Monday, June25, 2018 L-36.com


Marine Weather and Tides
Kiawah Island, SC

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 6:12AMSunset 8:33PM Monday June 25, 2018 3:28 AM EDT (07:28 UTC) Moonrise 5:25PMMoonset 3:28AM Illumination 90% Phase: Waxing Gibbous; Moon at 12 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- 1109 Pm Edt Sun Jun 24 2018
Rest of tonight..SW winds 5 to 10 kt. Showers and tstms likely.
Mon..SW winds 5 to 10 kt. A slight chance of showers and tstms.
Mon night..SW winds 10 kt, becoming W after midnight. A chance of showers and tstms in the evening, then showers and tstms likely after midnight.
Tue..NE winds 5 to 10 kt, becoming E in the afternoon. Showers and tstms likely.
Tue night..E winds 5 to 10 kt. Showers and tstms likely, mainly in the evening.
Wed..E winds 5 kt. A chance of showers and tstms.
Wed night..S winds 5 kt. A chance of showers and tstms, mainly in the evening.
Thu..SW winds 5 kt. A chance of showers and tstms.
Thu night..S winds 5 kt. A slight chance of showers and tstms.
Fri..S winds 5 kt. A chance of showers and tstms.
Fri night..S winds 5 kt. A chance of showers and tstms. Mariners are reminded that winds and waves higher in and near tstms. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 85 degrees.
AMZ300 1109 Pm Edt Sun Jun 24 2018
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will extend across the region through Monday. A cold front will drop south into the area Monday and linger near or just south of the area through mid-week. Low pressure could develop off the southeast u.s. NExt weekend.

7 Day Forecast for Marine Location Near Kiawah Island, SC
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location: 32.59, -80.11     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 250553
afdchs
area forecast discussion
national weather service charleston sc
153 am edt Mon jun 25 2018

Synopsis
High pressure will extend across the region through Monday. A
cold front will drop south into the area Monday and linger near
or just south of the area through mid-week. Low pressure could
develop off the southeast u.S. Next weekend.

Near term until 6 am this morning
Boundary enhanced convection has worked into far southern
coastal sc where strong storms linger from jasper beaufort
counties eastward over the waters. A large shield of lighter
rains will linger but diminish over the next few hours across
the sc zones. The cut-off is right along the savannah river and
we think rain chances in southeast ga will be low overnight as
mid level subsidence looks to hold. We will be making some
intermediate updates overnight to account for ongoing changes.

Short term 6 am this morning through Wednesday
Few changes were made to ensure consistency with overnight
shift.

A cold front will approach from the northwest Monday and then
move south into the area Monday night before stalling nearby
through the rest of the period. This will mean a more unsettled
period with decent rain chances is expected Monday night into at
least Tuesday. Some of the storms could be strong late Monday
afternoon evening, mainly across sc, given the high dcape values
(1000+ j kg) and steep low to mid-level lapse rates.

Temperatures will remain above normal Monday ahead of the front
with heat indices peaking into the heat advisory range 105-108
inland, 108-112 coast.

Long term Wednesday night through Sunday
Minor changes were made per regional coordination with NHC wpc
on the potential for low pressure developing off the southeast
u.S. Coast.

The latest medium range model guidance suggests the stalled
cold front will dissipate as an offshore high pressure inland
trough pattern likely sets up. Low pressure is expected to
develop off the sc nc coast by late week and drop southwest to
somewhere near or offshore of the ga fl coast over the weekend
per track coordination with NHC wpc. Depending on the eventual
development and track of the low, increased rain chances and
breezy conditions could develop.

Aviation 06z Monday through Friday
Kchs: light rains and mainly mainly in-cloud lightning will
persist another couple hours at the most.VFR with chances for
storms again this afternoon and evening just ahead of a
backdoor cold front.

Ksav: vcts with most storms off to the east now the next hour
or so.VFR overnight with timing a bit uncertain on the next
chances for tstms and we have no mentions for thunder later
today as potential a bit low at this point.

Extended aviation outlook: risk for TSTM impacts possible
Monday night into Tuesday and again by late week into the
weekend depending on track of low pressure offshore.

Marine
Tonight: an inland surface trough and high pressure in the
atlantic will drive the weather pattern. Winds will peak along
the immediate coastline through early this evening. Though,
locally higher gusts are possible along the sc coastline. By
late evening the winds will ease a few kt, then a second surge
in winds is possible further offshore, lasting until almost
daybreak. Additionally, winds closer to the coast should veer
more towards the west around daybreak as the land breeze
develops. Seas will average 2-3 ft, except 3-4 ft across the
charleston waters during the peak winds. There is a slight
chance strong thunderstorms may develop inland this evening and
move offshore tonight, producing hazardous weather for mariners.

Monday through Friday: few changes were made through mid-week
to ensure consistency with the overnight shift. Southerly winds
will prevail ahead of a cold front Monday with enhanced sea
breeze influences possible. Front will backdoor into the region
Monday night into Tuesday. There is potential for low pressure
to develop off the southeast u.S. Coast by late week. Small
craft advisory conditions are not expected.

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
FBIS1 - Folly Island, SC 13 mi28 min SW 6 G 7 76°F 1017.2 hPa (-2.5)67°F
CHTS1 16 mi46 min W 2.9 G 5.1 76°F 86°F1016.4 hPa
ACXS1 - ACE Basin Reserve, SC 18 mi103 min Calm 71°F 1019 hPa70°F
41033 27 mi140 min WSW 16 G 23 81°F 82°F1017.7 hPa
41029 - Capers Nearshore (CAP 2) 30 mi80 min W 25 G 37 76°F 80°F1016.3 hPa
41004 - EDISTO - 41 NM Southeast of Charleston, SC 54 mi38 min SW 14 G 16 3 ft1017.6 hPa

Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston Executive Airport, SC10 mi33 minSSW 47.00 miThunderstorm in Vicinity Rain72°F69°F94%1016.6 hPa
Charleston, Charleston Air Force Base, SC23 mi92 minSSW 128.00 miThunderstorm Light Rain73°F71°F94%1017.9 hPa

Wind History from JZI (wind in knots)
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Last 24hrCalmCalmS5SW5SW7W7W96SW7W6S9S12S12S11S11S10S9S7S7
G13
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1 day agoW5SW4S3SW5SW6SW8SW8SW6W8S7
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2 days agoCalmCalmCalmW4W6SW6W8W6W75
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S6SW5SW5SW6SW4S3

Tide / Current Tables for Kiawah River Bridge, South Carolina
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Kiawah River Bridge
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Mon -- 12:49 AM EDT     0.31 feet Low Tide
Mon -- 04:27 AM EDT     Moonset
Mon -- 06:14 AM EDT     Sunrise
Mon -- 06:57 AM EDT     5.17 feet High Tide
Mon -- 12:53 PM EDT     -0.05 feet Low Tide
Mon -- 06:24 PM EDT     Moonrise
Mon -- 07:35 PM EDT     6.41 feet High Tide
Mon -- 08:31 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.30.81.934.14.95.24.83.92.71.40.3-00.51.634.45.66.36.45.74.42.9

Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
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Charleston Harbor Entrance
Click for Map
Mon -- 01:14 AM EDT     0.01 knots Slack
Mon -- 03:06 AM EDT     1.25 knots Max Flood
Mon -- 04:26 AM EDT     Moonset
Mon -- 06:12 AM EDT     Sunrise
Mon -- 06:57 AM EDT     -0.00 knots Slack
Mon -- 10:22 AM EDT     -2.03 knots Max Ebb
Mon -- 01:21 PM EDT     0.00 knots Slack
Mon -- 03:42 PM EDT     1.53 knots Max Flood
Mon -- 06:23 PM EDT     Moonrise
Mon -- 07:48 PM EDT     -0.00 knots Slack
Mon -- 08:31 PM EDT     Sunset
Mon -- 10:57 PM EDT     -2.57 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1.5-0.30.81.31.10.90.6-0-0.8-1.5-2-1.9-1.3-0.40.71.41.51.41.30.7-0.2-1.3-2.2-2.6

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.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Charleston, SC (3,6,7,8)
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Ground Weather Radar Station Charleston, SC
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weather_mapweather_map weather_map

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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.