Friday, December6, 2019
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Marine Weather and Tides
Ridgeland, 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 7:08AMSunset 5:19PM Friday December 6, 2019 3:40 PM EST (20:40 UTC) Moonrise 2:14PMMoonset 1:46AM Illumination 74% 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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AMZ352 Waters From Edisto Beach Sc To Savannah Ga Out 20 Nm- 325 Pm Est Fri Dec 6 2019
.small craft advisory in effect from Saturday evening through Sunday afternoon...
Tonight..N winds 5 to 10 kt. Seas 2 ft. A slight chance of showers this evening.
Sat..N winds 10 to 15 kt, becoming ne 15 to 20 kt in the afternoon. Seas 2 to 3 ft, building to 3 to 4 ft in the afternoon.
Sat night..NE winds 20 kt with gusts to 25 kt. Seas 4 to 5 ft, building to 4 to 6 ft after midnight.
Sun..NE winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 6 ft. A slight chance of showers in the afternoon.
Sun night..NE winds 15 to 20 kt, becoming se 5 to 10 kt after midnight. Seas 3 to 4 ft. A slight chance of showers.
Mon..S winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 3 to 4 ft. A slight chance of showers.
Mon night..SW winds 15 kt with gusts to 20 kt. Seas 4 to 5 ft.
Tue..SW winds 15 to 20 kt. Seas 4 to 5 ft. A slight chance of showers.
Tue night..W winds 15 to 20 kt. Seas 3 to 4 ft. A chance of showers.
Wed..N winds 15 to 20 kt. Seas 3 to 4 ft. A slight chance of showers.
Wed night..N winds 15 to 20 kt. Seas 3 to 4 ft.
AMZ300 325 Pm Est Fri Dec 6 2019
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A weak disturbance will move through today. High pressure will build from the northwest tonight through Sunday. A warm front will lift north of the region Monday, before a cold front sweeps through the area late Tuesday. Strong high pressure will then return Wednesday through Friday.


7 Day Forecast for Marine Location Near Ridgeland, SC
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location: 32.41, -80.89     debug


Area Discussion for - Charleston, SC
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FXUS62 KCHS 061752 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 1252 PM EST Fri Dec 6 2019

SYNOPSIS. High pressure will move away today, with a stronger high to build from the north tonight and prevail through the weekend. A warm front will lift north of the region Monday, before a cold front sweeps through the area late Tuesday. Strong high pressure will then return Wednesday through Friday.

NEAR TERM /THROUGH TONIGHT/. Update: Satellite indicates thicker clouds rolling in from the west, which is limiting temperature rises inland. Closer to the coast, where there are more breaks in the clouds, temperatures have already topped the 70 degree mark in some locations. We made adjustments to the high temperatures and the hourly trends to account for this. The new synoptic models seemed to have backed off a bit on the rainfall potential this afternoon. This makes sense given most of the radar returns approaching from the west aren't reaching the ground. We lowered the POPs a bit, but wouldn't be surprised if we have to go further. QPF should generally be <0.01". Otherwise, the short wave continues to move eastward and deamplify, reaching GA early this evening.

Tonight: The disturbance aloft will shift quickly offshore with surface high pressure building from the north overnight. There will be some lingering mid level clouds through the night while lower levels tend to dry further after midnight. There could be some patchy fog along coastal areas or where and light rains fell but nothing significant anticipated. Low temps should average out in the lower to mid 40s from north to south.

SHORT TERM /SATURDAY THROUGH MONDAY/. Saturday: A zonal west to northwest flow will develop aloft, as surface high pressure initially over the Ohio Valley and eastern Great lakes traverses east through the day. The high will extend south as it builds overhead, and becomes sandwiched between two weak areas of low pressure; one a few hundred miles off the coast and another in the northern Gulf of Mexico. The air mass is void of any deep moisture, and that along with the lack of forcing should keep us rainfree. There's enough insolation and downslope flow above the boundary layer to support max temps in the lower and middle 60s inland from the coast. Lows Saturday night will be close to climo, as the high to the north strengthens further and develops into an inland wedge over the Southeast. North and northeast breezes through the period will increase to between 20 and 25 mph at times, especially along the coastal corridor as the gradient tightens between the inland high and a baroclinic zone offshore.

Sunday: Even though the parent high will pull off the coast of New England, the inland wedge will intensify as an inverted trough or warm front sharpens off the coast. Moisture steadily increases, and as isentropic ascent strengthens and we are nearby to the offshore trough, we look for isolated to perhaps scattered showers near and east of I-95 in South Carolina. Considerable moisture is trapped beneath the wedge inversion and with neutral or weak warm advection, temps will be several degrees cooler than on Saturday. Those gusty northeast breezes will again prevail between the inland wedge of high pressure and the offshore trough.

Monday: While there is a zonal west-southwest flow aloft, at the surface the pre-existing trough/warm front will have lifted to the north. The local region will become situated between a huge oceanic high that extends across Florida into the Gulf, and an upstream cold front that trails from a low in the western Great Lakes region to southeast Texas. The best chance of showers will be off to the north- northeast near the warm front and to the distant west-northwest in association with the cold front. Impressive warm advection will occur as H85 temps peak at 11-12C or between the 75th and 90th percentile for this time of year. So despite plenty of cloud cover, max temps will climb far above normal, with a huge range from the cooler coast to the warmer inland sections.

LONG TERM /MONDAY NIGHT THROUGH FRIDAY/. The mid and upper trough will amplify to our west early next week, allowing for a cold front to approach from the west late Tuesday, which will likely pass through Tuesday night. There remain enough timing differences between the global models to not show anything higher than chance PoP ahead of the front, but higher chances will be required at we draw closer to the event. Any t-storm risk is too low to include this far in advance. Confidence is excellent that it'll be unseasonably warm, with H85 temps as great as 12-13C Tuesday.

Behind the cold front a large and robust high pressure system with dry and colder weather will dominate the local vicinity Wednesday and Thursday, before it gives way to another upstream cold front late in the week. An extended period of breezy to windy conditions will prevail through the period with large pressure rises and a tight gradient around the high.

AVIATION /18Z FRIDAY THROUGH WEDNESDAY/. 18Z TAFs: CHS: Radar shows light showers approaching from the west and models indicate the potential of VCSH at the terminal from ~22-01Z. We're maintaining mention of this in the TAF. Though, the probabilities of MVFR during this time remains low. Conditions improve after 01Z, with VFR expected.

SAV: Light showers could approach the terminal later this afternoon through early this evening. However, the probabilities of any flight restrictions are too low to mention in the TAF, so we are maintaining VFR.

Extended Aviation Outlook: The potential exists for flight restrictions late tonight into Saturday morning before strong high pressure builds in from the north. Another round of flight restrictions is possible Saturday night into Sunday as a wedge of high pressure exists across the area. Additional sub-VFR weather could occur late Tuesday as SHRA develops in association with a cold front next week.

MARINE. Today: A weak pressure pattern across the waters. Winds speeds mainly 10 kt or less with a good amount of directional variability. Seas will continue in the 1-2 ft range.

Tonight: Weak winds in the evening should pick up a bit late as high pressure to the north begins to build in. Around daybreak on Saturday, NNE winds may be up as high as 15 kt with seas increasing to 2-4 ft, highest beyond 20 NM.

Saturday through Sunday; Conditions will steadily deteriorate across the local waters as high pressure builds from the north and develops into a wedge across inland areas of the southeast. At the same time there will be the gradual formation of a nearby trough or warm front that strengthens later Saturday night and Sunday. The resulting packing of the isobars between these two systems will lead to the raising of Small Craft Advisories. Since this won't happen until late in the 3rd period of the forecast, we have opted not to hoist the advisory just yet. Nevertheless, mariners can expect N-NE winds as high as 20-25 kt and gusty, with the resulting seas building to as high as 6 to 8 ft.

Monday through Wednesday: The warm front offshore will pass to the north early Monday, is replaced by extensive Atlantic high pressure into early Tuesday, before giving way to a cold front late Tuesday. behind that front will be another strong area of continental high pressure that returns. Additional Small Craft Advisories are possible.

Sea Fog: Conditions still point to at least a chance of sea fog on Monday as temps and dew points climb greater than the underlying waters. Should this occur the most likely time frame would be Monday within a favorable S-SW fetch and before winds increase too much. Confidence is not yet supportive of adding mention to the forecast, nor to the Hazardous Weather Outlook.

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

NEAR TERM . SHORT TERM . LONG TERM . AVIATION . MARINE .


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ACXS1 - ACE Basin Reserve, SC 25 mi56 min Calm 64°F 1021 hPa59°F
FPKG1 - 8670870 - Fort Pulaski, GA 26 mi59 min E 2.9 G 2.9 62°F 57°F1021.5 hPa
41033 27 mi33 min N 5.8 G 7.8 59°F 59°F1021.9 hPa
FBIS1 - Folly Island, SC 56 mi41 min NNE 2.9 G 4.1 59°F 1021.6 hPa (-1.2)56°F

Wind History for Fort Pulaski, GA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Beaufort, Marine Corps Air Station, SC10 mi45 minNNW 510.00 miMostly Cloudy67°F53°F61%1021.7 hPa
Beaufort County Airport, SC14 mi46 minN 05.00 miMostly Cloudy with Haze63°F53°F73%1021.3 hPa
Hilton Head Island, Hilton Head Airport, SC17 mi51 minN 010.00 miMostly Cloudy66°F53°F64%1021.7 hPa

Link to 5 minute data for KNBC

Wind History from NBC (wind in knots)
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Last 24hrCalmSW3CalmCalmCalmCalmCalmCalmCalmCalmCalmNW3CalmN4CalmN3NW3CalmNE6E6SE6CalmN5NW5
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Tide / Current Tables for Broughton Point, Hazzard Creek, Broad River, South Carolina
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Broughton Point
Click for Map
Fri -- 01:45 AM EST     Moonset
Fri -- 04:44 AM EST     6.93 feet High Tide
Fri -- 07:10 AM EST     Sunrise
Fri -- 11:00 AM EST     1.21 feet Low Tide
Fri -- 02:14 PM EST     Moonrise
Fri -- 05:10 PM EST     6.91 feet High Tide
Fri -- 05:17 PM EST     Sunset
Fri -- 11:27 PM EST     0.69 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.62.84.35.76.76.96.35.13.82.61.61.21.62.53.95.26.46.96.65.74.42.91.60.8

Tide / Current Tables for Hwy. 170 bridge, Broad River, South Carolina
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Hwy. 170 bridge
Click for Map
Fri -- 01:45 AM EST     Moonset
Fri -- 04:01 AM EST     6.68 feet High Tide
Fri -- 07:10 AM EST     Sunrise
Fri -- 10:16 AM EST     1.40 feet Low Tide
Fri -- 02:13 PM EST     Moonrise
Fri -- 04:27 PM EST     6.66 feet High Tide
Fri -- 05:17 PM EST     Sunset
Fri -- 10:43 PM EST     0.81 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.53.95.26.36.76.35.44.2321.41.62.33.54.85.96.66.55.84.63.3210.8

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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Wind Forecast for Charleston, SC (15,3,4,5)
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Ground Weather Radar Station Charleston, SC
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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.