Friday, March24, 2017 L-36.com


Marine Weather and Tides
Meggett, 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 7:15AMSunset 7:35PM Friday March 24, 2017 2:06 AM EDT (06:06 UTC) Moonrise 4:05AMMoonset 3:13PM Illumination 12% 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- 114 Am Edt Fri Mar 24 2017
Rest of tonight..NE winds 5 to 10 kt.
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 114 Am Edt Fri Mar 24 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 Meggett, SC
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location: 32.7, -80.28     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 240203
afdchs
area forecast discussion
national weather service charleston sc
1003 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 the night with mainly clear skies most places, except
for patches of mid and high level clouds west of us-301 in
georgia. 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.

Comparing temps tonight with those 24 hours ago, we see most
places about 5-9f cooler tonight. However, with weak low level
warm advection, minimum 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 /02z Friday 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 be slow in relaxing. Thus we have sca's on the
south carolina waters through 1 am, and the georgia waters out
20 nm til 4 am. The SCA on the outer georgia waters GOES well
beyond the tonight period. Winds have finally dipped below
advisory conditions in charleston harbor, so that advisory is no
longer in effect.

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 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
ACXS1 - ACE Basin Reserve, SC 13 mi81 min N 1 49°F 1032 hPa44°F
CHTS1 20 mi48 min NE 8 G 9.9 55°F 60°F1032.2 hPa
FBIS1 - Folly Island, SC 21 mi66 min ENE 18 G 20 57°F 1032.4 hPa (+0.0)52°F
41033 30 mi58 min ENE 16 G 19 58°F 60°F1031.3 hPa
41029 - Capers Nearshore (CAP 2) 35 mi58 min ENE 18 G 21 57°F 1032 hPa
FPKG1 - 8670870 - Fort Pulaski, GA 57 mi48 min ENE 15 G 19 58°F 60°F1031.3 hPa

Wind History for Charleston, SC
(wind in knots)    EDIT      (on/off)   Help
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Last
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NE19
G26
NE14
G19
NE16
NE16
G20
NE14
G19
N11
G15
N11
G15
N12
G15
NE21
G26
NE21
G30
NE20
NE17
G22
NE19
NE17
G21
NE15
NE16
G21
NE19
G23
NE15
G21
NE10
G15
NE10
NE9
G12
NE9
NE9
G12
NE9
1 day
ago
N5
G10
NW3
SW8
W4
NW3
W6
G9
W6
G10
NW9
G16
NW12
G16
N9
G13
N10
G13
N7
G12
N8
N7
G10
NE16
E15
E15
NE14
NE11
G15
NE11
G15
NE12
NE9
G12
NE14
G17
NE19
G23
2 days
ago
SW9
SW7
G10
SW5
G8
SW5
SW5
SW6
G9
SW8
G11
S7
S4
G7
S6
G11
S9
G13
SW9
G13
SW11
G15
SW9
G15
SW8
G15
SW10
G16
SW9
G14
SW10
G16
SW7
G10
SW6
G9
SW5
G10

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston Executive Airport, SC15 mi11 minNE 910.00 miFair55°F50°F82%1031.8 hPa
Charleston, Charleston Air Force Base, SC20 mi70 minENE 610.00 miFair49°F42°F77%1032.3 hPa
Walterboro Lowcountry Regional Airport, SC24 mi11 minN 010.00 miFair46°F37°F71%1032.5 hPa

Wind History from JZI (wind in knots)
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Last 24hrNE17
G24
NE15NE16
G21
NE11
G19
NE15
G20
NE10
G17
N7
G14
N10NE14
G27
NE19NE17NE19NE15
G20
NE14
G21
NE11
G19
E18NE14
G20
NE10
G18
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G18
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G14
NE7
G13
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G13
NE7NE8
1 day agoCalmSW4S9SW5CalmCalmW8W12N9
G14
N9
G16
N11N11N12
G17
E11E14
G21
E14E12E7
G13
NE8NE11NE7
G13
NE8NE10
G16
NE18
G23
2 days agoS4S7S7S8SW9
G14
SW8S5SW6SW7S9S9--S11S13S14SW13S10SW9S9SW13
G21
SW10
G16
SW9
G17
SW7W22
G29

Tide / Current Tables for Lower Toogoodoo Creek, 2 mi. above entrance, South Carolina
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Lower Toogoodoo Creek
Click for Map
Fri -- 12:20 AM EDT     0.62 feet Low Tide
Fri -- 05:04 AM EDT     Moonrise
Fri -- 07:17 AM EDT     6.78 feet High Tide
Fri -- 07:19 AM EDT     Sunrise
Fri -- 12:58 PM EDT     0.46 feet Low Tide
Fri -- 04:13 PM EDT     Moonset
Fri -- 07:33 PM EDT     6.43 feet High Tide
Fri -- 07:35 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.70.81.62.94.35.56.36.86.65.542.410.50.923.44.85.86.36.35.54.12.4

Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
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Charleston Harbor Entrance
Click for Map
Fri -- 12:11 AM EDT     0.00 knots Slack
Fri -- 02:35 AM EDT     1.36 knots Max Flood
Fri -- 05:03 AM EDT     Moonrise
Fri -- 06:27 AM EDT     -0.00 knots Slack
Fri -- 07:17 AM EDT     Sunrise
Fri -- 09:44 AM EDT     -2.14 knots Max Ebb
Fri -- 12:47 PM EDT     0.00 knots Slack
Fri -- 02:58 PM EDT     1.47 knots Max Flood
Fri -- 04:11 PM EDT     Moonset
Fri -- 06:35 PM EDT     -0.00 knots Slack
Fri -- 07:34 PM EDT     Sunset
Fri -- 09:57 PM EDT     -2.02 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.10.61.31.31.10.90.4-0.5-1.3-2-2.1-1.6-0.80.21.11.51.20.90.4-0.4-1.2-1.8-2-1.7

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 (2,6,7,8)
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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.