Saturday, May27, 2017 L-36.com


Marine Weather and Tides
Hollywood, SC

Version 3.4
What's New / NOTES
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 6:12AMSunset 8:21PM Saturday May 27, 2017 6:00 AM EDT (10:00 UTC) Moonrise 7:10AMMoonset 9:28PM Illumination 4% 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- 321 Am Edt Sat May 27 2017
Today..SW winds 5 to 10 kt...increasing to 15 to 20 kt this afternoon.
Tonight..SW winds 15 to 20 kt...diminishing to 5 to 10 kt after midnight.
Sun..W winds 5 to 10 kt...becoming sw 15 kt in the afternoon.
Sun night..SW winds 15 kt...diminishing to 5 kt after midnight.
Mon..W winds 5 to 10 kt...becoming sw 15 kt in the afternoon. A slight chance of showers and Thunderstorms in the afternoon.
Mon night..SW winds 10 kt...diminishing to 5 kt after midnight. A slight chance of showers and Thunderstorms in the evening.
Tue..W winds 5 to 10 kt. A slight chance of showers and Thunderstorms.
Tue night..SW winds 5 to 10 kt. A slight chance of showers and Thunderstorms.
Wed..SW winds 5 to 10 kt. A slight chance of showers and Thunderstorms.
Wed night..S winds 5 to 10 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...77 degrees.
AMZ300 321 Am Edt Sat May 27 2017
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will linger over the region through this weekend. A weak cold front is expected to stall across the area early next week.

7 Day Forecast for Marine Location Near Hollywood, SC
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location: 32.73, -80.07     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 270750
afdchs
area forecast discussion
national weather service charleston sc
350 am edt Sat may 27 2017

Synopsis
High pressure will linger over the region through this weekend.

A weak cold front is expected to stall across the area early
next week.

Near term through tonight
Today: the mid upper level flow pattern will feature nearly
zonal flow with a slight anticyclonic curvature. A large area of
nva will encompass the area and model soundings show plentiful
dry air coincident with a very strong capping inversion. At the
surface, high pressure will be the primary feature as it sits to
the south of the forecast area. Winds for much of the day will
be west-southwest, and this westerly flow combined with rising
heights aloft will result in a warm afternoon. Forecast highs
are in the low 90s everywhere except the beaches which should
see a late afternoon sea breeze. In fact, the charleston county
beaches will likely see breezy conditions and winds routinely
gusting to around 25 mph.

Tonight: the upper ridge will temporarily flatten in response
to some mid level energy that crosses the southern appalachians
in the evening. The bulk of any forcing associated with this
shortwave will remain north of the area, but various models do
depict some nocturnal convection along the north carolina south
carolina state line. Current thinking is that this will still
stay north of the santee river, so a dry forecast is in place,
but it is still something to keep an eye on. Overall still a
quiet night with mild lows around 70.

Short term Sunday through Tuesday
The upper ridge will hold strong for one more day, keeping a
mainly dry forecast for Sunday. The exception may be an isolated
shower or TSTM drifting into far northern zones late in the
afternoon as a weak shortwave brushes the area. Highs will top
out in the mid 90s. Given dewpoints around 70, heat indices may
top 100 for a few hours.

The upper ridge will amplify on Monday though the axis will
gradually shift farther into the western atlantic. Model
soundings show a moderate mid-level cap through early afternoon
after which it breaks. The best shortwave energy will remain
west of the area during the day, though a weak cold front will
push into central ga sc late. A toasty day with highs in the mid
90s and dewpoints in the lower 70s will yield fairly impressive
cape values during the afternoon. There will also be a fair
amount of dry air aloft. If the mid-level cap does indeed break
at some point on Monday, convection should initiate pretty
quickly. There is also the possibility that some upstream
activity will drift into the area. Convective indices would
support some severe thunderstorms, mainly across inland areas
late in the afternoon. Given the uncertainty regarding the
breakdown of the ridge we show pops no higher than 30%.

The cold front will stall near or over the area on Tuesday and
upper shortwave energy will traverse our inland zones. Better
coverage of mainly afternoon evening showers and thunderstorms
is expected. Greater cloud cover will cut down on surface-based
destabilization though there will still be enough heating to
push capes above 1,000 j kg. Dry air aloft could create a
damaging wind potential with some of the storms.

Long term Tuesday night through Friday
A weak front will meander over the area mid to late week while
weak upper troughing will keep a steady stream of shortwaves
moving through. Decent coverage of showers and tstms expected
each day, mainly during the afternoon.

Aviation 08z Saturday through Wednesday
Vfr.

Extended aviation outlook: mainlyVFR conditions. Brief flight
restrictions possible in afternoon evening showers tstms
starting Monday.

Marine
Today and tonight: high pressure centered south of the local
waters will drive persistent southwesterly flow through the
period. A locally enhanced pressure gradient as well as the
influence of a late day sea breeze will result in elevated winds
mainly along the charleston county coast including the
charleston harbor. Have capped the forecast at 15-20 knots for
now, but some gusts up to 25 knots will be possible. No small
craft advisory for now, but it could end up being marginally
supportive of one at times. Then overnight, southwest flow will
continue around 15 knots. Seas will primarily be in the 1-3 ft
range through the period, with 4 feet possible out near 20 nm
late today and this evening.

Atlantic high pressure will generally prevail though a weaker
gradient will ensue mid-week as a front stalls over the waters.

Southwest flow will prevail with modest afternoon sea breezes
along the coast.

Tides coastal flooding
Tides will be running high through Sunday due to the new moon
and perigee. Fortunately the wind directions are not very
conducive for surge, but we could see very marginal coastal
flooding along the sc coast during the evening high tides today
and Sunday.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... None.

Near term... Bsh
short term... Jrl
long term... Jrl
aviation... Bsh jrl
marine... Bsh jrl
tides coastal flooding...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHTS1 9 mi42 min W 4.1 G 8 72°F 77°F1016 hPa
FBIS1 - Folly Island, SC 10 mi60 min WSW 2.9 G 4.1 70°F 1016.4 hPa (-0.3)64°F
ACXS1 - ACE Basin Reserve, SC 24 mi75 min Calm 65°F 1016 hPa64°F
41029 - Capers Nearshore (CAP 2) 24 mi52 min W 9.7 G 14 79°F 76°F1015.6 hPa
41033 36 mi52 min WSW 7.8 G 9.7 76°F 77°F1015.9 hPa
41004 - EDISTO - 41 NM Southeast of Charleston, SC 54 mi40 min WSW 12 G 14 74°F 74°F1015.6 hPa70°F

Wind History for Charleston, SC
(wind in knots)    EDIT      (on/off)   Help
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W5
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G21
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G15

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston Executive Airport, SC4 mi65 minW 310.00 miFair66°F64°F94%1016.3 hPa
Charleston, Charleston Air Force Base, SC13 mi64 minSW 410.00 miPartly Cloudy65°F57°F78%1015.6 hPa
Mount Pleasant Regional-Faison Field, SC19 mi65 minN 010.00 miFair64°F62°F94%1015.9 hPa

Wind History from JZI (wind in knots)
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Last 24hrW3W6W6W6W10W10W9
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S12S10SW11SW3SW3CalmCalmSW3SW5SW4CalmSW4W3Calm
1 day agoW7W8
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SW5CalmSW4SW4SW3SW3SW5SW5SW4Calm
2 days agoW5SW6SW7
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Tide / Current Tables for Church Creek bridge, Wadmalaw River, South Carolina
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Church Creek bridge
Click for Map
Sat -- 04:58 AM EDT     -0.62 feet Low Tide
Sat -- 06:14 AM EDT     Sunrise
Sat -- 08:10 AM EDT     Moonrise
Sat -- 12:06 PM EDT     7.18 feet High Tide
Sat -- 05:05 PM EDT     -0.80 feet Low Tide
Sat -- 08:20 PM EDT     Sunset
Sat -- 10:28 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
97.65.22.40.2-0.6-0.11.22.84.55.86.87.26.64.82.40.2-0.8-0.412.94.96.78.1

Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
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Charleston Harbor Entrance
Click for Map
Sat -- 01:23 AM EDT     -3.46 knots Max Ebb
Sat -- 04:32 AM EDT     0.00 knots Slack
Sat -- 06:13 AM EDT     Sunrise
Sat -- 06:49 AM EDT     1.96 knots Max Flood
Sat -- 08:09 AM EDT     Moonrise
Sat -- 10:31 AM EDT     -0.00 knots Slack
Sat -- 01:40 PM EDT     -2.96 knots Max Ebb
Sat -- 04:34 PM EDT     0.01 knots Slack
Sat -- 07:11 PM EDT     2.33 knots Max Flood
Sat -- 08:19 PM EDT     Sunset
Sat -- 10:27 PM EDT     Moonset
Sat -- 11:05 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-2.5-3.4-3.3-2.2-0.80.61.721.71.30.6-0.6-1.9-2.8-2.9-2.1-0.80.61.82.32.21.81.20.1

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 (6,6,7,8)
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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.