Thursday, April2, 2020
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Marine Weather and Tides
Charleston, 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 7:04AMSunset 7:42PM Thursday April 2, 2020 9:19 PM EDT (01:19 UTC) Moonrise 12:41PMMoonset 2:22AM Illumination 75% 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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AMZ330 Charleston Harbor- 701 Pm Edt Thu Apr 2 2020
Tonight..NW winds 5 to 10 kt.
Fri..N winds 5 to 10 kt, becoming nw in the afternoon.
Fri night..W winds 5 to 10 kt, becoming nw after midnight.
Sat..NE winds 10 kt, becoming E in the afternoon.
Sat night..E winds 5 kt.
Sun..E winds 5 to 10 kt.
Sun night..S winds 5 to 10 kt.
Mon..SW winds 5 to 10 kt.
Mon night..SW winds 5 to 10 kt. A slight chance of showers.
Tue..SW winds 5 to 10 kt. A chance of showers.
Tue night..SW winds 5 to 10 kt. A chance of showers. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 67 degrees.
AMZ300 701 Pm Edt Thu Apr 2 2020
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will prevail into early next week. A cold front will approach the region towards the middle of next week.


7 Day Forecast for Marine Location Near Charleston, SC
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location: 32.78, -79.93     debug


Area Discussion for - Charleston, SC
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FXUS62 KCHS 022312 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 712 PM EDT Thu Apr 2 2020

SYNOPSIS. High pressure will prevail into early next week. A cold front will approach the region towards the middle of next week.

NEAR TERM /UNTIL 6 AM FRIDAY MORNING/. As of 710 PM: IR satellite and limited surface observations indicated cool and dry conditions across the CWA. The forecast appears on track.

Previous Discussion: Tonight: High pressure centered north of the forecast area will continue to prevail through the overnight. The pressure gradient will become quite weak, and with clear skies overhead good radiational cooling conditions are expected. Expect we will see lows similar to last night, with mostly mid 40s away from the immediate coastline. Could see a few low 40s in the typical cool, sheltered locations. Cirrus will likely increase from the west late, but isn't expected to have a significant impact on temperatures.

SHORT TERM /6 AM FRIDAY MORNING THROUGH SUNDAY/. High confidence through Saturday night with moderate confidence Sunday. High pressure will prevail through the period although there could be a few showers Sunday as moisture increases and some upper-level energy potentially affects the area. Otherwise, generally expect near to below normal temperatures, except for possible above normal low temps as early as Friday night.

LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/. Atlantic high pressure will be the dominant feature on Monday, with a dry forecast to continue. High pressure will then weaken as low pressure and an associated cold front moves into the eastern U.S. towards the middle of the week. Differences exist between model solutions regarding details, but moisture will increase and a stream of shortwave energy is progged to pass through, so rain chances will return. PoPs are held in the chance range. Temperatures will be above normal through the period.

AVIATION /23Z THURSDAY THROUGH TUESDAY/. VFR conditions will prevail at KCHS and KSAV through 00z Saturday.

Extended Aviation Outlook: High confidence of VFR conditions at KCHS/KSAV Friday night through at least Saturday, then low confidence starting as early as Saturday night but more likely starting Monday night due to possible restrictions from low clouds and/or showers.

MARINE. Tonight: High pressure to the north will prevail and continue to drive north to northwest flow across the local waters. Winds will drop off to around 10 knots or less early this evening before increasing late with a modest nocturnal surge. Winds should still top out around 15 knots, mainly across the Charleston County waters. Seas are expected to range 2-3 feet out to 20 nm and 3-4 feet beyond.

Friday through Tuesday: High confidence this period with no significant concerns as high pressure prevails. Small risk for marginal Small Craft Advisory conditions in the offshore waters starting late Saturday night or Sunday as seas potentially build to 6 feet beyond 40 nm.

TIDES/COASTAL FLOODING. Higher than normal tide levels are expected through at least early next week due to astronomical influences from the upcoming full moon and lunar perigee as well as onshore winds and swells. Minor saltwater flooding will be possible, especially along the SC coast, around the times of mostly the morning high tides early in the week and then more likely the evening high tides toward mid week.

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

NEAR TERM . NED SHORT TERM . RJB LONG TERM . ETM AVIATION . NED MARINE . BSH/RJB TIDES/COASTAL FLOODING .


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHTS1 0 mi50 min W 4.1 G 5.1 64°F 67°F1014.9 hPa
FBIS1 - Folly Island, SC 7 mi80 min WNW 2.9 G 4.1 60°F 1015.2 hPa (+0.4)49°F
41029 - Capers Nearshore (CAP 2) 16 mi72 min N 9.7 G 9.7 65°F 67°F1014 hPa
ACXS1 - ACE Basin Reserve, SC 32 mi95 min Calm 62°F 1015 hPa42°F
41033 43 mi72 min W 7.8 G 12 65°F 67°F1014.5 hPa
41004 - EDISTO - 41 NM Southeast of Charleston, SC 48 mi30 min 16 G 19 65°F 71°F4 ft1014.5 hPa55°F

Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston Executive Airport, SC7 mi2.1 hrsWNW 510.00 miFair64°F39°F40%1014.6 hPa
Charleston, Charleston Air Force Base, SC10 mi2.4 hrsNW 910.00 miA Few Clouds66°F37°F36%1014.2 hPa
Mount Pleasant Regional-Faison Field, SC11 mi2.1 hrsN 010.00 miFair64°F39°F40%1014.2 hPa

Link to 5 minute data for KCHS

Wind History from CHS (wind in knots)
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Last 24hrN4N3CalmCalmCalmCalmNW3NW4NW3N6N6NW4NW5N6N6N6NW8NW9NW11
G16
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1 day ago--W5W4W9NW9N11N12N13N15
G22
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2 days agoNW5CalmCalmW5W5W3CalmCalmCalmNW3S4CalmCalmNE4E8E11E11E9E15E13E10SE13NW14
G21
N15

Tide / Current Tables for Charleston, South Carolina
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Charleston
Click for Map
Thu -- 03:10 AM EDT     5.32 feet High Tide
Thu -- 03:22 AM EDT     Moonset
Thu -- 07:05 AM EDT     Sunrise
Thu -- 09:46 AM EDT     0.84 feet Low Tide
Thu -- 01:41 PM EDT     Moonrise
Thu -- 03:44 PM EDT     4.49 feet High Tide
Thu -- 07:40 PM EDT     Sunset
Thu -- 10:02 PM EDT     0.48 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.14.255.35.14.53.52.51.610.91.32.13.13.94.44.54.13.42.41.50.80.50.8

Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
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Charleston Harbor Entrance
Click for Map
Thu -- 12:08 AM EDT     1.46 knots Max Flood
Thu -- 03:22 AM EDT     Moonset
Thu -- 03:41 AM EDT     -0.00 knots Slack
Thu -- 07:05 AM EDT     Sunrise
Thu -- 07:14 AM EDT     -1.88 knots Max Ebb
Thu -- 10:25 AM EDT     0.00 knots Slack
Thu -- 12:41 PM EDT     1.20 knots Max Flood
Thu -- 01:41 PM EDT     Moonrise
Thu -- 03:58 PM EDT     -0.00 knots Slack
Thu -- 07:32 PM EDT     -1.72 knots Max Ebb
Thu -- 07:40 PM EDT     Sunset
Thu -- 10:29 PM EDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.51.30.80.4-0.2-1-1.6-1.9-1.7-1.1-0.30.411.20.80.4-0-0.7-1.3-1.7-1.7-1.2-0.40.4

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 Charleston, SC (21,6,7,8)
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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 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.