Monday, October23, 2017 L-36.com


Marine Weather and Tides
Bluffton, 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 7:32AMSunset 6:42PM Monday October 23, 2017 8:15 PM EDT (00:15 UTC) Moonrise 9:53AMMoonset 8:36PM Illumination 15% Phase: Waxing Crescent; Moon at 4 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- 329 Pm Edt Mon Oct 23 2017
.small craft advisory in effect through late tonight...
Tonight..S winds 15 to 20 kt with gusts to 25 kt, becoming W 10 to 15 kt after midnight. Seas 4 to 6 ft. Showers with a chance of tstms this evening, then showers likely with a slight chance of tstms after midnight.
Tue..W winds 10 kt. Seas 3 to 4 ft. A slight chance of showers in the morning.
Tue night..W winds 10 to 15 kt, becoming nw 15 to 20 kt after midnight. Seas 3 to 4 ft.
Wed..NW winds 15 kt with gusts to 20 kt. Seas 3 to 4 ft, subsiding to 2 to 3 ft in the afternoon.
Wed night..NW winds 15 kt. Seas 2 to 3 ft.
Thu..N winds 10 to 15 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 3 ft.
Thu night..NE winds 5 to 10 kt. Seas 2 ft.
Fri..E winds 5 to 10 kt. Seas 2 ft.
Fri night..SE winds 5 to 10 kt. Seas 2 to 3 ft.
Sat..E winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance of showers.
Sat night..S winds 10 to 15 kt. Seas 2 to 3 ft. A slight chance of showers. Mariners are reminded that winds and seas higher in and near tstms.
AMZ300 329 Pm Edt Mon Oct 23 2017
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A cold front will push offshore tonight, then will be followed by a stronger cold front late Tuesday and Tuesday night. High pressure will then prevail into late week before another cold front possibly affects the area this weekend.

7 Day Forecast for Marine Location Near Bluffton, SC
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location: 32.24, -80.85     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 232334
afdchs
area forecast discussion
national weather service charleston sc
734 pm edt Mon oct 23 2017

Synopsis
A cold front will push offshore tonight, then will be followed
by a stronger cold front late Tuesday and Tuesday night. High
pressure will then prevail into late week before another cold
front possibly affects the area this weekend.

Near term until 6 am Tuesday morning
Late evening and tonight: latest water vapor imagery indicated a mid-
lvl low tracking northeast over eastern kentucky and tennessee this
evening with a large area of dry air punching eastward along the
southern periphery over a cold front now shifting through eastern
georgia and central south carolina. Ahead of this front, deep
moisture characterized by pwats near 2.0 inches within a south-
southeast flow will maintain widespread clouds and scattered to
numerous showers along with some embedded thunderstorms. As we head
into evening hours, the main issue will continue to focus on the
possibility of severe weather across parts of the region, mainly
with a broken line of heavy thunderstorms near along the advancing
cold front. Latest mesoanalysis and guidance suggests the mid upper
lvl trough to our northwest will maintain a slightly negative tilt
while shifting northeast with dry mid-lvl air intruding over the
cold front to the south, which will likely steepen mid-lvl lapse
rates as the front encounters SBCAPE between 1500-2000 j kg closer
to the southeast coast. Shear will be favorable for organized
convection, with 0-6 km bulk shear of 40-50 kt and 850-500mb crossover
winds supporting increasing levels of helicity over the region as
a west southwest flow spreads over a south southeast sfc wind.

Given the setup, a tornado watch remains in effect for parts of
the area until 9pm, with the main focus being over northern areas
in southeast south carolina where the combination of shear instability
are expected to be greatest during cold fropa.

The main threat for severe weather will come to an end once the cold
front passes through the area, which is beginning to unfold from
west to east this evening. Widespread showers along with embedded
thunderstorms will shift east with the front and will be followed by
much drier air from the west. For this reason, expect precip chances
to significantly decline from west to east between sunset and
midnight. Most areas should then be dry late tonight. Strong cold
air advection behind the front should help temps dip into the mid
50s inland to lower 60s near the coast.

Short term 6 am Tuesday morning through Thursday
The initial cold front will be offshore by daybreak Tuesday,
with significantly drier air filtering in from the west.

However, with the lack of appreciable cold air advection and
downslope flow off the surface, high temps will still climb into
the mid upper 70s.

The deep upper trough will push toward the southeast late
Tuesday, pushing a secondary dry cold front through the region
Tuesday night. This will yield low temps Wednesday and Thursday
morning in the 40s with daytime highs in the mid upper 60s.

Long term Thursday night through Monday
After another unseasonably cool start on Friday, temperatures will
moderate back closer to normal Friday afternoon into the mid 70s as
high pressure centered to the north moves offshore. A coastal trough
could develop Friday night and bring some light showers to the area.

Some uncertainty exists however beyond that time as the models
differ with respect to another cold front approaching from the west
and low pressure to the south and east. For now we stayed pretty
close to the wpc's guidance which has a cold frontal passage
Saturday night into Sunday. Temperatures will likely be near normal
through Saturday before falling below normal early next week,
possibly well below normal by Monday when some 30s are possible.

Aviation 00z Tuesday through Saturday
Gusty south winds peaking around 20-25 kt will be possible at
both terminals through early tonight. Tempo ifr conditions are
likely at the chs terminal between 00-01z tonight due to showers
and or thunderstorms impacting the terminal. MVFR CIGS are then
likely at both terminals for a few hours ending between 03-05z
tonight due to low cigs.VFR conditions will then prevail late
tonight at both terminals as winds become westerly.

Extended aviation outlook: no significant concerns tue-sat.

Marine
This evening and tonight: south southeast winds will remain elevated
within a tight pressure gradient ahead of a cold front approaching
from the west early tonight. In general, southeast south winds will
gust near 20-25 kt, highest in nearshore south carolina waters and
offshore georgia waters. Seas will also range between 4-7 ft,
highest in nearshore south carolina waters and offshore georgia
waters. For these reasons, small craft advisories will continue for
nearshore south carolina waters and offshore georgia waters this
through much of tonight.

A band of showers thunderstorms will approach the marine zones
with a cold front, slowly tracking east through the waters early
tonight. The environment could support strong wind gusts and or
isolated waterspouts, especially along near the cold front. A
tornado watch remains in effect for the charleston harbor
through 9 pm, but isolated waterspouts will remain a threat for
all coastal waters until cold FROPA occurs. The passage of the
sfc cold front will result in winds becoming west- northwest
late. Despite cold air advection behind the front, winds will
decrease to around 10-15 kt late.

Marine conditions will temporarily improve on Tuesday, allowing
the small craft advisory for the offshore ga waters to drop
midday. However, a period of marginal SCA conditions is possible
late Tuesday night through Wednesday morning after a secondary
cold front and more significant blast of cold air advection. We
show gusts approaching 25 kt mainly over the ga waters during
this time.

Much improved conditions will return by Thursday as high pressure
builds back in and persists through Friday. Another cold front
could approach the waters Saturday but much uncertainty remains
with the forecast this weekend.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... Small craft advisory until 5 am edt Tuesday for amz352.

Small craft advisory until 11 am edt Tuesday for amz350-374.

Near term... Dpb
short term... Jrl
long term... Rjb
aviation... Dpb jrl
marine... Dpb jrl


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 14 mi45 min SSW 13 G 21 75°F 74°F1012.2 hPa
41033 23 mi67 min S 21 G 29 78°F
ACXS1 - ACE Basin Reserve, SC 30 mi90 min SSE 4.1 76°F 1011 hPa74°F

Wind History for Fort Pulaski, GA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hilton Head Island, Hilton Head Airport, SC8 mi85 minS 11 G 201.25 miThunderstorm Heavy Rain77°F73°F89%1011.2 hPa
Beaufort County Airport, SC17 mi40 minSSW 17 G 277.00 miMostly Cloudy73°F71°F94%1011.2 hPa
Beaufort, Marine Corps Air Station, SC18 mi19 minS 1010.00 miThunderstorm in Vicinity76°F75°F97%1011.6 hPa
Savannah-Hilton Head International Airport, GA20 mi22 minSSW 1110.00 miPartly Cloudy75°F73°F94%1011.9 hPa
Hunter U. S. Army Airfield, GA22 mi19 minSSW 710.00 miMostly Cloudy75°F72°F91%1011.8 hPa

Wind History from HXD (wind in knots)
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Last 24hrNE55CalmCalmCalmCalmSE33444SE6SE6
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1 day agoNE5NE6NE7NE7NE6NE76NE6NE4N6NE6N8N8NE8NE8NE8NE8NE8E6E6E7NE8N8NE5
2 days agoCalmCalmCalmCalmCalmNE3CalmNE3NE3CalmCalmN5N5N7N7N7N7N7NE8NE10NE9----NE9

Tide / Current Tables for Bluffton, May River, South Carolina
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Bluffton
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Mon -- 05:31 AM EDT     0.86 feet Low Tide
Mon -- 07:33 AM EDT     Sunrise
Mon -- 10:52 AM EDT     Moonrise
Mon -- 12:06 PM EDT     8.81 feet High Tide
Mon -- 06:10 PM EDT     1.05 feet Low Tide
Mon -- 06:41 PM EDT     Sunset
Mon -- 09:36 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
8.27.45.842.21123.75.67.28.48.88.57.35.63.61.91.11.42.74.367.2

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
Click for Map
Mon -- 02:59 AM EDT     -1.61 knots Max Ebb
Mon -- 05:59 AM EDT     0.00 knots Slack
Mon -- 07:33 AM EDT     Sunrise
Mon -- 08:32 AM EDT     1.93 knots Max Flood
Mon -- 10:51 AM EDT     Moonrise
Mon -- 12:27 PM EDT     -0.00 knots Slack
Mon -- 04:02 PM EDT     -1.83 knots Max Ebb
Mon -- 06:41 PM EDT     0.00 knots Slack
Mon -- 06:41 PM EDT     Sunset
Mon -- 09:00 PM EDT     1.76 knots Max Flood
Mon -- 09:37 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0-1-1.5-1.6-1.5-101.11.81.91.510.4-0.5-1.3-1.7-1.8-1.6-0.80.41.41.81.51

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 (20,4,5,8)
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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.