Wednesday, August21, 2019 L-36.com


Marine Weather and Tides
Mount Pleasant, SC

Version 3.4
NOTICE
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:45AMSunset 7:59PM Wednesday August 21, 2019 8:45 PM EDT (00:45 UTC) Moonrise 10:33PMMoonset 11:04AM Illumination 61% Phase: Waning Gibbous; Moon at 21 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- 606 Pm Edt Wed Aug 21 2019
Tonight..SW winds 15 kt with gusts to 20 kt early, diminishing to 5 to 10 kt. Waves locally 1 to 2 ft. A chance of showers and tstms this evening.
Thu..SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts to 20 kt in the afternoon. A slight chance of showers and tstms.
Thu night..SW winds 10 to 15 kt. A slight chance of showers and tstms.
Fri..SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts to 20 kt in the afternoon. A chance of showers and tstms.
Fri night..S winds 10 to 15 kt, becoming sw 5 to 10 kt after midnight. A chance of showers and tstms.
Sat..SW winds 5 kt, becoming S in the afternoon. A chance of showers and tstms.
Sat night..S winds 5 to 10 kt. A chance of showers and tstms.
Sun..E winds 5 to 10 kt. Showers and tstms likely.
Sun night..E winds 5 to 10 kt. A chance of showers and tstms.
Mon..E winds 5 to 10 kt. A chance of showers and tstms.
Mon night..SE 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 86 degrees.
AMZ300 606 Pm Edt Wed Aug 21 2019
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Atlantic high pressure and an inland trough will prevail through late week. A cold front will then push into the area this weekend before stalling over or just south of the area through early next week.


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 212220
afdchs
area forecast discussion
national weather service charleston sc
620 pm edt Wed aug 21 2019

Synopsis
Atlantic high pressure and an inland trough will prevail
through late week. A cold front will then push into the area
this weekend before stalling over or just south of the area
through early next week.

Near term until 6 am Thursday morning
Boundary collisions and moderately unstable conditions are
supporting scattered showers tstms across the interior early
this evening. Tstms will linger for a few more hours before
diminishing with the loss of insolation. Pops were adjusted
slightly for the next several hours to take current radar and
mesoscale trends into account. Expect mainly dry conditions
overnight with debris cloudiness gradually diminishing with
time. Similar to the past several nights, some marine-based
stratocumulus is expected to move inland from off the atlantic,
especially at the beaches. Lows will range from the mid 70s
inland to around 80 at the beaches and downtown charleston.

Short term 6 am Thursday morning through Saturday
The mid-level pattern will be in transition with troughing to our
north, high pressure to our southeast dissipating, and low pressure
even further to our southeast approaching as time progresses. At the
surface, our area will remain between high pressure in the atlantic
and a trough inland Thursday and Friday. By Saturday a cold front
will approach from the north, but models currently show it remaining
just north of our area during the daylight hours. Moisture will
gradually increase throughout the short term. Pwats will start ~2"
on Thursday, gradually increasing into Saturday. There are hints at
a band of 2.5" pwats approaching our area from the north, ahead of
the front on Saturday. The thunderstorm threat on Thursday is low,
with only a brief period of chance pops forecasted along the sea
breeze late in the afternoon. Friday the parameters improve
(moisture, lift, etc.), so we have pops a bit higher, into the
chance category for most of the area during the afternoon. On
Saturday pops increase from north to south, especially in the
afternoon. The highest pops are in the north near the approaching
front, where we have likely pops. These will need to be adjusted
with the upcoming forecasts. The risk of severe thunderstorms is
low. Though, heavy rainfall is possible due to the abundant
moisture. Temperatures will be near normal throughout the
period.

Long term Saturday night through Wednesday
Low confidence this period. The pattern doesn't change much until a
cold front likely pushes into the area this weekend, probably
starting Saturday night, before stalling over or near the area into
the middle of next week. Rain chances should end up being above
normal but confidence is lower regarding temperatures as much
depends on the location of the front and rain cloud coverage.

Probably the biggest issue this period will be periods of heavy rain
which could cause some flooding, especially near the coast early
next week when astronomical tides will already be higher than
normal.

Aviation 22z Wednesday through Monday
May need to include vcts or a brief tsra at kchs through 01z
depending on radar trends at issuance time, otherwiseVFR will
prevail at both kchs and ksav.

Extended aviation outlook: there is a low probability of flight
restrictions Thursday and Friday afternoon evening due to
showers thunderstorms. Flight restrictions appear more likely this
weekend into early next week due to a cold front.

Marine
Tonight: the expansive bermuda-azores high is again the most
prominent feature across the local waters. This will maintain
s to SW winds as high as 12-17 kt a good portion of the night,
before they start to veer more toward the SW and W and diminish
around 3-5 kt late with land breeze influences occurring. Seas
will average 2 to 3 feet throughout.

Extended marine: no small craft advisories are expected. The coastal
waters will be sandwiched between high pressure in the atlantic and
a trough inland through late week. A cold front will then move into
the area this weekend, then become stationary overhead or nearby
through early next week. The strongest winds Thursday and Friday
appear to be along the land sea interface each afternoon (including
charleston harbor) due to the sea breeze.

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 mi45 min SSW 4.1 G 7 84°F 86°F1018.4 hPa (+0.3)
41029 - Capers Nearshore (CAP 2) 14 mi37 min SW 14 G 18 84°F 85°F1018.2 hPa
FBIS1 - Folly Island, SC 17 mi45 min SSW 12 G 14 84°F 1018.7 hPa (+0.0)76°F
ACXS1 - ACE Basin Reserve, SC 42 mi60 min Calm 84°F 1018 hPa75°F
NIWS1 - North Inlet-Winyah Bay Reserve, SC 45 mi60 min SW 5.1 84°F 1017 hPa77°F
41004 - EDISTO - 41 NM Southeast of Charleston, SC 49 mi25 min SSW 12 G 14 83°F 84°F1018.2 hPa76°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 mi50 minSSW 58.00 miFair82°F75°F79%1017.9 hPa
Charleston, Charleston Air Force Base, SC11 mi1.8 hrsSSW 710.00 miMostly Cloudy84°F72°F67%1017.9 hPa
Charleston Executive Airport, SC18 mi50 minS 410.00 miFair82°F75°F79%1018.3 hPa
Moncks Corner Berkeley County, SC21 mi70 minS 310.00 miFair77°F75°F94%1017.6 hPa

Link to 5 minute data for KLRO

Wind History from LRO (wind in knots)
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Last 24hrS6----------Calm--CalmCalmCalm--W6W7SW54SW6S10S7S10
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1 day agoCalm------S4--S4Calm--CalmCalmCalm--Calm6
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2 days agoS6S4--CalmS3Calm----CalmCalmCalmCalm3CalmSW4S8
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Tide / Current Tables for Cainhoy, Wando River, South Carolina
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Cainhoy
Click for Map
Wed -- 12:38 AM EDT     5.97 feet High Tide
Wed -- 06:46 AM EDT     Sunrise
Wed -- 06:47 AM EDT     0.71 feet Low Tide
Wed -- 12:04 PM EDT     Moonset
Wed -- 01:06 PM EDT     6.14 feet High Tide
Wed -- 07:08 PM EDT     1.19 feet Low Tide
Wed -- 07:57 PM EDT     Sunset
Wed -- 11:33 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.95.95.44.43.11.80.90.71.22.43.855.86.15.95.13.82.51.61.21.42.23.44.6

Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
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Charleston Harbor Entrance
Click for Map
Wed -- 12:24 AM EDT     -0.00 knots Slack
Wed -- 03:46 AM EDT     -1.89 knots Max Ebb
Wed -- 06:46 AM EDT     Sunrise
Wed -- 06:56 AM EDT     0.00 knots Slack
Wed -- 09:39 AM EDT     1.46 knots Max Flood
Wed -- 12:04 PM EDT     Moonset
Wed -- 01:01 PM EDT     -0.00 knots Slack
Wed -- 04:16 PM EDT     -1.78 knots Max Ebb
Wed -- 07:28 PM EDT     0.00 knots Slack
Wed -- 07:57 PM EDT     Sunset
Wed -- 10:01 PM EDT     1.26 knots Max Flood
Wed -- 11:33 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.2-0.4-1.2-1.8-1.9-1.5-0.800.81.31.410.60-0.8-1.4-1.8-1.7-1.1-0.30.411.31

Weather Map and Satellite Images
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wmap_A
GOES Local Image of    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Charleston, SC (20,4,5,8)
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Ground Weather Radar Station Charleston, SC
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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.