Saturday, October23, 2021
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Marine Weather and Tides
Socastee, SC

Version 3.4
NOTICE
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 7:26AMSunset 6:34PM Saturday October 23, 2021 4:06 PM EDT (20:06 UTC) Moonrise 7:28PMMoonset 9:09AM Illumination 91% Phase: Waning Gibbous; Moon at 18 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- 342 Pm Edt Sat Oct 23 2021
Through 7 pm..SW winds 5 kt. Seas 2 ft.
Tonight..E winds 5 to 10 kt. Seas 2 ft.
Sun..E winds 5 to 10 kt. Seas 2 ft.
Sun night..SE winds 10 kt. Seas 2 to 3 ft.
Mon..S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers with a slight chance of tstms.
Mon night..SW winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers and tstms.
Tue..NW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft.
Tue night..NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft.
Wed..W winds 5 to 10 kt. Seas 2 to 3 ft.
Thu..SE winds 5 to 10 kt, becoming sw 10 to 15 kt. Seas 2 to 4 ft, building to 4 to 5 ft. Showers likely through the day, then a chance of showers through the night. Winds and seas higher in and near tstms.
AMZ200 342 Pm Edt Sat Oct 23 2021
Synopsis for coastal waters from surf city north carolina to south santee river south carolina out to 20 nautical miles.. Weak high pressure centered across the southern appalachians this evening will quickly move east and offshore from the mid-atlantic coast Sun. Low pressure will pass by and remain offshore from the carolinas Sun night thru Mon with widely scattered showers possible. A cold frontal passage accompanied with scattered convection will push thru Mon night followed with possible sca conditions Tue. High pressure will build in Tue night thru Wed followed by an approaching strong cold frontal system Thu.


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 231619 AFDILM

Area Forecast Discussion National Weather Service Wilmington NC 1219 PM EDT Sat Oct 23 2021

SYNOPSIS. Drier weather but continued above normal temps are expected this weekend as weak high pressure builds in. The next cold front will approach Monday night bringing showers and possibly thunderstorms to the area. Brief and dry high pressure will build in for the mid-week period of next week followed by a strong low pressure system for the late week period.

UPDATE. As seen on visible sat imagery and local sfc obs trends, pesky low stratus and areas of fog will affect the Pender and New Hanover Counties of Southeast NC, mainly east of a line from Wallace to Wilmington NC.Post frontal drier air mixing, also aided by the days insolation, will scour out the low level moisture. leaving Cu/SC development. Thus by midday, mostly sunny skies should prevail. Will need to adjust hrly temps/dewpts underneath the canopy of low clouds/fog but the days high temps still look aok. Outside the low stratus/fog, the forecast scheme remains unchanged.

NEAR TERM /THROUGH SUNDAY/. A little fog has formed within residual low level moisture near the coast early this morning. As vertical mixing develops after sunrise, dewpoints should plunge and mainly clear skies are expected for the remainder of the day. The cold front will move farther off the coast as high pressure across the southern Appalachians moves eastward and highs should reach the upper 70s.

High pressure will move eastward across Virginia tonight, close enough to drop winds to near calm. Good radiational cooling should drop lows to near 50 inland with mid 50s on the coast. The high will quickly move off the coast Sunday allowing onshore winds to develop. Inland areas should warm into the lower 80s, but marine influence should keep the beaches in the upper 70s.

SHORT TERM /SUNDAY NIGHT THROUGH MONDAY NIGHT/. High pressure offshore Sunday night will maintain southerly flow across the area through late Monday, keeping temps well above normal. Aloft, a shortwave trough will be moving south of the Great Lakes on Monday before moving north of our area Monday night. The surface low associated with the shortwave moves across the Northeast as the attending cold front approaches the eastern Carolinas Monday night. PW values increase to around 1.5" Monday evening into early overnight values, and although best forcing looks to remain to our north still expect scattered showers Monday night. As trough approaches late Monday, bulk shear values increase to 40+ kts with 0- 1km SRH values around 100 m2/s2. Therefore, SPC has SE NC and NE SC in a marginal risk for severe weather for convection ahead of the cold front for isolated severe wind gusts possible. Low temps around 60 Sunday and Monday night, with high temps near 85 degrees, a good 10 degrees above normal.

LONG TERM /TUESDAY THROUGH SATURDAY/. Cold front moves offshore early Tuesday, with high pressure and deep dry air building in from the north late Tuesday through Wednesday. Temps cool slightly to near normal values Tuesday and Wednesday with CAA behind exiting low to the north. Large uncertainty remains in the forecast for Wednesday night through Friday. A second, deeper trough is forecasted to dig down into the southern states Wednesday into Thursday, as models continue to disagree with timing with GFS being the quicker solution. Height falls ahead of the trough will support surface low development across the South and East coast Wednesday night through Friday. While timing is uncertain, a warm front looks to lift north sometime on Thursday, with a cold front following it ushering in cooler and drier air by late Friday.

Rain chances look good for sometime Thursday into Friday with high PW values and strong dynamics. Something to keep an eye on will be potential for severe weather with the late week system. At the moment, instability appears to be hard to find with ample cloud coverage and majority of ensemble members keep CAPE values below 200. However, the shear dynamics aloft are forecasted to be pretty strong and any instability would be concerning.

AVIATION /16Z SATURDAY THROUGH WEDNESDAY/. A mild air mass will give us VFR conditions. Light northwest flow this afternoon will become calm tonight with some ground fog possible after midnight. Light gradient on Sunday.

Extended Outlook . VFR. Convection is possible Monday night.

MARINE. Through Sunday . A cold front will move farther off the Carolina coast today, pushed eastward by high pressure across the southern Appalachians. Northwest winds this morning will veer northerly this afternoon, then will turn onshore by Sunday as the high quickly moves off the Virginia coast. Strong winds overnight kicked seas up to 4 feet near Cape Fear, and it will take all morning for seas to settle down toward 2 feet this afternoon. Sea heights should remain there through Sunday in a combination of 8 second southeast swell and a shorter period wind chop.

Sunday Night through Wednesday . With high pressure offshore, south winds around 10-15 kts dominate Sunday night and Monday. As cold front approaches from the west, winds strengthen to 15-20 kts Monday night through Tuesday, turning from the SW Monday early Monday night to northwesterly by Tuesday afternoon. Convection ahead of the cold front Monday night may bring strong winds to coastal waters as they move offshore. Brief high pressure returns on Wednesday weakening winds slightly. Seas 2-3 ft Sunday night will be increasing during the day Monday as SE swell increases. Offshore wind chop mixes in Monday night into Tuesday, increasing seas to 4 ft by Tuesday morning. 3-4 ft seas late Tuesday will relax to 2-3 ft by daytime Wednesday. Although outside this forecast period, worth mentioning the next system is expected to impact the area late next week with Small Craft Advisory conditions possible beginning Thursday.

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

SYNOPSIS . ILM UPDATE . DCH NEAR TERM . TRA SHORT TERM . VAO LONG TERM . VAO AVIATION . 43 MARINE . TRA/VAO


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MROS1 - 8661070 - Springmaid Pier, SC 6 mi49 min 71°F
NIWS1 - North Inlet-Winyah Bay Reserve, SC 25 mi82 min W 4.1 77°F 1016 hPa53°F
41024 - Sunset Nearshore (SUN 2) 30 mi59 min SSW 5.8G7.8 71°F 74°F1016 hPa
SSBN7 30 mi56 min 74°F1 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 mi71 minSSE 710.00 miFair74°F57°F56%1015.8 hPa
Conway Horry County Airport, SC11 mi72 minN 010.00 miFair73°F52°F47%1015.9 hPa
North Myrtle Beach Grand Strand Airport, SC17 mi74 minS 710.00 miFair74°F58°F57%1015.5 hPa

Link to 5 minute data for KMYR

Wind History from MYR (wind in knots)
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Last 24hrS9S6S5S4SW6SW5SW4W4W7W7W6W5NW30NW4NW4NW4N6NE45W74SE7SE7
1 day agoS11
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2 days agoS10S10S9S4SW5SW5SW5SW5SW5SW6SW6W7W6W3W4W4SW4W10SW7SW7SW9S10S10S10

Tide / Current Tables for Socastee Bridge, ICWW, South Carolina
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Socastee Bridge
Click for Map
Sat -- 01:30 AM EDT     2.03 feet High Tide
Sat -- 07:27 AM EDT     Sunrise
Sat -- 08:54 AM EDT     0.33 feet Low Tide
Sat -- 10:09 AM EDT     Moonset
Sat -- 01:47 PM EDT     2.32 feet High Tide
Sat -- 06:32 PM EDT     Sunset
Sat -- 08:27 PM EDT     Moonrise
Sat -- 09:26 PM EDT     0.56 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Tide / Current Tables for Myrtle Beach, South Carolina
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Myrtle Beach
Click for Map
Sat -- 03:34 AM EDT     0.26 feet Low Tide
Sat -- 07:27 AM EDT     Sunrise
Sat -- 09:46 AM EDT     5.58 feet High Tide
Sat -- 10:09 AM EDT     Moonset
Sat -- 04:11 PM EDT     0.70 feet Low Tide
Sat -- 06:32 PM EDT     Sunset
Sat -- 08:27 PM EDT     Moonrise
Sat -- 10:07 PM EDT     4.66 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Weather Map
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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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