Saturday, December7, 2019
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Marine Weather and Tides
Myrtle Beach, SC

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:05AMSunset 5:08PM Saturday December 7, 2019 2:30 AM EST (07:30 UTC) Moonrise 2:35PMMoonset 2:31AM Illumination 78% Phase: Waxing Gibbous; Moon at 10 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- 918 Pm Est Fri Dec 6 2019
.small craft advisory in effect from 6 am est Saturday through late Saturday night...
Overnight..NE winds 10 kt, increasing to 10 to 15 kt late. Seas 1 foot, then 2 ft. A chance of showers this evening, then a slight chance of showers.
Sat..NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft.
Sat night..NE winds 15 to 20 kt. Seas 3 to 4 ft.
Sun..NE winds 10 to 15 kt, becoming se. Seas 3 to 4 ft. A chance of showers.
Mon..SW winds 10 to 15 kt. Seas 4 to 5 ft. A chance of showers through the day.
Tue..SW winds 10 to 15 kt. Seas 4 to 5 ft. A chance of showers.
AMZ200 918 Pm Est Fri Dec 6 2019
Synopsis for coastal waters from surf city north carolina to south santee river south carolina out to 20 nautical miles.. A cold front will move across the waters late tonight. Increasingly rough seas are expected to develop next week as a coastal low develops offshore.


7 Day Forecast for Marine Location Near Myrtle Beach, SC
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location: 33.68, -78.89     debug


Area Discussion for - Wilmington, NC
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FXUS62 KILM 070654 AFDILM

Area Forecast Discussion National Weather Service Wilmington NC 154 AM EST Sat Dec 7 2019

SYNOPSIS. A cold front will bring light rain tonight, followed by cooling and drying into the weekend. Noticeable warming to follow Monday and Tuesday ahead of a cold front Tuesday night.

UPDATE. Radar and mesonet obs show measurable rain still occurring from Whiteville east to Wilmington. Radar returns south of Florence are generally virga or sprinkles. New shallow convective showers could appear now through ~11pm near the coast from MYR through Southport, but otherwise PoPs are ramping down as the lift begins to move offshore.

NEAR TERM /THROUGH SUNDAY/. Trace amounts of rain approaching I-95, as virga gradually makes inroads to the surface. Nightfall, or shortly thereafter, light rain will reach farther east by the coast, as column RH increases from the virga. Moisture depth, and longevity of this feature over the area, will equate to system rain totals of .05-0.15 with isolated totals of 1/4-1/3 inch, rain edging off the coast after 6-7z.

Meager CAPE aloft this evening, limited moisture, low wind shear, and surface stability, should team-up to prevent any TSTMS tonight.

Drying, breezy, cooler into Saturday, gusts to 25 mph at the coast at times, 55-60 max-T expected, 60 most likely to be reached over the NE SC interior. Other than fleeting cirrus, plenty sunshine set for Saturday. After a peak in dewpoints of around 50 this evening, Td will drop off to near 40 Saturday. 10-meter wind average over land to remain at 10 knots or higher through Saturday evening.

SHORT TERM /SUNDAY NIGHT/. Surface high pressure wedge to hold intact on Sunday whilst a developing warm front stalls along the coast. The light rain that breaks out as a result of the isentropic lift appears to largely hold off until Sunday night. When the rain does move in it will tend to favor coastal areas both with respect to POPs and QPF. Sunday will be quite seasonable despite the increasing clouds whereas the same clouds will diminish the diurnal curve for a mild night.

LONG TERM /MONDAY THROUGH FRIDAY/. Deep layer southwesterly flow will lead to a considerable warmup Monday and Tuesday, bolstered by the approach of a cold front on Tuesday. A few showers may precede the boundary later Tuesday but most of the rain will come Tuesday night with its arrival. Diurnal timing not very favorable for thunder but strong dynamics may offset weak instability. Have left out though at this point. Post FROPA cool advection will bring a seasonable Wednesday and a chilly Thursday. Weak warm advection appears to materialize as early as Friday.

AVIATION /06Z SATURDAY THROUGH WEDNESDAY/. The last of the Pcpn and associated low clouds have moved off the mainland of the Carolinas and will continue to pull further east, away from the local area this morning. Mid and upper level SCT/BKN clouds will also scour out as they move across the Eastern Carolinas and off the coasts. The sfc cold front is nearly overhead with light NW-N winds less than 5 kt. Potentially could see calm winds early this morning which could give rise to fog and at the moment will include a tempo group between 08z-12z for all terminals and indicate BR in a range from 6sm to 2sm. The CAA surge along with tightening of the sfc pg developing from ridging of a 1030+ high pressure in the wake of the CFP, will combine to produce NE 10-15 kt with Gusts up to 20kt from 14Z thru 23Z. Drying conditions thru the atm column with some residual low level moisture could result in FEW/SCT diurnally driven Cu during daylight today, however confidence remains low and will just mention it's possibility here.

Extended Outlook . VFR Sat night into Sun. Brief periods of MVFR/IFR possible Sun afternoon into Mon as a coastal front pushes onshore . and during Tuesday due to a cold frontal passage. Expect VFR by mid-week.

MARINE. In wake of cold frontal passage tonight, stiff NNE-NE winds expected Saturday and Saturday night, prompting SCA flags for frequent gusts between 25-30 knots. Visibility should not suffer a great deal, with mainly light rain this evening. Weak south wind-waves tonight, will transition to steep and hazardous NE waves Saturday, with dominant wave periods Saturday 6-7 seconds. Latest numerical wave guidance shows buoy 41013, Frying Pan Shoals, reaching and holding at 6 feet much of Saturday night. NO TSTMs expected over the inshore waters tonight. Current near shore water temperatures ranging from 54-58, and as such, mariners should be equipped anti-hypothermia gear and clothing in case of overboard situations.

High pressure over land on Sunday while a warm front pushes into the coastal waters. Winds will veer and ease some in speed but some advisory-worthy 6 ft seas still appear possible, generally only off NC coast. Southwesterly flow will then be in place Monday and Tuesday as both a large area of high pressure sits off the coast and a cold front approaches from the west. The gradient could remain strong enough to maintain near advisory level seas again mainly for our NC zones. An abrupt wind shift early Tuesday night heralds the arrival of the front. Northerly winds on WEdnesday may finally lighten enough and cause enough wave shadowing for any advisories to drop.

ILM WATCHES/WARNINGS/ADVISORIES. SC . None. NC . None. MARINE . Small Craft Advisory from 6 AM this morning to 6 AM EST Sunday for AMZ250-252-254-256.

SYNOPSIS . ILM UPDATE . TRA NEAR TERM . 08 SHORT TERM . mbB LONG TERM . mbB AVIATION . DCH MARINE . mbB/08/TRA


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MROS1 - 8661070 - Springmaid Pier, SC 2 mi60 min 52°F
41024 - Sunset Nearshore (SUN 2) 24 mi82 min NNE 7.8 G 9.7 53°F 56°F1021.8 hPa
41119 24 mi40 min 56°F1 ft
NIWS1 - North Inlet-Winyah Bay Reserve, SC 28 mi105 min NE 5.1 55°F 1021 hPa53°F
41108 46 mi60 min 58°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, SC2 mi34 minN 010.00 miOvercast52°F50°F93%1021.8 hPa
North Myrtle Beach Grand Strand Airport, SC13 mi37 minN 010.00 miOvercast52°F50°F93%1021.6 hPa
Conway Horry County Airport, SC16 mi35 minN 07.00 miMostly Cloudy46°F46°F100%1022 hPa

Link to 5 minute data for KMYR

Wind History from MYR (wind in knots)
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Last 24hrCalmCalmCalmN3NW4NW5NW4N4N3SE6SE4E3E3CalmSW5N3N5N4N3CalmCalmCalmN4Calm
1 day agoW8W7W7NW7NW10NW10NW10N14
G19
N9NW4W54SE6S5S4CalmCalmCalmCalmCalmN3CalmCalmCalm
2 days agoW5SW5W3W6W5W7W5NW8NW9NW6W6W10SW9W8SW6W5W5W6SW4W8W12W10W7W7

Tide / Current Tables for Myrtle Beach, South Carolina
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Myrtle Beach
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Sat -- 02:31 AM EST     Moonset
Sat -- 03:35 AM EST     4.63 feet High Tide
Sat -- 07:06 AM EST     Sunrise
Sat -- 09:56 AM EST     0.95 feet Low Tide
Sat -- 02:34 PM EST     Moonrise
Sat -- 03:56 PM EST     4.58 feet High Tide
Sat -- 05:06 PM EST     Sunset
Sat -- 10:08 PM EST     0.38 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.13.144.54.64.13.42.51.71.111.21.82.73.64.34.64.33.52.51.40.70.40.6

Tide / Current Tables for Socastee Bridge, ICWW, South Carolina
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Socastee Bridge
Click for Map
Sat -- 02:32 AM EST     Moonset
Sat -- 02:36 AM EST     0.40 feet Low Tide
Sat -- 07:07 AM EST     Sunrise
Sat -- 07:26 AM EST     1.91 feet High Tide
Sat -- 02:35 PM EST     Moonrise
Sat -- 03:05 PM EST     0.58 feet Low Tide
Sat -- 05:07 PM EST     Sunset
Sat -- 07:48 PM EST     1.84 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.80.60.40.40.71.21.61.91.91.81.61.31.10.80.70.60.71.11.51.81.81.81.61.3

Weather Map
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wmap_A
GEOS Local Image of    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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Wilmington, NC (2,6,7,8)
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Ground Weather Radar Station Wilmington, NC
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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 numerious 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.