Thursday, October19, 2017 L-36.com


Marine Weather and Tides
Summerville, 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 7:27AMSunset 6:43PM Thursday October 19, 2017 10:27 AM EDT (14:27 UTC) Moonrise 6:10AMMoonset 6:01PM Illumination 1% 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- 1005 Am Edt Thu Oct 19 2017
Rest of today..NE winds 10 kt.
Tonight..NE winds 5 to 10 kt.
Fri..NE winds 5 to 10 kt.
Fri night..E winds 10 kt.
Sat..E winds 10 to 15 kt.
Sat night..E winds 10 to 15 kt.
Sun..E winds 10 to 15 kt. A slight chance of showers and tstms.
Sun night..SE winds 10 to 15 kt. A chance of showers with a slight chance of tstms.
Mon..SE winds 10 to 15 kt. A chance of showers and tstms.
Mon night..S winds 10 to 15 kt. A chance of showers with a slight chance of 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 73 degrees.
AMZ300 1005 Am Edt Thu Oct 19 2017
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Strong high pressure will build over the area through Saturday, then shift off the coast. A cold front will move through the area on Tuesday.

7 Day Forecast for Marine Location Near Summerville, SC
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location: 32.96, -80.2     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 191424
afdchs
area forecast discussion
national weather service charleston sc
1024 am edt Thu oct 19 2017

Synopsis
Strong high pressure will build over the area through Saturday,
then shift off the coast. A cold front will move through the
area on Tuesday.

Near term through tonight
As of 1025 am: the only changes with this update were to adjust
the temperature, dew point, and sky cover grids slightly to
reflect the current observations and the expected trends for the
next few hours. Everything else is on track.

A weak h5 trough will ripple over the CWA late this afternoon
and this evening. During the overnight hours, the center of 590
dm ridge will drift east over the deep south, the ridge axis
north over the southern appalachians. At the sfc, high pressure
is expected to remain centered over the western carolinas,
building slightly east. The air mass will remain dry, pw around

70 today decreasing to less than 5 tonight. Expect clear to
mostly clear skies. Any cloud cover and mentionable pops will
remain over the marine areas. Using a blend of temperature
guidance, high temperatures are forecast to range around 80
degrees this afternoon and cooling into the 50s tonight.

Short term Friday through Sunday
A deep layered ridge will remain over the southeast united
states Friday into Saturday before shifting off the coast on
Sunday. As the surface high shifts off the coast late Saturday
through Sunday, onshore flow will develop and low-level
dewpoints will rise into the 60s. A weak coastal trough
developing over the georgia waters may produce isolated showers,
potentially shifting into coastal georgia Saturday night. A weak
shortwave approaching the area from the west, combined with
deepening moisture, may produce scattered showers or an isolated
thunderstorm on Sunday. High temps are expected to reach the low
to mid 80s each day, highest far southwest.

Long term Sunday night through Wednesday
A potent upper low will affect the area Monday into Tuesday,
pushing a cold front through the area late Tuesday. Good chance
for showers and tstms along and ahead of the cold front,
followed by drying and eventually cooler temps as high pressure
builds from the west and north.

Aviation 14z Thursday through Monday
Vfr.

Extended aviation outlook:VFR conditions are expected at both
chs and sav terminals through this weekend.

Marine
Today and tonight: winds and seas will remain elevated into this
afternoon given a continued pressure gradient across the local
waters, 2-3 mb spread from near the santee river and the altamaha
river. The pressure gradient will begin to relax over the
coastal waters during the mid and late afternoon while high
pressure builds east. As a result, northeast winds will
gradually weaken late today into tonight. Seas will also slowly
subside. Winds seas should drop below small craft advisory
levels this afternoon in nearshore waters, lingering across the
offshore georgia waters.

Moderate NE winds will persist through the weekend before
shifting to E and eventually SE early next week as the surface
high pressure system pushes off the mid-atlantic coast. Seas
should drop below 6 ft over the offshore ga waters late fri
afternoon, but will likely build back above 6 ft Sunday through
early to mid next week due to increasing fetch.

Rip currents... Steady northeast winds, long period swell from the
northeast east, and new moon influences will support an elevated risk
of rip currents through late this week. A moderate risk of rip
currents will continue for all beaches today.

Tides coastal flooding
Persistent northeast winds and astronomical factors will lead to
a risk for minor coastal flooding during the morning high tides
through Saturday, mainly in southeast sc.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... Small craft advisory until 2 pm edt this afternoon for amz352-
354.

Small craft advisory until 6 pm edt Friday for amz374.

Small craft advisory until 5 pm edt this afternoon for amz350.

Near term...

short term...

long term... Jrl
aviation...

marine...

tides coastal flooding...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHTS1 19 mi40 min NNW 7 G 9.9 67°F 73°F1024.2 hPa
FBIS1 - Folly Island, SC 25 mi28 min NNE 13 G 13 66°F 1024.7 hPa (+1.2)60°F
ACXS1 - ACE Basin Reserve, SC 31 mi103 min N 2.9 60°F 1024 hPa55°F
41029 - Capers Nearshore (CAP 2) 32 mi80 min NNE 16 G 19 64°F 73°F1023.3 hPa
41033 48 mi80 min NNE 16 G 21 68°F

Wind History for Charleston, SC
(wind in knots)    EDIT      (on/off)   Help
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NW6
G10
N5
G10
NE7
G11
NW4
G10
N5
NE8
NE13
G16
NE8
G11
NE9
G12
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N6
G10
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G10
NW6
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N6
G10
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G16
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G9
1 day
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N16
G21
N12
G19
N12
G22
N14
G19
N17
G22
NE14
N15
NE12
G15
NE9
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G13
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G16
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G17
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G17
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G17
N12
G16
N10
G15
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G16
N8
G13
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G12
NW7
G10
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G11
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SW4
NW4
G9
NW6
G10
NW4
G10
NW6
G10
NW7
G14
N9
N11
G24
N10
G18
N12
G21
N17
G25
N10
G18
N9
G15
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G18
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G16
N9
G14
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G18
N16
G22
N11
G17
N13
G23
N17
G25
N15
G22
N18
G25
N18
G23

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Summerville Airport, SC8 mi33 minN 510.00 miFair61°F53°F77%1025.7 hPa
Charleston, Charleston Air Force Base, SC10 mi92 minN 510.00 miFair61°F55°F81%1024.1 hPa
Moncks Corner Berkeley County, SC18 mi53 minN 610.00 miFair63°F53°F73%1025.1 hPa
Charleston Executive Airport, SC21 mi33 minN 6 G 1210.00 miFair68°F59°F73%1024.4 hPa
Mount Pleasant Regional-Faison Field, SC23 mi53 minN 510.00 miFair64°F57°F78%1024.4 hPa
Walterboro Lowcountry Regional Airport, SC24 mi53 minN 510.00 miFair59°F51°F77%1025.4 hPa

Wind History from DYB (wind in knots)
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Last 24hrN7NE6N4NE5N8N5NE4N4CalmCalmCalmCalmCalmCalmCalmCalmCalmN3CalmN3CalmCalmN4N7
1 day agoNE10
G20
N13
G18
NE9
G17
NE9
G16
N13
G17
N9
G15
NE9N6CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmN3NE4N7
2 days agoW6W6W5W8N6N9N11
G25
N12
G15
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G19
N10
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N8N7N5N6N6N5N6N5N8N6N4N4NE6N10

Tide / Current Tables for Bacon Bridge, Ashley River, South Carolina
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Bacon Bridge
Click for Map
Thu -- 05:45 AM EDT     0.01 feet Low Tide
Thu -- 07:09 AM EDT     Moonrise
Thu -- 07:28 AM EDT     Sunrise
Thu -- 11:06 AM EDT     2.50 feet High Tide
Thu -- 03:12 PM EDT     New Moon
Thu -- 06:12 PM EDT     0.02 feet Low Tide
Thu -- 06:42 PM EDT     Sunset
Thu -- 07:01 PM EDT     Moonset
Thu -- 11:15 PM EDT     2.34 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.21.81.40.90.40.100.41.11.82.32.52.42.11.71.20.60.200.20.81.52.12.3

Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
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Charleston Harbor Entrance
Click for Map
Thu -- 02:39 AM EDT     0.00 knots Slack
Thu -- 04:59 AM EDT     1.70 knots Max Flood
Thu -- 07:08 AM EDT     Moonrise
Thu -- 07:26 AM EDT     Sunrise
Thu -- 08:57 AM EDT     -0.00 knots Slack
Thu -- 12:04 PM EDT     -2.82 knots Max Ebb
Thu -- 03:04 PM EDT     0.00 knots Slack
Thu -- 03:12 PM EDT     New Moon
Thu -- 05:11 PM EDT     1.68 knots Max Flood
Thu -- 06:41 PM EDT     Sunset
Thu -- 07:00 PM EDT     Moonset
Thu -- 09:03 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-2.6-1.9-0.80.41.41.71.61.51-0-1.2-2.3-2.8-2.4-1.4-0.11.11.71.61.30.90.1-1-1.9

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 (10,2,3,4)
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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.