Thursday, October19, 2017 L-36.com


Marine Weather and Tides
Folly Beach, 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 7:26AMSunset 6:42PM Thursday October 19, 2017 5:45 PM EDT (21:45 UTC) Moonrise 6:09AMMoonset 6:00PM 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- 322 Pm Edt Thu Oct 19 2017
Tonight..NE winds 10 kt, diminishing to 5 kt after midnight.
Fri..NE winds 5 to 10 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 5 to 10 kt. A chance of showers with a slight chance of tstms.
Sun night..SE winds 5 to 10 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.
Tue..SW winds 15 kt. A chance of showers with a slight chance of tstms.
Tue night..W winds 10 to 15 kt. A slight chance of showers. Mariners are reminded that winds and waves higher in and near tstms. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 74 degrees.
AMZ300 322 Pm 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 Folly Beach, SC
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location: 32.66, -79.92     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 191955
afdchs
area forecast discussion
national weather service charleston sc
355 pm 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 until 6 am Friday morning
A very weak weak 500 mb wave will continue to move over the
region into this evening. Aside from some high clouds, this
won't impact our weather. What will impact our weather is
surface high pressure centered over the southern appalachians.

The resulting surface pressure gradient will allow northeast
winds to prevail. Dry weather and clearing skies are forecasted
for the land areas. A few showers could persist along the gulf
stream, but these won't impact land and will dissipate as the
evening night progresses. Temperatures will be near normal,
falling to around 50 degrees far inland and the lower 60s at
the immediate coast.

Short term 6 am Friday morning through Sunday
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 Friday and Saturday. However, a weak trough should develop
off the georgia and florida coast this weekend, helping turn winds
east southeast and advecting deeper moisture to the region Saturday
night into Sunday. Given the setup, isolated to scattered showers
will be possible with greatest coverage anticipated near the coast
in southeast georgia on Sunday. A few thunderstorms can also not be
ruled during peak heating Sunday afternoon evening. Otherwise, the
most notable weather will be a warming trend that occurs while a
mid upper lvl ridge of high pressure expands from the gulf of mexico
and eventually becomes centered over the southeast this weekend. In
general, temps will peak in the low 80s away from the coast Friday,
then low mid 80s away from the coast on Saturday and Sunday.

Overnight lows should dip into the low mid 50s inland to low mid 60s
closer to the coast Friday night, then around 60 degrees inland to
around 70 degrees near the coast Saturday night.

Long term Sunday night through Thursday
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 19z Thursday through Tuesday
Vfr.

Extended aviation outlook:VFR conditions are expected at both chs
and sav terminals through Saturday. Brief flight restrictions are
possible Sunday with afternoon evening showers. Higher chances of
flight restrictions are possible Monday as a low pressure system
approaches the southeast.

Marine
Tonight: high pressure will be centered over the southern
appalachians. The pressure gradient stretching across the
coastal waters will lower, allowing northeast winds to gradually
ease. Seas will also slowly subside in response to this. A
small craft advisory will remain in effect for amz374 due to
seas.

Friday through Tuesday: the pressure gradient will continue to relax
over the coastal waters on Friday while sfc high pressure shifts off
the mid atlantic coast. As a result, northeast winds and seas will
steadily decrease throughout the day with conditions remaining below
small craft advisory levels for most waters. The only exception will
be over offshore georgia waters where 6 ft seas linger into late
morning early afternoon hours Friday. Northeast winds will then turn
east, before eventually turning southeast early next week as a
coastal trough shifts onshore Sunday well ahead of a low pressure
system advancing toward the southeast united states Monday and
Tuesday. Although wind speeds are expected to remain at or below 15-
20 kt early next week, 6 ft seas could return to offshore georgia
waters ahead of a cold front advancing over the coastal waters
Tuesday.

Rip currents... Steady northeast winds, long period swell from the
east and astronomical influences associated with a recent new moon
should support an elevated risk of rip currents through late this
week, mainly along georgia beaches. A moderate risk of rip currents
will continue for all beaches this evening, then likely for georgia
beaches on Friday.

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 south carolina.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... Small craft advisory until 6 pm edt Friday 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
FBIS1 - Folly Island, SC 2 mi45 min ENE 11 G 12 74°F 1022.4 hPa (-1.3)65°F
CHTS1 8 mi45 min ENE 8.9 G 9.9 76°F 75°F1021.7 hPa (-1.4)
41029 - Capers Nearshore (CAP 2) 19 mi37 min ENE 12 G 16 73°F 73°F1021.4 hPa
ACXS1 - ACE Basin Reserve, SC 29 mi60 min N 1.9 80°F 1022 hPa56°F
41033 37 mi37 min ENE 12 G 16 76°F
41004 - EDISTO - 41 NM Southeast of Charleston, SC 45 mi35 min NNE 16 G 18 75°F 80°F1020.7 hPa67°F

Wind History for Charleston, SC
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NE8
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N11
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N12
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G22
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N17
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NE14
N15

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston Executive Airport, SC5 mi50 minE 810.00 miFair77°F60°F57%1021.7 hPa
Mount Pleasant Regional-Faison Field, SC18 mi70 minENE 410.00 miFair79°F60°F54%1021.7 hPa
Charleston, Charleston Air Force Base, SC18 mi49 minNNE 610.00 miA Few Clouds78°F57°F50%1021.6 hPa

Wind History from CHS (wind in knots)
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Last 24hrNE10N6NE6NE4N6NE5N5NE5N6N5N5NE6N6N5N6N5N9N6NE7NE7N7NE7NE8NE6
1 day agoNE14NE5NE4NE4NE5NE6N6NE7NE8NE8NE9NE10NE8NE8NE9NE11NE9N10NE10NE9NE8NE12NE6NE8
2 days agoN16N10
G23
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G27
NE15
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N12
G20
NE11N11N13NE8N11NE10NE11NE11NE12N11NE12NE14
G18
NE12N13NE12NE16NE13NE14NE11

Tide / Current Tables for Folly Island (outer coast), South Carolina
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Folly Island (outer coast)
Click for Map
Thu -- 01:50 AM EDT     0.08 feet Low Tide
Thu -- 07:08 AM EDT     Moonrise
Thu -- 07:27 AM EDT     Sunrise
Thu -- 08:13 AM EDT     6.28 feet High Tide
Thu -- 02:17 PM EDT     0.11 feet Low Tide
Thu -- 03:12 PM EDT     New Moon
Thu -- 06:41 PM EDT     Sunset
Thu -- 07:00 PM EDT     Moonset
Thu -- 08:22 PM EDT     5.89 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.50.40.10.71.93.54.85.86.36.15.23.82.30.90.10.31.42.84.35.35.85.853.8

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 (17,4,5,8)
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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.