Saturday, July11, 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 6:13AMSunset 8:29PM Saturday July 11, 2020 5:14 PM EDT (21:14 UTC) Moonrise 11:46PMMoonset 11:18AM Illumination 61% Phase: Waning Gibbous; Moon at 21 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- 302 Pm Edt Sat Jul 11 2020
Through 7 pm..S winds 10 kt. Seas 2 to 3 ft.
Tonight..SW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. Isolated showers and tstms in the late evening and early morning.
Sun..SW winds 5 to 10 kt, becoming S 10 to 15 kt in the afternoon. Seas 2 to 3 ft.
Sun night..SW winds 10 to 15 kt. Seas 3 to 4 ft. Isolated showers and tstms.
Mon..SW winds 10 to 15 kt. Seas 3 to 4 ft. Isolated showers and tstms in the morning, then a chance of showers and tstms in the afternoon.
Mon night..SW winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers and tstms.
Tue..SW winds 5 to 10 kt, becoming S in the afternoon. Seas 3 to 4 ft. A chance of showers and tstms in the morning.
Tue night..S winds 5 to 10 kt. Seas 2 to 3 ft.
Wed..S winds 5 to 10 kt. Seas 2 ft.
Thu..S winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms through the day. Winds and seas higher in and near tstms.
AMZ200 302 Pm Edt Sat Jul 11 2020
Synopsis for coastal waters from surf city north carolina to south santee river south carolina out to 20 nautical miles.. A weak trough will stall across the area through the weekend, with high pressure remaining far off the southeast u.s. Coast through 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 111848 AFDILM

Area Forecast Discussion National Weather Service Wilmington NC 248 PM EDT Sat Jul 11 2020

SYNOPSIS. A weak stationary front will impact the area through the weekend. The front will generally move closer to the coast late at night and in the mornings, before retreating inland during the afternoons. Another weak front is expected to impact the area early next week. Bermuda high pressure will dominate the middle and late part of the week.

NEAR TERM /THROUGH SUNDAY NIGHT/. Deep westerly flow is keeping a well-defined sea breeze front relatively close to the coast this afternoon. Visible satellite imagery shows enhanced cumulus building along the boundary, and a few showers have begun to pop up over southeast Brunswick county. A weak stationary boundary is analyzed across the Pee Dee, but convergence along it is weak. Therefore expect the potential for widely scattered showers and thunderstorms to remain mainly along the sea breeze front. Once convection dissipates after sunset, expect mostly clear skies with temps falling to the lower 70s inland to mid 70s along the coast.

Mid-level flow will take on more of a southwesterly trajectory on Sunday, but remain quite dry above 700 mb. High temperatures will range from the mid 90s inland to around 90 at the beaches. This will result in moderate instability but little forcing away from the sea breeze. Will keep PoPs confined to around 20 percent, mainly east of I-95. Any convection that does develop should die off after sunset, and southerly flow around Bermuda high will keep dewpoints up into the mid 70s, resulting in a muggy Sunday night.

SHORT TERM /MONDAY THROUGH TUESDAY NIGHT/. Small disturbance aloft will bring increased coverage for showers and thunderstorms Monday, but will bring little in way of relief from the heat. Heat indices across the area will still be near to in excess of 100. Upper disturbance moves offshore Tuesday, but chances for afternoon showers and thunderstorms continue along the sea breeze during the peak heating times of the afternoon. Weak ridge of high pressure will keep hot and humid conditions around through mid week.

LONG TERM /WEDNESDAY THROUGH FRIDAY/. Hot and humid conditions with afternoon showers and thunderstorms developing each day from mid week into next weekend. Little activity in the upper level flow pattern to spark a pattern change with jet stream well to the north and upper level ridge pattern over the Carolinas heading into the end of the week. High temperatures in the low to mid 90s is near to slightly above normal for mid July.

AVIATION /18Z SATURDAY THROUGH THURSDAY/. Overall, VFR conditions are expected to continue throughout the 18Z TAF period. Convection could develop this afternoon along the seabreeze front at the coast. Best potential (30 percent) for impact on an airport is expected at KILM, KCRE, and KMYR where brief MVFR to IFR conditions are possible. A 20 percent chance or less is expected elsewhere. Showers/storms cease by the evening hours. Some model guidance shows MVFR fog building in during the pre- dawn hours Sunday morning, but plenty of uncertainty as to where it sets up, if it does at all. Confidence is leaning towards the coast at this time, represented by TEMPO groups. Any fog that sets up should mix out by 12-13Z. Winds should be calm throughout Sunday morning, and seabreeze initiates again towards the end of the period.

Extended Outlook . Diurnal convection will continue, especially near the coast, with brief MVFR to IFR conditions expected through the weekend. Increased risk of flight restrictions on Monday, before seeing more of a VFR trend through mid next week.

MARINE. Through Sunday night . Bermuda high pressure along with a weak surface trough laying across the eastern Carolinas will maintain generally SSW flow across the waters. The trough may slip just offshore later tonight and into the morning hours Sunday, which would result in some variability in the wind direction, although speeds are expected to be 10 kt or less. The trough will push inland during the day Sunday, with SSW flow becoming established through Sunday night. Seas will run 2-3 ft through the period, composed of a 2-3 ft SE swell around 8 seconds, and a one ft SSW wind wave around 4 seconds. Development of widely scattered showers and thunderstorms will be possible overnight Sunday night.

Through Next Friday . Southerly wind fetch to develop south of the Carolina coastal waters into Monday as offshore high pressure interacts with front in the area. Seas between 4 and 5 feet from the south at 8 seconds could cause concern for smaller vessels and inexperienced mariners with SSW winds at 20 kts. Pressure gradient weakens into Tuesday as front drifts close to or just offshore the coast, allowing winds/seas to come down at or below 15kt/4ft. Calmer conditions look likely heading into the end of next week into the weekend with seas 2 to 3 feet with components from the south at 5 seconds and the southeast between 8 and 10 seconds with south winds at or under 10 kts with gusts to 15 at times.

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

SYNOPSIS . ILM NEAR TERM . CRM SHORT TERM . MK LONG TERM . MK AVIATION . IGB MARINE . CRM/MK


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MROS1 - 8661070 - Springmaid Pier, SC 13 mi57 min 85°F
NIWS1 - North Inlet-Winyah Bay Reserve, SC 14 mi90 min SSE 11 86°F 1008 hPa80°F
41024 - Sunset Nearshore (SUN 2) 39 mi67 min SSW 12 G 14 85°F 88°F1009.1 hPa
41119 39 mi58 min 88°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 mi79 minSE 910.00 mi87°F79°F77%1009.2 hPa
Conway Horry County Airport, SC20 mi80 minN 010.00 miFair91°F73°F56%1009.1 hPa
Georgetown County Airport , SC20 mi80 minSSW 910.00 mi86°F77°F75%1009.1 hPa

Link to 5 minute data for KMYR

Wind History from MYR (wind in knots)
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Last 24hrS9S12S8S10SW5SW5S5S4SW7SW5NW8N8SE3CalmS3SW5W53S3SE9SE10SE10SE9S10
1 day agoNW7E4W4NW3NW3NW3NW5NW4W3NW5N3NW6N4N3NW3CalmSE3SE5CalmSE3S8SE11S10S9
2 days ago4CalmS3N4NW3NW4NW4N4N6N5NE5N6N5N9N6NW8N9N12NW10NW12
G17
NW10NW11NW9NW5

Tide / Current Tables for Wachesaw Landing, Waccamaw River, South Carolina
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Wachesaw Landing
Click for Map
Sat -- 12:18 AM EDT     Moonrise
Sat -- 04:11 AM EDT     2.69 feet High Tide
Sat -- 06:15 AM EDT     Sunrise
Sat -- 11:13 AM EDT     0.45 feet Low Tide
Sat -- 12:17 PM EDT     Moonset
Sat -- 04:39 PM EDT     2.49 feet High Tide
Sat -- 08:28 PM EDT     Sunset
Sat -- 11:28 PM EDT     0.91 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.11.62.12.52.72.62.41.91.510.60.50.61.11.62.12.42.52.32.11.71.41.10.9

Tide / Current Tables for Midway Inlet North, Pawleys Island, South Carolina
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Midway Inlet North
Click for Map
Sat -- 12:18 AM EDT     Moonrise
Sat -- 12:50 AM EDT     4.27 feet High Tide
Sat -- 06:15 AM EDT     Sunrise
Sat -- 07:32 AM EDT     0.56 feet Low Tide
Sat -- 12:17 PM EDT     Moonset
Sat -- 01:18 PM EDT     3.94 feet High Tide
Sat -- 07:47 PM EDT     1.14 feet Low Tide
Sat -- 08:28 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.14.343.42.61.81.10.60.61.22.133.63.93.93.52.92.21.61.21.21.52.33

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 (17,4,5,8)
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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 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.