Thursday, September23, 2021
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Marine Weather and Tides
Murrells Inlet, 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 7:03AMSunset 7:12PM Thursday September 23, 2021 2:23 PM EDT (18:23 UTC) Moonrise 7:53PMMoonset 8:26AM Illumination 94% Phase: Waning Gibbous; Moon at 17 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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AMZ256 Coastal Waters From Murrells Inlet To South Santee River Sc Out 20 Nm- 1231 Pm Edt Thu Sep 23 2021
This afternoon..NW winds 10 kt. Seas 3 to 4 ft.
Tonight..N winds 10 to 15 kt. Seas 3 to 4 ft.
Fri..N winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Seas 3 to 4 ft.
Fri night..N winds 10 to 15 kt. Seas 3 to 4 ft.
Sat..N winds 5 to 10 kt. Seas 2 to 3 ft.
Sat night..NW winds 5 to 10 kt. Seas 2 to 3 ft.
Sun..W winds 5 to 10 kt. Seas 2 to 3 ft.
Mon..SW winds 5 to 10 kt. Seas 2 ft.
AMZ200 1231 Pm Edt Thu Sep 23 2021
Synopsis for coastal waters from surf city north carolina to south santee river south carolina out to 20 nautical miles.. A strong cold front will move off the coast this morning, then stall well offshore. High pressure will build in through the weekend. A dry cold front will cross the coast early Monday, reinforcing dry high pressure into next week.


7 Day Forecast for Marine Location Near Murrells Inlet, SC
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location: 33.54, -79.1     debug


Area Discussion for - Wilmington, NC
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FXUS62 KILM 231709 AFDILM

Area Forecast Discussion National Weather Service Wilmington NC 109 PM EDT Thu Sep 23 2021

SYNOPSIS. Cooler and dry early fall air will settle into the region with no rain in the forecast until late next week. Temperatures near to below normal this weekend will be reinforced by a dry cold front early Monday. A warming trend is expected by mid-week.

UPDATE. Small craft allowed to expire at noon. Clearing will trend with dewpoints falling through afternoon and overnight. A cool start to Saturday will see a good warm up with sunshine and downslope wind flow, with mugginess out of the picture.

NEAR TERM /THROUGH FRIDAY/. At the moment, the sfc cold front and the back edge of the deep moisture cutoff extends from Fayetteville NC to Georgetown SC. This has made decent progress overnight and should finally push east of the ILM CWA around midday, then stalling offshore for the reminder of this fcst period. That is because, the upper low lifts N-NE across the Great Lakes into Canada by the end of this period. The upper trof axis extending from the upper low remains west of the ILM CWA this period and as a result, the flow aloft becomes parallel to the cold front once offshore and thus it becomes stationary. Will still deal with shower/tstorm activity along and ahead of the cold front, with QPF values minimal. Latest various model RH Time Height displays indicate a rather dry atm column especially above 850mb. Various Model soundings drop PWs below 1 inch by or during this afternoon, and further drop to generally around 1/2 inch by and during Fri. For both days, stayed close to the model MOS Consensus with highs both days generally mid-upper 70s to around 80 closer to the coast Tonights lows? . drum roll . widespread 50s with low 60s at the coast. A touch of Autumn will be in the air! Perfect timing with the Fall Equinox having occurred yesterday at 330 PM EDT.

SHORT TERM /FRIDAY NIGHT THROUGH SATURDAY NIGHT/. Fall weather will settle over the area for the weekend as high pressure migrates slowly across the Carolinas. Northerly winds will exist at the sfc with a more westerly flow developing aloft as a trough extends down from the Great Lakes into the Carolinas. Overall, a deep column of dry air will exist with broad area of pcp water values down near a half inch covering the Southeast. Aside from a few passing higher clouds, there will be plenty of sunshine on Sat with temps reaching up near 80. Overnight lows will be down into the lower 50s inland with temps closer to 60 along the coast both Fri and Sat night, but Fri night will be a bit cooler.

LONG TERM /SUNDAY THROUGH WEDNESDAY/. Dry weather will continue into next week with a gradual warming as high pressure migrates slowly across the Southeast. Dry air mass with warm and sunny days and low humidity will gradually modify from Sunday through midweek. Temps closer to 80 on Sun will reach up into the mid 80s as a warmer and slightly moisture southerly return flow develops late Mon into midweek as the center of high shifts off the coast. Overnight lows will gradually warm, as well with 50s most places inland of the beaches sun morning but more widespread 60s by Wed morning. Not counting on any pcp through the period.

AVIATION /17Z THURSDAY THROUGH MONDAY/. MVFR stratus across far eastern NC will clear out of ILM around 18-19z, with front and clouds moving further to the east. Clear skies and dry weather for the area through tomorrow afternoon. Predominantly northwesterly winds this afternoon will turn northerly for tomorrow around 10 kts.

Extended Outlook . VFR and high pressure will dominate throughout the extended. A dry CFP will occur Sun, followed by continued high pressure.

MARINE. Through Friday . SCA for the NC Waters only to end around 6am this morning. The CFP will occur during this morning for the ILM SC waters and midday thru early afternoon for the ILM NC Waters. After FROPA, winds will veer to the NW 10 to 15 kt, then further veer to the N 10-20 kt as CAA and the influx of drier air peak. Have gone slightly hier than guidance with wind speeds due to the amount of CAA and advection of lower dewpoints across continued warm SSTs. Seas generally 3 to 5 ft today, few 6 footers early this morning across the waters from Cape Fear north. Seas will not subside as fast even given an offshore wind trajectory. There is an underlying ESE 10-12 second period swell thats now affecting the local waters and will slowly fade to 8 to 10 second periods during Fri as the northerly surge keeps short period wind waves rocking.

Friday night through Monday . High pressure settles over the Carolinas for the weekend and then migrates offshore late Mon into Tues. This will maintain benign marine conditions with northerly winds generally less than 15 kts as they veer slowly around with a light southerly return flow developing Mon night into Tues. Seas will drop from 3 to 4 ft Fri night down to less than 3 ft by the latter half of the weekend into early next week as a longer period easterly swell begins to dominate.

ILM WATCHES/WARNINGS/ADVISORIES. SC . None. NC . High Rip Current Risk until 8 PM EDT this evening for NCZ106- 108. MARINE . None.

SYNOPSIS . ILM UPDATE . 08 NEAR TERM . DCH SHORT TERM . RGZ LONG TERM . RGZ AVIATION . VAO MARINE . DCH/RGZ


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MROS1 - 8661070 - Springmaid Pier, SC 13 mi54 min 77°F
NIWS1 - North Inlet-Winyah Bay Reserve, SC 14 mi99 min NW 7 75°F 1012 hPa63°F
41024 - Sunset Nearshore (SUN 2) 39 mi76 min NNW 9.7 G 14 74°F 81°F1013.7 hPa
SSBN7 39 mi67 min 80°F2 ft

Wind History for Springmaid Pier, SC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Myrtle Beach International Airport, SC14 mi28 minWNW 1110.00 miFair79°F63°F58%1012.3 hPa
Conway Horry County Airport, SC20 mi29 minN 6 miFair77°F59°F54%1012.9 hPa
Georgetown County Airport , SC20 mi29 minNNW 610.00 miFair79°F61°F54%1012.9 hPa

Link to 5 minute data for KMYR

Wind History from MYR (wind in knots)
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Tide / Current Tables for Wachesaw Landing, Waccamaw River, South Carolina
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Wachesaw Landing
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Thu -- 01:12 AM EDT     3.13 feet High Tide
Thu -- 07:05 AM EDT     Sunrise
Thu -- 08:02 AM EDT     0.30 feet Low Tide
Thu -- 09:26 AM EDT     Moonset
Thu -- 01:29 PM EDT     3.22 feet High Tide
Thu -- 07:11 PM EDT     Sunset
Thu -- 08:25 PM EDT     0.59 feet Low Tide
Thu -- 08:52 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.83.132.72.21.610.50.30.61.32.12.83.23.22.92.51.91.40.90.60.71.21.9

Tide / Current Tables for Garden City Pier (ocean), South Carolina
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Garden City Pier (ocean)
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Thu -- 03:39 AM EDT     0.38 feet Low Tide
Thu -- 07:04 AM EDT     Sunrise
Thu -- 09:26 AM EDT     Moonset
Thu -- 09:52 AM EDT     5.89 feet High Tide
Thu -- 04:02 PM EDT     0.74 feet Low Tide
Thu -- 07:10 PM EDT     Sunset
Thu -- 08:51 PM EDT     Moonrise
Thu -- 10:11 PM EDT     5.44 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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42.71.40.60.41.12.43.84.95.75.95.54.63.42.11.10.71.12.13.34.35.15.45.3

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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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