Thursday, April27, 2017 L-36.com


Marine Weather and Tides
Moncks Corner, 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 6:34AMSunset 8:01PM Thursday April 27, 2017 12:58 PM EDT (16:58 UTC) Moonrise 6:43AMMoonset 8:30PM 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- 1027 Am Edt Thu Apr 27 2017
Rest of today..S winds 15 kt.
Tonight..S winds 10 to 15 kt. A slight chance of showers and Thunderstorms after midnight.
Fri..S winds 5 to 10 kt.
Fri night..S winds 5 to 10 kt.
Sat..S winds 5 to 10 kt...increasing to 15 kt in the afternoon.
Sat night..S winds 10 kt.
Sun..S winds 10 to 15 kt.
Sun night..S winds 15 kt.
Mon..S winds 15 to 20 kt. Waves 1 to 2 ft. A chance of showers and Thunderstorms.
Mon night..SW winds 10 to 15 kt. A chance of showers and Thunderstorms. 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...74 degrees.
AMZ300 1027 Am Edt Thu Apr 27 2017
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A weak disturbance is expected to affect the area tonight, followed by high pressure Friday into the weekend. A cold front will move through Monday night, then a stronger storm system will affect the area mid to late week.

7 Day Forecast for Marine Location Near Moncks Corner, SC
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location: 33.1, -79.95     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 271432
afdchs
area forecast discussion
national weather service charleston sc
1032 am edt Thu apr 27 2017

Synopsis
A weak disturbance is expected to affect the area tonight, followed
by high pressure Friday into the weekend. A cold front will move
through Monday night, then a stronger storm system will affect
the area mid to late week.

Near term /through tonight/
10:30 am: no significant changes other than to adjust sky,
temperatures, dew points, and winds to match the current
observations and the expected trends over the next few hours.

Near term models indicate that sfc instability will steadily
increase today, become widespread by this afternoon. However,
forecast soundings east of the fall line show a significant
inversion center near h75. Cams indicate that the convection
will survive the crossing of the southern appalachians late this
morning. In fact, convection is expected to increase during the
mid to late afternoon as it reaches the piedmont. Storm motions
should gradually shift toward the NE this evening as h5 ridge
remains over the western atlantic. At the sfc, the cold front is
forecast to slide over the appalachians, becoming stationary.

Based on forecast moisture and temperature profiles over the
cwa, change in storm motions, and slowing of the cold front i
will reduce pops through today. A few showers and storms may
reach the far inland counties late this afternoon and evening,
but should develop very tall. Also, the deepening mixing and
passage of a seabreeze should provide gusty south winds from mid
day until sunset. Using a blend of temperature guidance, high
temperatures are forecast to range from near 90 over inland ga
to the low 80s over the sea islands.

Tonight, a weak but large area of high pressure will become
centered over the mid appalachians by the pre dawn hours. Low
level south winds will remain steady and the pressure gradient
across the forecast area ranges from 2 to 3 mbs overnight. The
steady return flow should increase sfc dewpoints to the upper
60s to around 70. Weak isentropic flow and increasing llvl
moisture should yield an increasing deck of low stratus,
especially over the inland zones. In addition, weak instability
and low lcls may allow showers and storms to develop over the
marine zones and portions of the tri county tonight. Low
temperatures may only reach around 70 degrees over land and the
low to mid 70s over the water.

Short term /Friday through Sunday/
Strong deep layered ridge will hold strong Friday into Saturday,
resulting in dry conditions and well above-normal temperatures.

We expect to see highs climb into the 90s well inland with upper
80s elsewhere but coastal locales. On Sunday as an upper trough
shifts east, upper height falls will bring highs down a few
degrees, and possibly allow for isolated showers/tstms far
inland.

Long term /Sunday night through Wednesday/
A mature surface cyclone will lift northeast into the great
lakes region Sunday night and Monday, pushing a cold front
through the local area Monday night. A decent channel of
atmospheric moisture ahead of the front will allow scattered to
numerous showers and thunderstorms to move through Monday
afternoon and Monday night. A deeper upper trough moving through
the central united states late week will bring a stronger low
pressure system through the area, accompanied by numerous
showers and tstms.

Aviation /15z Thursday through Monday/
Vfr. Mixing is forecast to deepen over 3 kft by noon. Forecast
soundings indicate that momentum transfer should yield frequent
gusts around 20 kts from the south from mid day through the
afternoon. There could be a period during the early to mid
afternoon that the passage of the seabreeze could elevate gusts
into the mid 20s. Winds should decouple around sunset, with
steady winds from south. Low level south winds will remain
steady and the pressure gradient across the forecast area ranges
from 2 to 3 mbs overnight. The steady return flow should
increase sfc dewpoints to the upper 60s to around 70. Weak
isentropic flow and increasing llvl moisture should yield an
increasing deck of low stratus, increasing in coverage during
the pre dawn. The tafs will feature a tempo from 9z to 12z to
indicate ifr ceilings at kchs and MVFR mist at ksav.

Extended aviation outlook: low ceilings possible Friday night
and Saturday night. Brief ceiling and/or visibility reductions
possible in scattered showers/storms Monday and Monday night.

Marine
A cold front will reach the southern appalachians late this
afternoon and evening. South winds will gradually strengthen
through mid day, developing frequent gusts into the low 20 kts
by this afternoon. A 2-3 mb pressure gradient is expected to
linger over the forecast area tonight, supporting gusts in the
low 20 kts. In fact, a few periods of gusts in the mid 20s are
possible during the mid evening. Wave heights of 4 to 5 feet
will become common beyond 10 nm by this afternoon. Closer to
shore, wave heights should favor the 2 to 3 feet range. Wave
heights could start to lower slightly late tonight. It is
possible that small craft advisory winds and wave heights could
develop this evening, but appears marginal at this time.

Southerly winds will strengthen Sunday night and Monday ahead of
a strong cold front which in turn will build seas. Small craft
advisories likely for most or all of the marine zones during
this period, probably lasting into Monday night.

Rip currents... The combination of swell impacting the beaches, an
afternoon sea breeze, and the upcoming perigean spring tide will
generate a moderate risk of rip currents today.

Tides/coastal flooding
Elevated tides are expected to continue through Saturday, so
more advisories will likely be needed with each evening high
tide.

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

Sc... None.

Marine... None.

Near term...

short term...

long term... Jrl
aviation...

marine...

tides/coastal flooding...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHTS1 22 mi40 min S 12 G 16 78°F 74°F1014.1 hPa
41029 - Capers Nearshore (CAP 2) 27 mi50 min S 7.8 G 9.7 75°F 73°F1013.9 hPa
FBIS1 - Folly Island, SC 29 mi58 min S 7 G 8 74°F 1014.6 hPa (-0.3)69°F
NIWS1 - North Inlet-Winyah Bay Reserve, SC 44 mi133 min WSW 8 76°F 1014 hPa60°F
ACXS1 - ACE Basin Reserve, SC 46 mi133 min S 1.9 78°F 1014 hPa64°F

Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Moncks Corner Berkeley County, SC7 mi63 minSW 10 G 177.00 miMostly Cloudy79°F60°F54%1013.5 hPa
Charleston, Charleston Air Force Base, SC14 mi62 minSSW 1610.00 miMostly Cloudy81°F59°F47%1013.6 hPa
Mount Pleasant Regional-Faison Field, SC17 mi63 minS 11 G 1410.00 miFair81°F62°F54%1013.9 hPa
Summerville Airport, SC18 mi63 minS 510.00 miPartly Cloudy79°F62°F58%1013.9 hPa

Wind History from MKS (wind in knots)
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Last 24hrSW6S8SW8S7S9
G15
S10S4S7S4S4CalmCalmCalmCalmCalmCalmCalmCalmCalmSW5SW6SW9S8S11
1 day agoNW3NW4NW4W3NW4CalmCalmCalmCalmCalmCalmCalmCalmS3CalmSW3S4CalmCalmS3SW7SW5SW6SW6
2 days agoSW10
G15
NE5E4NE5NE5NE7NE5N4CalmW3CalmCalmW3CalmCalmCalmCalmNW3W4CalmW6W3W5NW3

Tide / Current Tables for Pimlico, West Branch, Cooper River, South Carolina
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Pimlico
Click for Map
Thu -- 12:11 AM EDT     2.30 feet High Tide
Thu -- 06:35 AM EDT     Sunrise
Thu -- 07:14 AM EDT     -0.73 feet Low Tide
Thu -- 07:43 AM EDT     Moonrise
Thu -- 12:42 PM EDT     1.97 feet High Tide
Thu -- 07:23 PM EDT     -0.91 feet Low Tide
Thu -- 07:59 PM EDT     Sunset
Thu -- 09:30 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.32.21.91.40.70.1-0.5-0.7-0.600.81.51.921.81.30.70-0.6-0.9-0.8-0.20.71.6

Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
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Charleston Harbor Entrance
Click for Map
Thu -- 12:50 AM EDT     -3.37 knots Max Ebb
Thu -- 03:55 AM EDT     0.00 knots Slack
Thu -- 06:18 AM EDT     2.13 knots Max Flood
Thu -- 06:36 AM EDT     Sunrise
Thu -- 07:43 AM EDT     Moonrise
Thu -- 09:59 AM EDT     -0.00 knots Slack
Thu -- 01:09 PM EDT     -3.07 knots Max Ebb
Thu -- 04:01 PM EDT     0.01 knots Slack
Thu -- 06:39 PM EDT     2.45 knots Max Flood
Thu -- 07:58 PM EDT     Sunset
Thu -- 09:29 PM EDT     Moonset
Thu -- 10:28 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-3-3.4-2.7-1.30.11.42.121.61-0-1.4-2.5-3.1-2.7-1.5-01.32.32.421.50.6-0.8

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 (12,3,4,5)
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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.