Sunday, March26, 2017 L-36.com


Marine Weather and Tides
Mount Pleasant, 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 7:12AMSunset 7:37PM Sunday March 26, 2017 4:50 PM EDT (20:50 UTC) Moonrise 5:25AMMoonset 5:15PM Illumination 1% Phase: New Moon; Moon at 29 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- 306 Pm Edt Sun Mar 26 2017
Tonight..SE winds around 5 kt.
Mon..S winds around 5 kt.
Mon night..S winds 5 kt. A slight chance of showers and tstms.
Tue..SW winds 5 to 10 kt. A chance of showers... Mainly in the afternoon. A slight chance of tstms.
Tue night..SW winds 5 to 10 kt. A chance of showers with a slight chance of tstms in the evening.
Wed..W winds 5 kt.
Wed night..S winds 5 kt.
Thu..SE winds 5 to 10 kt. A slight chance of showers and tstms.
Thu night..SE winds 10 kt. A chance of showers and tstms.
Fri..S winds 10 kt. A chance of showers and tstms.
Fri night..S winds 10 kt. A chance of showers with a slight chance of 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...61 degrees.
AMZ300 306 Pm Edt Sun Mar 26 2017
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Atlantic high pressure will weaken early this week. A weak cold front will stall over the area during the middle of the week, then shift back north as a warm front Friday. Another cold front should move through Saturday or Saturday night followed by drier high pressure Sunday.

7 Day Forecast for Marine Location Near Mount Pleasant, SC
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location: 32.93, -79.83     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 261944
afdchs
area forecast discussion
national weather service charleston sc
344 pm edt Sun mar 26 2017

Increased risk for rip currents through mid-week...

Synopsis
Atlantic high pressure will weaken early this week. A weak cold
front will stall over the area during the middle of the week,
then shift back north as a warm front Friday. Another cold front
should move through Saturday or Saturday night followed by
drier high pressure Sunday.

Near term /through tonight/
Through sunset: low-level convergence near the sea breeze coupled
with the tail end of lingering shortwave energy moving into
north carolina has been enough to support a small line of
broken, mostly light showers across the interior this
afternoon. Kclx reflectivity data indicate the updrafts embedded
within this activity are struggling with the presence of a
potent subsidence inversion. Will reintroduce pops across
portions of interior southeast south carolina through late
afternoon to cover. Only expect a hundredth or two to fall where
heavier downpours occur.

Tonight: after dampening slightly in the wake of weak shortwave
energy, mid/upper-level subtropical ridging will rebuild over
the area tonight as atlantic high pressure holds firm. Expect
dry conditions to prevail through daybreak with lows dropping
into the mid-upper 50s inland with lower 60s at the beaches.

Could see some patchy, mainly shallow ground fog develop early
Monday prior to the arrival of a thicker cirrus canopy. The
better chances for fog will be across interior southeast
georgia, but no major impacts are expected.

Short term /Monday through Wednesday/
Monday and Tuesday: weak isentropic lift ahead of a low pressure
system passing to the north will help produce some cloud cover as
moisture deepens over the southeast. However, a light onshore flow
will gradually veer to southwest through Tuesday, suggesting warm
temps well ahead of a cold front approaching from the northwest. In
general, afternoon temps will peak in the lower 80s each day away
from the coast. Temps should be warmer on Tuesday as the southwest
sfc wind and partial downsloping wind aloft hold the seabreeze to
the coast for a longer period than that on Monday. Given these temps
and increasing levels of moisture, a slight chance to chance of
showers will remain in the forecast. A few thunderstorms will also
be possible during peak heating, mainly inland on Monday and in
northern locations Tuesday where instability levels and mid lvl
forcing associated with a h5 shortwave are greatest. Overnight lows
will remain mild Monday and Tuesday nights. In general, temps will
only dip into the upper 50s and lower 60s.

Wednesday: a dry cold front will approach from the northwest well
after its parent low shifts off the mid-atlantic and northeast
coast. The amount of separation between the front and the parent low
suggests the front will stall over or near the area while it becomes
aligned parallel to the mid/upper lvl flow. Ahead of the front,
temps will remain considerably warm under a mid/upper lvl ridge of
high pressure building aloft. In general, temps should peak in the
low/mid 80s away from the immediate coast.

Long term /Wednesday night through Saturday/
The stalled front should shift north as a warm front Friday followed
by a cold frontal passage Saturday or Saturday night. Drier high
pressure should then return later in the weekend. Showers and
thunderstorms will be possible, mainly Thursday through Friday
night, with temperatures running above normal through at least
Saturday.

Aviation /18z Sunday through Friday/
Vfr. Might see some shallow ground fog at both terminals just
before sunrise, but no impacts are anticipated.

Extended aviation outlook: mainlyVFR. Brief flight restrictions are
possible each afternoon with showers and/or thunderstorms this week,
best chances Thursday or Friday. Low probability of restrictions due
to early morning low clouds and/or fog.

Marine
Tonight: south to southeast winds will persist as atlantic high
pressure remains well offshore. Speeds will remain 10 kt or less
with seas 2-4 ft nearshore waters and 4-5 ft offshore waters.

Monday through Friday: winds/seas are expected to remain below small
craft advisory levels as high pressure slowly weakens ahead of weak
cold front arriving from the northwest Wednesday. However, winds
should peak near 15-20 kt at times Tuesday ahead of the front while
seas build up to 3-5 ft, highest in offshore georgia waters. The
front will transition into a warm front as it moves back north
Friday. Seas could reach 6 feet near the gulf stream through Tuesday
due to swells from low pressure well offshore. Advisories will be
possible across the outer ga waters through Tuesday and then for
more of the area Thursday night/Friday as strengthening southerly
winds build seas to 6 feet again.

Rip currents: a moderate risk of rip currents is in the forecast
along all beaches Monday due to long period swell of 2-3 seconds
from the southeast coinciding with the upcoming new moon. The
combination of long period swells, astronomical influences and
onshore winds will support an enhanced risk for rip currents through
mid week.

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

Sc... None.

Marine... None.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHTS1 11 mi51 min SSE 11 G 14 71°F 62°F1021.5 hPa (-1.8)
41029 - Capers Nearshore (CAP 2) 14 mi43 min SE 3.9 G 7.8 67°F 1021.4 hPa
FBIS1 - Folly Island, SC 17 mi51 min SSE 5.1 G 5.1 68°F 1022.2 hPa (-1.6)63°F
ACXS1 - ACE Basin Reserve, SC 42 mi66 min SSE 4.1 77°F 1021 hPa59°F
NIWS1 - North Inlet-Winyah Bay Reserve, SC 45 mi66 min SE 8.9 73°F 1021 hPa58°F
41004 - EDISTO - 41 NM Southeast of Charleston, SC 49 mi61 min SSE 9.7 G 12 72°F 74°F4 ft1021.3 hPa (-1.5)55°F

Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Mount Pleasant Regional-Faison Field, SC3 mi56 minS 10 G 1610.00 miFair75°F57°F54%1021.3 hPa
Charleston, Charleston Air Force Base, SC11 mi1.9 hrsSSW 8 G 1510.00 miPartly Cloudy78°F52°F40%1021.2 hPa
Charleston Executive Airport, SC18 mi56 minSSE 1210.00 miFair77°F59°F54%1021.3 hPa
Moncks Corner Berkeley County, SC21 mi56 minSW 9 G 1510.00 miPartly Cloudy79°F48°F34%1020.3 hPa

Wind History from CHS (wind in knots)
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Last 24hrSE13SE11SE13SE7SE6E5CalmCalmCalmSE8SE5SE4CalmCalmCalmCalmSE4S8S8
G18
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1 day agoSE13SE11SE12SE8SE6SE7SE6SE3CalmNE3CalmSE4SE5CalmCalmCalmSE3SE7SE10SE10SE14
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2 days agoE8E12E12E14E9NE7NE6E9NE6NE6NE6NE6NE8NE8NE4N3NE76SE8SE13
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G18

Tide / Current Tables for Cainhoy, Wando River, South Carolina
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Cainhoy
Click for Map
Sun -- 01:46 AM EDT     -0.15 feet Low Tide
Sun -- 06:24 AM EDT     Moonrise
Sun -- 07:14 AM EDT     Sunrise
Sun -- 08:15 AM EDT     6.60 feet High Tide
Sun -- 02:14 PM EDT     -0.27 feet Low Tide
Sun -- 06:15 PM EDT     Moonset
Sun -- 07:35 PM EDT     Sunset
Sun -- 08:32 PM EDT     6.65 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.30.2-0.10.51.93.656.16.66.45.43.82.10.6-0.201.22.94.65.86.56.65.74.2

Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
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Charleston Harbor Entrance
Click for Map
Sun -- 01:51 AM EDT     0.00 knots Slack
Sun -- 04:19 AM EDT     1.78 knots Max Flood
Sun -- 06:24 AM EDT     Moonrise
Sun -- 07:15 AM EDT     Sunrise
Sun -- 08:07 AM EDT     -0.00 knots Slack
Sun -- 11:17 AM EDT     -2.69 knots Max Ebb
Sun -- 02:17 PM EDT     0.00 knots Slack
Sun -- 04:40 PM EDT     1.92 knots Max Flood
Sun -- 06:15 PM EDT     Moonset
Sun -- 07:35 PM EDT     Sunset
Sun -- 08:20 PM EDT     -0.00 knots Slack
Sun -- 11:35 PM EDT     -2.73 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1.9-0.90.21.21.71.71.410.1-1-2.1-2.7-2.5-1.6-0.40.91.71.91.51.10.4-0.8-1.9-2.6

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 (16,3,4,5)
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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.