Saturday, June12, 2021
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Marine Weather and Tides
Port Royal, 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 6:14AMSunset 8:31PM Saturday June 12, 2021 10:05 AM EDT (14:05 UTC) Moonrise 6:51AMMoonset 9:41PM Illumination 6% Phase: Waxing Crescent; Moon at 2 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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AMZ352 Waters From Edisto Beach Sc To Savannah Ga Out 20 Nm- 656 Am Edt Sat Jun 12 2021
Today..SW winds 10 to 15 kt. Seas 3 to 4 ft, subsiding to 2 to 3 ft this afternoon. A slight chance of showers and tstms this morning, then showers and tstms likely this afternoon.
Tonight..SW winds 10 to 15 kt, becoming W 5 to 10 kt after midnight. Seas 2 to 3 ft. Showers and tstms likely in the evening, then showers likely with a slight chance of tstms after midnight.
Sun..N winds 5 to 10 kt, becoming ne in the afternoon. Seas 2 to 3 ft. A chance of showers and tstms.
Sun night..NE winds 5 to 10 kt, becoming N after midnight. Seas 2 to 3 ft. A chance of showers and tstms.
Mon..N winds 5 kt, becoming sw in the afternoon. Seas 2 ft. A slight chance of showers and tstms.
Mon night..SW winds 10 kt. Seas 2 ft. A slight chance of showers and tstms.
Tue..SW winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers and tstms.
Tue night..SW winds 15 kt. Seas 3 to 4 ft. A chance of showers and tstms.
Wed..W winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers and tstms.
Wed night..SW winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance of showers and tstms. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 656 Am Edt Sat Jun 12 2021
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A weak cold front will drop in from the north late today. Then another front could approach the region by the middle of next week.


7 Day Forecast for Marine Location Near Port Royal, SC
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location: 32.33, -80.47     debug


Area Discussion for - Charleston, SC
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FXUS62 KCHS 121127 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 727 AM EDT Sat Jun 12 2021

SYNOPSIS. A weak cold front will drop in from the north late today. Then another front could approach the region by the middle of next week.

NEAR TERM /THROUGH TONIGHT/. As of 725 AM: KCLX detected a few clusters of showers with isolated thunderstorms over SE GA and the adjacent waters. This activity should cycle up and down through the rest of the morning. Deeper convection is still expected begin during the early afternoon hours, gradually increasing through the early evening hours. I will update the forecast to adjust hourly PoPs and Wx to align with latest radar trends and HRRR.

As of 440 AM: Latest water vapor images indicated a mid-level trough across the Southeast U.S., with a plume of deep moisture across the area. In addition, a vort max was evident over the Ohio River Valley, diving to the SE. At the sfc, a backdoor cold front extended west to east across NC this morning. The cold front is forecast to slide south through the day, expected to reach the north portions of the SC Lowcountry this evening. GFS indicates that the upstream vort max will rotate over the forecast area late this afternoon and evening. The environment along and south of the front will feature CAPE values between 1000-2000 J/kg with PW values will range between 1.9-2.1 inches. Latest runs of the CAMs indicate that numerous to widespread showers/thunderstorms will develop across forecast area this afternoon, greatest coverage of the SC Lowcountry. During the evening, guidance indicates that a frontal wave will develop off the SC coast, slowing the front and decreasing storm motions. HREF probabilities of 3-hr QPF greater than 3 inches within 40 km peak at 30 percent over the CHS Tri-county this evening. Latest 3-hr FFG across the forecast area generally ranges between 2.5-3.5 inches, which appears possible in some locations under cell mergers. In addition, the peak of the rainfall rates could overlap with high tide between 10-11 PM this evening. A portion of the CWA has been highlighted with a slight risk for excessive rainfall by WPC. The potential for localized excessive rainfall will be highlighted in the HWO.

High temperatures this afternoon are forecast to range around 90 degrees. Tonight, low temperatures are expected to range from around 70 inland to the mid 70s along the coast.

SHORT TERM /SUNDAY THROUGH TUESDAY/. Sunday: A cold front will linger across the area before shifting offshore late while deep troughing helps maintain PWATs around 2.0 inches. While the bulk of the precipitation will largely depend on the timing and placement of the cold front, there could also be convection along the sea breeze and other boundaries that form. Therefore, at least isolated to scattered showers are expected throughout the day and evening. With decent instability in place, thunderstorms will also occur. High temperatures will be slightly cooler than previous days, topping out in the mid 80s. Lows will be in the upper 60s to mid 70s.

Monday and Tuesday: Deeper moisture will slowly shift away from the area and typical summer days are expected. On Tuesday, a cold front will likely move closer to the area. For both days, afternoon/evening showers and thunderstorms will be possible along the sea breeze and any other boundaries that form. High temperatures will be in the mid 80s to low 90s with low 80s along the coast. Low temperatures will be in the 70s.

LONG TERM /TUESDAY NIGHT THROUGH FRIDAY/. A weak cold front is expected to pass through the area mid-week. Then, high pressure should build into the region late week. Isolated to scattered showers and thunderstorms will be possible each afternoon and evening. High temperatures will be in the mid 80s to low 90s each day with low 80s just along the coast. Lows will be in the 60s to 70s.

AVIATION /11Z SATURDAY THROUGH WEDNESDAY/. VFR conditions expected across the terminals this morning. This afternoon and evening, numerous to widespread showers and thunderstorms will develop along and ahead of a backdoor cold front and mid-level disturbance. The environment will feature deep moisture and instability for several hours late this afternoon and evening. It appears that convection will develop near the terminals between 19-20Z at KCHS/JZI and 23-02Z at KSAV, highlighted with TEMPOs for MVFR visibility and gusty winds. Thunderstorm coverage is expected to peak in coverage over the terminals during the early to mid evening hours. Ridging sfc high pressure combined with deep moisture should spread IFR to LIFR ceilings from north to south with drizzle/mist after 6Z Sunday.

Extended Aviation Outlook: Flight restrictions will be possible during afternoon/evening showers and thunderstorms. Otherwise, no concerns.

MARINE. A backdoor cold front will approach the region today, pushing over the marine zone tonight. Winds ahead of the front will remain from the SW between 15-20 kts, shifting from the north behind the front tonight. Speeds tonight may decrease to around 10 kts as an area of weak low pressure develops along the front tonight. Seas are forecast to range between 2-4 ft today, decreasing to 2-3 ft tonight. Numerous to widespread thunderstorms are possible over the near shore waters late this afternoon and evening.

Sunday through Thursday: A northerly flow will prevail on Sunday before shifting to a southerly flow. Winds will be less than 15 knots with seas around 2 to 4 feet.

CHS WATCHES/WARNINGS/ADVISORIES. GA . None. SC . None. MARINE . None.



NEAR TERM . NED SHORT TERM . RAD LONG TERM . RAD AVIATION . NED/RAD MARINE . NED/RAD


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
41033 5 mi58 min W 12 G 18 78°F 78°F1008.4 hPa
ACXS1 - ACE Basin Reserve, SC 16 mi81 min WSW 2.9 78°F 1009 hPa73°F
FPKG1 - 8670870 - Fort Pulaski, GA 31 mi48 min 80°F1009.9 hPa
FBIS1 - Folly Island, SC 39 mi66 min W 6 G 12 78°F 1009.3 hPa (+0.3)
CHTS1 43 mi48 min WNW 4.1 G 13 80°F 81°F1009 hPa

Wind History for Fort Pulaski, GA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Beaufort County Airport, SC10 mi71 minW 1210.00 miOvercast79°F72°F79%1009.1 hPa
Hilton Head Island, Hilton Head Airport, SC14 mi76 minW 10 G 1510.00 miPartly Cloudy79°F73°F84%1009.8 hPa
Beaufort, Marine Corps Air Station, SC17 mi70 minW 12 miOvercast78°F71°F79%1009.2 hPa

Link to 5 minute data for KARW

Wind History from ARW (wind in knots)
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Tide / Current Tables for Fripp Inlet Bridge, South Carolina
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Fripp Inlet Bridge
Click for Map
Sat -- 04:01 AM EDT     0.49 feet Low Tide
Sat -- 06:14 AM EDT     Sunrise
Sat -- 07:51 AM EDT     Moonrise
Sat -- 10:02 AM EDT     5.37 feet High Tide
Sat -- 04:01 PM EDT     0.39 feet Low Tide
Sat -- 08:29 PM EDT     Sunset
Sat -- 10:13 PM EDT     6.65 feet High Tide
Sat -- 10:40 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.93.52.110.50.91.93.24.35.15.45.14.33.21.90.90.40.823.65.16.26.66.4

Tide / Current Tables for Village Creek Cemetery, Morgan River, South Carolina
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Village Creek Cemetery
Click for Map
Sat -- 04:32 AM EDT     0.49 feet Low Tide
Sat -- 06:14 AM EDT     Sunrise
Sat -- 07:51 AM EDT     Moonrise
Sat -- 10:43 AM EDT     5.67 feet High Tide
Sat -- 04:32 PM EDT     0.39 feet Low Tide
Sat -- 08:29 PM EDT     Sunset
Sat -- 10:41 PM EDT     Moonset
Sat -- 10:54 PM EDT     7.02 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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64.63.11.60.60.61.32.53.84.95.55.65.14.12.81.50.50.51.32.84.55.96.87

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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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