Monday, February24, 2020
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Marine Weather and Tides
Myrtle Beach, 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 6:48AMSunset 6:08PM Monday February 24, 2020 4:39 AM EST (09:39 UTC) Moonrise 7:41AMMoonset 7:09PM Illumination 1% Phase: New Moon; Moon at 1 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- 248 Am Est Mon Feb 24 2020
Today..E winds 5 kt, increasing to 10 kt late. Seas 2 ft. A chance of rain late.
Tonight..SE winds 10 to 15 kt. Seas 3 to 4 ft. Rain. Vsby 1 to 3 nm after midnight.
Tue..SW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Showers likely, mainly in the morning. Patchy fog in the afternoon. Vsby 1 to 3 nm.
Tue night..SW winds 10 to 15 kt, diminishing to 10 kt after midnight. Seas 4 to 5 ft. Showers likely.
Wed..SW winds 10 to 15 kt, becoming W 15 to 20 kt. Seas 3 to 4 ft. A chance of showers through the day.
Thu..W winds 10 to 15 kt. Seas 2 to 3 ft.
Fri..W winds 10 to 15 kt. Seas 2 to 3 ft.
AMZ200 248 Am Est Mon Feb 24 2020
Synopsis for coastal waters from surf city north carolina to south santee river south carolina out to 20 nautical miles.. Low pressure to our west will lift a warm front across the area tonight. A cold front will follow for Wednesday. High pressure will build in from the west late in the week.


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 240801 AFDILM

Area Forecast Discussion National Weather Service Wilmington NC 301 AM EST Mon Feb 24 2020

SYNOPSIS. Storm system over the central US will bring warm temperatures and rain chances to the Carolinas tonight into Tuesday morning. Well- above normal temperatures expected on Tuesday with rain chances lingering along the immediate coast. A cold front moving through the region on Wednesday night will usher in below-normal temperatures and dry conditions for Thursday and continuing into early next week.

NEAR TERM /THROUGH TUESDAY/. Surface low pressure will move from Oklahoma across Missouri later today, then into Indiana on Tuesday. A warm front lifting north well ahead of this low is expected to move across the Carolinas tonight.

The real action over the next 24 hours occurs above the surface as Gulf moisture is advected north across the Carolinas. The feed of Gulf moisture is already established and has led to an increase in mid and high cloud cover early this morning. This moisture should develop downward to meet increasing isentropic lift on the 300K surface (located approximately 9000 feet AGL) by early afternoon inland, spreading down to the coast during the late afternoon hours. Look for rain to break out with chances increasing to 80-100 percent inland. The best chance for rain at the coast should occur after midnight as a second wave of lift associated with the warm front develops across the area. PoPs have been increased to 80-100 percent area wide tonight with peak chances expected during the midnight to 5 AM Tuesday timeframe.

Precipitation should taper off Tuesday morning from west to east as drier mid-level air temporarily advects in. The warm front should lift north of our portion of the Carolinas on Tuesday, and with just a touch of sunshine high temperatures are expected to exceed 70 degrees in some locations away from the beaches.

SHORT TERM /TUESDAY NIGHT THROUGH WEDNESDAY NIGHT/. Low pressure will track over the central US and occlude over the upper midwest causing it to become nearly stationary over southwestern Michigan Tuesday night. The cold front associated with this system will slow its forward momentum as it approaches the Appalachian mountains. With the cold front positioned to the west of the forecast area and southerly flow providing deep moisture and veering wind profiles, rain chances will remain high Tuesday night into Wednesday. Temperatures will also soar into the upper 60s within the warm moist air advection ahead of the front on Wednesday. There is a slight chance of a thunderstorms during the late afternoon hours, but with such weak instability, the possibility remains low and only warrants a brief mention here. During the day on Wednesday, upper-level trough dips southward over the central US and will spark the redevelopment of a secondary surface low. This second low pressure system will push eastward with the upper-level trough and finally push the lagging cold front through the area Wednesday night.

LONG TERM /THURSDAY THROUGH SUNDAY/. Cold, dry air advection will build into the eastern half of the CONUS on Thursday. With cold air in place, temperatures will run below normal Thursday through the weekend. A shortwave develops along the base of the trough and swings through the Carolinas Thursday night into Friday. Deep layer moisture will be very limited and as such the forecast calls for mid-level clouds to limit overnight low temperatures, but mentions no other impacts. Cold air continues to make an advance southward into the weekend as high pressure pushes over the southern Plains on Saturday. This is likely to be the coldest day of the next 7 with arctic high pressure keeping highs around 50. Another shortwave rounds the deepening upper-level trough on Saturday afternoon. This will have slightly more moisture associated with it, so we are likely to see clouds increase throughout the day (possibly limiting high temperatures) with a slight chance of some afternoon precipitation. At the moment, low-level moisture would limit the possibility of seeing any precip as dry air continues to stifle falling hydrometeors. Clearing skies Saturday night into Sunday morning will again, limit low temperatures so that no hard freeze is expected. Slightly warmer day on Sunday with high pressure building into the area under clear skies. On Monday, we return into a zonal upper-level flow as the upper-level trough, stationary for what could be nearly a week, moves eastward. Near-normal temperatures are likely to result with a few clouds despite high pressure overhead.

AVIATION /08Z MONDAY THROUGH FRIDAY/. Moisture will lower throughout the day as a warm front approaches from the south. MVFR ceilings should first develop inland at FLO and LBT around or shortly after 18z, spreading down to the coast a few hours later. IFR ceilings will become likely by sunset, especially north and west of the two Myrtle Beach airports. Light rain may become a little more substantial after dark with visibility restrictions developing as well.

Extended Outlook . The approach and passage of a cold front will maintain the potential of MVFR/IFR conditions through Wednesday morning. Otherwise VFR afterwards.

MARINE. High pressure will retreat farther away from the East Coast today as low pressure deepens across the central Plains states. A warm front extending eastward from the low will move slowly northward across Georgia and southern South Carolina today, advancing into our portion of the Carolinas late tonight. Light and variable winds ahead should become southerly late tonight as the front lifts north, increasing to 15-20 knots by daybreak. Winds could exceed 20 knots at times on Tuesday as the low moves into the southern Great Lakes.

Forecast issues for today concern what (if any) wind direction will be dominant in the weak pressure gradient that exists north of the developing warm front. Once the front lifts across the area tonight and southerly winds strengthen, Small Craft Advisory conditions may develop through the day Tuesday. There is also a potential of some sea fog on Tuesday as humid air overspreads the Carolinas.

Southwesterly winds ahead of an approaching cold front will bring 15- 20 knots with gusts to 25 knots and seas to near 6 feet Tuesday night into Wednesday. After the front pushes out to sea, winds will become offshore and allow seas to decrease to 3-5 feet with an occasional 6 while also increasing wave periods slightly. High pressure builds throughout the day on Thursday and near-advisory levels dissipate in westerly winds 10-15 knots. Quiet conditions continue into Friday before high pressure builds southward over the central US increasing the pressure gradient over the Carolinas, leading to elevated winds and seas on Saturday.

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



SYNOPSIS . ILM NEAR TERM . TRA SHORT TERM . 21 LONG TERM . 21 AVIATION . TRA MARINE . TRA/21


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MROS1 - 8661070 - Springmaid Pier, SC 2 mi51 min 53°F
41024 - Sunset Nearshore (SUN 2) 24 mi31 min SE 1.9 G 3.9 52°F 53°F1020.4 hPa
41119 24 mi109 min 53°F2 ft
SSBN7 24 mi47 min
NIWS1 - North Inlet-Winyah Bay Reserve, SC 28 mi54 min Calm 51°F 1019 hPa48°F
41108 46 mi69 min 53°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 mi43 minN 010.00 miOvercast51°F44°F77%1020 hPa
North Myrtle Beach Grand Strand Airport, SC13 mi46 minN 010.00 miOvercast50°F46°F89%1019.8 hPa
Conway Horry County Airport, SC16 mi64 minN 010.00 miMostly Cloudy46°F42°F87%1020 hPa

Link to 5 minute data for KMYR

Wind History from MYR (wind in knots)
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Last 24hrN4CalmN3CalmCalmCalm35SE7S7SE7SE5SE4SE3CalmCalmS4S4CalmCalmSW4SW3SW3Calm
1 day agoN4NW5N4N7N7N8N8CalmSE5S6S5S7S6S3CalmCalmCalmN3CalmCalmCalmCalmCalmNW3
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Tide / Current Tables for Myrtle Beach, South Carolina
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Myrtle Beach
Click for Map
Mon -- 01:49 AM EST     -0.28 feet Low Tide
Mon -- 06:50 AM EST     Sunrise
Mon -- 07:40 AM EST     Moonrise
Mon -- 08:02 AM EST     5.14 feet High Tide
Mon -- 02:13 PM EST     -0.16 feet Low Tide
Mon -- 06:07 PM EST     Sunset
Mon -- 07:09 PM EST     Moonset
Mon -- 08:09 PM EST     4.68 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.8-0-0.30.21.22.63.94.85.14.942.81.40.4-0.10.10.92.13.44.34.74.53.82.7

Tide / Current Tables for Socastee Bridge, South Carolina
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


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 (4,6,7,8)
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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.