Saturday, September23, 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 7:08AMSunset 7:15PM Saturday September 23, 2017 8:55 AM EDT (12:55 UTC) Moonrise 9:16AMMoonset 8:38PM Illumination 8% Phase: Waxing Crescent; Moon at 3 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- 702 Am Edt Sat Sep 23 2017
Today..N winds 5 to 10 kt, increasing to E 10 to 15 kt. Waves building to 1 to 2 ft near the harbor entrance.
Tonight..NE winds 5 to 10 kt.
Sun..NE winds 10 to 15 kt.
Sun night..NE winds 5 to 10 kt.
Mon..N winds 10 kt.
Mon night..N winds 5 to 10 kt.
Tue..N winds 5 to 10 kt.
Tue night..NW winds 5 to 10 kt.
Wed..NW winds 10 kt.
Wed night..W winds 5 kt. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 81 degrees.
AMZ300 702 Am Edt Sat Sep 23 2017
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will prevail through this weekend. The high will weaken and shift inland as hurricane maria tracks northward off the southeast u.s. Coast through the first half of next week. A cold front could approach the forecast area late next week.

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 231115
afdchs
area forecast discussion
national weather service charleston sc
715 am edt Sat sep 23 2017

Synopsis
High pressure will prevail through this weekend. The high will
weaken and shift inland as hurricane maria tracks northward off
the southeast u.S. Coast through the first half of next week. A
cold front could approach the forecast area late next week.

Near term through tonight
Today: an enhancement of deeper moisture along the south ga and
north fl coasts will result in modest moisture advection across
southeast ga, most noticeable to the south of i-16 and
especially closer to the altamaha river entrance. We maintained
a forecast close to previous thinking with chances of showers or
perhaps isolated tstms later today in our far southern zones
but mainly slight chance pops not quite up to i-16, brushing
coastal and southern portions of chatham county. Dry weather
will prevail across most of southeast sc with silent pops along
immediate coastal areas south of charleston. This area is where
an isolated shower could move onshore at some point later this
morning. Highs will be in the upper 80s with the most sunshine
north and more clouds far south. Northeast to east winds will
persist but mainly be light inland from the beaches and barrier
islands.

Tonight: it should be dry all areas as high pressure remains in
control. Some clouds may linger ga zones with mostly clear
skies further north. We cannot rule out some patchy fog again
tonight, but winds look to be more elevated in the boundary
layer and we have not put any fog in our forecast at this point.

Short term Sunday through Tuesday
Dry high pressure will remain situated over the forecast area Sunday
and Monday as hurricane maria travels north offshore. Models are in
good agreement through this period and appear too dry to support
mentionable precipitation over land zones in the forecast. Small
probability exists for periodic showers Tuesday, primarily over the
coastal waters as maria transits past the region. Above normal
temperatures will persist, with highs in the mid to upper 80s and
lows in the mid to upper 60s, around 70 at the beaches.

Long term Tuesday night through Friday
Despite the presence of maria offshore, weak NVA under high pressure
should help mitigate precipitation chances locally, with the best
chances for showers thunderstorms occurring late week into early
next weekend associated with an approaching cold front. The front
appears poised to cross the appalachians Thursday into Friday, with
passage through the forecast area likely by early Saturday. Above
average temperatures are expected through the second half of the
week in advance of the front, with cooler temperatures and lower
dewpoints likely behind the front as cool high pressure builds back
into the area.

Aviation 12z Saturday through Wednesday
Stratus and fog had developed along the coastal corridor this
morning. Ifr conditions looming around both terminals, however
it appears ksav stands the better chance of seeing low cigs
through mid morning. Prior to 14z, the stratus and fog will be
dissipating andVFR conditions will then prevail into tonight.

Rains chances very small at both terminals this afternoon, a
passing shower is certainly possible especially at ksav. Late
tonight, patchy fog and low clouds may again be possible
although soundings at this point are less emphatic on another
occurrence.

Extended aviation outlook: mainlyVFR conditions expected. Low
probability for brief flight restrictions in early morning fog
and or low clouds Saturday morning at either terminal. Low
probability for brief restrictions due to isolated shower and
thunderstorm Saturday afternoon evening, primarily affecting
ksav.

Marine
The long period swell from hurricane maria was arriving this
morning as 41008 up to 4 feet and 41004 recently jumping to 7 feet.

Small craft advisories will be going into effect all near shore
waters by mid morning with the advisory continuing for ga waters
20-60 nm offshore. Winds will also be on a bit of an uptick
today as the gradient gradually becomes a bit tighter thanks to
the moisture gradients between drier air inland and the north-
northwest advancing deep moisture from maria. Small craft advisories
will continue all waters except the chs harbor tonight for building
seas and steady 15-20 knot flow with higher gusts across ga waters,
especially on the outside of the pilot buoy.

Sunday through Wednesday: a prolonged period of small craft
advisories is expected due to high seas pushing into the waters from
offshore hurricane maria. Winds will generally vary NE to N 15 to 20
knots with some gusts to 25 knots anticipated through the early part
of the week before backing NW early Wednesday.

Rip currents: swell from offshore hurricane maria will slowly
build at the beaches. We have increased the risk to high today
as northeast wind look to be on the increase at area beaches
while long period swell builds. Due to the presence of hurricane
maria offshore, increased chances for life-threatening rip
currents will persist into mid-week.

Tides coastal flooding
Powerful surf created by offshore hurricane maria will drive
significant wave run-up, which could cause further beach erosion
this weekend into early next week. High surf advisories may be
required. Also, the potential for shallow salt water flooding
will persist through early next week around the times of high
tide, particularly along the south carolina coast.

Chs watches warnings advisories
Ga... High rip current risk through this evening for gaz117-119-139-
141.

Sc... High rip current risk through this evening for scz048>051.

Marine... Small craft advisory from 11 am this morning to 8 pm edt
Tuesday for amz352.

Small craft advisory from 11 am this morning to 4 pm edt
Wednesday for amz350.

Small craft advisory from 11 am this morning to 11 pm edt
Monday for amz354.

Small craft advisory until 4 pm edt Wednesday for amz374.

Near term...

short term... Jmc
long term... Jmc
aviation... Jmc
marine... Jmc
tides coastal flooding...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FBIS1 - Folly Island, SC 2 mi55 min NNE 9.9 G 11 76°F 1016.5 hPa (+1.0)73°F
CHTS1 8 mi37 min N 6 G 8 79°F 81°F1016.3 hPa
41029 - Capers Nearshore (CAP 2) 19 mi47 min NNE 12 G 16 76°F 81°F1015.7 hPa
ACXS1 - ACE Basin Reserve, SC 29 mi70 min N 1 71°F 1016 hPa71°F
41033 37 mi47 min NNE 12 G 14 78°F 1022.4 hPa
41004 - EDISTO - 41 NM Southeast of Charleston, SC 45 mi25 min NE 14 G 18 80°F 82°F1015.3 hPa71°F

Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston Executive Airport, SC5 mi60 minNNW 33.00 miFog/Mist73°F73°F100%1016.3 hPa
Mount Pleasant Regional-Faison Field, SC18 mi60 minN 03.00 miFog/Mist72°F71°F100%1016.3 hPa
Charleston, Charleston Air Force Base, SC18 mi59 minNNE 56.00 miFog/Mist72°F71°F97%1016.1 hPa

Wind History from JZI (wind in knots)
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Last 24hrN5N6N5CalmE6E5E8NE10E5E4E5CalmCalmCalmCalmCalmCalmCalmN3N4N4N6N6N4
1 day agoW4CalmCalmCalmSE7SE6S8S7S6S7CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmN5CalmN5
2 days agoCalmCalmCalmCalmS7S10S8S8S9S8S6S5S5S4S5CalmCalmCalmCalmCalmCalmCalmCalmCalm

Tide / Current Tables for Folly Island (outer coast), South Carolina
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Folly Island (outer coast)
Click for Map
Sat -- 04:22 AM EDT     0.39 feet Low Tide
Sat -- 07:08 AM EDT     Sunrise
Sat -- 10:16 AM EDT     Moonrise
Sat -- 10:47 AM EDT     5.93 feet High Tide
Sat -- 04:53 PM EDT     0.59 feet Low Tide
Sat -- 07:14 PM EDT     Sunset
Sat -- 09:38 PM EDT     Moonset
Sat -- 10:53 PM EDT     5.48 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.83.62.21.10.40.51.42.745.15.85.95.54.53.21.90.90.61.12.23.54.65.35.5

Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
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Charleston Harbor Entrance
Click for Map
Sat -- 02:06 AM EDT     -2.32 knots Max Ebb
Sat -- 05:10 AM EDT     0.00 knots Slack
Sat -- 07:08 AM EDT     Sunrise
Sat -- 07:32 AM EDT     1.66 knots Max Flood
Sat -- 10:15 AM EDT     Moonrise
Sat -- 11:26 AM EDT     -0.00 knots Slack
Sat -- 02:38 PM EDT     -2.46 knots Max Ebb
Sat -- 05:40 PM EDT     0.00 knots Slack
Sat -- 07:14 PM EDT     Sunset
Sat -- 07:49 PM EDT     1.61 knots Max Flood
Sat -- 09:38 PM EDT     Moonset
Sat -- 11:22 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1.2-1.9-2.3-2-1.2-0.20.91.61.61.41.10.4-0.6-1.6-2.3-2.4-1.8-0.80.41.31.61.30.80.3

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.