Wednesday, October18, 2017 L-36.com


Marine Weather and Tides
Meggett, 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 6:43PM Wednesday October 18, 2017 7:58 PM EDT (23:58 UTC) Moonrise 5:13AMMoonset 5:28PM Illumination 2% Phase: Waning Crescent; Moon at 28 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- 625 Pm Edt Wed Oct 18 2017
Tonight..NE winds 10 to 15 kt.
Thu..NE winds 10 kt.
Thu night..NE winds 5 to 10 kt.
Fri..NE winds 5 kt.
Fri night..E winds 5 kt.
Sat..E winds 5 to 10 kt.
Sat night..E winds 5 to 10 kt.
Sun..E winds 10 to 15 kt. A slight chance of showers.
Sun night..E winds 10 to 15 kt. A chance of showers.
Mon..SE winds 10 to 15 kt. A chance of showers with a slight chance of tstms.
Mon night..S winds 10 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 75 degrees.
AMZ300 625 Pm Edt Wed Oct 18 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 low pressure system will affect the area early next week.

7 Day Forecast for Marine Location Near Meggett, SC
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location: 32.7, -80.28     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 182236
afdchs
area forecast discussion
national weather service charleston sc
636 pm edt Wed oct 18 2017

Synopsis
Strong high pressure will build over the area through Saturday,
then shift off the coast. A low pressure system will affect the
area early next week.

Near term until 6 am Thursday morning
For the early evening update we made only minor modifications
to hourly temps, sky cover and lows. The biggest changes were
over the marine area where we lowered pop a bit based on radar
trends and more recent guidance.

Surface high pressure is expected to track offshore of the
delmarva peninsula. Also, a secondary high center will develop
along the east facing slopes of the southern appalachians. The
resulting pressure gradient across our area will lead to
northeast winds. The winds will keep temperatures from falling
too dramatically, especially considering skies will be mostly
clear. Lows should range from around 50 degrees far inland to
the lower 60s at the beaches. The only areas that could see
partly cloudy skies and maybe isolated to scattered showers are
the coastal waters. However, the aforementioned wind flow
parallels the coast, which should keep the showers from moving
on land.

Short term 6 am Thursday morning through Saturday
At this sfc, dry high pressure will expand across the southeast
united states with little to no precip chances over a majority of
the area Thursday and Friday. However, a weak trough could develop
just off the georgia and florida coast this weekend, helping advect
deeper moisture to southern areas and producing a few showers over
coastal locations of southeast georgia on Saturday. Otherwise, the
most notable weather will be a warming trend as a mid upper lvl
ridge of high pressure expands from the gulf of mexico late week and
eventually becomes centered over the southeast this weekend. In
general, temps will peak in the upper 70s lower 80s on Thursday,
then lower 80s away from the immediate coast on Friday, followed by
lower middle 80s away from the immediate coast on Saturday.

Overnight lows should dip into the lower middle 50s inland to
lower middle 60s closer to the coast Thursday night and Friday
night.

Long term Saturday night through Wednesday
An upper trough is expected to dig into the central united
states Sunday and Monday, bringing a cold front and potentially
a low pressure system through the area Monday through Tuesday.

Model disagreements are large but confidence is increasing in at
least scattered showers and thunderstorms during the period.

Aviation 00z Thursday through Monday
Vfr.

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

Marine
Few if any changes are necessary with the early evening update,
although looking at forecast soundings and the gradient
potentially tightening a tad overnight, we might need to extend
the ongoing sca's for the 0-20 nm waters about another 4-7
hours. We'll hold off for now since the ongoing forecast is
verifying extremely well in regards to both winds and seas.

Tonight: high pressure is expected to develop along the east
facing slopes of the southern appalachians, with a pressure
gradient in place across our coastal waters. This will lead to
gusty NE winds this evening, with the highest winds beyond 10
nm. Expect hazardous, wind-driven seas, especially beyond 10 nm.

As the night progresses winds are expected to trend downward as
the pressure gradient lowers. Small craft advisories will be in
effect for all of the coastal waters this evening due to
winds seas. Though, as conditions improve the advisories are
expected to expire for the waters from edisto beach, sc to the
altamaha sound, ga within 20 nm after midnight. It's not out of
the question advisory-worthy conditions may remain around 20
nm. But given this very small areal coverage, don't feel this
warrants keeping the advisory going for the entire zone(s).

Thursday through Monday: the pressure gradient will begin to relax
over the coastal waters on Thursday while high pressure builds east.

As a result, northeast winds between 20-25 kts will gradually weaken
to 15-20 kt Thursday night. Seas of 4-6 ft in nearshore waters and 5-
8 ft in offshore georgia waters will also slowly subside. Given the
trend, winds seas should drop below small craft advisory levels
Thursday afternoon in nearshore waters, then in offshore georgia
waters late Friday. Conditions will continue to improve over the
weekend while a southerly flow develops ahead of a low pressure
system approaching from the southeast early next week.

Rip currents... Fairly strong persistent northeast winds, long period
swell from the northeast east and the approaching full moon will
support an elevated risk of rip currents through at least Thursday
and potentially into the weekend. A moderate risk of rip currents
will continue for all beaches into Thursday.

Tides coastal flooding
Based on latest trends and most recent guidance we have opted to
hoist a coastal flood advisory for coastal sections of
charleston, colleton and beaufort counties through 10 pm.

Strong persistent northeast winds along with will maintain a risk
for minor coastal flooding with the high tides through Friday.

Coastal flood advisories will likely be needed.

Chs watches warnings advisories
Ga... None.

Sc... Coastal flood advisory until 10 pm edt this evening for
scz048>050.

Marine... Small craft advisory until 3 am edt Thursday for amz352-354.

Small craft advisory until 5 pm edt Thursday for amz350.

Small craft advisory until 2 am edt Saturday for amz374.

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
ACXS1 - ACE Basin Reserve, SC 13 mi73 min N 1 69°F 1024 hPa59°F
CHTS1 20 mi40 min NE 9.9 G 12 70°F 74°F1024.3 hPa
FBIS1 - Folly Island, SC 21 mi58 min NE 15 G 17 70°F 1024.8 hPa (-0.0)61°F
41033 30 mi50 min ENE 18 G 21 71°F
41029 - Capers Nearshore (CAP 2) 35 mi50 min NE 16 G 21 68°F 75°F1023.6 hPa
FPKG1 - 8670870 - Fort Pulaski, GA 57 mi40 min ENE 14 G 17 71°F 73°F1023.8 hPa

Wind History for Charleston, SC
(wind in knots)    EDIT      (on/off)   Help
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Last
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NE9
N10
G13
N12
N13
G16
N14
G17
N14
G17
N14
G17
N12
G16
N10
G15
N11
G16
N8
G13
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G12
NW7
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G11
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G10
N5
G10
NE7
G11
NW4
G10
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NE8
NE13
G16
NE8
G11
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G12
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N12
G21
N17
G25
N10
G18
N9
G15
N10
G18
N11
G16
N9
G14
N13
G18
N16
G22
N11
G17
N13
G23
N17
G25
N15
G22
N18
G25
N18
G23
N16
G21
N12
G19
N12
G22
N14
G19
N17
G22
NE14
N15
NE12
G15
NE9
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SE6
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SE4
SW2
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SW4
S3
W3
NW2
NW4
G7
NW4
NW3
G6
NW5
G8
W5
SW4
NW4
G9
NW6
G10
NW4
G10
NW6
G10
NW7
G14
N9
N11
G24
N10
G18

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston Executive Airport, SC15 mi63 minNE 610.00 miFair68°F60°F78%1024.4 hPa
Charleston, Charleston Air Force Base, SC20 mi2 hrsNNE 1010.00 miA Few Clouds72°F57°F61%1023.8 hPa
Walterboro Lowcountry Regional Airport, SC24 mi83 minNNE 310.00 miFair68°F55°F64%1024.7 hPa

Wind History from JZI (wind in knots)
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Last 24hrNE7N5N7N6N6N7N9N9
G15
N8N7N9N7N9N10N9N10NE8
G14
NE12N10N8E11
G17
E9
G14
NE7
G12
NE6
1 day agoN13
G21
N12
G20
N11
G17
N12
G20
N10
G18
N11
G17
N14N11
G17
N11
G19
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G16
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G20
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G20
N12
G19
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G22
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G20
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G19
N12N13N11
G16
N13NE12N8
G14
NE9NE6
2 days agoCalmCalmCalmCalmCalmCalmCalmCalmW6W4W4CalmNW4W6W5W5NW6NW7
G14
5NW4N8
G14
N8
G15
N14
G21
N10
G18

Tide / Current Tables for Lower Toogoodoo Creek, 2 mi. above entrance, South Carolina
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Lower Toogoodoo Creek
Click for Map
Wed -- 02:12 AM EDT     0.25 feet Low Tide
Wed -- 06:12 AM EDT     Moonrise
Wed -- 07:27 AM EDT     Sunrise
Wed -- 09:12 AM EDT     8.27 feet High Tide
Wed -- 02:35 PM EDT     0.21 feet Low Tide
Wed -- 06:27 PM EDT     Moonset
Wed -- 06:44 PM EDT     Sunset
Wed -- 09:26 PM EDT     8.00 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.31.30.30.61.73.34.96.57.78.37.96.44.32.10.50.31.22.74.467.27.97.86.6

Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
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Charleston Harbor Entrance
Click for Map
Wed -- 01:57 AM EDT     0.00 knots Slack
Wed -- 04:18 AM EDT     1.62 knots Max Flood
Wed -- 06:10 AM EDT     Moonrise
Wed -- 07:26 AM EDT     Sunrise
Wed -- 08:13 AM EDT     -0.00 knots Slack
Wed -- 11:19 AM EDT     -2.78 knots Max Ebb
Wed -- 02:20 PM EDT     0.01 knots Slack
Wed -- 04:28 PM EDT     1.64 knots Max Flood
Wed -- 06:26 PM EDT     Moonset
Wed -- 06:42 PM EDT     Sunset
Wed -- 08:24 PM EDT     -0.00 knots Slack
Wed -- 11:37 PM EDT     -2.62 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-2.2-1.20.11.21.61.61.51.20.3-0.9-2-2.7-2.6-1.7-0.50.81.61.61.41.10.4-0.6-1.7-2.5

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 (19,4,5,8)
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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.