Tuesday, April25, 2017 L-36.com


Marine Weather and Tides
Charleston, SC

Version 3.4
What's New / NOTES
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:36AMSunset 7:58PM Tuesday April 25, 2017 8:33 AM EDT (12:33 UTC) Moonrise 5:15AMMoonset 6:11PM 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- 729 Am Edt Tue Apr 25 2017
Today..W winds 10 to 15 kt.
Tonight..W winds 5 to 10 kt.
Wed..W winds 5 kt...becoming S 15 kt in the afternoon.
Wed night..S winds 10 to 15 kt.
Thu..SW winds 5 to 10 kt...becoming S 15 kt in the afternoon.
Thu night..S winds 10 to 15 kt.
Fri..S winds 10 to 15 kt.
Fri night..S winds 10 to 15 kt.
Sat..S winds 10 to 15 kt.
Sat night..S winds 10 to 15 kt. Unless otherwise noted...waves 1 foot or less. Charleston harbor water temperature...74 degrees.
AMZ300 729 Am Edt Tue Apr 25 2017
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Low pressure will move away from the area today while high pressure builds in. A weak disturbance will affect the area Thursday night then high pressure will prevail Friday through the weekend. A cold front will affect the area Monday and Monday night.

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 251137
afdchs
area forecast discussion
national weather service charleston sc
737 am edt Tue apr 25 2017

Synopsis
Low pressure will move away from the area today while high
pressure builds in. A weak disturbance will affect the area
Thursday night, then high pressure will prevail Friday through
the weekend. A cold front will affect the area Monday and Monday
night.

Near term /through tonight/
Today: the deep mid/upper level low will start off the day
situated near the north carolina/south carolina state line along
the coast. This feature will then steadily ride to the
northeast and further from the forecast area through the day. At
the surface, an area of low pressure over central north
carolina will lift to the northeast as well. This setup will
leave the forecast area in a transition zone for the day with
high pressure well to the south attempting to build in. We may
still see showers developing under the mid/upper level low in
the morning, mainly impacting locations across eastern berkeley
and charleston counties. Pop's are in the 20-30 percent range as
the coverage of showers will be limited thanks to the waning
influence of the mid/upper level low. Instead, the main impact
will be lingering low level stratus that will impact much of
southeast south carolina well into the afternoon. Southeast
georgia will clear out first and should see plenty of sunshine
in the afternoon. High temperatures are expected to range from
the low 80s closer to the altamaha, to the mid 70s near the
santee river.

Tonight: a very quiet night will be on tap as any remaining low
level moisture gets stripped out behind the departing surface
low. The forecast is dry with mostly clear skies and lows in the
upper 50s to low 60s.

Short term /Wednesday through Friday/
Deep layered ridging Wednesday into Thursday will support high
temps in the middle 80s most areas. A weak upper disturbance
will brush past the western areas late Thursday into Thursday
night. Atmospheric moisture will increase enough to support at
least isolated showers and thunderstorms over our inland zones,
possibly the result of a decaying convective cluster late
Thursday afternoon into the evening.

A strengthening low/mid level ridge on Friday with low-level
warm advection and mostly sunny skies will help push high temps
into the upper 80s to lower 90s.

Long term /Friday night through Monday/
Above normal temperatures and mainly dry weather will persist
into Sunday. An upper trough approaches early next week with a
cold front expected to push through Monday and Monday night,
bringing scattered showers/storms.

Aviation /12z Tuesday through Saturday/
At kchs, ifr ceilings are in place and will likely stick around
for another couple of hours. Also, patches of drizzle are
passing through the terminal and briefly reducing visibilities.

Once ceilings lift to MVFR, they will remain there into the
afternoon. Scattering out toVFR will take place later today.

At ksav, ifr ceilings have not made it into the terminal and
likely will not at this point. The forecast initializes with low
end MVFR with a lift toVFR by late morning.

Extended aviation outlook: no significant concerns.

Marine
Today: flow around the departing area of low pressure will help
to keep westerly flow going through the morning before it turns
more southwesterly in the afternoon. Wind speeds in the morning
will be in the 15-20 knot range, diminishing to 10-15 knots in
the afternoon. Seas will gradually decrease through the day,
starting off 3-5 feet in the morning with 4-6 feet across the
outer waters. Then later in the day, expect 2-4 feet out to 20
nm and 4-5 feet beyond.

Tonight: the prevailing flow will remain westerly though the
pressure gradient will decrease significantly. Speeds will be on
the decline, becoming no more than 10 knots by sunrise
Wednesday. Seas will generally range 2-4 feet.

Mainly southerly flow will prevail Wednesday into the weekend
as atlantic high pressure holds firm. The strongest winds will
occur in the evening over the nearshore waters where low-level
jetting occurs. Additionally, the seabreeze will be fairly
potent each afternoon along the coast.

Tides/coastal flooding
Shallow coastal flooding possible with the evening high tides
through Thursday due to the spring tides and possible additional
surge.

Chs watches/warnings/advisories
Ga... None.

Sc... None.

Marine... Small craft advisory until 2 pm edt this afternoon for amz374.

Near term... Bsh
short term... Jrl
long term... Jrl
aviation... Bsh/jrl
marine... Bsh/jrl
tides/coastal flooding... Jrl


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHTS1 0 mi75 min W 6 G 9.9 60°F 74°F1004.9 hPa
FBIS1 - Folly Island, SC 7 mi93 min W 8.9 G 12 60°F 1005.1 hPa (+1.6)59°F
41029 - Capers Nearshore (CAP 2) 16 mi85 min WNW 14 G 19 63°F 71°F1003.6 hPa
ACXS1 - ACE Basin Reserve, SC 32 mi108 min W 2.9 58°F 1005 hPa58°F
41033 43 mi85 min WNW 16 G 19 62°F 70°F1004.8 hPa
41004 - EDISTO - 41 NM Southeast of Charleston, SC 48 mi73 min W 16 G 21 65°F 73°F1003.5 hPa61°F

Wind History for Charleston, SC
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S10
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston Executive Airport, SC7 mi78 minW 63.00 miFog/Mist59°F59°F100%1004.7 hPa
Charleston, Charleston Air Force Base, SC10 mi97 minW 810.00 miOvercast59°F55°F90%1004.1 hPa
Mount Pleasant Regional-Faison Field, SC11 mi78 minWSW 710.00 miOvercast61°F57°F88%1004.7 hPa

Wind History from CHS (wind in knots)
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Last 24hrSE7S12SE6SE9SE93NW4N4NE7NE8NE4NW3CalmW9W5W3NW7W5W5NW10NW8NW8W8W7
1 day agoSW10S6S7S10
G15
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S14S13S17
G22
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S15S12SE12SE11SE12
G19
SE12SE11SE11S14
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S13S4SE7E7E8
2 days agoSW13SW9W11
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W11SW10
G14
SW7
G16
SW10SW14
G20
S15S12S12S14S11S11S8S6S7S8SW8SW8S10SW8S8S8

Tide / Current Tables for Charleston, South Carolina
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Charleston
Click for Map
Tue -- 01:42 AM EDT     -0.32 feet Low Tide
Tue -- 06:15 AM EDT     Moonrise
Tue -- 06:38 AM EDT     Sunrise
Tue -- 07:47 AM EDT     5.74 feet High Tide
Tue -- 01:59 PM EDT     -0.63 feet Low Tide
Tue -- 07:11 PM EDT     Moonset
Tue -- 07:57 PM EDT     Sunset
Tue -- 08:11 PM EDT     6.54 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.9-0.1-0.30.51.93.44.75.55.75.242.51-0.2-0.6-0.11.33.24.866.56.35.33.7

Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
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Charleston Harbor Entrance
Click for Map
Tue -- 02:15 AM EDT     0.01 knots Slack
Tue -- 04:38 AM EDT     1.96 knots Max Flood
Tue -- 06:15 AM EDT     Moonrise
Tue -- 06:38 AM EDT     Sunrise
Tue -- 08:21 AM EDT     -0.00 knots Slack
Tue -- 11:33 AM EDT     -2.92 knots Max Ebb
Tue -- 02:28 PM EDT     0.01 knots Slack
Tue -- 05:00 PM EDT     2.29 knots Max Flood
Tue -- 07:11 PM EDT     Moonset
Tue -- 07:56 PM EDT     Sunset
Tue -- 08:47 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-2.6-1.6-0.30.91.81.91.61.20.4-0.8-2-2.8-2.8-2-0.70.71.92.321.50.9-0.3-1.7-2.7

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Southeast    EDIT
Geos

Wind Forecast for Charleston, SC (8,2,3,4)
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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.