Wednesday, June28, 2017 L-36.com


Marine Weather and Tides
North 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 6:13AMSunset 8:33PM Wednesday June 28, 2017 8:14 AM EDT (12:14 UTC) Moonrise 10:09AMMoonset 11:18PM Illumination 20% Phase: Waxing Crescent; Moon at 4 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- 719 Am Edt Wed Jun 28 2017
Today..NE winds 10 kt, becoming E 15 kt this afternoon.
Tonight..E winds 15 kt, diminishing to 5 to 10 kt after midnight.
Thu..E winds 5 to 10 kt. A chance of showers and tstms in the afternoon.
Thu night..SE winds 5 to 10 kt. A chance of showers and tstms.
Fri..SE winds 5 kt. A chance of showers and tstms.
Fri night..S winds 5 kt. A chance of showers and tstms.
Sat..SW winds 5 to 10 kt. A chance of showers and tstms.
Sat night..SW winds 10 kt. A chance of showers and tstms.
Sun..SW winds 5 to 10 kt. A chance of showers and tstms.
Sun night..SW winds 5 to 10 kt. A chance of showers and tstms. Mariners are reminded that winds and waves higher in and near tstms. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 84 degrees.
AMZ300 719 Am Edt Wed Jun 28 2017
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will pass north of the region today, then shift into the atlantic Thursday. A surface trough will develop inland on Friday and prevail into the weekend.

7 Day Forecast for Marine Location Near North Charleston, SC
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location: 32.85, -80.05     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 281121
afdchs
area forecast discussion
national weather service charleston sc
721 am edt Wed jun 28 2017

Synopsis
High pressure will pass north of the region today, then shift
into the atlantic Thursday. A surface trough will develop inland
on Friday and prevail into the weekend.

Near term through tonight
Today: shortwave ridging will move across the area today aloft,
well ahead of the baggy trough analyzed across the gulf of
mexico coast. At the surface, high pressure will build in from
the north and the center of the high is expected to become
centered near the DELMARVA by the late afternoon. Model qpf
fields are quite sparse for the forecast area, and this makes
sense when looking through model soundings. Mid-level
temperatures are quite warm, resulting in very weak lapse rates.

A few model solutions have tried to generate some weak activity
near inland portions of the savannah river, but this just seems
unlikely given the warm profiles. Can't completely rule out an
isolated shower thunderstorms in this region, but its not worth
carrying in the forecast. Onshore easterly flow will prevail
which will help keep temperatures limited to the upper 80s for
highs. We will likely see good coverage of mid high level
clouds, but sky coverage is expected to be on a diminishing
trend by later in the day.

Tonight: moisture will begin to improve, mainly for southeast
georgia near the altamaha river. Models even depict the
development of a weak coastal trough late tonight. Weak
convergence along the line and within some coastal speed
convergence in the onshore flow will likely result in increasing
coverage of showers and thunderstorms along the georgia coast
and atlantic waters by late. Pop's continue to be in the 20-30
percent range. Lows will fall into the upper 60s in the far
north, ranging to the low 70s elsewhere.

Short term Thursday through Saturday
Heights aloft will gradually build through the period as weak
ridging builds in from the south. Moisture will be on the
increase Thursday as surface high pressure shifts offshore and
low level flow backs to south to southwesterly, bringing a
moist, conditionally unstable airmass back into the region.

Shower and thunderstorm initiation will occur mainly along the
seabreeze corridor, but unimpressive lapse rates could limit the
severe threat. However, models continue to show a weak mid-
level wave passing across the area late Thursday, which would
enhance convection coverage and increase the severe threat.

Given the uncertainty of the wave timing, kept pops slightly
above climo Thursday, mainly along and south of i-16, where the
most moisture will be in place. Moisture will have overspread
the entire area Friday as a weak surface through develops
inland. The same is expected on Saturday, so pops remain
slightly above climo for the entire area to reflect this. Storm
initiation is expected each afternoon along the sea breeze.

Temps will be near normal through the period, with most
variations owing to cloud cover and precip coverage.

Long term Saturday night through Tuesday
High pressure will prevail in the atlantic while a surface
trough persists inland. Southerly flow around the high will keep
plenty of moisture advecting into the southeast during this
time period. The result will be the typical summertime
shower thunderstorm pattern.

Aviation 12z Wednesday through Sunday
Vfr conditions expected to prevail through 12z Thursday at kchs
and ksav.

Extended aviation outlook: brief flight restrictions possible
in showers thunderstorms at ksav Thursday, then both ksav and
kchs into the weekend.

Marine
Today and tonight: high pressure to the north and northeast will
result in northeasterly flow this morning across the local
waters. Then by the afternoon the flow will become more easterly
and will increase thanks to a tightening pressure gradient. Wind
speeds area expected to increase into the 15 knot range, with
some 15-20 knots possible across the georgia waters late. No
real change overnight, with prevailing easterly flow. Seas will
be in the 2-4 ft range, highest beyond 20 nm.

Thursday through Sunday: high pressure sliding from the mid-
atlantic coast to its more seasonally typical bermuda high
location will remain in control through the period. Expect
mainly light to moderate breezes, with the usual summertime sea
breeze wind enhancements near the coast in the afternoon. Seas
will remain mainly in the 2 to 3 foot range in small southeast
swell and minor local windswell.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... None.

Near term... Bsh
short term... Ms
long term... Ms
aviation... Bsh ms
marine... Bsh ms


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHTS1 8 mi44 min NNE 11 G 13 76°F 83°F1019.7 hPa
FBIS1 - Folly Island, SC 14 mi74 min NE 11 G 12 76°F 1019.6 hPa (+1.0)68°F
41029 - Capers Nearshore (CAP 2) 23 mi66 min NE 16 G 21 84°F 83°F1018.7 hPa
ACXS1 - ACE Basin Reserve, SC 29 mi89 min Calm 70°F 1019 hPa68°F
41033 44 mi66 min NE 12 G 16 79°F 83°F1018.6 hPa

Wind History for Charleston, SC
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston, Charleston Air Force Base, SC4 mi78 minNE 610.00 miMostly Cloudy71°F64°F79%1019.2 hPa
Charleston Executive Airport, SC11 mi19 minNNE 4 miFair75°F68°F78%1020 hPa
Mount Pleasant Regional-Faison Field, SC15 mi39 minN 39.00 miFair72°F66°F83%1020 hPa
Summerville Airport, SC19 mi19 minN 010.00 miFair70°F64°F83%1020.7 hPa
Moncks Corner Berkeley County, SC23 mi19 minENE 610.00 miFair72°F60°F69%1020.3 hPa

Wind History from CHS (wind in knots)
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Last 24hrCalmN3N5NE54NE74S7SE8SE9S9SE6CalmCalmCalmN4CalmCalmCalmN3N4NE6NE6NE8
1 day agoNE8NE11NE12NE11NE9
G19
E10NE6E8NE5NE5NE7NE7E5CalmCalmCalmCalmCalmN4CalmN3CalmN3Calm
2 days agoNW6NW5NW5W4SW6SW6SW7N13E7N4N3S5CalmS5CalmCalmCalmN5N4CalmNW3N5N3N6

Tide / Current Tables for Drayton, Bee's Ferry, Ashley River, South Carolina
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Drayton
Click for Map
Wed -- 12:35 AM EDT     6.75 feet High Tide
Wed -- 06:14 AM EDT     Sunrise
Wed -- 06:57 AM EDT     -0.42 feet Low Tide
Wed -- 11:09 AM EDT     Moonrise
Wed -- 01:15 PM EDT     5.80 feet High Tide
Wed -- 07:09 PM EDT     -0.13 feet Low Tide
Wed -- 08:32 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.66.764.731.30-0.40.11.42.94.35.35.85.64.73.31.80.5-0.10.21.434.6

Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
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Charleston Harbor Entrance
Click for Map
Wed -- 12:28 AM EDT     -0.00 knots Slack
Wed -- 03:40 AM EDT     -2.77 knots Max Ebb
Wed -- 06:14 AM EDT     Sunrise
Wed -- 06:54 AM EDT     0.00 knots Slack
Wed -- 09:10 AM EDT     1.53 knots Max Flood
Wed -- 11:08 AM EDT     Moonrise
Wed -- 01:00 PM EDT     -0.00 knots Slack
Wed -- 04:05 PM EDT     -2.38 knots Max Ebb
Wed -- 07:08 PM EDT     0.00 knots Slack
Wed -- 08:31 PM EDT     Sunset
Wed -- 09:27 PM EDT     1.61 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.5-0.6-1.8-2.6-2.7-2.1-1.10.11.11.51.51.30.90-1.1-2-2.4-2.1-1.2-0.20.91.51.51.4

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.