Sunday, May20, 2018 L-36.com


Marine Weather and Tides
Folly Beach, SC

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 6:15AMSunset 8:16PM Sunday May 20, 2018 9:10 PM EDT (01:10 UTC) Moonrise 10:28AMMoonset 12:00AM Illumination 36% Phase: Waxing Crescent; Moon at 6 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- 643 Pm Edt Sun May 20 2018
Tonight..S winds 10 to 15 kt, diminishing to 5 to 10 kt.
Mon..S winds 5 to 10 kt. A slight chance of tstms. A slight chance of showers in the morning, then a chance of showers in the afternoon.
Mon night..S winds 5 to 10 kt. A chance of showers with a slight chance of tstms.
Tue..S winds 5 to 10 kt. A chance of showers with a slight chance of tstms.
Tue night..S winds 5 to 10 kt. A chance of showers with a slight chance of tstms.
Wed..SW winds 5 kt, becoming S in the afternoon. A chance of showers. A slight chance of tstms in the morning, then a chance of tstms in the afternoon.
Wed night..SW winds 5 to 10 kt. A chance of showers and tstms, mainly in the evening.
Thu..S winds 5 to 10 kt. A chance of showers with a slight chance of tstms.
Thu night..S winds 5 to 10 kt. A chance of showers with a slight chance of tstms.
Fri..SE winds 5 to 10 kt. A chance of showers with a slight chance of tstms.
Fri night..S winds 5 to 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 78 degrees.
AMZ300 643 Pm Edt Sun May 20 2018
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A tropical air mass will remain in place through the week between atlantic high pressure to the east and low pressure to the west.

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 202255
afdchs
area forecast discussion
national weather service charleston sc
655 pm edt Sun may 20 2018

Synopsis
A tropical air mass will remain in place through the week
between atlantic high pressure to the east and low pressure to
the west.

Near term through Monday
Early Sunday evening, adjusted forecasts to account for
ongoing expected precipitation trends and to adjust hourly
temps at sites impacted by showers. While a few showers could
develop just about anywhere within this moist airmass this
evening, in general slight chance chance pops inland to start
should gradually diminish end especially after dark. Then,
expect a mainly rain-free night to prevail as low-level
convergence shifts back along the western wall of the gulf
stream. Could see isolated showers pop up along the lower south
carolina coast a few hours prior to daybreak where some high
mesoscale guidance shows some weakly enhanced surface moisture
convergence developing, but confidence is not high enough to
justify the placement of any mentionable pops at this time.

Could see some fog stratus late, but think there will be enough
high cloudiness in place to keep these elements under control.

It will be warm, humid night with lows ranging from the upper
60s near 70 well inland to the lower-mid 70s at the coast and
beaches, including downtown charleston.

Short term Monday night through Wednesday
In general, the area will remain between atlantic high pressure to
the east and lower pressure and weak upper level troughing to the
west. This pattern, along with adequate deep layer moisture, will
result in scattered to possibly numerous showers each day. Have
continued to minimize the mention of thunder given the model
soundings holding CAPE values to mostly less than 1,000 j kg each
day. Hard to pin down what day has the highest probabilities for
rain, but still looks like moisture and weak upper forcing might be
slightly higher on Tuesday. High temperatures each day near to
slightly above normal, with lows continuing mild above normal, in
the upper 60s to lower 70s.

Long term Wednesday night through Sunday
Atlantic high pressure should extend west over the area through the
period while low pressure persists to the west. This pattern will
maintain the warm and muggy conditions with some heavy rain at
times. In general it looks like temperatures will be near to
slightly above normal.

Aviation 00z Monday through Friday
00z tafs maintain prevailingVFR conditions. However, there is
a chance that moisture could support at least brief MVFR or
lower ceilings late tonight early Monday. Also, confidence in
location timing of showers remains uncertain especially Monday
afternoon. Guidance pops remain lower than recent days, so
latest thinking reflected within 00z tafs is that convection
will remain mainly west of terminals through Monday.

Extended aviation outlook: with the combination of a weak upper
trough lower pressure inland and sufficient tropical moisture,
expect scattered mainly afternoon showers thunderstorms each day
with brief flight restrictions possible.

Marine
Tonight: southerly wind regime will persist with winds 10 kt
or less. Of note, light variable winds produced by a mesohigh
across parts of amz354 and amz374 will give way to SE winds
10-15 kt as the mesohigh dissipates and synoptic offshore high
pressure expands westward. Seas will average 3-4 ft nearshore
waters and 4-5 ft offshore waters.

Monday through Friday: no highlights expected through the
period. Lower pressure will remain inland and higher pressure to
the east. This will maintain a south-southeast winds of 15
knots or less and seas 3 to 5 feet, highest beyond 20 nm
offshore.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... None.

Near term... Spr
short term...

long term...

aviation... Spr
marine... Spr


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FBIS1 - Folly Island, SC 2 mi71 min SW 2.9 G 4.1 75°F 1021.5 hPa (+0.3)71°F
CHTS1 8 mi41 min SW 4.1 G 5.1 76°F 78°F1021.1 hPa
41029 - Capers Nearshore (CAP 2) 19 mi63 min WSW 7.8 G 12 75°F 76°F1021.7 hPa
ACXS1 - ACE Basin Reserve, SC 29 mi86 min Calm 76°F 1021 hPa70°F
41033 37 mi63 min S 3.9 G 7.8 75°F 77°F1020.6 hPa
41004 - EDISTO - 41 NM Southeast of Charleston, SC 45 mi31 min WSW 3.9 G 7.8 74°F1021.3 hPa

Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston Executive Airport, SC5 mi16 minN 010.00 miFair73°F71°F94%1021.3 hPa
Mount Pleasant Regional-Faison Field, SC18 mi36 minN 010.00 miFair73°F71°F94%1021 hPa
Charleston, Charleston Air Force Base, SC18 mi75 minWSW 310.00 miOvercast76°F70°F82%1020.8 hPa

Wind History from CHS (wind in knots)
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Last 24hrS9S8S5S4SW4S5S5S5SE3SE3S5S5--S8S5S9S13SE7S11S9SW7SW6SW3W3
1 day agoS8S8SE7SE7S6S6S12S6CalmS8S8S6SE5Calm--SE3SE4SE11SE11S9SE11SE8SE10S9
2 days agoS13S14
G19
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S13S7S8S8S9S6S8S5S9S10S10S7S8S9S9
G16
S9S12S9SE9

Tide / Current Tables for Folly Island (outer coast), South Carolina
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Folly Island (outer coast)
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Sun -- 12:16 AM EDT     6.12 feet High Tide
Sun -- 12:40 AM EDT     Moonset
Sun -- 06:17 AM EDT     Sunrise
Sun -- 06:42 AM EDT     -0.19 feet Low Tide
Sun -- 11:28 AM EDT     Moonrise
Sun -- 12:58 PM EDT     4.99 feet High Tide
Sun -- 06:51 PM EDT     -0.13 feet Low Tide
Sun -- 08:14 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.165.23.92.410-0.20.51.734.14.854.73.82.51.20.2-0.10.41.63.24.5

Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
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Charleston Harbor Entrance
Click for Map
Sun -- 12:40 AM EDT     Moonset
Sun -- 01:05 AM EDT     -0.00 knots Slack
Sun -- 04:20 AM EDT     -2.77 knots Max Ebb
Sun -- 06:17 AM EDT     Sunrise
Sun -- 07:34 AM EDT     0.00 knots Slack
Sun -- 09:50 AM EDT     1.57 knots Max Flood
Sun -- 11:28 AM EDT     Moonrise
Sun -- 01:32 PM EDT     -0.00 knots Slack
Sun -- 04:42 PM EDT     -2.31 knots Max Ebb
Sun -- 07:42 PM EDT     0.00 knots Slack
Sun -- 08:14 PM EDT     Sunset
Sun -- 10:13 PM EDT     1.77 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
10.1-1.1-2.1-2.7-2.6-1.7-0.60.51.31.61.310.5-0.5-1.5-2.1-2.3-1.7-0.70.31.31.81.6

Weather Map and Satellite Images
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wmap_A
GOES Local Image of Southeast    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Charleston, SC (21,6,7,8)
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Ground Weather Radar Station Charleston, SC
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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.