Sunday, August18, 2019 L-36.com


Marine Weather and Tides
Yemassee, 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 6:47AMSunset 8:05PM Sunday August 18, 2019 5:02 PM EDT (21:02 UTC) Moonrise 9:08PMMoonset 8:24AM Illumination 89% Phase: Waning Gibbous; Moon at 18 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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AMZ352 Waters From Edisto Beach Sc To Savannah Ga Out 20 Nm- 326 Pm Edt Sun Aug 18 2019
Tonight..SW winds 10 to 15 kt. Seas 2 to 3 ft.
Mon..SW winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance of showers and tstms in the morning, then a chance of showers and tstms in the afternoon.
Mon night..S winds 10 kt. Seas 2 ft. A slight chance of showers and tstms.
Tue..S winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms, mainly in the morning.
Tue night..S winds 10 kt. Seas 2 to 3 ft. A chance of showers and tstms.
Wed..S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms.
Wed night..S winds 10 kt. Seas 3 ft. A chance of showers and tstms.
Thu..SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms.
Thu night..S winds 10 kt. Seas 2 to 3 ft. A chance of showers and tstms.
Fri..SW winds 10 kt. Seas 2 to 3 ft. A chance of showers and tstms.
Fri night..S winds 10 kt. Seas 2 ft. A chance of showers and tstms. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 326 Pm Edt Sun Aug 18 2019
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Weak low pressure over the florida panhandle will drift into southeast georgia late tonight. Atlantic high pressure and an inland trough will then prevail into late week before a cold front approaches but likely stalls before reaching the area.


7 Day Forecast for Marine Location Near Yemassee, SC
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location: 32.68, -80.74     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 181943 cca
afdchs
area forecast discussion... Corrected
national weather service charleston sc
343 pm edt Sun aug 18 2019

Synopsis
Weak low pressure over the florida panhandle will drift into
southeast georgia late tonight. Atlantic high pressure and an
inland trough will then prevail into late week before a cold front
approaches but likely stalls before reaching the area.

Near term through tonight
Through early evening: shower activity has lingered along the
charleston county coast longer than expected. Activity should
dissipate over the next few hours. Farther to the south,
instability is building where significant breaks are supporting
modest amounts of insolation. Expect the best chances of
showers tstms to occur along south of the i-16 corridor,
possibly as far north as beaufort, through sunset. Severe
weather is unlikely.

Overnight: weak low pressure centered over the central florida
panhandle at mid-afternoon will drift slowly north into south-
central georgia tonight. A broad, southerly flow will persist
as the region will remain pinned between the low and atlantic
high pressure centered well offshore. Expect a region of stratus
to develop across northern florida within an area of lowering
1000 hpa condensation pressure deficits after midnight which
will slowly advect into interior southeast georgia by daybreak
Monday. Some patchy, light fog could also accompany the stratus,
but not major reductions in visibilities are anticipated at this
time. The night should remain mostly rain-free, but isolated
showers tstms could drift in from the south late across the far
southern zones within weak region of cyclonic convergence along
the east side of the low's circulation. Mentionable pops will be
capped a slight chance roughly along south of a metter-hinesville-
halfmoon landing line to account for this. Lows will range from
the lower- mid 70s inland to the upper 70s near 80 at the beaches.

Short term Monday through Wednesday
The large scale pattern will consist of atlantic high pressure
offshore, with troughing inland. A weak area of low pressure will
meander over southern georgia Monday into Tuesday before possibly
lifting into sc then dissipating. The most active day of the set
looks to be on Monday especially in southeast georgia, given forcing
aid from shortwave energy and pwats of over 2 inches. More typical
summertime rain chances are expected thereafter. It is worth noting
that there is some discrepancy between model solutions regarding
convective coverage Tuesday and Wednesday. GFS seems to be the
outlier indicating a wetter forecast, so have opted to go with
consensus. Overall severe threat looks to be low with marginal
instability, however cannot rule out a stronger to marginally severe
storm during this time of year, especially where boundary
interactions occur.

Temperatures will be fairly seasonable, with highs in the upper
80s low 90s. Lows overnight will range from the low 70s inland to
mid upper 70s at the immediate coast.

Long term Wednesday night through Saturday
The pattern doesn't change much until late week when a cold
front moves south toward the area this weekend. Deeper moisture
and the nearby front should promote better rain chances.

Otherwise, no significant impacts expected overall with the
severe weather risk remaining low. Temperatures should remain
near above normal.

Aviation 18z Sunday through Friday
Vfr for much of the period. Tstms are expected to develop over
the next few hours, but should mostly remain southwest of kchs.

Activity will likely be close enough to ksav by mid-afternoon to
maintain at least at tempo group in the 21-00z window. There are
signals that a brief period of MVFR CIGS could reach ksav just
before sunrise. This is mainly in the statistical guidance.

Probabilistic data suggest the better chances will remain west
of the terminal closer to weak low pressure that will move into
south-central georgia overnight. May opt to include a tempo
group just before daybreak to cover this situation.

Extended aviation outlook: flight restrictions are possible mainly
from afternoon evening showers and thunderstorms through late week.

Marine
Tonight: there are no concerns with south to southwest winds
prevailing. Speeds will average 10-15 kt, but gusts could
occasionally reach as high as 20 kt at times, mainly through
midnight. Seas will average 1-3 ft.

Monday through Friday: the marine zones will remain on the backside
of atlantic high pressure, keeping winds out of the south southwest
through the period. Wind speeds will remain below small craft
advisory criteria, generally 15 knots or less. Seas will average 2
to 3 feet.

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
ACXS1 - ACE Basin Reserve, SC 17 mi77 min Calm 85°F 1018 hPa77°F
41033 33 mi54 min S 9.7 G 12 83°F 85°F1017.8 hPa
CHTS1 44 mi50 min SW 9.9 G 12 85°F 86°F1017.6 hPa
FBIS1 - Folly Island, SC 45 mi62 min SW 9.9 G 12 83°F 1018.1 hPa (-1.1)77°F
FPKG1 - 8670870 - Fort Pulaski, GA 45 mi50 min SSE 8.9 G 13 85°F 85°F1017.9 hPa

Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Walterboro Lowcountry Regional Airport, SC17 mi67 minSSE 710.00 miPartly Cloudy86°F73°F66%1017.9 hPa
Beaufort County Airport, SC19 mi67 minN 07.00 miPartly Cloudy88°F75°F66%1017.6 hPa

Link to 5 minute data for KNBC

Wind History from NBC (wind in knots)
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Last 24hrCalm34SE33S5NE12
G23
S5S4SE5S4S4S4SW3S3CalmSW3CalmCalmCalmCalmSW3SW3N5
1 day agoN433W73--W5NW5W4NW4CalmCalmCalmCalmCalmCalmCalmNE3CalmCalmCalmNW3N5N4
2 days agoW11W12
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NW12NW9NW10NW7NW3W4W4W4NW4NW4NW3--CalmCalmCalmCalmCalmCalmN4

Tide / Current Tables for Bluff Plantation, Combahee River, South Carolina
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Bluff Plantation
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Sun -- 02:21 AM EDT     3.29 feet High Tide
Sun -- 06:48 AM EDT     Sunrise
Sun -- 08:31 AM EDT     0.19 feet Low Tide
Sun -- 09:25 AM EDT     Moonset
Sun -- 02:36 PM EDT     3.06 feet High Tide
Sun -- 08:04 PM EDT     Sunset
Sun -- 08:37 PM EDT     0.34 feet Low Tide
Sun -- 10:07 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.533.33.22.82.21.50.70.30.20.71.42.12.7332.72.21.50.90.40.40.71.4

Tide / Current Tables for Sheldon, Huspa Creek, Whale Branch, South Carolina
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Sheldon
Click for Map
Sun -- 12:27 AM EDT     8.63 feet High Tide
Sun -- 06:32 AM EDT     0.41 feet Low Tide
Sun -- 06:48 AM EDT     Sunrise
Sun -- 09:25 AM EDT     Moonset
Sun -- 12:42 PM EDT     8.03 feet High Tide
Sun -- 06:38 PM EDT     0.72 feet Low Tide
Sun -- 08:04 PM EDT     Sunset
Sun -- 10:07 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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8.58.57.55.93.91.90.60.51.63.45.36.97.887.25.842.210.81.73.45.36.9

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 (17,4,5,8)
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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.