Saturday, December16, 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 7:15AMSunset 5:17PM Saturday December 16, 2017 11:46 AM EST (16:46 UTC) Moonrise 5:39AMMoonset 4:27PM Illumination 3% Phase: Waning Crescent; Moon at 28 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- 940 Am Est Sat Dec 16 2017
Rest of today..NE winds 5 kt, becoming se late.
Tonight..Variable winds less than 5 kt.
Sun..SE winds 5 kt.
Sun night..SW winds 5 kt. A slight chance of showers after midnight.
Mon..SW winds 5 kt. A chance of showers.
Mon night..SW winds 5 to 10 kt. A chance of showers, mainly in the evening.
Tue..W winds 5 kt. A slight chance of showers.
Tue night..W winds 5 to 10 kt. A chance of showers.
Wed..N winds 5 kt. A chance of showers.
Wed night..S winds 10 kt. A chance of showers. Unless otherwise noted, waves 1 foot or less. Charleston harbor water temperature 52 degrees.
AMZ300 940 Am Est Sat Dec 16 2017
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will prevail this weekend. A series of disturbances will bring unsettled weather to the region next week.

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 161449
afdchs
area forecast discussion
national weather service charleston sc
949 am est Sat dec 16 2017

Synopsis
High pressure will prevail this weekend. A series of
disturbances will bring unsettled weather to the region next
week.

Near term until 6 pm this evening
No significant changes needed to the previous forecast. High
pressure will extend across the region today with plenty of
sunshine, although there will be a bit of jet-induced cirrus
around. After a cold start with many inland areas near freezing
temperatures will rebound into the mid to upper 50s, which is
several degrees below normal.

Short term 6 pm this evening through Tuesday
Tonight: high pressure will hold its influence on the region has
it meanders east across the south carolina midlands and pee dee
into the north carolina crystal coast. A weak coastal trough
will likely develop off the northeast florida coast, but its
influence on the pressure gradient looks negligible. Expect calm
winds to prevail through the night. Mostly clear skies will
give way to thickening cirrus aloft as yet another slug of
h2-h3 moisture moves across the southeast states. This will have
an impact on lows Sunday morning as radiational processes will
likely be tempered during the diurnal minimum. Generally favored
the warmer side of the guidance envelop for this reason with
lows ranging from the mid 30s well inland to the mid-upper 40s
at the beaches. If the cirrus is slower to expand into the
region or is thinner than expected, then a slightly lowering of
temperatures may be needed in later forecast cycles.

Sunday: the mid upper levels will consist of high pressure generally
located over the bahamas, generating weak ridging and west southwest
flow over the southeast. Meanwhile, a weak disturbance will pass far
to our north during the day and evening. At the surface, high
pressure over the outer banks in the morning will move further
offshore during the day. A front will approach from our west and
northwest, getting closer by the nighttime hours. The air mass
quickly moistens ahead of this front. Pwats are forecasted to rise
to ~1.5" late at night, which is about 2 standard deviations above
normal per naefs. Mid upper level lift isn't overly impressive since
the best dynamics are to our west. But the proximity of the front
and the moisture will allow showers to overspread the area from the
west to east overnight. The highest pops are west of i-95. QPF here
should be a few hundredths at most overnight. Despite increasing
clouds, high temperatures should be a few degrees above normal. Low
temperatures will be well above normal.

Monday: the mid upper levels will consist of weakening high pressure
over the bahamas and cuba, generating weak ridging over the
southeast in the morning that becomes semi-zonal in the afternoon and
overnight. At the surface, a front will stretch from the lower ms
valley into northern ga and upstate sc in the morning, becoming
stationary or barely moving to the east during the day. A saturated
air mass encompassed by ~1.75" pwats during the day (or 2 standard
deviations above normal per naefs) will prevail. Models seem to
indicate the best mid upper level lift just to our west and
northwest. But even with this factored in, showers are still
expected across a good chunk of the area, especially far inland. The
highest pops should remain west of i-95. QPF here should approach
0.25" during the day, while areas east can expect up to 0.1". High
temperatures should be a few degrees above normal in our sc counties
and well above normal in our ga counties. Models indicate showers
decreasing overnight as weak high pressure briefly tries to build in
from the west. But there appears to be enough low level moisture and
dynamics in place to keep a minimal shower threat overnight. Lows
will be well above normal.

Tuesday: the mid upper levels will consist of zonal flow over the
southeast. At the surface, the same front will be located to our
west and northwest in the morning, slowly approaching during the
day. Moisture will remain in place with ~1.5" pwats, which is a bit
lower than the previous day. Once again, models seem to indicate the
best mid upper level lift to our west, approaching our area late in
the day. We have showers in the forecast, with the highest pops west
of i-95. However, the models seemed to have trended a bit slower and
drier with the precipitation. We would not be surprised if both pops
and QPF are overdone and need to be lowered further. High
temperatures on this day should be the warmest for the upcoming
week. But no records are in immediate jeopardy.

Long term Tuesday night through Friday
The pattern will be unsettled. The front will hang around the
southeast Tuesday night while a low develops over the lower ms
valley. The low will pass over the southeast Wednesday, bringing
showers, which could last into the first part of Thursday. The
second part of Thursday may be dry, but another disturbance is
expected to approach on Friday.

Aviation 15z Saturday through Wednesday
Vfr through 12z Sunday.

Extended aviation outlook: periods of flight restrictions are
expected Monday through Wednesday as a series of disturbances move
across the region.

Marine
Today: slightly elevated northerly winds will give way to light
northeast to east winds, especially across the nearshore waters
this afternoon as high pressure moves more overhead. Seas will
slowly subside to 1-2 ft, highest east.

Tonight: northeast winds will increase ever so slightly tonight
as a coastal trough develops off the northeast florida coast
and the center of the high moves into the crystal coast of north
carolina. Winds will remain 5 kt or less across the charleston
county waters with speeds 5 kt or perhaps 5-10 kt across the
georgia and far southern south carolina legs. Seas will average
1-2 ft.

Sunday through Wednesday: high pressure will prevail Sunday. A
series of fronts disturbances will bring unsettled weather to the
region Monday through Wednesday. Though, no marine headlines are
expected.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... None.

Near term... Rjb
short term...

long term...

aviation...

marine...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHTS1 8 mi155 min NW 2.9 G 6 47°F 53°F1026.4 hPa
FBIS1 - Folly Island, SC 14 mi47 min NE 11 G 14 46°F 1027.1 hPa (+1.2)37°F
41029 - Capers Nearshore (CAP 2) 23 mi39 min NE 14 G 19 44°F 55°F1026.2 hPa
ACXS1 - ACE Basin Reserve, SC 29 mi62 min NE 2.9 47°F 1027 hPa32°F
41033 44 mi39 min NE 7.8 G 14 45°F 55°F1026.6 hPa

Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston, Charleston Air Force Base, SC4 mi1.8 hrsNE 810.00 miA Few Clouds45°F30°F56%1026.8 hPa
Charleston Executive Airport, SC11 mi52 minENE 610.00 miFair48°F32°F54%1026.7 hPa
Mount Pleasant Regional-Faison Field, SC15 mi52 minN 010.00 miFair48°F32°F54%1026.7 hPa
Summerville Airport, SC19 mi52 minNE 410.00 miFair45°F28°F53%1027.4 hPa
Moncks Corner Berkeley County, SC23 mi52 minE 37.00 miFair46°F23°F40%1027.1 hPa

Wind History from CHS (wind in knots)
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Last 24hrSW9W11W9W11W7W6SW6W7W8W9W10NW8NW9NW6NW10NW6NW8NW5NW5NW4N6NE7NE84
1 day agoSW7SW7SW8W5SW9SW5S7S5SW4SW6S4SW6SW5SW4SW5W4W5CalmSW3CalmSW3W4W4W8
2 days agoNW6N5W8W7W7SW10S8S8S9S10SW7SW10SW10SW8SW7SW9W8SW9W7W8W8W9W10W9

Tide / Current Tables for Drayton, Bee's Ferry, Ashley River, South Carolina
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Drayton
Click for Map
Sat -- 12:47 AM EST     -0.03 feet Low Tide
Sat -- 05:37 AM EST     Moonrise
Sat -- 07:15 AM EST     6.40 feet High Tide
Sat -- 07:16 AM EST     Sunrise
Sat -- 01:26 PM EST     0.11 feet Low Tide
Sat -- 04:27 PM EST     Moonset
Sat -- 05:15 PM EST     Sunset
Sat -- 07:18 PM EST     5.43 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.2-00.61.93.44.85.96.46.25.342.410.20.21.22.53.94.95.45.34.53.32

Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
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Charleston Harbor Entrance
Click for Map
Sat -- 12:43 AM EST     0.00 knots Slack
Sat -- 03:05 AM EST     1.55 knots Max Flood
Sat -- 05:36 AM EST     Moonrise
Sat -- 07:08 AM EST     -0.00 knots Slack
Sat -- 07:15 AM EST     Sunrise
Sat -- 10:15 AM EST     -2.51 knots Max Ebb
Sat -- 01:16 PM EST     0.01 knots Slack
Sat -- 03:14 PM EST     1.45 knots Max Flood
Sat -- 04:26 PM EST     Moonset
Sat -- 05:15 PM EST     Sunset
Sat -- 07:01 PM EST     -0.00 knots Slack
Sat -- 10:24 PM EST     -2.08 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.80.31.21.51.51.410.1-0.9-1.9-2.5-2.3-1.5-0.30.81.41.31.10.70-0.8-1.5-2-2

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 (11,2,3,4)
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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.