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Marine Weather and Tides
Version 3.4 |
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone. 1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17. 1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support. |
| Sunrise 7:00AM | Sunset 7:17PM | Sunday September 19, 2021 10:24 AM EDT (14:24 UTC) | Moonrise 6:00PM | Moonset 4:27AM | Illumination 96% |  |
AMZ254 Coastal Waters From Little River Inlet To Murrells Inlet Sc Out 20 Nm- 935 Am Edt Sun Sep 19 2021
Rest of today..E winds 10 to 15 kt. Seas 2 to 3 ft.
Tonight..E winds 10 to 15 kt. Seas 2 to 3 ft.
Mon..E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. A slight chance of tstms. A slight chance of showers in the morning, then a chance of showers in the afternoon.
Mon night..E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. A chance of showers. A slight chance of tstms in the evening, then a chance of tstms after midnight.
Tue..E winds 10 to 15 kt with gusts up to 20 kt. Seas 4 ft. A chance of tstms. A chance of showers in the morning, then showers likely in the afternoon.
Tue night..SE winds 10 to 15 kt with gusts up to 20 kt. Seas 4 ft. Showers likely with a chance of tstms.
Wed..S winds 10 to 15 kt. Seas 3 to 4 ft. Showers likely with a chance of tstms.
Thu..N winds 10 to 15 kt. Seas 3 to 4 ft. Winds and seas higher in and near tstms.
Rest of today..E winds 10 to 15 kt. Seas 2 to 3 ft.
Tonight..E winds 10 to 15 kt. Seas 2 to 3 ft.
Mon..E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. A slight chance of tstms. A slight chance of showers in the morning, then a chance of showers in the afternoon.
Mon night..E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. A chance of showers. A slight chance of tstms in the evening, then a chance of tstms after midnight.
Tue..E winds 10 to 15 kt with gusts up to 20 kt. Seas 4 ft. A chance of tstms. A chance of showers in the morning, then showers likely in the afternoon.
Tue night..SE winds 10 to 15 kt with gusts up to 20 kt. Seas 4 ft. Showers likely with a chance of tstms.
Wed..S winds 10 to 15 kt. Seas 3 to 4 ft. Showers likely with a chance of tstms.
Thu..N winds 10 to 15 kt. Seas 3 to 4 ft. Winds and seas higher in and near tstms.
AMZ200 935 Am Edt Sun Sep 19 2021
Synopsis for coastal waters from surf city north carolina to south santee river south carolina out to 20 nautical miles.. High pressure will strengthen over the ne states on Sunday and Monday, maintaining mostly dry weather. Rain chances return on Tuesday with building moisture from the south. A strong cold front will move through the area on Thursday bringing cooler and drier weather through late next week.
Synopsis for coastal waters from surf city north carolina to south santee river south carolina out to 20 nautical miles.. High pressure will strengthen over the ne states on Sunday and Monday, maintaining mostly dry weather. Rain chances return on Tuesday with building moisture from the south. A strong cold front will move through the area on Thursday bringing cooler and drier weather through late next week.
7 Day Forecast for Marine Location Near Briarcliffe Acres, SC
Hourly EDIT Help
location: 33.77, -78.82 debug
Area Discussion for - Wilmington, NC
(on/off) Help NOTE: mouseover dotted underlined text for definitionFXUS62 KILM 191336 AFDILM
Area Forecast Discussion National Weather Service Wilmington NC 936 AM EDT Sun Sep 19 2021
SYNOPSIS. High pressure will persist along the East Coast through Tuesday. Unsettled weather will develop mid-week as an occluded front lifts across the area. A strong cold frontal passage will occur Thursday, followed by high pressure and cooler temperatures for the late week period.
UPDATE. No significant changes were needed to the forecast this morning. 12z soundings from MHX and CHS showed enough dry air aloft to prevent more than one or two very isolated showers across South Carolina.
NEAR TERM /THROUGH MONDAY/. Upper-level ridge axis and surface high pressure will move across the area on Sunday. NE flow will become easterly and SE throughout the day with the steady eastward progression of the highs over the northeastern US. Substantial dry air above the boundary layer will advect southward throughout the day as patchy areas of morning fog and lifting stratus give way to mostly clear skies across the area. As the center of high pressure moves eastward throughout the day, a boundary of dry continental air over southeastern NC will be in contrast to a persistent moist air mass over central SC (portions of which could nose into northeastern SC later in the day). These areas also being removed from the upper ridge axis may allow a stray shower or two. For now, rain chances have been kept south of the area as the latest model runs show the dry air advancing into extreme northeastern SC. Hi-res models are also coming into agreement with little to no precip across the south-western counties. This is also corroborated with the weak lapse rates seen in the observed soundings from the neighbors. Highs similar to yesterday, upper 80s for most.
Drier air begins to retreat on Monday as high pressure shifts further offshore and column flow becomes more southeasterly, tapping into the Gulf moisture. Shower chances increase from south to north during the afternoon; areas to our south on Sunday should be a good preview of what to expect. Highs in the mid to upper 80s. Stratus may become a concern Sunday night into Monday morning with the onshore flow and a mid-level inversion trapping moisture overnight.
SHORT TERM /MONDAY NIGHT THROUGH TUESDAY NIGHT/. Mid-level dry air will hold on Monday night into Tuesday associated with a high- amplitude ridge axis aligned just off the eastern seaboard. The surface high will shift off the New England coast, and continue to push low-level Atlantic moisture into the eastern Carolinas. As the 500 mb ridge shifts east, deeper Gulf moisture will surge northward ahead of a digging 500 mb shortwave which will sweep towards the Mississippi River Valley Tuesday night. There are signals/agreement in GFS/ECMWF that a significant precip event could be setting up for the SC coast Tuesday-Tuesday night. Time-height cross sections show the column becomes saturated on Tuesday, with increasing flow off the Atlantic from the surface through about 400 mb. Onshore flow will keep high temps on Tuesday near climo, although if widespread precip develops, could easily stay a category lower. Nighttime lows will be propped up above climo, as dewpoints remain in the upper 60s to lower 70s.
LONG TERM /WEDNESDAY THROUGH SATURDAY/. Amplified trough will evolve into a closed low that will lift across the Great Lakes Wednesday night and Thursday. An associated cold front will sweep across the Carolinas Wednesday night, and models continue to suggest that it will move off the coast between midnight Wednesday night and sunrise Thursday morning. Showers/tstms along and ahead of the front should be offshore by Thursday afternoon. GFS is indicating the front stalling just to our south late week, then returning northward on Saturday, which doesn't seem unreasonable given the orientation of the front with the mid-level flow.
AVIATION /14Z SUNDAY THROUGH THURSDAY/. Lingering sub-VFR conditions across inland areas are quickly improving this morning. Expect scattered diurnal clouds around 4-5 kft to develop by early afternoon, with high pressure keeping area dry. Relatively light northeast winds early will turn easterly by 18z, with gusts around 15 kt across coastal terminals. Northeast winds tonight around 5 kt may be enough to inhibit any fog formation.
Extended Outlook . Predominantly VFR, with chance for patchy sub-VFR visibilities each morning.
MARINE. Through Monday Night . Building high pressure out of the northeast will promote a compressed gradient across the coastal waters today. NE winds early 10-15 knots will become easterly around 15 knots during the afternoon and evening as high pressure progresses eastward. Gusts around 20 knots today with seas building from 2-3 early to 3-4 feet this evening. High pressure strengthens on Monday with a weak frontal boundary to our south beginning to approach the area. This will maintain the compressed gradient and easterly flow will again build to 15-20 knots, isolated gusts up to 25 knots. Seas 3-5 feet.
Monday night through Thursday . Surface high pressure will be centered off the New England coast through Wednesday, resulting in onshore flow on the order of 10-15 kt. A cold front will cross the Appalachians Wednesday, and winds over the waters will veer to the south, with the cold front expected to move across the waters Wednesday night. Showers and thunderstorms along and ahead of the front will taper off Thursday, with high pressure building in Thursday afternoon and Friday. A post-frontal northeast surge of 15-20 kt is possible Thursday night. Some uncertainty for the end of the week as some models are showing the front stalling just to the south, and therefore a moderate gradient may linger over the waters.
ILM WATCHES/WARNINGS/ADVISORIES. SC . None. NC . Coastal Flood Advisory from 7 PM this evening to midnight EDT tonight for NCZ107. MARINE . None.
SYNOPSIS . ILM UPDATE . TRA NEAR TERM . 21 SHORT TERM . CRM LONG TERM . CRM AVIATION . VAO MARINE . ILM
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 |
| MROS1 - 8661070 - Springmaid Pier, SC | 9 mi | 55 min | 78°F | |||||
| SSBN7 | 18 mi | 128 min | 81°F | 1 ft | ||||
| 41024 - Sunset Nearshore (SUN 2) | 19 mi | 77 min | ENE 7.8 G 14 | 77°F | 82°F | 1021.1 hPa | ||
| NIWS1 - North Inlet-Winyah Bay Reserve, SC | 35 mi | 100 min | NNE 5.1 | 77°F | 1019 hPa | 74°F | ||
| 41108 | 43 mi | 55 min | 81°F | 2 ft |
Wind History for Springmaid Pier, SC
(wind in knots) EDIT (on/off) Help| Last 24hr | ||||||||||||||||||||||||
| 1 day ago | ||||||||||||||||||||||||
| 2 days ago |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports. Follow links for more data.| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| North Myrtle Beach Grand Strand Airport, SC | 6 mi | 32 min | NE 7 | 10.00 mi | A Few Clouds | 81°F | 71°F | 72% | 1020.1 hPa |
| Myrtle Beach International Airport, SC | 8 mi | 29 min | Var 5 | 10.00 mi | Mostly Cloudy | 79°F | 73°F | 82% | 1020.3 hPa |
| Conway Horry County Airport, SC | 17 mi | 30 min | ENE 5 | 10.00 mi | Fair | 79°F | 72°F | 79% | 1020.3 hPa |
Link to 5 minute data for KCRE
Wind History from CRE (wind in knots)
| 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 | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | |
| Last 24hr | NE | N | SE | SE G16 | S | SE | SE | SE | E | E | E | SE | Calm | Calm | Calm | Calm | N | Calm | N | N | NE | NE | NE | NE |
| 1 day ago | N | NW | NW | Calm | NW | NW | W | Calm | W | Calm | Calm | Calm | Calm | NW | Calm | N | Calm | N | N | NE | NE | NE | NE | |
| 2 days ago | NE | NE | N | NE G16 | N | SE | E | W | NW | Calm | NW | N | Calm | N | N | Calm | N | N | N | NE | N |
Tide / Current Tables for North Myrtle Beach, ICWW, South Carolina
EDIT Weekend mode (on/off) (on/off) Help One Week of DataNorth Myrtle Beach
Click for Map
Sun -- 04:09 AM EDT 0.33 feet Low Tide
Sun -- 05:27 AM EDT Moonset
Sun -- 07:01 AM EDT Sunrise
Sun -- 09:18 AM EDT 2.15 feet High Tide
Sun -- 04:22 PM EDT 0.18 feet Low Tide
Sun -- 06:59 PM EDT Moonrise
Sun -- 07:15 PM EDT Sunset
Sun -- 09:48 PM EDT 2.40 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sun -- 04:09 AM EDT 0.33 feet Low Tide
Sun -- 05:27 AM EDT Moonset
Sun -- 07:01 AM EDT Sunrise
Sun -- 09:18 AM EDT 2.15 feet High Tide
Sun -- 04:22 PM EDT 0.18 feet Low Tide
Sun -- 06:59 PM EDT Moonrise
Sun -- 07:15 PM EDT Sunset
Sun -- 09:48 PM EDT 2.40 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
| 12 am | 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 | 9 pm | 10 pm | 11 pm |
| 1.7 | 1.3 | 0.8 | 0.5 | 0.3 | 0.5 | 0.9 | 1.4 | 1.9 | 2.1 | 2.1 | 1.9 | 1.6 | 1.2 | 0.7 | 0.4 | 0.2 | 0.3 | 0.7 | 1.3 | 1.9 | 2.3 | 2.4 | 2.3 |
Tide / Current Tables for Myrtle Beach Airport, ICWW, South Carolina
EDIT (on/off) Help One Week of DataMyrtle Beach Airport
Click for Map
Sun -- 03:09 AM EDT 0.33 feet Low Tide
Sun -- 05:26 AM EDT Moonset
Sun -- 07:01 AM EDT Sunrise
Sun -- 08:41 AM EDT 3.26 feet High Tide
Sun -- 03:23 PM EDT 0.18 feet Low Tide
Sun -- 06:59 PM EDT Moonrise
Sun -- 07:15 PM EDT Sunset
Sun -- 09:11 PM EDT 3.64 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sun -- 03:09 AM EDT 0.33 feet Low Tide
Sun -- 05:26 AM EDT Moonset
Sun -- 07:01 AM EDT Sunrise
Sun -- 08:41 AM EDT 3.26 feet High Tide
Sun -- 03:23 PM EDT 0.18 feet Low Tide
Sun -- 06:59 PM EDT Moonrise
Sun -- 07:15 PM EDT Sunset
Sun -- 09:11 PM EDT 3.64 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
| 12 am | 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 | 9 pm | 10 pm | 11 pm |
| 1.9 | 1.2 | 0.6 | 0.3 | 0.5 | 1.1 | 1.9 | 2.7 | 3.1 | 3.2 | 3 | 2.5 | 1.9 | 1.2 | 0.5 | 0.2 | 0.3 | 0.9 | 1.7 | 2.6 | 3.3 | 3.6 | 3.5 | 3.1 |
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