) | 43 mi | 189 min | SE 5.8 G 7.8 | 79°F | 81°F | 1015.4 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 | 22 min | ENE 3 | 10.00 mi | Fair | 72°F | 71°F | 100% | 1015.9 hPa |
| Myrtle Beach Air Force Base, SC | 19 mi | 21 min | ESE 4 | 10.00 mi | Fair | 77°F | 73°F | 88% | 1016.2 hPa |
Wind History from GGE (wind in knots)
| 9 PM | 10 PM | 11 PM | -12 PM | 1 AM | 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 | |
| Last 24hr | W | E | SE | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | NE | Calm | NE | SE | SE | E | E | E | SE | E | E | E |
| 1 day ago | SW | Calm | Calm | Calm | Calm | Calm | Calm | Calm | SW | Calm | W | SW | W | Calm | W | Calm | Calm | SE | S | S | S | S | N | W |
| 2 days ago | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | W | W | W | W | W | W | W | SW | NW | W | NW | W | S | S | S |
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 Fri -- 04:14 AM EDT 0.18 feet Low Tide Fri -- 07:04 AM EDT Sunrise Fri -- 09:16 AM EDT Moonrise Fri -- 10:09 AM EDT 5.28 feet High Tide Fri -- 04:39 PM EDT 0.36 feet Low Tide Fri -- 07:12 PM EDT Sunset Fri -- 08:58 PM EDT Moonset Fri -- 10:19 PM EDT 4.97 feet High Tide 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 |
| 3.9 | 2.8 | 1.6 | 0.7 | 0.2 | 0.4 | 1.4 | 2.7 | 3.9 | 4.8 | 5.3 | 5.1 | 4.4 | 3.4 | 2.3 | 1.2 | 0.5 | 0.4 | 1.1 | 2.3 | 3.5 | 4.5 | 4.9 | 4.9 |
Tide / Current Tables for Allston Creek, South Carolina
EDIT (on/off) Help One Week of Data| Allston Creek Click for Map Fri -- 05:04 AM EDT 0.17 feet Low Tide Fri -- 07:04 AM EDT Sunrise Fri -- 09:16 AM EDT Moonrise Fri -- 10:45 AM EDT 5.09 feet High Tide Fri -- 05:29 PM EDT 0.34 feet Low Tide Fri -- 07:12 PM EDT Sunset Fri -- 08:58 PM EDT Moonset Fri -- 10:55 PM EDT 4.79 feet High Tide 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 |
| 4.3 | 3.4 | 2.4 | 1.3 | 0.5 | 0.2 | 0.6 | 1.7 | 3 | 4.1 | 4.9 | 5.1 | 4.7 | 4 | 3 | 1.9 | 1 | 0.4 | 0.5 | 1.3 | 2.6 | 3.7 | 4.5 | 4.8 |
Weather Map and Satellite Images
(on/off) HelpWeather Map | IR Satellite Image from GEOS GOES Local Image of Southeast EDIT  |
Wind Forecast for Wilmington, NC (20,4,5,8)
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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. |