Tuesday, October17, 2017 L-36.com


Marine Weather and Tides
North Charleston, SC

Version 3.4
What's New / NOTES
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.
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.

Sunrise 7:25AMSunset 6:45PM Tuesday October 17, 2017 7:26 AM EDT (11:26 UTC) Moonrise 4:13AMMoonset 4:52PM Illumination 9% Phase: Waning Crescent; Moon at 27 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- 356 Am Edt Tue Oct 17 2017
.small craft advisory in effect through this evening...
Today..NE winds 15 to 20 kt with gusts to 25 kt. Waves 1 to 2 ft.
Tonight..NE winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Waves 1 to 2 ft.
Wed..NE winds 15 kt with gusts to 25 kt.
Wed night..NE winds 15 kt.
Thu..NE winds 15 kt.
Thu night..NE winds 10 kt.
Fri..NE winds 10 kt.
Fri night..NE winds 10 kt.
Sat..NE winds 10 to 15 kt.
Sat night..E winds 10 kt. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 78 degrees.
AMZ300 356 Am Edt Tue Oct 17 2017
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Strong high pressure will build over the area through next weekend.

7 Day Forecast for Marine Location Near North Charleston, SC
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location: 32.85, -80.05     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 170803
afdchs
area forecast discussion
national weather service charleston sc
403 am edt Tue oct 17 2017

Synopsis
Strong high pressure will build over the area through next
weekend.

Near term through tonight
Today: the main upper trough will continue to dampen and shift
off the east coast as the channeled vorticity MAX associated
with it drags through. The surface pattern will hardly change
through the day as a 1025-1030 mb high over the central
appalachians shifts towards the mid atlantic region. This will
result in persistent cool northeast flow producing a day where
temperatures will actually be below normal for a change. Highs
are forecast to be in the 69-72 degree range across southeast
south carolina, and in the low 70s across southeast georgia.

Such values would roughly 6 degrees below normal. The tight
pressure gradient associated with the high will continue to
support breezy northeast winds through the afternoon. Wind gusts
should top out around 20 mph in most areas, with 25-30 mph
gusts possible at the beaches. We will see a good amount of mid
and upper level clouds in the morning, but this should decrease
through the latter part of the day.

Lake winds: the lake wind advisory for lake moultrie will
continue through 8 am due to gusts to 25 knots across the lake.

Tonight: the synoptic setup remains the same as the center of
the surface high sits to the north just in the lee of the
central appalachians. The forecast is dry and the main story
will be the cool temperatures. The persistent elevated northeast
flow will prevent ideal radiational cooling conditions so
temperatures won't be as low as they could be under different
circumstance. Forecast lows are in the mid 40s well inland,
ranging to the low to mid 50s closer to the coast.

Short term Wednesday through Friday
Strong, dry high pressure will expand southeast across the area
during the period. Weak moisture convergence over the coastal
waters may support isolated showers Wednesday into Thursday. A
building upper ridge Thursday into Friday will yield warming
temperatures and diminishing rain chances over the waters.

Long term Friday night through Monday
A deep layered ridge will maintain mostly dry weather and
seasonable temperatures through Saturday. A southern stream
shortwave will bring increasing moisture and a potential gulf
surface low into the area early next week. This would be our
next chance for measurable rainfall, potentially Sunday but more
likely Monday into Tuesday.

Aviation 08z Tuesday through Saturday
Main concern for this TAF period is the gusty northeast winds.

Gusts should top out around 20 knots through the night.

Gustiness will continue into the afternoon as well.

Extended aviation outlook:VFR.

Marine
Today through tonight: strong northeast flow across the local
waters will persist nearly unchanged today through tonight. The
best cold air advection will take place this morning, and
thermal gradients will diminish a bit through tonight. Solid
small craft advisory conditions will remain through the entire
period. Winds today will generally be 20-25 knots with gusts to
30 knots, with modest weakening overnight. The advisory for the
charleston harbor will run through this evening, and winds will
diminish overnight dropping off to something more like a solid
15 knots. Seas of 4-7 feet are expected out to 20 nm with 7-10
feet beyond.

A persistent NE gradient will continue into Wednesday night,
gradually weakening late week into the weekend as the surface
high builds overhead. Small craft advisory conditions expected
to exist over the nearshore waters into Thursday afternoon,
mainly due to seas, with the offshore ga waters seeing sca
conditions extend into Saturday.

Tides coastal flooding
A coastal flood advisory has been issued for the entire coast
for the upcoming morning high tide. Departures are running a
foot or more and strong northeast winds continue along the
entire coast.

Strong persistent northeast winds will push higher water levels
to the coast this week. Minor coastal flooding will be possible
around the times of high tide continuing into Thursday or
Friday. Coastal flood advisories will likely be needed.

Equipment
Hourly observations and daily climate data from the weather
sensor along riley waterfront park (kcxm) in downtown charleston
will not be available until further notice. The cause of the
senor outage is possibly linked to a bad transmitter at the
site. Technicians continue to evaluate the system for a possible
resolution.

Chs watches warnings advisories
Ga... High rip current risk from 8 am edt this morning through this
evening for gaz117-119-139-141.

Coastal flood advisory until 10 am edt this morning for gaz117-
119-139-141.

Sc... Coastal flood advisory until 10 am edt this morning for
scz048>051.

Lake wind advisory until 8 am edt this morning for scz045.

Marine... Small craft advisory until 5 pm edt Thursday for amz350-352-
354.

Gale warning until 8 am edt this morning for amz374.

Small craft advisory until 8 pm edt this evening for amz330.

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

equipment...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHTS1 8 mi38 min N 17 G 25 61°F 78°F1022.4 hPa
FBIS1 - Folly Island, SC 14 mi26 min N 23 G 26 60°F 1022.7 hPa (+1.6)49°F
41029 - Capers Nearshore (CAP 2) 23 mi78 min NNE 23 G 33 60°F 77°F1020.6 hPa
ACXS1 - ACE Basin Reserve, SC 29 mi101 min N 5.1 58°F 1022 hPa49°F
41033 44 mi78 min NE 23 G 29 65°F

Wind History for Charleston, SC
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston, Charleston Air Force Base, SC4 mi30 minNNE 1210.00 miPartly Cloudy55°F46°F74%1022.8 hPa
Charleston Executive Airport, SC11 mi31 minN 1510.00 miFair57°F46°F67%1022.7 hPa
Mount Pleasant Regional-Faison Field, SC15 mi51 minN 6 G 1410.00 miFair55°F48°F77%1022.7 hPa
Summerville Airport, SC19 mi31 minN 410.00 miFair52°F48°F88%1023.7 hPa
Moncks Corner Berkeley County, SC23 mi31 minNNE 8 G 1510.00 miFair54°F46°F77%1023.7 hPa

Wind History from CHS (wind in knots)
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Last 24hrW3W5W56NW8W9W10N19
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NE11N11N13NE8N11NE10NE11NE11NE12
1 day agoN3N4E4NE5S4CalmS3SE3W3SW5SE7SE7SE5SE4CalmCalmS3CalmCalmS3NW7NW5NW3Calm
2 days agoNE8N6NE8N10N5NE6NE75N6N6N5N6N6NE4E5CalmNE4E3NE4NE3N3N4N3N3

Tide / Current Tables for Drayton, Bee's Ferry, Ashley River, South Carolina
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Drayton
Click for Map
Tue -- 01:14 AM EDT     0.21 feet Low Tide
Tue -- 05:12 AM EDT     Moonrise
Tue -- 07:26 AM EDT     Sunrise
Tue -- 07:30 AM EDT     6.74 feet High Tide
Tue -- 01:35 PM EDT     0.09 feet Low Tide
Tue -- 05:52 PM EDT     Moonset
Tue -- 06:44 PM EDT     Sunset
Tue -- 07:46 PM EDT     6.77 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.90.20.51.63.24.866.66.75.94.62.91.30.30.21.12.74.45.76.66.86.25.13.5

Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
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Charleston Harbor Entrance
Click for Map
Tue -- 01:11 AM EDT     0.01 knots Slack
Tue -- 03:31 AM EDT     1.51 knots Max Flood
Tue -- 05:12 AM EDT     Moonrise
Tue -- 07:25 AM EDT     Sunrise
Tue -- 07:25 AM EDT     -0.00 knots Slack
Tue -- 10:31 AM EDT     -2.67 knots Max Ebb
Tue -- 01:32 PM EDT     0.01 knots Slack
Tue -- 03:43 PM EDT     1.58 knots Max Flood
Tue -- 05:51 PM EDT     Moonset
Tue -- 06:43 PM EDT     Sunset
Tue -- 07:41 PM EDT     -0.00 knots Slack
Tue -- 10:53 PM EDT     -2.64 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1.4-0.20.91.51.51.51.20.4-0.6-1.8-2.6-2.6-1.9-0.70.61.41.61.51.30.7-0.3-1.4-2.3-2.6

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 (7,2,3,4)
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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.