Saturday, September23, 2017 L-36.com


Marine Weather and Tides
Kiawah 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 7:08AMSunset 7:15PM Saturday September 23, 2017 5:55 PM EDT (21:55 UTC) Moonrise 9:17AMMoonset 8:39PM Illumination 11% 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- 353 Pm Edt Sat Sep 23 2017
Tonight..NE winds 10 kt.
Sun..NE winds 10 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 10 kt.
Tue night..N winds 5 to 10 kt.
Wed..NW winds 10 kt.
Wed night..W winds 5 kt.
Thu..NW winds 5 kt.
Thu night..SW winds 5 kt. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 81 degrees.
AMZ300 353 Pm Edt Sat Sep 23 2017
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will prevail this weekend. The high will weaken and shift inland as hurricane maria tracks northward off the southeast u.s. Coast into the first half of next week. A cold front may approach the forecast area late next week.

7 Day Forecast for Marine Location Near Kiawah Island, SC
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location: 32.59, -80.11     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 232013
afdchs
area forecast discussion
national weather service charleston sc
413 pm edt Sat sep 23 2017

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

Near term until 6 am Sunday morning
Until sunset: showers across portions of southeast ga are
diminishing and dry weather should return within the next few
hours.

Tonight: dry weather is forecasted as high pressure remains in
control. Some clouds may linger in ga, with mostly clear skies
further north. We cannot rule out some patchy fog again tonight,
but winds look to high enough that we're keeping it out of the
forecast.

Short term 6 am Sunday morning through Tuesday
Models continue to show a relatively dry forecast through the
period with above normal temperatures. As maria moves northward,
it is still expected to remain well offshore. It will likely
put much of at least the land area under large scale subsidence
on the far western periphery of the circulation associated with
maria. Thus, have continued to keep out mention of any pops over
the land, with only isolated showers and thunderstorms over the
atlantic waters.

Low level winds will be north-northeast 10-15 mph during the day
through Monday, then back to north-northwest Tuesday as the
circulation of maria moves well north and east of the region. Any
afternoon seas breezes are expected to remain with 10-15 miles of
the coast. These winds, along with large scale subsidence, will keep
temperatures above normal, with highs in the mid to upper 80s and
lows in the mid 60s well inland, and lower 70s at the coast.

Long term Tuesday night through Saturday
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 20z Saturday through Thursday
Vfr will prevail into tonight. Late tonight and around daybreak
Sunday, some patchy fog and low clouds are possible. But
confidence and probabilities are too low to include this in the
current tafs.

Extended aviation outlook: expect mainlyVFR conditions to
prevail at both kchs and ksav through early next week. There is
a small probability for some early morning flight restrictions
due to fog into early next week.

Marine
Tonight: swell from maria is moving through our waters. The
noaa buoys are reporting swell ranging from 4-6 ft and periods
anywhere from 11-14 seconds. Swell will continue to gradually
build tonight and small craft advisories are in effect for all
of the coastal waters.

Sunday through Thursday: still expect a prolonged period of
small craft advisories, mainly due to high seas as hurricane
maria tracks northward well off the southeast u.S. Coast later
this weekend and early next week. Winds will be north-northeast
15 to 20 knots through Monday, then backing to northwest 10 to
15 knots Tuesday through Thursday.

Seas will build through Sunday, peaking at 10 to 14 feet beyond 20
nm offshore, and mainly 6 to 10 feet out to 20 nm. Seas remain high
Monday, then start to slowly fall Tuesday and beyond as the
circulation from maria moves well north and east of the waters.

Rip currents: swell from hurricane maria will continue to
slowly build at the beaches as maria moves northward. The high
risk will continue into Sunday, with an elevated risk
persisting into Tuesday or maybe Wednesday.

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 are in
effect Sunday and Monday. 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 Sunday evening for gaz117-119-
139-141.

High surf advisory from 8 am Sunday to 8 pm edt Monday for
gaz117-119-139-141.

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

High surf advisory from 8 am Sunday to 8 pm edt Monday for
scz048>051.

Marine... Small craft advisory until 8 pm edt Tuesday for amz352.

Small craft advisory until 4 pm edt Wednesday for amz350-374.

Small craft advisory until 11 pm edt Monday for amz354.

Near term...

short term...

long term... Jmc
aviation...

marine...

tides coastal flooding...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FBIS1 - Folly Island, SC 13 mi55 min ENE 13 G 15 81°F 1016.1 hPa (-1.1)70°F
CHTS1 16 mi37 min ENE 11 G 13 81°F 82°F1015.5 hPa
ACXS1 - ACE Basin Reserve, SC 18 mi70 min ENE 4.1 87°F 1015 hPa67°F
41033 27 mi47 min ENE 14 G 19 81°F 1020.9 hPa
41029 - Capers Nearshore (CAP 2) 30 mi107 min E 12 G 18 79°F 81°F1015.5 hPa
41004 - EDISTO - 41 NM Southeast of Charleston, SC 54 mi25 min NE 14 G 18 80°F 82°F1014.6 hPa73°F

Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston Executive Airport, SC10 mi60 minE 1010.00 miFair82°F69°F66%1015.2 hPa
Charleston, Charleston Air Force Base, SC23 mi2 hrsESE 710.00 miA Few Clouds86°F66°F53%1015.3 hPa

Wind History from JZI (wind in knots)
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Last 24hrE4E5CalmCalmCalmCalmCalmCalmCalmN3N4N4N6N6N4N7N6NE6
G11
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1 day agoS7CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmN5CalmN5N5N6N5CalmE6E5E8NE10E5
2 days agoS8S6S5S5S4S5CalmCalmCalmCalmCalmCalmCalmCalmCalmW4CalmCalmCalmSE7SE6S8S7S6

Tide / Current Tables for Kiawah River Bridge, South Carolina
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Kiawah River Bridge
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Sat -- 04:40 AM EDT     0.35 feet Low Tide
Sat -- 07:09 AM EDT     Sunrise
Sat -- 10:16 AM EDT     Moonrise
Sat -- 11:13 AM EDT     6.55 feet High Tide
Sat -- 05:08 PM EDT     0.59 feet Low Tide
Sat -- 07:15 PM EDT     Sunset
Sat -- 09:39 PM EDT     Moonset
Sat -- 11:21 PM EDT     6.01 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.74.531.60.60.41.12.43.95.16.16.56.35.442.51.20.60.923.44.65.56

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 (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.