Thursday, January18, 2018 L-36.com


Marine Weather and Tides
Charleston, 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 7:19AMSunset 5:41PM Thursday January 18, 2018 8:46 AM EST (13:46 UTC) Moonrise 8:20AMMoonset 7:15PM Illumination 3% 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- 624 Am Est Thu Jan 18 2018
Today..NW winds 10 to 15 kt.
Tonight..W winds 5 to 10 kt.
Fri..SW winds 5 to 10 kt.
Fri night..W winds 5 kt.
Sat..W winds 5 kt.
Sat night..W winds 5 kt.
Sun..SW winds 5 kt.
Sun night..SE winds 5 kt.
Mon..SE winds 5 to 10 kt. A slight chance of showers.
Mon night..SW winds 10 kt. A chance of showers. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 45 degrees.
AMZ300 624 Am Est Thu Jan 18 2018
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Cold, dry high pressure will build over the region today and tonight before moderating temperatures occur this weekend into early next week. A cold front will push through the area late Monday into early Tuesday, followed by dry high pressure into mid week. A low pressure system could approach the area during the second half of the week.

7 Day Forecast for Marine Location Near Charleston, SC
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location: 32.78, -79.93     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 181127
afdchs
area forecast discussion
national weather service charleston sc
627 am est Thu jan 18 2018

Synopsis
Cold, dry high pressure will build over the region today and
tonight before moderating temperatures occur this weekend into
early next week. A cold front will push through the area late
Monday into early Tuesday, followed by dry high pressure into
mid week. A low pressure system could approach the area during
the second half of the week.

Near term until 6 pm this evening
Extended the wind chill advisory through 9 am.

Today: the upper-level flow will gradually become zonal today as
the deep upper trough exits off the eastern seaboard. Cold high
pressure with arctic origins will extend across the region
through tonight. Sunny and dry conditions will prevail with
highs ranging from the mid 40s across southeast south carolina
to the upper 40s over southeast georgia. Could see a few spots
north of the i-26 corridor only top out in the lower 40s, but
these should remain fairly isolated. Breezy conditions this
morning will diminish by afternoon as the pressure gradient
between inland high pressure and exiting low pressure gradually
relaxes.

Short term 6 pm this evening through Sunday
Tonight: it will be another cold winter night for the lowcountry
and coastal empire. Although the center of the arctic high is
forecast to remain over the deep south, a surface ridge will
extend east across southern georgia into south coastal south
carolina as a weak lee-side trough induced by westerly flow atop
the southern appalachians remains pinned to the upstate and
north carolina foothills. Light to calm winds within the surface
ridge, very low dewpoints and clear skies will promote strong
radiational cooling with temperatures expected to bottom out in
the lower-mid 20s inland with mid-upper 20s at the coast. Could
see a few upper teens in some of the normally colder locations.

Friday through Sunday: dry high pressure will become centered
over the area Friday, helping produce noticeably warmer
conditions under sunny skies and weak ridging aloft. In general,
temps should peak in the mid 50s. Strong radiational cooling
under clear skies will favor Friday night lows in the upper
20s lower 30s away from the coast. A mid upper lvl low is then
expected to traverse the southeast on Saturday, but moisture
will be very limited, especially in the lower levels where dry
high pressure remains. Given the setup, some mid upper lvl
clouds are possible as the disturbance passes aloft, but precip
is not anticipated. Temps should also be warmer on Saturday as
the atmosphere continues to modify and a light southwest
develops during the afternoon. In general, highs should peak in
the lower 60s Saturday afternoon. Saturday night lows should dip
into the mid upper 30s. Dry high pressure will persist over the
southeast on Sunday. Abundant sunshine will likely produce
another day of warmer temps with afternoon highs peaking in the
mid 60s away from the immediate coast.

Long term Sunday night through Wednesday
High pressure will prevail over the southeast united states into
early next week before a cold front arrives late Monday into early
Tuesday. Ahead of the front, southerly winds will help advect deep
moisture characterized by pwats around 1.3 inches to the southeast
and result in some cloud cover. This could limit overall heating
potential a few degrees, but temps are still expected to peak in the
upper 60s lower 70s Monday afternoon. Chances of showers should then
spread over inland areas Monday afternoon evening before advancing
to the coast with the cold front Monday night. Dry high pressure
will then return behind the departing front on Tuesday and persist
into the middle of next week. Temps will be slightly cooler behind
the front, but should remain a few degrees above normal. In general,
afternoon temps should peak in the lower 60s away from the immediate
coast. Overnight lows should dip to around 40 degrees inland and mid
40s closer to the coast. The next best chance of precip is possible
on Thursday as a low pressure system passes south of region.

Aviation 12z Thursday through Monday
Primary concern:
* none
vfr.

Extended aviation outlook: flight restrictions are possible at
both kchs and ksav terminals late Monday as rain develops along
a passing cold front.

Marine
Today: conditions are improving across the waters. Will let the
small craft advisory expire at 7 am for all nearshore legs with
the exception of the charleston county waters where the advisory
will continue through 10 am. Offshore, nasty conditions continue
and it will take several more hours before conditions subside
below advisory criteria.

Tonight: northwest winds will gradually back to the west
overnight as a surface ridge builds east out of the deep south
and into southern georgia into south coastal south carolina.

Winds will remain less than 15 kt with seas subsiding to 1-2 ft
nearshore and 2-3 ft offshore.

Friday through Tuesday: dry high pressure will prevail over the
coastal waters this weekend into early next week with winds seas
remaining well below small craft advisory levels. In general
west northwest winds will remain at or below 10-15 kt through Sunday
while seas are no higher than 2-3 ft. On Monday, a southerly wind
will develop ahead of a cold front approaching from the west late
Monday into early Tuesday. Winds should approach 15-20 kt while seas
build up to 3-4 ft with fropa. However, small craft advisories are
not anticipated.

Equipment
The kclx radar is out of service until further notice. Repairs
are ongoing. Adjacent radars include: kltx, kcae, kjgx, kvax
and kjax.

The downtown charleston observation site (chls1 kcxm) remains
out of service until further notice.

Chs watches warnings advisories
Ga... Wind chill advisory until 9 am est this morning for gaz116>119-
137>141.

Sc... Wind chill advisory until 9 am est this morning for scz048>052.

Marine..Small craft advisory until 10 am est this morning for amz350.

Small craft advisory until 4 pm est this afternoon for amz374.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHTS1 0 mi52 min NW 8.9 G 16 29°F 46°F1029 hPa
FBIS1 - Folly Island, SC 7 mi106 min NW 8.9 G 16 27°F 1028.4 hPa (+1.6)13°F
41029 - Capers Nearshore (CAP 2) 16 mi98 min NW 18 G 25 26°F 48°F1027.3 hPa
ACXS1 - ACE Basin Reserve, SC 32 mi121 min NW 2.9 25°F 1029 hPa18°F
41033 43 mi98 min NNW 18 G 23 26°F 47°F1028.1 hPa
41004 - EDISTO - 41 NM Southeast of Charleston, SC 48 mi56 min NW 21 G 29 34°F 67°F7 ft1026.7 hPa29°F

Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston Executive Airport, SC7 mi51 minNW 910.00 miFair27°F12°F54%1029.1 hPa
Charleston, Charleston Air Force Base, SC10 mi1.8 hrsNW 1010.00 miFair26°F12°F55%1028.4 hPa
Mount Pleasant Regional-Faison Field, SC11 mi51 minNW 1010.00 miFair27°F15°F64%1029.1 hPa

Wind History from JZI (wind in knots)
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Last 24hrCalmW9NW9NW7W14W13W13W12
G18
W15W14W13W12NW11
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1 day ago5CalmCalmN44SE634CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmW6
2 days agoN9N11N12N12NW8N9N7N7N6CalmCalmCalmCalmCalmCalmCalmCalmNW3N5N4N5CalmN5Calm

Tide / Current Tables for Charleston, South Carolina
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Charleston
Click for Map
Thu -- 02:21 AM EST     -0.17 feet Low Tide
Thu -- 07:21 AM EST     Sunrise
Thu -- 08:19 AM EST     Moonrise
Thu -- 08:46 AM EST     5.51 feet High Tide
Thu -- 02:59 PM EST     0.04 feet Low Tide
Thu -- 05:39 PM EST     Sunset
Thu -- 07:14 PM EST     Moonset
Thu -- 08:49 PM EST     4.65 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.50.5-0.100.92.33.64.75.35.5542.71.40.400.51.62.83.84.54.64.33.4

Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
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Charleston Harbor Entrance
Click for Map
Thu -- 02:55 AM EST     0.00 knots Slack
Thu -- 05:33 AM EST     1.74 knots Max Flood
Thu -- 07:21 AM EST     Sunrise
Thu -- 08:19 AM EST     Moonrise
Thu -- 09:21 AM EST     -0.00 knots Slack
Thu -- 12:31 PM EST     -2.47 knots Max Ebb
Thu -- 03:36 PM EST     0.00 knots Slack
Thu -- 05:38 PM EST     Sunset
Thu -- 05:52 PM EST     1.62 knots Max Flood
Thu -- 07:14 PM EST     Moonset
Thu -- 09:19 PM EST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-2.1-1.7-0.90.111.61.71.41.10.4-0.7-1.7-2.4-2.4-1.7-0.60.41.31.61.30.90.3-0.6-1.5

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.