Sunday, April18, 2021
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Marine Weather and Tides
Socastee, SC

Version 3.4
NOTICE
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 6:39AMSunset 7:50PM Sunday April 18, 2021 4:12 PM EDT (20:12 UTC) Moonrise 9:58AMMoonset 12:04AM Illumination 43% Phase: First Quarter Moon; Moon at 7 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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AMZ254 Coastal Waters From Little River Inlet To Murrells Inlet Sc Out 20 Nm- 256 Pm Edt Sun Apr 18 2021
Through 7 pm..SE winds 5 to 10 kt. Seas 2 ft.
Tonight..SW winds 5 to 10 kt. Seas 2 ft. A slight chance of showers after midnight.
Mon..SW winds 5 to 10 kt. Seas 2 ft.
Mon night..N winds 10 kt, becoming ne after midnight. Seas 2 to 3 ft.
Tue..E winds 5 to 10 kt. Seas 2 ft.
Tue night..SE winds 5 to 10 kt. Seas 2 ft.
Wed..SW winds 10 to 15 kt. Seas 2 to 3 ft.
Wed night..NW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft.
Thu..NW winds 5 to 10 kt, becoming W 10 to 15 kt. Seas 2 to 3 ft.
Fri..NE winds 5 to 10 kt, becoming s. Seas 2 ft.
AMZ200 256 Pm Edt Sun Apr 18 2021
Synopsis for coastal waters from surf city north carolina to south santee river south carolina out to 20 nautical miles.. Light and variable winds will continue through the middle of the week as waves of low pressure passes well offshore. Winds will begin to increase Wednesday ahead of an approaching cold front. Offshore flow will develop Thursday following the passage of the front.


7 Day Forecast for Marine Location Near Socastee, SC
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location: 33.69, -79.01     debug


Area Discussion for - Wilmington, NC
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FXUS62 KILM 181958 AFDILM

Area Forecast Discussion National Weather Service Wilmington NC 358 PM EDT Sun Apr 18 2021

SYNOPSIS. Weak low pressure moving south of Cape Fear will bring small rain chances to Southeast North Carolina Monday, with another chance of rain along the coast late Tuesday. A dry cold front will cross the area late Wednesday, with cool and dry high pressure moving in Thursday and Friday. A storm system will approach from the Gulf Coast states on Saturday.

NEAR TERM /THROUGH MONDAY NIGHT/. Satellite shows scattered cumulus beginning to feed on a weak sea breeze boundary which will continue to meander inland this afternoon. A dry environment in place along with help from a subsidence inversion aloft is making shower development difficult over this area. Therefore, expect most folks in our ares to remain rain-free this evening as a weak wave of low pressure continues to move offshore. Overnight lows will stay in the upper 50s with increasing cloud cover out of the south due to the proximity of the aforementioned disturbance. More defined and well-organized shortwave will approach the area on Monday. We will still be stuck in a dry environment with a significant subsidence inversion around 700 mb. In addition, dry air advection above the inversion will likely limit shower chances after Monday morning. Will keep the mention of a few low-topped showers possible due to such a potent energy center traversing northern NC and southern VA, but the best chance looks to be earlier in the day. High temperatures will jump into the upper 70s to near 80 with skies clearing during the afternoon. Good radiational cooling and dry surface layer will allow overnight temperatures to drop into the upper 40s to around 50.

SHORT TERM /TUESDAY THROUGH TUESDAY NIGHT/. Weak sfc low pressure passes well off to the S on Tue, and included just low end PoPs over SE areas mainly for the Tue night period where mid-level shortwave energy will be strongest. Any precip will be light, and kept thunder out of the forecast at this point. Temps will be near normal for late April . highs in the low 70s along the coast, with mid/upr 70s inland.

LONG TERM /WEDNESDAY THROUGH SUNDAY/. A strong cold front crosses the area late Wed, and maintained previous thinking that moisture will be quite lacking so expect the front to pass by dry with only a few clouds. Breezy SW flow becomes NW behind the front Wed night, remaining gusty at times. With this setup, bumped up low temps Wed night a bit as guidance often has a low bias with temps when winds stay elevated overnight. The CAA weakens into Thu and Fri as sfc high pressure moves through the area, with temps about 5-10 degrees below normal both days. Next chance of rain arrives over the weekend. The 12Z GFS has a much stronger southern stream system than the ECMWF, but they both show a good chance of rain over the weekend regardless so bumped up PoPs to 50-60% Sat/Sat night.

AVIATION /19Z SUNDAY THROUGH FRIDAY/. VFR conditions will continue through the next 24 hours. An afternoon cumulus deck has popped up at 7000-8000ft, in part due to the seabreeze. This seabreeze may also spawn a light shower this afternoon near KILM, but confidence on that is quite low. Winds will continue to be under 10kts with varying direction. Winds calm by sunset. May have some MVFR fog that develops before sunrise for the coastal terminals, and possibly KLBT, though there should be a little more mixing there that inhibits fog. Any fog that forms should erode away by 12-13Z. Winds become northwesterly at 8-10kts towards the end of the TAF period.

Extended Outlook . VFR, with occasional middle and high clouds as several weak waves traverse the region. A moderately strong cold front Wednesday night may bring restrictions.

MARINE. Through Monday Night: Winds remain light and variable this evening as a weak surface low continues to move offshore. SC coastal waters could see a brief enhancement of the gradient as the low pulls away from the coastline, therefore expect southerly winds around 10 knots. A weak boundary will push through the area tomorrow afternoon, bringing southerly winds to a northerly direction; still remaining around or less than 10 knots through Tuesday morning. Seas generally 2-3 feet.

Tuesday Through Friday: Weak sfc high pressure passes offshore on Tue, with SE flow in its wake up to 10-15 kt over the coastal waters. SW winds then increase through the day Wed as the pressure gradient increases ahead of an approaching cold front. Following the cold fropa Wed evening, CAA appears moderate so SCA conditions are likely, and bumped up wind speeds a bit above guidance. Seas only make it to around 5 ft, but gusts up to 30 kt are possible. Improving marine conditions then for Thu and Fri as sfc high pressure passes through the area.

ILM WATCHES/WARNINGS/ADVISORIES. SC . None. NC . None. MARINE . None.

SYNOPSIS . ILM NEAR TERM . 21 SHORT TERM . MAS LONG TERM . MAS AVIATION . IGB MARINE . MAS/21


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MROS1 - 8661070 - Springmaid Pier, SC 6 mi55 min 67°F
NIWS1 - North Inlet-Winyah Bay Reserve, SC 25 mi88 min SSE 9.9 70°F 1010 hPa60°F
41024 - Sunset Nearshore (SUN 2) 30 mi65 min SSE 7.8 G 12 66°F 66°F1011.5 hPa
SSBN7 30 mi56 min 1 ft

Wind History for Springmaid Pier, SC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Myrtle Beach International Airport, SC4 mi77 minSE 810.00 miFair70°F62°F76%1010.4 hPa
Conway Horry County Airport, SC11 mi18 minSW 310.00 miPartly Cloudy73°F48°F41%1009.5 hPa
North Myrtle Beach Grand Strand Airport, SC17 mi20 minSSE 1010.00 miFair69°F61°F76%1009.7 hPa

Link to 5 minute data for KMYR

Wind History from MYR (wind in knots)
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Last 24hrS9S10S8S10S9S8S6S5S4S5S5S3CalmN4CalmNW4N6N3SE5SE6SE8SE10SE8S11
1 day agoS10S9S8S7SW4CalmSW4SW5W6W5W4W4NW5W5NW8N8N8N4Calm35E8SE8SE10
2 days agoW10W10N7NW5N6N3NE5CalmCalmN4N12
G17
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N7N9N8N6--N7N84SE7SE8S6S11

Tide / Current Tables for Socastee Bridge, ICWW, South Carolina
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Socastee Bridge
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Sun -- 01:04 AM EDT     Moonset
Sun -- 03:51 AM EDT     2.01 feet High Tide
Sun -- 06:41 AM EDT     Sunrise
Sun -- 10:57 AM EDT     Moonrise
Sun -- 11:47 AM EDT     0.58 feet Low Tide
Sun -- 04:13 PM EDT     1.60 feet High Tide
Sun -- 07:49 PM EDT     Sunset
Sun -- 11:50 PM EDT     0.52 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.61.11.61.921.91.81.51.210.80.60.60.81.21.51.61.61.51.31.10.90.70.6

Tide / Current Tables for Myrtle Beach, South Carolina
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Myrtle Beach
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Sun -- 12:02 AM EDT     4.61 feet High Tide
Sun -- 01:04 AM EDT     Moonset
Sun -- 06:25 AM EDT     0.69 feet Low Tide
Sun -- 06:40 AM EDT     Sunrise
Sun -- 10:57 AM EDT     Moonrise
Sun -- 12:43 PM EDT     3.66 feet High Tide
Sun -- 06:26 PM EDT     0.71 feet Low Tide
Sun -- 07:49 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.64.43.82.91.91.20.70.81.21.92.63.23.63.63.42.71.91.20.80.81.32.133.8

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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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