Thursday, March23, 2017 L-36.com


Marine Weather and Tides
Charleston, SC

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 7:16AMSunset 7:35PM Thursday March 23, 2017 10:15 PM EDT (02:15 UTC) Moonrise 3:21AMMoonset 2:13PM Illumination 13% Phase: Waning Crescent; Moon at 26 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- 955 Pm Edt Thu Mar 23 2017
Tonight..E winds 15 kt...becoming ne 10 o 15 kt late.
Fri..E winds 5 to 10 kt...becoming se 10 kt in the afternoon.
Fri night..SE winds 5 to 10 kt.
Sat..SE winds 5 to 10 kt.
Sat night..SE winds 5 to 10 kt. A slight chance of showers after midnight.
Sun..S winds 5 kt...increasing to 10 kt in the afternoon. A slight chance of showers. A slight chance of tstms in the afternoon.
Sun night..S winds 5 to 10 kt. A slight chance of showers and tstms.
Mon..SW winds 5 to 10 kt. A slight chance of showers and tstms.
Mon night..S winds 5 to 10 kt. A slight chance of showers and tstms.
Tue..SW winds 5 to 10 kt. A slight chance of showers and tstms.
Tue night..SW winds 5 to 10 kt. A slight chance of showers and tstms. Mariners are reminded that winds and waves can be higher in and near tstms. Unless otherwise noted...waves 1 foot or less. Charleston harbor water temperature...60 degrees.
AMZ300 955 Pm Edt Thu Mar 23 2017
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will build in from the north tonight before shifting over the atlantic Friday into the weekend. The high will weaken early next week...then a cold front could possibly affect the area around mid 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 232315
afdchs
area forecast discussion
national weather service charleston sc
715 pm edt Thu mar 23 2017

Synopsis
High pressure will build in from the north tonight before shifting
over the atlantic Friday into the weekend. The high will weaken
early next week, then a cold front could possibly affect the
area around mid week.

Near term /until 6 am Friday morning/
Tonight: a modified canadian high near the DELMARVA will slip
east tonight, as a strengthening low pressure system occurs east
of the colorado rockies. A very subtle inverted trough will form
closer to the local area, out near the western wall of the gulf
stream during this transition.

We begin this evening with mainly clear skies most places,
except for patches of mid and high level clouds west of i-95.

With a continued onshore fetch in the boundary layer and
isentropic ascent on the 290k surface, these conditions will
support the development of some lower stratus/stratocumulus
overnight, especially across the region south of i-16 in
georgia.

Temps tonight won't be much different than last night, and
actually not too different than what is normal for the last part
of march.

Short term /6 am Friday morning through Sunday/
Friday: deep layered ridging is forecast to prevail with the surface
high center building north of bermuda and the low level ridge axis
across the carolinas. No significant risk of rain anywhere as
the mid level ridge builds atop the forecast area with dry
mid/upper levels. The synoptic flow is onshore and the sea
breeze should progress inland fairly quickly with coastal areas
likely to run a good bit cooler than inland areas by late
afternoon. Highs should average in the mid 70s for much of the
region.

Saturday: model consensus indicates that upper level ridging
extending from florida to coastal ga and the eastern carolinas will
hold strong, maintaining dry and warm weather. Mid levels remain
stable and dry overall with continued gradual moderation of temps.

On Saturday night, despite the approach of a short wave late, models
remain mainly dry. We continued to show slight chances for a few
showers nearing daybreak Sunday to maintain persistence. It will be
milder with increasing clouds on Saturday night.

Sunday: a dampening short wave will lift northeast from ga early,
through the carolinas during the afternoon. Deep layered moisture
will increase a bit with pwats up to 1.25 inches. Upper difluence
will occur early in the day followed by general subsidence in the
afternoon when instability looks to peak. We were comfortable
keeping pops low-end and mainly inland. Temps will continue to climb
to the lower 80s in many and southern areas.

Long term /Sunday night through Thursday/
Conditions appear unsettled across the CWA Sunday night through late
Tuesday. Medium range guidance indicates that a axis of a longwave
trough will ripple across the southeast CONUS early next week. The
forecast area will remain within the warm sector, with weak to
moderate instability developing each afternoon and evening. The
environment appears the most supportive for deep convection late
Tuesday with the passage of the mid level trough and sfc boundary.

Temperatures early next week should start the day around 60 degrees
and peak around 80 by mid afternoon. Thursday and Friday, the
leading edge of a canadian air mass is expected to spread across the
cwa. Conditions should feature dry wx with slightly above normal
temperatures.

Aviation /23z Thursday through Tuesday/
Vfr.

Extended aviation outlook: a few showers and thunderstorms could
develop each afternoon and evening Sunday through Tuesday, but
chances for any lengthy restrictions look low. Patchy early morning
fog is possible each day.

Marine
Tonight: a tight pinching of the e-ne gradient between a cold
front across southern florida and high pressure near the
delmarva will persist longer than originally anticipated. Thus
we have extended the previous sca's on the 0-20 nm waters and in
charleston harbor further into the night. Winds of 20-30 kt
will be common the first 3-6 hours of the forecast period,
diminishing at least 5 kt thereafter as the gradient starts to
slacken. Seas are exceptionally large to begin with, averaging
5-7 ft within 20 nm and 7-9 ft further out, and with the
favorable long duration onshore fetch, they will be slow in
subsiding overnight.

Friday through Tuesday: the center of high pressure will shift over
the western atlantic Friday and Friday night, allowing seas to
decrease to 2 to 4 ft near shore on Friday. The SCA for amz374 is
expected to linger through most of Friday. South to southeast winds
are forecast to remain over the marine zones through the weekend.

Wave guidance suggests some 6 ft seas could linger near the gulf
stream but overall, conditions will be below SCA criteria.

The flow will veer south to southwest early next week with seas
3-4 ft near shore and 4-5 ft offshore, perhaps still a risk for 6
ft seas out near the gulf stream.

Rip currents: a strong northeast wind and a 7-8 second northeast
swell will produce a moderate risk for rip currents through this
evening.

Chs watches/warnings/advisories
Ga... None.

Sc... None.

Marine... Small craft advisory until 10 pm edt this evening for amz330.

Small craft advisory until 1 am edt Friday for amz350-352.

Small craft advisory until 6 pm edt Friday for amz374.

Small craft advisory until 4 am edt Friday for amz354.

Near term...

short term...

long term... Ned
aviation...

marine...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHTS1 0 mi45 min NNE 8 G 11 54°F 60°F1032.6 hPa
FBIS1 - Folly Island, SC 7 mi75 min ENE 20 G 22 55°F 1032.4 hPa (-0.4)45°F
41029 - Capers Nearshore (CAP 2) 16 mi67 min ENE 19 G 25 55°F 1031.9 hPa
ACXS1 - ACE Basin Reserve, SC 32 mi90 min NE 4.1 53°F 1032 hPa43°F
41033 43 mi67 min ENE 19 G 25 57°F 60°F1031.5 hPa
41004 - EDISTO - 41 NM Southeast of Charleston, SC 48 mi85 min ENE 19 G 23 62°F 71°F7 ft1030.7 hPa (+0.4)51°F

Wind History for Charleston, SC
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Last
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NE9
G12
NE14
G17
NE19
G23
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G26
NE14
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NE16
NE16
G20
NE14
G19
N11
G15
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NE21
G26
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G30
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SW7
G10
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N5
G10
NW3
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G9
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G13
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SW5
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G11
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G13
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G15
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G15
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G16
SW9
G14
SW10
G16

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston Executive Airport, SC7 mi20 minNE 710.00 miFair54°F42°F67%1032.5 hPa
Charleston, Charleston Air Force Base, SC10 mi79 minENE 910.00 miA Few Clouds51°F37°F59%1032.4 hPa
Mount Pleasant Regional-Faison Field, SC11 mi40 minN 010.00 miLight Rain50°F41°F71%1032.8 hPa

Wind History from CHS (wind in knots)
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Last 24hrNE7NE9E10E16
G23
E11NE12NE12NE10NE9NE9NE10
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E8E12E12E14E9NE7
1 day agoSW9SW8NW15
G30
N12W5S8W8W6W5S8NW9N12N14
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N15NE11
G18
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E12E12E9
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E4NE6
2 days agoSW4S3S5S4SW6SW6SW6SW6SW5SW7SW10SW8W9W9W5W6W13
G18
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G18
SW13SW15S8S11S9SW8

Tide / Current Tables for Charleston, South Carolina
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Charleston
Click for Map
Thu -- 04:20 AM EDT     Moonrise
Thu -- 04:56 AM EDT     5.03 feet High Tide
Thu -- 07:19 AM EDT     Sunrise
Thu -- 11:18 AM EDT     0.64 feet Low Tide
Thu -- 03:13 PM EDT     Moonset
Thu -- 05:13 PM EDT     4.65 feet High Tide
Thu -- 07:33 PM EDT     Sunset
Thu -- 11:32 PM EDT     0.47 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.32.33.44.24.854.843.121.20.70.81.62.63.64.34.64.53.9321.10.6

Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
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Charleston Harbor Entrance
Click for Map
Thu -- 01:40 AM EDT     1.21 knots Max Flood
Thu -- 04:20 AM EDT     Moonrise
Thu -- 05:30 AM EDT     -0.00 knots Slack
Thu -- 07:18 AM EDT     Sunrise
Thu -- 08:52 AM EDT     -1.88 knots Max Ebb
Thu -- 11:57 AM EDT     0.00 knots Slack
Thu -- 02:04 PM EDT     1.31 knots Max Flood
Thu -- 03:13 PM EDT     Moonset
Thu -- 05:34 PM EDT     -0.00 knots Slack
Thu -- 07:33 PM EDT     Sunset
Thu -- 09:02 PM EDT     -1.68 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.51.11.20.90.70.3-0.4-1.1-1.7-1.9-1.5-0.800.91.31.10.70.3-0.3-1-1.5-1.7-1.5-0.9

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 (22,6,7,8)
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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.