Monday, March30, 2020
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Marine Weather and Tides
Murrells Inlet, SC

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 7:03AMSunset 7:36PM Monday March 30, 2020 4:01 PM EDT (20:01 UTC) Moonrise 9:55AMMoonset 12:00AM Illumination 42% 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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AMZ256 Coastal Waters From Murrells Inlet To South Santee River Sc Out 20 Nm- 316 Pm Edt Mon Mar 30 2020
.small craft advisory in effect from Tuesday evening through Wednesday afternoon...
Tonight..SW winds 10 kt or less, becoming N late. Seas 2 ft.
Tue..NE winds 10 to 15 kt, becoming E 15 to 20 kt in the afternoon. Seas 3 to 4 ft. A chance of showers in the afternoon.
Tue night..E winds 15 to 20 kt, becoming N 20 to 25 kt after midnight. Seas 4 to 5 ft, building to 5 to 7 ft after midnight. Showers with a slight chance of tstms in the evening, then showers after midnight.
Wed..N winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Seas 5 to 7 ft, subsiding to 4 to 5 ft in the afternoon. A slight chance of showers.
Wed night..N winds 10 to 15 kt, diminishing to 10 kt after midnight. Seas 3 to 4 ft.
Thu..NW winds 10 kt. Seas 2 to 3 ft.
Fri..NE winds 10 kt. Seas 2 to 3 ft.
Sat..NE winds 10 kt, becoming e. Seas 3 to 4 ft. Winds and seas higher in and near tstms.
AMZ200 316 Pm Edt Mon Mar 30 2020
Synopsis for coastal waters from surf city north carolina to south santee river south carolina out to 20 nautical miles.. A dry cold front will move across the carolinas late tonight, stalling to our south on Tuesday. Low pressure will deepen along the front, moving off the coast Tuesday night with rain, wind, and large seas expected. High pressure will build in from the west through Saturday.


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 301919 AFDILM

Area Forecast Discussion National Weather Service Wilmington NC 319 PM EDT Mon Mar 30 2020

SYNOPSIS. A low pressure system tracking across the southeast US will push across the Carolinas Tuesday into Tuesday night before moving out to sea during the day on Wednesday. High pressure will bring below normal temperatures late in the week. Warming trend begins next weekend with return of slight rain chances Sunday into early next week.

NEAR TERM /THROUGH TUESDAY NIGHT/. A low amplitude mid and upper level ridge centered across the Bahamas will give way to trough approaching from the west on Tuesday. This should spell an end of the above normal temperatures and dry weather of the past few days.

A weak cold front passed through the area early this morning, allowing significantly drier air to move into the Carolinas. Dewpoints are in the 40s now versus 60s this time yesterday. Another front currently positioned near Washington DC should move south and across the eastern Carolinas late tonight. There is a surprisingly large spread in model low temps ranging from around 50 to the upper 50s. Differences in anticipated radiational cooling due to various modeled arrival times of the denser mid and high clouds may be responsible for this. I'm splitting the difference with mid 50s for most areas, except lower 50s in the typical radiational cooling spots.

Mid and high clouds should become a solid overcast on Tuesday with highs reaching the mid to upper 60s for most areas. Tonight's cold front should stall across southernmost South Carolina on Tuesday, with deepening low pressure moving along it across Georgia to near Beaufort, SC by Tuesday evening. The pulse of stronger isentropic lift just ahead of the low doesn't appear to reach our area until mid to late afternoon, so I've delayed the ramp-up in PoPs until then. Once it begins, rain should quickly become moderate to occasionally heavy with some elevated convective elements expected, particularly across coastal South Carolina. PoPs of 90-100 percent are forecast between 5pm and midnight, with lighter showery precip expected overnight as cold air builds in behind the departing low.

SHORT TERM /WEDNESDAY THROUGH WEDNESDAY NIGHT/. Deepening low pressure system will be east of the Outer Banks Wednesday morning, and continue to move rapidly to the northeast. Lingering rain will taper off in the morning, with skies clearing out throughout the day. Strong cold advection and lingering clouds behind the exiting low will keep highs around 60 Wednesday, around 10 degrees below normal. Lows Wednesday night will be in the low 40s as high pressure begins to build at the surface from the northwest.

LONG TERM /THURSDAY THROUGH MONDAY/. High pressure and dry conditions to dominate Thursday through early Friday, with surface ridging from the north and deep subsidence. Below normal temps Thursday slowly rises to near normal by Saturday. Weak return flow develops late Saturday into Sunday, increasing low level moisture and rising temps. Slight chance of rain in the forecast for Sunday, but moisture looks to be pretty limited for anything to develop. Better rain chances return late Monday as return flow develops in earnest, and upper level disturbances approach from the west leading to deep moistening of the air column.

AVIATION /19Z MONDAY THROUGH SATURDAY/. Kind of in a holding pattern until the next system arrives later on Tuesday. Dewpoints will drop into the forties later today as much drier air moves in. Cold temps tonight with a light northwest wind. Increasing clouds on Tuesday as the low approaches.

Extended Outlook . Predominately VFR through Friday. Exception, flight restrictions are possible Tuesday evening thru early Wed.

MARINE. A ridge of high pressure moving across the coastal waters this afternoon is providing light winds. Seas have diminished to around 2 feet, and benign conditions should continue through the night. A dry cold front approaching from the north should arrive late tonight, turning winds northeasterly by Tuesday morning with speeds increasing to around 15 knots.

Low pressure developing across the Deep South will follow this front eastward across Georgia on Tuesday, emerging into the Atlantic off southernmost South Carolina around sunset. Moderate rain with embedded heavier showers or thunderstorms will accompany this system. As the low deepens off the coast, a period of strong northeast winds is expected to develop Tuesday night. Frequent gale- force gusts appear likely across the North Carolina coastal waters, and a Gale Watch has been posted here. A Small Craft Advisory is being posted for the South Carolina coastal waters should winds should generally remain 30 knots or less.

Small Craft conditions likely to continue through Wednesday afternoon, particularly for SE NC coastal waters, as deepening low off the Outer Banks Wednesday morning exits quickly to the northeast. Winds and seas will be decreasing throughout the day, with north winds 25 kts early diminish to 15 kts by Wed night and 4-6 ft seas become 2-4 ft NE SC waters and 3-5 ft SE NC waters. Calm marine conditions expected Thursday into the weekend, with N/NW winds around 10 kts and seas 2-4 ft early Thursday becoming 1-3 ft by Thursday night through Friday night. Seas predominantly a decaying ENE 10 sec swell Wed through Friday night, with a building 15 sec E swell entering the waters Friday night.

ILM WATCHES/WARNINGS/ADVISORIES. SC . None. NC . None. MARINE . Small Craft Advisory from 8 PM Tuesday to 2 PM EDT Wednesday for AMZ254-256. Gale Watch from Tuesday evening through Wednesday morning for AMZ250-252.

SYNOPSIS . ILM 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 13 mi43 min 77°F
NIWS1 - North Inlet-Winyah Bay Reserve, SC 14 mi76 min E 6 78°F 1015 hPa49°F
41024 - Sunset Nearshore (SUN 2) 39 mi53 min SW 7.8 G 9.7 68°F 64°F1015.3 hPa
41119 39 mi41 min 65°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 mi65 minVar 310.00 miFair78°F46°F32%1015.8 hPa
Conway Horry County Airport, SC20 mi66 minN 010.00 miFair77°F42°F30%1015.6 hPa
Georgetown County Airport , SC20 mi66 minW 610.00 miFair81°F41°F24%1016.3 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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Mon -- 12:32 AM EDT     Moonset
Mon -- 03:22 AM EDT     2.84 feet High Tide
Mon -- 07:05 AM EDT     Sunrise
Mon -- 10:42 AM EDT     0.68 feet Low Tide
Mon -- 10:54 AM EDT     Moonrise
Mon -- 03:41 PM EDT     2.31 feet High Tide
Mon -- 07:35 PM EDT     Sunset
Mon -- 10:49 PM EDT     0.53 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.21.92.52.82.82.62.21.81.30.90.70.711.522.32.32.21.91.61.20.80.60.5

Tide / Current Tables for Midway Inlet North, Pawleys Island, South Carolina
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Midway Inlet North
Click for Map
Mon -- 12:01 AM EDT     4.49 feet High Tide
Mon -- 12:32 AM EDT     Moonset
Mon -- 07:01 AM EDT     0.85 feet Low Tide
Mon -- 07:06 AM EDT     Sunrise
Mon -- 10:54 AM EDT     Moonrise
Mon -- 12:20 PM EDT     3.67 feet High Tide
Mon -- 07:08 PM EDT     0.67 feet Low Tide
Mon -- 07:35 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.54.33.83.12.31.510.81.11.82.73.43.63.63.32.821.40.90.70.91.62.73.7

Weather Map
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wmap_A
GEOS 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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Wilmington, NC (16,3,4,5)
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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 numerous 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.