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Marine Weather and Tides
Version 3.4 |
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 6:30AM | Sunset 7:57PM | Thursday April 26, 2018 7:25 AM EDT (11:25 UTC) | Moonrise 3:43PM | Moonset 3:47AM | Illumination 85% |  |
Marine Forecasts
EDIT (on/off) Help| AMZ256 Coastal Waters From Murrells Inlet To South Santee River Sc Out 20 Nm- 321 Am Edt Thu Apr 26 2018 Today..NW winds 10 kt or less, becoming E late this morning, then becoming S this afternoon. Seas 2 to 3 ft. Tonight..S winds 10 kt with gusts up to 20 kt. Seas 3 ft, then 2 to 4 ft after midnight. A chance of showers with isolated tstms. Fri..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Fri night..SW winds 10 to 15 kt, becoming W 10 kt after midnight. Seas 2 to 4 ft, subsiding to 2 to 3 ft after midnight. Sat..SW winds 10 kt. Seas 2 ft. Sat night..W winds 10 kt. Seas 2 ft. Sun..NE winds 10 to 15 kt. Seas 3 ft. Mon..NE winds 10 to 15 kt, becoming se 10 kt. Seas 2 to 3 ft. Winds and seas higher in and near tstms. | AMZ200 321 Am Edt Thu Apr 26 2018 Synopsis for coastal waters from surf city north carolina to south santee river south carolina out to 20 nautical miles.. A weak cold fronts will move across the waters this morning. The front will stall and then return northwest later this afternoon. Another cold front will cross the waters on Friday with another front expected Sunday morning. |
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 260722 afdilm area forecast discussion national weather service wilmington nc 322 am edt Thu apr 26 2018 Synopsis Fair conditions today will be followed by showers and a few thunderstorms late tonight and early Friday, as a low pressure system tracks from northern georgia to southern virginia overnight. A stalled front inland, Friday and Saturday, will be kicked offshore by canadian high pressure before sunrise Sunday. This will usher in a drying trend, with slight cooling Sunday and Monday, followed by warming through mid week. Near term through tonight As of 322 am Thursday... Weak cold front moves across the area around daybreak, then stalls after moving off the coast. Surface low developing over the southeast this morning, under a 5h shortwave trough moving through the large scale 5h trough, moves east today, lifting the front back into the area as a warm front this afternoon. Forecast soundings do show some surface based instability during the day today, but weak mid-level capping may prevent any showers until the environment becomes more favorable late in the day and into the evening. Approaching shortwave this evening increases divergence aloft and provides an increase in deep moisture. Mid-level lapse rates steepen considerably late in the day with convection seeming more likely, especially across portions of sc. Timing is the biggest issue. The dynamics associated with the wave arrive very late in the day, at which time diurnal instability will have peaked and be starting to trend down. So while a few strong updrafts cannot be ruled out, mainly across inland sc, the potential for severe weather may be minimalized by the late timing. SPC continues to carry a small area of marginal in the day 1 outlook which covers most of darlington and brushes florence and marlboro counties. However, confidence in this is low. Any convection that is able to persist overnight will be on the weak side and will start winding down during the early morning hours. Varying amounts of cloud cover today, increasing in the late morning and afternoon due to heating, will keep highs confined to the mid to upper 70s. Some areas across inland sc could hit 80 with an extended period of sunshine. Cloud cover coupled with modest boundary layer winds will keep lows well above climo overnight, mid to upper 50s. Short term Friday through Saturday night As of 322 am Thursday... 'devolving' low complex dawn Friday is over north-central nc, lifting north, swept then absorbed with a northern stream low over the great lakes, leaving a dangling, quasi-stationary frontal boundary waffling along the coastal interior. Despite the shallow nature of moisture in vertical profiles, lapse rates associated with the cool pool will prompt moderate cumulus Friday afternoon, possibly isolated showers, albeit low topped, capped by arid wsw aloft. This, diurnally favored around peak heating and in proximity to the surface boundary locality. Saturday setting up to be a nice sunny and warm day, with 80s in the cards, in a weak but impactful, dry, warm sector. FROPA late Saturday night, offshore prior to daybreak Sunday will have a passage without much consequence, aside from winds becoming n-ne and slightly cooler min-t heading into early Sunday, middle 50s. Long term Sunday through Wednesday As of 325 pm Wednesday... Cool high pressure at the surface through the remainder of the weekend. Although temperatures will be cooler than normal Sunday and Monday the weather will be quite tolerable with highs generally in the lower 70s with clear |
skies. A warm-up is expected by mid-week as the high moves off the coast with as return flow develops. Aviation 07z Thursday through Monday As of 06z... Clouds lingering around 6k ft this morning will start to expand in coverage later this morning as heating coupled with colder air aloft increases low level instability. Shortwave moving into the area later in the day may generate some late day evening convection that lingers in the area a little past midnight. Isolated thunder is possible, but potential is low and have not included within the forecast with the latest issuance. Light and variable winds this morning will become southeast with afternoon sea breeze increasing speeds along the coast. Extended outlook... Tempo MVFR tonight through sat. Otherwise vfr. Marine Near term through tonight ... as of 322 am Thursday... Have allowed nc exercise caution headline to expire at 0300 with seas continuing to diminish. Weak cold front moves off the coast this morning then stalls just east of the waters. Front is quick to move back inland as a warm front during the day with light and variable winds in the morning becoming southeast this afternoon. Speeds stay under 10 kt into the evening before weak low approaching from the southwest slowly increases the gradient. Southerly flow increases to 10 to 15 kt overnight, becoming southwest late in the period. Seas 3 to 4 ft this morning will slowly decrease during the day, dropping to 2 to 3 ft by the afternoon. Slight increase in winds overnight will push seas back to 3 to 4 ft late in the period. Short term Friday through Saturday night ... as of 322 am Thursday... This will be a manageable marine period, with Friday the breeziest and bumpiest day, SW winds gusting between 20 and 25 kt in the afternoon inshore, aided by the sea breeze circulation enhancement. Then another gusty period Saturday night, winds veering to wsw-w, gusting to 20 kt ahead of an approaching cold front. The front will bring a wind shift to north before first light of Sunday, 15 kt or less. Seas 3-4 ft this period, so no advisories appear to be needed. Seas will be a mix of SW wind waves every 6 seconds, and SE waves swell every 9 seconds. Isolated marine showers possible Friday but drier Saturday. Long term Sunday through Monday ... as of 325 pm Wednesday... High pressure builds in from the northwest through Sunday night. The high will build over the waters during Monday. Northerly winds in the wake of the front Sunday morning. Variable flow is expected Monday as the high builds overhead. Seas of 3 to 4 ft are possible during Sunday, otherwise they will subside to around 2 ft Monday with a weak pressure gradient overhead. Ilm watches warnings advisories Sc... None. Nc... None. Marine... None. Synopsis... 8 near term... Iii short term... Mjc long term... Srp aviation... Iii |
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 | 101 min | W 1 | 60°F | 1010 hPa | 57°F | ||
| MROS1 - 8661070 - Springmaid Pier, SC | 18 mi | 38 min | 1013.8 hPa | |||||
| SSBN7 | 43 mi | 124 min | 2 ft | |||||
| 41024 - Sunset Nearshore (SUN 2) | 43 mi | 78 min | E 1.9 G 3.9 | 63°F | 63°F | 1010 hPa |
Wind History for Springmaid Pier, SC
(wind in knots) EDIT (on/off) Help| Last 24hr | ||||||||||||||||||||||||
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| 2 days ago |
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 | 31 min | N 0 | 10.00 mi | Partly Cloudy | 55°F | 53°F | 94% | 1010.8 hPa |
| Myrtle Beach Air Force Base, SC | 19 mi | 30 min | N 0 | 10.00 mi | Fair | 57°F | 55°F | 96% | 1011.2 hPa |
Wind History from GGE (wind in knots)
| 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 PM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | |
| Last 24hr | W | W | W | W G15 | W G18 | W G16 | W | W G14 | W | W G16 | NW | W | W | W | Calm | Calm | SW | Calm | SW | W | Calm | Calm | Calm | Calm |
| 1 day ago | SE | SE | S | S | S | S G16 | S G16 | S | S | S | S G14 | S G14 | S | S | SW | S | SW | SW | SW | SW | SW | SW | SW | SW |
| 2 days ago | E G16 | E G22 | E G16 | E G17 | E G18 | E G16 | E G21 | E G25 | E G25 | E G26 | E G26 | E G24 | E G25 | E G27 | SE G30 | SE G28 | SE G28 | E G28 | E G28 | E G33 | SE G9 | NE | SE | Calm |
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 Thu -- 12:01 AM EDT 0.01 feet Low Tide Thu -- 04:47 AM EDT Moonset Thu -- 05:46 AM EDT 4.81 feet High Tide Thu -- 06:33 AM EDT Sunrise Thu -- 12:29 PM EDT -0.14 feet Low Tide Thu -- 04:42 PM EDT Moonrise Thu -- 06:23 PM EDT 4.94 feet High Tide Thu -- 07:55 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 | 0.4 | 1.4 | 2.7 | 3.8 | 4.6 | 4.8 | 4.4 | 3.7 | 2.6 | 1.5 | 0.5 | -0.1 | -0 | 0.7 | 1.9 | 3.2 | 4.3 | 4.9 | 4.8 | 4.3 | 3.3 | 2.2 | 1 |
Tide / Current Tables for Allston Creek, South Carolina
EDIT (on/off) Help One Week of Data| Allston Creek Click for Map Thu -- 12:51 AM EDT 0.01 feet Low Tide Thu -- 04:46 AM EDT Moonset Thu -- 06:22 AM EDT 4.64 feet High Tide Thu -- 06:33 AM EDT Sunrise Thu -- 01:19 PM EDT -0.14 feet Low Tide Thu -- 04:42 PM EDT Moonrise Thu -- 06:59 PM EDT 4.77 feet High Tide Thu -- 07:55 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 |
| 0.2 | 0 | 0.6 | 1.7 | 2.9 | 4 | 4.6 | 4.6 | 4.1 | 3.2 | 2.3 | 1.2 | 0.4 | -0.1 | 0.1 | 1 | 2.2 | 3.4 | 4.4 | 4.8 | 4.5 | 3.8 | 2.9 | 1.8 |
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 (7,2,3,4)
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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. |