Tuesday, April24, 2018 L-36.com


Marine Weather and Tides
Kiawah Island, SC

Version 3.4
What's New / NOTES
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.
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.

Sunrise 6:37AMSunset 7:57PM Tuesday April 24, 2018 8:47 PM EDT (00:47 UTC) Moonrise 1:42PMMoonset 2:30AM Illumination 72% 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- 837 Pm Edt Tue Apr 24 2018
Tonight..SW winds 10 to 15 kt.
Wed..SW winds 10 kt.
Wed night..W winds 5 to 10 kt.
Thu..N winds 5 kt, becoming se in the afternoon.
Thu night..S winds 5 to 10 kt. A chance of showers.
Fri..SW winds 5 kt, increasing to 10 kt in the afternoon. A chance of showers, mainly in the morning.
Fri night..SW winds 5 to 10 kt. A slight chance of showers.
Sat..W winds 5 kt.
Sat night..NW winds 5 kt.
Sun..NE winds 5 to 10 kt.
Sun night..SE winds 5 kt. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 66 degrees.
AMZ300 837 Pm Edt Tue Apr 24 2018
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Low pressure will continue to move northeast away from the area through tonight. An upper level disturbance will move over the area Thursday night, followed by a cold front Friday night. High pressure will then build over the region through early next week.

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 242317
afdchs
area forecast discussion
national weather service charleston sc
717 pm edt Tue apr 24 2018

Synopsis
Low pressure will continue to move northeast away from the area
through tonight. An upper level disturbance will move over the
area Thursday night, followed by a cold front Friday night.

High pressure will then build over the region through early
next week.

Near term until 6 am Wednesday morning
Tonight: a mid upper lvl low centered over kentucky tennessee will
slowly shift east and remain north of the area while sfc low
pressure centered near the south carolina north carolina state line
skirts north northwest of the area, then lifts northeast and away
from the region. Scattered clouds should gradually erode with
sunset, but a few sprinkles can not be ruled out this evening over
far inland and northern locations of southeast south carolina as low
pressure transitions further to the east-northeast and away from
the region early tonight. Expect all areas to remain dry after
sunset while skies become mostly clear and a light southwest
wind slowly turns to west after midnight. Overnight lows will
remain mild, ranging in the mid upper 50s inland to around 60
degrees near the coast.

Short term 6 am Wednesday morning through Friday
High pressure will briefly build over the region Wednesday and
Wednesday night, then an upper shortwave will approach Thursday
and Thursday night. A surface low lifting northeast into central
va will push a weak cold front through late Thursday afternoon
and Thursday night. Given the weak moisture return ahead of the
front, the shower coverage associated with the front will likely
be on the decrease as it approaches. We are only showing chance
pops, highest in northern areas, for Thursday night. We
maintained a slight chance of showers through Friday since
another upper shortwave will rotate through during the day. High
temps will be in the upper 70s to around 80 each day.

Long term Friday night through Tuesday
Forecast confidence remains low through Saturday. A longwave
upper trough and associated cold front will push through the
region. However, solutions range from progressive features
crossing the region with nothing more than a few showers to a
deeper upper trough and associated surface cyclogenesis
producing more persistent precipitation through Saturday. The
latest forecast maintains a rain-free forecast Saturday. Then,
models agree that high pressure will build at the surface and
aloft over the region late weekend through at least early next
week, supporting dry weather and near to slightly above normal
temps.

Aviation 23z Tuesday through Sunday
Vfr conditions will prevail at kchs and ksav through 00z Thursday.

Extended aviation outlook: flight restrictions unlikely.

Marine
Tonight: low pressure will slowly shift east northeast just north of
the area, resulting in a steady pressure gradient over northern
waters and slightly more relaxed pressure gradient over southern
waters. Given the setup, southwest winds could gust up to 15-20 kt
in northern sc waters early tonight while the remainder of the
coastal waters experience wind speeds closer to the 10-15 kt
range. As the low shifts further east-northeast overnight, winds
should slowly decrease and slightly turn more west-southwest
late. Seas will be elevated, but will show a subsiding trend.

However, 6 ft seas should linger in northern sc waters through
much of the night and continue in offshore georgia waters into
tomorrow. Small craft advisories will therefore remain in effect
for northern sc waters and offshore georgia waters tonight,
while nearshore waters south of edisto beach, sc will likely
expire within the next hour.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... Small craft advisory until 8 pm edt this evening for amz352.

Small craft advisory until 2 pm edt Wednesday for amz374.

Small craft advisory until 7 am edt Wednesday for amz350.

Near term... Dpb
short term... Jrl
long term... Spr
aviation... Dpb jrl
marine... Dpb jrl


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHTS1 16 mi47 min SW 11 G 14 68°F 66°F1009.4 hPa (+0.0)
ACXS1 - ACE Basin Reserve, SC 18 mi62 min Calm 68°F 62°F
41033 27 mi39 min SSW 12 G 16 66°F 65°F1009.5 hPa
41029 - Capers Nearshore (CAP 2) 30 mi39 min SW 12 G 16 66°F 64°F1009 hPa
41004 - EDISTO - 41 NM Southeast of Charleston, SC 54 mi37 min SSW 14 G 18 69°F1010.1 hPa

Wind History for Charleston, SC
(wind in knots)    EDIT      (on/off)   Help
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NE14
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G35
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NE12
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NE9
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NE12
G17

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston Executive Airport, SC10 mi52 minSSW 9 G 168.00 miFair66°F60°F83%1009.8 hPa
Charleston, Charleston Air Force Base, SC23 mi51 minSSW 1010.00 miA Few Clouds69°F57°F68%1009 hPa

Wind History from JZI (wind in knots)
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Last 24hrE13
G27
E8SE10
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CalmCalmSW5SW5
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SW7S6S10S8S10S10S12S11S14S12
G17
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1 day agoE13
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NE16E14
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G29
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G25
E14
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G27
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G21
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G27
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G28
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G28
2 days agoNE8NE9NE8NE8NE8E8NE7NE7NE8NE7NE7NE7E11E11E12E11E12E14
G20
E11E13
G18
E11E12NE9
G14
NE11

Tide / Current Tables for Kiawah River Bridge, South Carolina
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Kiawah River Bridge
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Tue -- 03:30 AM EDT     Moonset
Tue -- 04:10 AM EDT     6.11 feet High Tide
Tue -- 06:40 AM EDT     Sunrise
Tue -- 10:25 AM EDT     0.23 feet Low Tide
Tue -- 02:41 PM EDT     Moonrise
Tue -- 04:52 PM EDT     5.62 feet High Tide
Tue -- 07:56 PM EDT     Sunset
Tue -- 10:47 PM EDT     0.18 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.13.54.75.76.15.953.72.310.30.41.12.33.54.65.45.65.24.12.81.50.50.2

Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
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Charleston Harbor Entrance
Click for Map
Tue -- 12:28 AM EDT     1.55 knots Max Flood
Tue -- 03:29 AM EDT     Moonset
Tue -- 04:25 AM EDT     -0.00 knots Slack
Tue -- 06:39 AM EDT     Sunrise
Tue -- 07:43 AM EDT     -2.38 knots Max Ebb
Tue -- 10:53 AM EDT     0.00 knots Slack
Tue -- 01:02 PM EDT     1.40 knots Max Flood
Tue -- 02:40 PM EDT     Moonrise
Tue -- 04:59 PM EDT     -0.00 knots Slack
Tue -- 07:55 PM EDT     Sunset
Tue -- 08:12 PM EDT     -2.27 knots Max Ebb
Tue -- 11:15 PM EDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.51.51.310.4-0.6-1.5-2.2-2.4-1.8-0.90.11.11.41.31.10.8-0-0.9-1.8-2.3-2.1-1.3-0.3

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 (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.