Sunday, July22, 2018 L-36.com


Marine Weather and Tides
Meggett, SC

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Sunrise 6:26AMSunset 8:26PM Sunday July 22, 2018 10:03 AM EDT (14:03 UTC) Moonrise 3:20PMMoonset 1:29AM Illumination 72% Phase: Waxing Gibbous; Moon at 10 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- 649 Am Edt Sun Jul 22 2018
Today..SW winds 5 to 10 kt, becoming S 10 to 15 kt late. A chance of showers and tstms this afternoon.
Tonight..S winds 5 to 10 kt. A chance of showers and tstms.
Mon..SE winds 5 to 10 kt. A chance of showers and tstms.
Mon night..S winds 10 kt. A chance of showers and tstms.
Tue..S winds 10 to 15 kt. Showers and tstms likely.
Tue night..S winds 10 to 15 kt. Showers and tstms likely.
Wed..S winds 10 to 15 kt. Showers and tstms likely.
Wed night..S winds 10 to 15 kt. A chance of showers and tstms.
Thu..SW winds 10 kt. A chance of showers and tstms.
Thu night..SW 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 84 degrees.
AMZ300 649 Am Edt Sun Jul 22 2018
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Low pressure will develop over the southeast united states and persist through Wednesday before dissipating. Atlantic high pressure is expected to build across the region by late week.

7 Day Forecast for Marine Location Near Meggett, SC
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location: 32.7, -80.28     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 221117
afdchs
area forecast discussion
national weather service charleston sc
717 am edt Sun jul 22 2018

Synopsis
Low pressure will develop over the southeast united states and
persist through Wednesday before dissipating. Atlantic high
pressure is expected to build across the region by late week.

Near term through tonight
As of 715 am: satellite images indicate that today will begin
with mostly sunny conditions at most locations. However, early
daytime heating should support stratocu developing between 8-9
am, lifting through this afternoon. I will update the forecast
to lowers morning pops and sky.

As of 4 am: around an hour ago, a new thunderstorm along an old
outflow developed a three-body scatter spike with 71 dbz at 22.5
kft. This was very impressive given the time of night. Perhaps the
environment has recovered from the widespread activity on Friday and
early Saturday outflow.

Isolated to scattered showers and thunderstorms should continue to
develop along a outflow boundary over the sc coastal counties and
adjacent waters. This afternoon, a large h5 low is forecast to slide
south over the southern appalachians. Gfs1deg indicates that a field
of weak h5 q-vector convergence will pass over the forecast area.

Near term guidance indicates that CAPE will range from around 2000
j kg over the land based zones to 3500 j kg over the near shore
waters. In addition, dcape values are forecast to range between 1000-
1500 j kg. The combination of the synoptic scale forcing and thermal
profiles should yield scattered late afternoon and evening
thunderstorms. It appears that a few damaging wind and hail events
are possible, with generally pulse to multicellular storms. High
temperatures are forecast to range from the low 90s across the chs
tri-county to the low to mid 90s across SE ga.

Convection should gradually dissipate during the overnight hours.

However, isolated storms could survive into the pre-dawn hours
Monday. Low temperatures will generally range in the low to mid 70s
across the region.

Short term Monday through Wednesday
The closed upper low over the deep south on Monday will
transition to an open trough Tuesday and Wednesday. Meanwhile
weak surface low pressure will persist over southern ga al.

There will be ample forcing for ascent throughout the period.

However, we think convective coverage will be a bit lower on
Monday than Tuesday Wednesday due to some drier air in place and
weaker instability. We maintained likely pops for portions of
the area Tuesday and Wednesday given pwats surging back above
2" and capes exceeding 2,000 j kg.

Long term Wednesday night through Saturday
Weak shortwave energy will persist on Thursday before the deep
layered ridge builds from the western atlantic over the
southeast united states. We're showing higher pops on Thursday,
then more typical summertime coverage Friday through Sunday.

Aviation 11z Sunday through Thursday
Broad mid level low will settle over the southern appalachians
today. A least scattered CU should develop across the region
this afternoon, bases around 5 kft. Deep mixing should result in
a period of gusty SW winds at kchs this afternoon. A few
thunderstorms could pass near or over the terminals late this
afternoon and evening. I will highlight with a prob30 between
21z to 1z. Following the trend the past couple of morning, i
will indicate the potential for fog and stratus developing
early Monday morning.

Extended aviation outlook: scattered to numerous showers and
tstms are expected Monday through Wednesday, then more isolated
activity on Thursday. Expect periodic flight restrictions
during this period.

Marine
Southwest winds between 10-15 kts will remain across the marine
zones for today and tonight. Wave heights are forecast to range
between 2-3 ft, reaching around 4 ft beyond 30 nm late this
afternoon. Scattered thunderstorms today and this evening will
potentially produce localized gusts in excess of 34 kts.

Monday through Friday: the waters will be sandwiched between
inland low pressure and offshore high pressure. A prolonged
period of southerly winds approaching 15 kt at times may bring
some 6 ft seas to outer portions of the sc ga waters, especially
Tuesday into Wednesday. Small craft advisories may eventually be
necessary.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... None.

Near term... Ned
short term... Jrl
long term... Jrl
aviation... Jrl ned
marine... Jrl ned


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ACXS1 - ACE Basin Reserve, SC 13 mi79 min SW 1 79°F 1009 hPa75°F
CHTS1 20 mi34 min WSW 7 G 9.9 82°F 84°F1009.1 hPa
FBIS1 - Folly Island, SC 21 mi64 min WSW 8.9 G 11 80°F 1009.5 hPa (+1.0)74°F
41033 30 mi56 min W 14 G 19 80°F 84°F1009 hPa
41029 - Capers Nearshore (CAP 2) 35 mi56 min W 9.7 G 14 80°F 83°F1008.2 hPa
FPKG1 - 8670870 - Fort Pulaski, GA 57 mi40 min WSW 6 G 8.9 80°F 83°F1009.9 hPa

Wind History for Charleston, SC
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charleston, Charleston Air Force Base, SC20 mi68 minW 1010.00 miPartly Cloudy80°F73°F82%1008.9 hPa
Walterboro Lowcountry Regional Airport, SC24 mi69 minSW 510.00 miMostly Cloudy77°F73°F89%1009.1 hPa

Wind History from JZI (wind in knots)
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Last 24hrE9
G15
E11E10E10E6E6E5E4CalmCalmCalmCalmCalmCalmCalmCalmNE3E4E7E6E7E6SE6
G12
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1 day agoNE6NE7NE7NE6E5E7E5E5E5E5CalmN3N4CalmCalmNE6NE7NE10NE8E11NE13E13E13
G18
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2 days agoS8S10S8N9NE4S5SW5CalmS4S5S3S4CalmCalmCalmNW6N7N6N5N5N5CalmNE8NE8

Tide / Current Tables for Lower Toogoodoo Creek, 2 mi. above entrance, South Carolina
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Lower Toogoodoo Creek
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Sun -- 02:29 AM EDT     Moonset
Sun -- 05:57 AM EDT     6.16 feet High Tide
Sun -- 06:28 AM EDT     Sunrise
Sun -- 11:29 AM EDT     0.39 feet Low Tide
Sun -- 04:20 PM EDT     Moonrise
Sun -- 06:44 PM EDT     7.32 feet High Tide
Sun -- 08:26 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.21.934.15.15.96.25.74.531.50.50.51.22.43.85.26.37.17.36.65.23.41.8

Tide / Current Tables for Charleston Harbor Entrance, South Carolina Current
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Charleston Harbor Entrance
Click for Map
Sun -- 12:56 AM EDT     1.15 knots Max Flood
Sun -- 02:27 AM EDT     Moonset
Sun -- 04:38 AM EDT     -0.00 knots Slack
Sun -- 06:26 AM EDT     Sunrise
Sun -- 08:13 AM EDT     -1.82 knots Max Ebb
Sun -- 11:18 AM EDT     0.00 knots Slack
Sun -- 01:36 PM EDT     1.35 knots Max Flood
Sun -- 04:18 PM EDT     Moonrise
Sun -- 05:42 PM EDT     -0.00 knots Slack
Sun -- 08:24 PM EDT     Sunset
Sun -- 08:53 PM EDT     -2.23 knots Max Ebb
Sun -- 11:57 PM EDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.91.210.80.4-0.2-0.9-1.5-1.8-1.7-1.1-0.30.71.31.31.31.10.6-0.3-1.2-2-2.2-1.8-1

Weather Map and Satellite Images
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wmap_A
GOES Local Image of Southeast    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.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Charleston, SC (10,2,3,4)
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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.