Sunday, June25, 2017 L-36.com


Marine Weather and Tides
Yemassee, SC

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
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 6:16AMSunset 8:34PM Sunday June 25, 2017 11:40 PM EDT (03:40 UTC) Moonrise 6:59AMMoonset 9:09PM 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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AMZ352 Waters From Edisto Beach Sc To Savannah Ga Out 20 Nm- 938 Pm Edt Sun Jun 25 2017
Tonight..SW winds 5 to 10 kt. Seas 2 to 3 ft. Showers and tstms, mainly this evening.
Mon..NW winds 5 to 10 kt, becoming ne in the afternoon. Seas 2 ft. A chance of showers and tstms.
Mon night..E winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms, mainly in the evening.
Tue..N winds 5 kt, becoming E in the afternoon. Seas 2 ft. A slight chance of showers and tstms in the morning, then a chance of showers and tstms in the afternoon.
Tue night..SE winds 5 to 10 kt, becoming ne after midnight. Seas 2 ft. A chance of showers and tstms, mainly in the evening.
Wed..NE winds 10 to 15 kt. Seas 2 ft, building to 3 ft in the afternoon. A slight chance of showers and tstms in the morning.
Wed night..E winds 10 to 15 kt. Seas 2 to 3 ft.
Thu..E winds 10 kt. Seas 2 to 3 ft. A slight chance of showers and tstms.
Thu night..SE winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance of showers and tstms.
Fri..SE winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms.
Fri night..S 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 938 Pm Edt Sun Jun 25 2017
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A cold front will gradually move into the area tonight, then linger over or nearby through Tuesday. High pressure will build in from the northwest by mid week bringing drier conditions before moving into the atlantic for the second half of the week.

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 260222 cca
afdchs
area forecast discussion... Corrected
national weather service charleston sc
1022 pm edt Sun jun 25 2017

Synopsis
A cold front will gradually move through the area tonight, then linger
just offshore through Tuesday. High pressure will build in from the
northwest by mid week bringing drier conditions before moving into
the atlantic for the second half of the week.

Near term until 6 am Monday morning
Areas of light rains persist this evening across southeast ga along
the immediate sc coast. Isolated deep convection is noted upstream
along the midlands and 18z NAM bl capes have done a nice job in
delineating an axis of instability. The model shows a gradual weakening
of this elevated instability as it drifts southeast just ahead of
the cold front overnight. We lowered pops to chance ranges coast
and south and just a slight chance inland on this update. We expect
on isolated tstms at best for the remainder of the night. Low stratus
was developing across inland and southern zones and while a build
down scenario is unlikely, some patchy fog is possible. A weak
low developing offshore late may result in change to this thinking,
but we are still holding off on fog additions to the zones. No
changes to temps overnight as readings many areas remain steady
around the mid 70s under fairly widespread cloudiness.

Short term 6 am Monday morning through Wednesday
A cold front is expected to move southeast through the area early
Monday before stalling just offshore through Tuesday, then pushing
farther southeast Wednesday as high pressure builds from the
northwest. Rain chances will remain elevated Monday for most areas
except toward the pee dee midlands as the deeper moisture forcing
begins to shift offshore. Low rain chances for generally light
precipitation will continue however into Wednesday, although by
Wednesday chances will mostly be confined to the ga coast where
coastal convergence will be enhanced. Otherwise temperatures will
warm to near normal into Tuesday before the drier and cooler air
mass arrives for Wednesday.

Long term Wednesday night through Sunday
The center of high pressure will move offshore of the nc outer banks
Wednesday night, and drift further east and out to sea through
Saturday. Southerly flow will develop across the southeast during
this time period. Temperatures will trend back to normal and
moisture will increase, bringing a return to the typical summertime
shower thunderstorm pattern. The risk of showers storms appears to
increase each day into the weekend.

Aviation 01z Monday through Friday
Risk for additional tstms at kchs ksav have diminished but
lighter rains may linger into the evening, especially at ksav.

Vfr conditions will prevail this evening, then chances for
MVFR ifr CIGS late tonight into mid morning Monday as light
surface winds become north in the wake of the cold front. The
latest rap NAM soundings show moisture below an inversion in the
boundary layer sufficient for low clouds and we have introduced
tempo MVFR CIGS at both terminals but at least a brief period
of ifr CIGS are certainly possible.

Monday afternoon: isolated to scattered convective rains are
possible in the afternoon, especially at ksav. Too early to
show any probs in the ksav TAF at this time.

Extended aviation outlook: flight restrictions are possible at times
through Tuesday, mainly due to showers and thunderstorms although
some fog will be possible Monday night.

Marine
Tonight: the general synoptic pattern does show a s-sw flow
around the atlantic ridge and in advance of the cold front,
before land breeze influences and the approach of the cold front
allows for veering winds overnight. On average winds will hold
below 15 kt with seas 2-3 ft. Widespread light rains will
persist with isolated overnight tstms still a possibility given
some residual instability.

Monday through Friday: a cold front will push southeast toward the
ga waters into Monday night before shifting farther south and east
as high pressure builds from the northwest through mid week. The
high will then shift offshore later this week. This will lead to an
enhancement in winds seas toward mid week as the gradient tightens
before conditions improve again late in the week.

Tides coastal flooding
Still doubts that we briefly touch our shallow coastal flooding
criteria of 7.0 ft mllw in downtown charleston with the high
tide around 10-1030 pm this evening. Even though some very
shallow coastal flooding may occur, rains have tapered off and
this will alleviate any more significant consequences.

The evening high tides will continue to be elevated through at
least Monday due to lingering astronomical influences. The
total departures will be driven by the position of the cold
front and the resulting winds that are either parallel to the
coast or onshore. Coastal flood advisories are still not out of
the question for the coastal areas from charleston county to
beaufort county.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... None.

Near term...

short term...

long term...

aviation...

marine...

tides coastal flooding...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ACXS1 - ACE Basin Reserve, SC 17 mi55 min Calm 76°F 1018 hPa75°F
41033 33 mi32 min S 7.8 G 12 79°F 84°F1017.9 hPa
CHTS1 44 mi40 min SW 1.9 G 1.9 78°F 84°F1018.5 hPa (+0.3)
FPKG1 - 8670870 - Fort Pulaski, GA 45 mi40 min W 4.1 G 5.1 77°F 85°F1018.6 hPa (-0.5)
FBIS1 - Folly Island, SC 45 mi40 min ESE 5.1 G 6 80°F 1018.9 hPa (-0.0)74°F

Wind History for Charleston, SC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Beaufort, Marine Corps Air Station, SC14 mi44 minN 010.00 miMostly Cloudy76°F75°F100%1018.3 hPa
Walterboro Lowcountry Regional Airport, SC17 mi45 minN 010.00 miPartly Cloudy73°F73°F100%1018.6 hPa
Beaufort County Airport, SC19 mi45 minN 07.00 miFair77°F75°F94%1017.9 hPa

Wind History from NBC (wind in knots)
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Last 24hrCalmNW5S4
G16
CalmCalmSW3CalmCalmCalmNW5CalmCalmSE3CalmS3NW6W4CalmNW3N3CalmS3NW3Calm
1 day agoS7
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S8SW12S6S5--S7NW3CalmCalm
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Tide / Current Tables for Bluff Plantation, Combahee River, South Carolina
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Bluff Plantation
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Sun -- 01:34 AM EDT     4.44 feet High Tide
Sun -- 06:16 AM EDT     Sunrise
Sun -- 07:47 AM EDT     -1.55 feet Low Tide
Sun -- 07:59 AM EDT     Moonrise
Sun -- 02:05 PM EDT     3.65 feet High Tide
Sun -- 07:58 PM EDT     -1.92 feet Low Tide
Sun -- 08:34 PM EDT     Sunset
Sun -- 10:08 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.74.34.43.82.71.3-0.2-1.2-1.5-10.11.42.63.33.63.42.51.3-0.2-1.4-1.9-1.5-0.31.2

Tide / Current Tables for Lobeco, Whale Branch, South Carolina
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Lobeco
Click for Map
Sun -- 05:24 AM EDT     -0.90 feet Low Tide
Sun -- 06:17 AM EDT     Sunrise
Sun -- 07:59 AM EDT     Moonrise
Sun -- 11:28 AM EDT     8.44 feet High Tide
Sun -- 05:34 PM EDT     -1.08 feet Low Tide
Sun -- 08:34 PM EDT     Sunset
Sun -- 10:08 PM EDT     Moonset
Sun -- 11:50 PM EDT     9.99 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
9.67.95.630.6-0.8-0.60.83.15.57.38.38.37.35.53.20.8-0.8-0.90.52.95.78.19.6

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 (23,6,7,8)
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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.