Saturday, August24, 2019 L-36.com


Marine Weather and Tides
Laurel Bay, SC

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7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
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Sunrise 6:51AMSunset 7:58PM Saturday August 24, 2019 8:48 PM EDT (00:48 UTC) Moonrise 12:00AMMoonset 2:03PM Illumination 30% Phase: Waning Crescent; Moon at 24 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- 349 Pm Edt Sat Aug 24 2019
Tonight..E winds 5 to 10 kt, becoming ne 10 to 15 kt with gusts to 20 kt late. Seas 2 to 3 ft. A chance of showers and tstms this evening, then showers likely with a slight chance of tstms after midnight.
Sun..NE winds 15 to 20 kt. Seas 3 to 4 ft. A chance of showers. A slight chance of tstms in the morning, then a chance of tstms in the afternoon.
Sun night..NE winds 15 kt with gusts to 20 kt. Seas 3 to 4 ft. A chance of showers with a slight chance of tstms.
Mon..NE winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers with a slight chance of tstms.
Mon night..NE winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance of tstms in the evening. A chance of showers.
Tue..N winds 5 to 10 kt, becoming sw in the afternoon. Seas 2 ft. A chance of showers and tstms.
Tue night..SW winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms.
Wed..SW winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms.
Wed night..SW winds 5 kt. Seas 1 foot. A chance of showers and tstms.
Thu..NE winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms.
Thu night..E winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 349 Pm Edt Sat Aug 24 2019
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A cold front will cross through the region tonight, then stall just offshore and south of the region on Sunday. Low pressure is expected to pass well offshore early next week, before another cold front impacts the area later in the week.


7 Day Forecast for Marine Location Near Laurel Bay, SC
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location: 32.49, -80.82     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 242339
afdchs
area forecast discussion
national weather service charleston sc
739 pm edt Sat aug 24 2019

Synopsis
A cold front will cross through the region tonight, then stall
just offshore and south of the region on Sunday. Low pressure
is expected to pass well offshore early next week, before
another cold front impacts the area later in the week.

Near term until 6 am Sunday morning
As of 735 pm: clx detected a fine line from georgetown
co. West across berkeley and dorchester counties, west to the
savannah river site. This line was sliding south between
10-15 kts. Based on surface observations, I suspect that this
fine line is associated with the cold front, or the leading edge
of cold air damming. I will update the forecast to increase pops
along and south of the front, especially the chs tri-county
area.

Previous discussion:
the cold front will continue moving southwards through our area
this evening, probably becoming located south of our area by
late tonight. Then, distant high pressure will build from the
north. The main convective threat should be with and ahead of
the front this evening, mainly across our ga counties.

Instability isn't overly impressive, so the severe risk is low.

However, pwats ~2.25" or 2 standard deviations above normal
will lead to potentially very heavy rainfall. Combined with
light steering winds aloft, local flooding in low-lying and
poorly drained areas is possible. The heaviest precipitation
will trend southwards with the front this evening. Models
generally show another area developing along the sc coast while
inland areas trend drier. We indicated this in the grids, but
wouldn't be surprised if more changes need to be made based on
radar trends. Low clouds and maybe even some patchy fog cannot
be ruled out late tonight. Lows should be in the 70s.

Short term 6 am Sunday morning through Tuesday
Sunday and Monday: a cold front will slowly progress to the coast
and likely stall just offshore and or south of the area to start off
the week. As this occurs, a cooler wedge-type pattern will follow,
initially setting up across the midlands Sunday, then eventually
nudging closer to parts of southeast south carolina and inland
southeast georgia on Monday as the quasi-stationary front drifts
further south. The position of the front will dictate most precip
coverage across the area through Monday and also keep any tropical
low development track well offshore over the atlantic. Precip
chances should be highest near the southeast georgia coast on
Sunday, where pwats remain between 2.00-2.25 inches near the
southward moving front. Precip chances could persist into Monday,
mainly across southern most locations near the altamaha river where
moisture lingers behind the front. Overall instability will remain
quite low under cloudy skies both days with little to no threat of
severe weather anticipated. Brief heavy rainfall will be the main
concern given deep moisture levels and weak wind fields in place.

High temps will be a few degrees below normal each day, peaking in
the mid 80s across much of southeast south carolina and mid upper
80s across southeast georgia, warmest near the altamaha river.

Overnight lows should range in the upper 60s lower 70s well inland
to mid upper 70s near the coast.

Tuesday: a quasi-stationary front should remain just south of the
region, but a wedge-like pattern should weaken across the southeast
united states in advance of a mid upper lvl trough of low pressure
and associated sfc cold front approaching from the west. Some
guidance suggests what is left of a large cluster of thunderstorms
currently ongoing across the western gulf of mexico to phase with
the longwave trough before shifting toward the area into midweek
(bringing higher precip chances to the area). Regardless, a
developing southwest sfc flow should advect deeper moisture to the
region while mid upper lvl forcing and the sfc front arrive late,
likely after sunset. Given the anticipated pattern, scattered to
numerous showers and or thunderstorms are possible later in the day,
highest chances west of i-95. Temps should warm a few degrees more
than the previous day with highs generally ranging in the mid upper
80s (coolest along the coast) to around 90 degrees across inland
locations of southeast georgia.

Long term Tuesday night through Saturday
A tropical low off the mid-atlantic coast Tuesday night will
continue to lift northeast away from the region on Wednesday.

Another cold front is forecast to cross the area later Wednesday or
Thursday. The front will likely stall off the coast through late
week while high pressure builds inland. Given the front lingering in
the vicinity, rain chances will remain in the forecast. Highest pops
will be near the coast. Temperatures are expected to be near normal.

Aviation 00z Sunday through Thursday
Prior to the 0z tafs, kclx detected a fine line from georgetown
co. West across berkeley and dorchester counties, west to the
savannah river site. This line was sliding south between
10-15 kts. Based on surface observations, I suspect that this
fine line is associated with the cold front, or the leading edge
of cold air damming. Hrrr and radar trends indicate that showers
and thunderstorms that have develop upstream kchs along the
front will track over the terminal between 0z-3z, I will
highlight with a tempo. Ksav may see a thunderstorms pass within
the vicinity between 0z and 3z. Later tonight, in the wake of
the front, forecast soundings indicate saturated conditions
developing under a llvl inversion. Given the forecast soundings
and mos, I will indicate MVFR condition at kchs with ifr
ceilings at ksav. Kchs will be positioned between the wedge sfc
high to the west and a possible developing low near the gulf
stream, creating a decent pressure gradient. I will indicate
gusty NE winds at kchs by 15z.

Extended aviation outlook: flight restrictions are possible at both
chs and sav terminals Sunday and Monday, mainly due to lower cloud
ceilings and showers associated with a building wedge-type pattern
across the area early next week. Brief flight restrictions will also
be possible with showers thunderstorms ahead of an approaching cold
front Tuesday into the middle of next week.

Marine
Tonight: a cold front will move through the waters this
evening, becoming located to our south after midnight.

Meanwhile, high pressure will be far to our north. The
interaction between these two features will cause the surface
pressure gradient to become elevated, leading to increasing
winds. Expect NE winds to increase to 15-20 kt across our sc
waters, including charleston harbor, after midnight. Gusts could
approach 25 kt just before daybreak, which is just short of
small craft advisory criteria. Our ga waters should have winds
of 10-15 kt. Seas will build to 2-4 ft in response to these
winds.

Sunday through Thursday: high pressure will build across inland
areas behind a cold front shifting south of the area early next week
while tropical low pressure tracks well east of the area offshore.

The pattern will likely result in a tightening pressure gradient
over coastal waters Sunday and Monday, favoring north northeast
winds 15-20 kts and seas building up to 4-5 ft. Conditions could
approach small craft advisory levels for a period on Sunday or
Monday before the tropical low departs north northeast of the region
Tuesday. Conditions will then remain well below small craft advisory
levels through midweek.

Rip currents: increasing east northeast winds could contribute to an
enhanced risk of rip currents on area beaches late this weekend into
early next week, especially if tropical low pressure intensifies
while tracking well offshore.

Tides coastal flooding
Astronomical tides will be running close to minor coastal flood
advisory levels next week and onshore winds could lead to even
higher tides, mainly during the evening high tide cycles starting
Monday. In addition, there is the potential for some heavy rain
around the times of high tide which could exacerbate any flooding
issues.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... None.

Near term... Ned
short term...

long term... Etm
aviation... Ned
marine...

tides coastal flooding...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ACXS1 - ACE Basin Reserve, SC 20 mi63 min ENE 1 83°F 1015 hPa77°F
41033 26 mi40 min ESE 9.7 G 14 84°F 86°F1015.1 hPa
FPKG1 - 8670870 - Fort Pulaski, GA 32 mi54 min E 12 G 14 83°F 85°F1015.3 hPa
FBIS1 - Folly Island, SC 51 mi48 min E 8 G 9.9 82°F 1016 hPa (-0.0)76°F

Wind History for Fort Pulaski, GA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Beaufort County Airport, SC11 mi73 minE 47.00 miFair82°F75°F79%1014.9 hPa
Hilton Head Island, Hilton Head Airport, SC20 mi2 hrsE 610.00 miA Few Clouds82°F77°F84%1015.2 hPa

Link to 5 minute data for KNBC

Wind History from NBC (wind in knots)
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Last 24hrSW53S5S5SE8S6SE10
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S6--S3S4S4------SW4--SW3W3SW3SW4W9SW9
1 day ago5SW6S6S7SE6SE7S8S10S4S4S4S3----------Calm--CalmCalm------
2 days agoCalmSE5S7S7SE8S8S7
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5S7S4S3CalmS4--S4SW4--SW3S3CalmCalmCalmSW43

Tide / Current Tables for Corning Landing, Whale Branch, South Carolina
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Corning Landing
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Sat -- 12:51 AM EDT     Moonrise
Sat -- 04:17 AM EDT     7.17 feet High Tide
Sat -- 06:52 AM EDT     Sunrise
Sat -- 10:22 AM EDT     0.62 feet Low Tide
Sat -- 03:02 PM EDT     Moonset
Sat -- 04:49 PM EDT     8.36 feet High Tide
Sat -- 07:57 PM EDT     Sunset
Sat -- 11:08 PM EDT     1.11 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.74.15.56.67.1764.52.91.50.70.81.83.55.478.18.37.76.34.52.91.71.1

Tide / Current Tables for Hwy. 170 bridge, Broad River, South Carolina
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Hwy. 170 bridge
Click for Map
Sat -- 12:52 AM EDT     Moonrise
Sat -- 03:31 AM EDT     6.61 feet High Tide
Sat -- 06:52 AM EDT     Sunrise
Sat -- 09:43 AM EDT     0.77 feet Low Tide
Sat -- 03:02 PM EDT     Moonset
Sat -- 04:03 PM EDT     7.71 feet High Tide
Sat -- 07:57 PM EDT     Sunset
Sat -- 10:29 PM EDT     1.37 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.64.95.96.56.55.84.63.21.910.81.52.94.66.27.37.77.36.34.83.42.21.51.5

Weather Map and Satellite Images
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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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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.