Friday, January24, 2020
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Marine Weather and Tides
Sullivan's Island, 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 7:17AMSunset 5:45PM Friday January 24, 2020 8:20 PM EST (01:20 UTC) Moonrise 7:16AMMoonset 5:37PM Illumination 0% Phase: New Moon; Moon at 29 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- 640 Pm Est Fri Jan 24 2020
Tonight..S winds 10 kt, becoming W after midnight. Patchy dense fog this evening. Showers likely. Vsby 1/4 nm or less this evening.
Sat..W winds 10 to 15 kt with gusts to 20 kt.
Sat night..W winds 10 kt.
Sun..W winds 5 to 10 kt.
Sun night..W winds 5 to 10 kt. A chance of showers after midnight.
Mon..W winds 5 to 10 kt. A slight chance of showers in the morning.
Mon night..NW winds 5 to 10 kt.
Tue..N winds 5 kt.
Tue night..NE winds 5 kt.
Wed..E winds 5 kt. A slight chance of showers.
Wed night..NE winds 5 kt. A slight chance of showers. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 53 degrees.
AMZ300 640 Pm Est Fri Jan 24 2020
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A cold front will push offshore tonight followed by high pressure. A few upper disturbances will move through next week.


7 Day Forecast for Marine Location Near Sullivan's Island, SC
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location: 32.77, -79.91     debug


Area Discussion for - Charleston, SC
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FXUS62 KCHS 242356 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 656 PM EST Fri Jan 24 2020

SYNOPSIS. A cold front will push offshore tonight followed by high pressure. A few upper disturbances will move through next week.

NEAR TERM /UNTIL 6 AM SATURDAY MORNING/. This evening: Pre-frontal convective rains have become less focused and the risk for thunder appears to be on the wane ahead of the cold front. We adjusted POPs a bit prior to 00Z but overall, rain chances will be at their highest prior to midnight. Rains will quickly end from southwest to northeast with the passage of the front with cooler and drier air moving in by daybreak, although some low clouds could linger much of the night, especially across SC. There is also some indication that fog may develop over the Midlands and make a run toward inland portions of the forecast area late. In addition, sea fog and stratus may keep a blanket of lower clouds and some fog along coastal zones at times through at least 06Z. Low temps should range from near 40 toward the CSRA to lower 50s along the central SC coast.

SHORT TERM /6 AM SATURDAY MORNING THROUGH MONDAY/. Dry and cool high pressure will build across the area Saturday through Sunday, bringing a return to near-normal temperatures. An upper shortwave will move through Sunday night and Monday morning, though with deep layered flow out of the WSW, moisture will be limited during this time. Isolated showers will be possible, mainly Sunday night, though perhaps lingering into Monday morning along the coast.

LONG TERM /MONDAY NIGHT THROUGH FRIDAY/. High pressure and dry conditions are expected Monday night into Tuesday. Models then diverge on the weather pattern and resultant conditions for our area. It appears several weak systems are possible, but the timing/placement for each is uncertain. We went with slight chance POPs Wednesday and Thursday, but anticipate more changes will be needed.

AVIATION /00Z SATURDAY THROUGH WEDNESDAY/. Conditions will occasionally go MVFR ahead of the cold front later tonight with chances for showers prior to midnight at KSAV and 06Z at KCHS. There could be some IFR conditions at KCHS from either marine stratus advecting north over the next few hours or possible from the west post frontal later tonight but prior to daybreak. VFR conditions are expected Saturday.

Extended Aviation Outlook: Low chance for flight restrictions in scattered showers Sunday night.

MARINE. Tonight: South winds will veer to southwest and west after a cold front passes through shortly after midnight. Expect a bit of a surge in winds/seas but conditions should remain below Small Craft Advisory levels for all areas except off the Charleston County coast and well off the GA coast. We have seen some reports of dense fog along the GA and lower SC coast this evening and have issued a Marine Weather Statement to cover locally dense fog possibilities ahead of the cold front this evening.

Saturday through Tuesday: Winds and seas will gradually subside Saturday into Sunday as high pressure builds over the waters. The Small Craft Advisory for the nearshore Charleston County waters continues through Saturday morning and the SCA for offshore GA waters runs through Saturday night.

A few weak disturbances will move through next week but no marine headlines are anticipated.

CHS WATCHES/WARNINGS/ADVISORIES. GA . None. SC . None. MARINE . Small Craft Advisory until 7 AM EST Sunday for AMZ374. Small Craft Advisory until noon EST Saturday for AMZ350.

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHTS1 1 mi50 min NE 1.9 G 2.9 56°F 52°F1014.8 hPa
FBIS1 - Folly Island, SC 6 mi80 min SSE 4.1 G 5.1 57°F 1015.3 hPa (-0.8)57°F
41029 - Capers Nearshore (CAP 2) 15 mi132 min S 9.7 G 14 58°F 53°F1015.8 hPa
ACXS1 - ACE Basin Reserve, SC 32 mi95 min SSE 1 60°F 1015 hPa60°F
41033 43 mi72 min S 7.8 G 14 57°F 54°F1015.3 hPa
41004 - EDISTO - 41 NM Southeast of Charleston, SC 47 mi30 min 18 G 21 72°F7 ft1014.9 hPa

Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston Executive Airport, SC7 mi25 minN 05.00 miFog/Mist61°F60°F100%1014.9 hPa
Mount Pleasant Regional-Faison Field, SC11 mi25 minSSE 36.00 miFog/Mist61°F60°F100%1014.9 hPa
Charleston, Charleston Air Force Base, SC12 mi84 minSSE 910.00 miMostly Cloudy61°F60°F97%1014.2 hPa

Link to 5 minute data for KJZI

Wind History from JZI (wind in knots)
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CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
1 day agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
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Tide / Current Tables for Charleston, South Carolina
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Charleston
Click for Map
Fri -- 01:09 AM EST     -0.43 feet Low Tide
Fri -- 07:15 AM EST     Moonrise
Fri -- 07:19 AM EST     Sunrise
Fri -- 07:44 AM EST     5.85 feet High Tide
Fri -- 01:49 PM EST     -0.09 feet Low Tide
Fri -- 04:44 PM EST     New Moon
Fri -- 05:37 PM EST     Moonset
Fri -- 05:44 PM EST     Sunset
Fri -- 07:51 PM EST     4.74 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.1-0.4-0.10.92.33.74.95.75.85.34.22.71.30.2-0.10.51.62.73.84.54.74.33.42.2

Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
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Charleston Harbor Entrance
Click for Map
Fri -- 01:46 AM EST     0.00 knots Slack
Fri -- 04:23 AM EST     1.59 knots Max Flood
Fri -- 07:15 AM EST     Moonrise
Fri -- 07:18 AM EST     Sunrise
Fri -- 08:16 AM EST     -0.00 knots Slack
Fri -- 11:18 AM EST     -2.69 knots Max Ebb
Fri -- 02:20 PM EST     0.00 knots Slack
Fri -- 04:22 PM EST     1.45 knots Max Flood
Fri -- 04:44 PM EST     New Moon
Fri -- 05:37 PM EST     Moonset
Fri -- 05:44 PM EST     Sunset
Fri -- 08:12 PM EST     -0.00 knots Slack
Fri -- 11:28 PM EST     -2.21 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.7-0.80.31.21.61.61.61.20.3-0.9-2-2.6-2.5-1.6-0.40.81.41.41.20.90.2-0.7-1.6-2.1

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Charleston, SC (20,4,5,8)
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Ground Weather Radar Station Charleston, SC
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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.