Friday, September22, 2017 L-36.com


Marine Weather and Tides
Sullivan's Island, 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 7:07AMSunset 7:16PM Friday September 22, 2017 1:04 PM EDT (17:04 UTC) Moonrise 8:20AMMoonset 8:02PM Illumination 4% Phase: Waxing Crescent; Moon at 2 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- 1239 Pm Edt Fri Sep 22 2017
This afternoon..E winds 10 kt. A slight chance of showers and tstms.
Tonight..E winds 10 kt, becoming ne 5 to 10 kt after midnight.
Sat..NE winds 5 to 10 kt.
Sat night..NE winds 5 to 10 kt.
Sun..NE winds 5 to 10 kt.
Sun night..NE winds 5 to 10 kt.
Mon..N winds 5 to 10 kt.
Mon night..N winds 5 kt.
Tue..N winds 5 to 10 kt.
Tue night..NW winds 5 to 10 kt. Mariners are reminded that winds and waves higher in and near tstms. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 80 degrees.
AMZ300 1239 Pm Edt Fri Sep 22 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 Sullivan's Island, SC
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location: 32.77, -79.91     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 221456
afdchs
area forecast discussion
national weather service charleston sc
1056 am edt Fri sep 22 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: sfc high pressure will remain centered north of the area
while a mid upper lvl trough of low pressure lingers over the
southeast united states. Currently, some low clouds patchy fog
remain over parts of the area, but is expected to lift mix out as
sfc temps begin to warm and the low-lvl inversion breaks within
an hour. Once clouds scatter late morning, the main issue will
be how quick sfc temps warm up for afternoon convection. A light
northeast wind should keep temps slightly cooler than the previous
day. However, a few showers thunderstorms are anticipated
during peak heating this afternoon, mainly as winds become more
directly onshore and pwats peak around 1.5 inches. Coverage
appears to be somewhat limited and less vigorous than the
previous day due to less SBCAPE and dcape across the region.

Highest precip coverage should occur over inland areas. High
temps will range in the mid upper 80s, warmest away from the
immediate coast.

Tonight: isolated early evening convection is possible well
inland but mainly prior to sunset. Skies will be clear to
partly cloudy with lows in the mid to upper 60s. Patchy fog is
possible once again, especially inland from the u.S. 17
corridor.

Short term Saturday through Monday
Dry high pressure will settle over the forecast area. On Saturday,
relatively higher ambient moisture will support a slight chance for
shower thunderstorm activity mainly across georgia zones, with south
carolina zones appearing mostly dry based on the latest guidance.

Sunday and Monday appear too dry to support mentionable precipitation
over land zones in the forecast. Above normal temperatures are
expected, with highs in the mid to upper 80s and lows in the mid
to upper 60s, around 70 at the beaches.

Long term Monday night through Thursday
Inland high pressure will persist through early next week while
hurricane maria is forecast to remain offshore of the southeast u.S.

Coast as it tracks north through the middle of next week. While some
showers could skirt coastal areas early next week as maria passes
by, persistent, weak NVA under high pressure should help
mitigate precipitation chances. For much of the week, mainly dry
conditions are anticipated with temperatures likely remaining
above normal.

Aviation 15z Friday through Tuesday
Shallow ground fog and thin stratus layers will persist until an
inversion breaks around 15z. Thus, ifr CIGS will likely become
prevailingVFR by late morning.VFR conditions will then likely
prevail at both chs and sav terminal this afternoon evening.

However, a shower or thunderstorm could impact either terminal
mid afternoon evening. Additional flight restrictions will be
possible at either terminal late tonight and or around daybreak
due to patchy fog.

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
Today and tonight: high pressure will prevail over the coastal
waters today, but the pressure gradient will begin to enhance this
afternoon into tonight while hurricane maria tracks north well off
the southeast coast. In general, northeast winds around 10 kt will
become east 10-15 kt. Long period swells from maria will also
begin to impact georgia waters, supporting a small craft advisory
for hazardous seas in offshore georgia waters this afternoon.

Seas should peak near 5-8 ft in offshore georgia waters tonight.

Elsewhere, seas ranging between 2-3 ft today will build up to
3-5 ft after midnight.

Saturday through Tuesday: seas 6 ft and building are expected to
push into nearshore waters by early Saturday morning due to swell
from offshore hurricane maria. A prolonged period of small craft
advisories is expected. Generally NE winds 10-15 knots with some
gusts to 20 knots are anticipated through early next week.

Rip currents: swell from offshore hurricane maria will slowly build
at the beaches. This results in a moderate risk of rip currents
today and will we likely maintain moderate to high risks through
early to mid next 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... None.

Sc... None.

Marine... Small craft advisory for hazardous seas from 2 pm this
afternoon to 6 am edt Wednesday for amz374.

Near term... Dpb
short term... Jmc
long term... Jmc
aviation... Dpb jmc
marine... Dpb jmc
tides coastal flooding...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHTS1 1 mi47 min ESE 5.1 G 6 82°F 81°F1017.7 hPa
FBIS1 - Folly Island, SC 6 mi65 min ENE 7 G 8.9 81°F 1018.3 hPa (+0.0)74°F
41029 - Capers Nearshore (CAP 2) 15 mi117 min ENE 7.8 G 12 79°F 81°F1017.5 hPa
ACXS1 - ACE Basin Reserve, SC 32 mi80 min NE 2.9 84°F 1018 hPa72°F
41033 43 mi57 min ENE 9.7 G 12 79°F 1024.7 hPa
41004 - EDISTO - 41 NM Southeast of Charleston, SC 47 mi35 min NNE 9.7 G 12 79°F 1016.6 hPa73°F

Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston Executive Airport, SC7 mi70 minNNE 510.00 miFair84°F73°F70%1017.6 hPa
Mount Pleasant Regional-Faison Field, SC11 mi70 minN 010.00 miFair82°F73°F74%1017.6 hPa
Charleston, Charleston Air Force Base, SC12 mi69 minVar 49.00 miPartly Cloudy84°F73°F70%1017.6 hPa

Wind History from JZI (wind in knots)
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Last 24hrSE7SE6S8S7S6S7CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmN5CalmN5N5N6N5Calm
1 day agoS7S10S8S8S9S8S6S5S5S4S5CalmCalmCalmCalmCalmCalmCalmCalmCalmW4CalmCalmCalm
2 days ago6NW6W7SE5S6S7S4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm

Tide / Current Tables for Fort Johnson, South Carolina
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Fort Johnson
Click for Map
Fri -- 03:54 AM EDT     0.17 feet Low Tide
Fri -- 07:07 AM EDT     Sunrise
Fri -- 09:19 AM EDT     Moonrise
Fri -- 10:07 AM EDT     6.00 feet High Tide
Fri -- 04:21 PM EDT     0.30 feet Low Tide
Fri -- 07:15 PM EDT     Sunset
Fri -- 09:02 PM EDT     Moonset
Fri -- 10:16 PM EDT     5.70 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.32.91.50.50.20.71.93.44.75.665.84.93.72.210.30.51.42.94.25.25.75.5

Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
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Charleston Harbor Entrance
Click for Map
Fri -- 01:27 AM EDT     -2.58 knots Max Ebb
Fri -- 04:31 AM EDT     0.00 knots Slack
Fri -- 06:50 AM EDT     1.73 knots Max Flood
Fri -- 07:07 AM EDT     Sunrise
Fri -- 09:19 AM EDT     Moonrise
Fri -- 10:45 AM EDT     -0.00 knots Slack
Fri -- 01:55 PM EDT     -2.67 knots Max Ebb
Fri -- 04:55 PM EDT     0.00 knots Slack
Fri -- 07:06 PM EDT     1.71 knots Max Flood
Fri -- 07:15 PM EDT     Sunset
Fri -- 09:02 PM EDT     Moonset
Fri -- 10:48 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1.8-2.5-2.5-1.7-0.60.61.51.71.51.30.8-0.3-1.4-2.3-2.7-2.2-1.10.11.21.71.51.10.7-0.2

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
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GOES Local Image of Southeast    EDIT
Geos

Wind Forecast for Charleston, SC (13,3,4,5)
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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.