Friday, March22, 2019 L-36.com


Marine Weather and Tides
Sullivan's Island, SC

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:19AMSunset 7:33PM Friday March 22, 2019 8:22 PM EDT (00:22 UTC) Moonrise 8:33PMMoonset 7:39AM Illumination 96% Phase: Waning Gibbous; Moon at 17 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- 615 Pm Edt Fri Mar 22 2019
Tonight..W winds 10 to 15 kt with gusts to 20 kt early, diminishing to 5 to 10 kt later this evening, then becoming N late.
Sat..NE winds 5 to 10 kt, becoming variable 5 kt.
Sat night..S winds 5 to 10 kt, becoming E after midnight.
Sun..E winds 5 to 10 kt, becoming se in the afternoon.
Sun night..S winds 5 to 10 kt.
Mon..SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts to 20 kt in the afternoon. A slight chance of showers and tstms in the afternoon.
Mon night..SW winds 10 to 15 kt. A chance of showers with a slight chance of tstms.
Tue..N winds 15 to 20 kt. Waves 1 to 2 ft. A chance of showers.
Tue night..NE winds 15 to 20 kt. Waves 1 to 2 ft. A slight chance of showers.
Wed..N winds 15 to 20 kt. Waves 1 to 2 ft.
Wed night..NE winds 10 to 15 kt. Mariners are reminded that winds and waves higher in and near tstms. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 60 degrees.
AMZ300 615 Pm Edt Fri Mar 22 2019
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A dry cold front will drop through the region tonight. High pressure will build over the region this weekend. Low pressure is expected to move across the region on Monday night through Tuesday night. High pressure will then rebuild.


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 222240
afdchs
area forecast discussion
national weather service charleston sc
640 pm edt Fri mar 22 2019

Synopsis
A dry cold front will drop through the region tonight. High
pressure will build over the region this weekend. Low pressure
is expected to move across the region on Monday night through
Tuesday night. High pressure will then rebuild.

Near term until 6 am Saturday morning
A dry cold front currently moving slowly south across north
carolina will drop through the forecast area early Saturday.

Post-frontal cold air advection is forecast to be rather weak
and mostly confined to 925 hpa and below. While the boundary
layer could decouple in a few inland areas after sunset, a weak
westerly flow will persist before shifting northwest to north
after fropa. Lows will range from the lower 40s inland to the
to around 50 at the beaches and downtown charleston.

For the sunset update: lowered overnight lows a few degrees in
select locations, mainly across interior southeast georgia west
of i-95 and in the francis marion national forest.

Short term 6 am Saturday morning through Monday
Surface high pressure will build over the region on Saturday and
will slide of the carolina coast on Sunday. Saturday and Sunday,
daytime temperatures will peak around 70 with morning lows in the
40s. The center of low pressure will track rapidly east across the
ohio river valley and mid appalachians on Monday. A cold front
associated with the low is expected to slide across the foothills
and piedmont of the carolinas by Monday afternoon. Temperatures on
Monday in advance of the front are forecast to warm into the upper
70s with dewpoints in the mid to upper 50s. Gfs CAPE values may
surge to around 500 j kg Monday afternoon and evening. I will keep a
mention of schc for thunderstorms.

Long term Monday night through Friday
A series of shortwaves will move through the area Monday night
through Tuesday night while a backdoor cold front slowly sinks
south through the area. We currently have the highest rain
chances on Tuesday as this coincides with the front dropping
through the area and the strongest PVA aloft. Cool high pressure
will affect the area through Wednesday before weakening and
shifting east, allowing for a warming trend late next week.

Aviation 00z Saturday through Wednesday
Vfr.

Extended aviation outlook: flight restrictions possible Monday
night through Tuesday night.

Marine
This evening through tonight: west winds should gradually turn west-
southwest this evening as dry high pressure extends over the waters.

In general, winds should top out in the 15-20 kt range while seas
are no higher than 3-4 ft. A dry cold front is then expected to
approach from the northwest, then shift over the coastal waters
after midnight. Winds are expected to remain elevated (15-20 kt)
post fropa, but will likely turn northwest after midnight, then
north across south carolina waters approaching daybreak Saturday.

Extended marine: high pressure will build over the marine zones on
Saturday and will slide east on Sunday, yielding winds generally
below 15 kts. Seas are expected to range between 1 to 3 ft. A cold
front will approach the region on Monday, sliding across the region
Monday night into Tuesday morning. In the wake of the front, gusty
ne winds are expected across the marine zones. Small craft advisory
conditions may begin on Tuesday and remain through Wednesday. High
pressure is expected to build across the region on Thursday,
resulting in decreasing winds. Seas on Thursday may remain at or
above small craft advisory criteria.

Fire weather
Saturday through Sunday: critical or near-critical relative
humidity values are likely to persist.

Equipment
The kclx radar is inoperative. Parts are on order and repairs are
expected to occur on Monday.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... None.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHTS1 1 mi34 min WSW 6 G 9.9 66°F 60°F1012.7 hPa
FBIS1 - Folly Island, SC 6 mi82 min W 7 G 9.9 66°F 1012.7 hPa (-0.0)33°F
41029 - Capers Nearshore (CAP 2) 15 mi74 min W 12 G 18 64°F 59°F1012 hPa
ACXS1 - ACE Basin Reserve, SC 32 mi97 min W 4.1 68°F 1013 hPa35°F
41033 43 mi74 min W 9.7 G 16 64°F 60°F1012.7 hPa
41004 - EDISTO - 41 NM Southeast of Charleston, SC 47 mi32 min WSW 21 G 25 65°F 71°F5 ft1012.9 hPa

Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston Executive Airport, SC7 mi27 minSW 510.00 miFair63°F33°F34%1013.2 hPa
Mount Pleasant Regional-Faison Field, SC11 mi27 minN 010.00 miFair63°F32°F32%1012.5 hPa
Charleston, Charleston Air Force Base, SC12 mi26 minWSW 610.00 miFair62°F30°F31%1012.6 hPa

Wind History from CHS (wind in knots)
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Last 24hr------------------------------------------------
1 day ago------------------------------------------------
2 days ago------------------------------------------------

Tide / Current Tables for Fort Johnson, South Carolina
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
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Charleston Harbor Entrance
Click for Map
Fri -- 01:15 AM EDT     -3.40 knots Max Ebb
Fri -- 04:17 AM EDT     0.01 knots Slack
Fri -- 06:42 AM EDT     2.23 knots Max Flood
Fri -- 07:20 AM EDT     Sunrise
Fri -- 08:38 AM EDT     Moonset
Fri -- 10:28 AM EDT     -0.01 knots Slack
Fri -- 01:34 PM EDT     -3.07 knots Max Ebb
Fri -- 04:37 PM EDT     0.00 knots Slack
Fri -- 07:09 PM EDT     2.13 knots Max Flood
Fri -- 07:32 PM EDT     Sunset
Fri -- 09:33 PM EDT     Moonrise
Fri -- 10:56 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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-2.6-3.4-3.1-2-0.41.122.221.50.6-0.7-2-2.9-3-2.2-0.90.51.72.121.81.1-0.1

Weather Map and Satellite Images
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wmap_A
GOES 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.
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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 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.