Wednesday, February20, 2019 L-36.com


Marine Weather and Tides
Bluffton, SC

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:59AMSunset 6:14PM Wednesday February 20, 2019 10:05 AM EST (15:05 UTC) Moonrise 7:39PMMoonset 7:55AM Illumination 99% Phase: Waning Gibbous; Moon at 16 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- 708 Am Est Wed Feb 20 2019
.small craft advisory in effect until noon est today...
Today..NE winds 15 to 20 kt with gusts to 25 kt, becoming se 5 to 10 kt late this morning. Seas 5 to 7 ft, subsiding to 4 to 6 ft this afternoon. Showers likely, mainly this morning.
Tonight..SE winds 5 to 10 kt, becoming S 10 to 15 kt after midnight. Seas 4 to 5 ft. A chance of showers. Patchy fog in the evening. Areas of dense fog after midnight.
Thu..SW winds 10 to 15 kt. Seas 4 to 5 ft, subsiding to 3 to 4 ft in the afternoon. A slight chance of showers in the morning. Areas of fog.
Thu night..SW winds 5 to 10 kt. Seas 3 to 4 ft. A slight chance of showers. Patchy fog in the evening. Areas of fog after midnight.
Fri..S winds 5 kt, becoming E 10 to 15 kt in the afternoon. Seas 3 ft. A slight chance of showers.
Fri night..NE winds 10 to 15 kt. Seas 3 to 4 ft. A slight chance of showers.
Sat..SE winds 5 to 10 kt. Seas 3 to 4 ft. A slight chance of showers.
Sat night..S winds 10 to 15 kt. Seas 3 to 4 ft. A slight chance of showers.
Sun..SW winds 15 to 20 kt. Seas 4 to 5 ft. A chance of showers.
Sun night..NW winds 15 kt. Seas 3 to 4 ft.
AMZ300 708 Am Est Wed Feb 20 2019
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A nearly stationary front will meander near the area through Saturday morning. A cold front will sweep through from the west late Sunday, followed by high pressure on Monday. A low pressure system could affect the area next Tuesday.


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 201227
afdchs
area forecast discussion
national weather service charleston sc
727 am est Wed feb 20 2019

Synopsis
A nearly stationary front will meander near the area through
Saturday morning. A cold front will sweep through from the west
late Sunday, followed by high pressure on Monday. A low
pressure system could affect the area next Tuesday.

Near term through tonight
As of 640 am: light rain will continue to spread across the sc
lowcountry and portions of SE ga this morning. Despite the light
rain, temperatures continue to slowly warm across the cwa. I
will issue a update to align temperatures to observations.

As of 415 am: nam12 indicated widespread isentropic lift between
295-305k from early this morning until mid day. The isentropic
lift will remain west ahead of a inland bound sfc trough warm
front. Deep moisture and llvl forcing should support rounds of
light rainfall this morning, generally lifting north of the
forecast area this afternoon. Rainfall amounts are forecast to
range from around .4" across portions of berkeley and northern
charleston counties to less than a tenth across inland ga. High
temperatures will be quite challenging today, largely dependent
on the placement and timing of the warm front. Following the
latest warming morning temps and latest mos, I will forecast
high temps from the mid 70s across altamaha river border
counties to near 60 far inland.

Tonight: the warm front will completely lift north of the
forecast area as a cold front slides east off the southern
appalachians. Winds across the CWA is forecast to shift from the
south late this evening and will remain through tonight. Sfc
dewpoints are expected to warm into the low 60s by midnight.

Near shore buoys indicate that water temperatures remain in the
mid 50s. Warm and moisture return flow across the cooler shelf
waters will favor the development of sea fog, building over the
coast with time. At this time, it is uncertain if the fog will
become widespread and dense or remain patchy dense. Low
temperatures around 60 will be common tonight.

Short term Thursday through Saturday
The area should be solidly in the warm-sector on Thursday with
the front to the north. We may see some brief, partial clearing
during the daytime hours. Temps soaring into the upper 70s to
lower 80s and dewpoints in the low to mid 60s will produce
modest surface-based instability. We held onto a slight chance
of showers given weak upper shortwave energy propagating through
the area.

Thursday night the front to our north will begin shifting south,
potentially moving into our far northern zones close to daybreak
Friday. Isentropic ascent will gradually increase overnight with
scattered showers possible, mainly inland. Conditions look ripe
for areas of fog to develop along and south of the front.

The backdoor cold front will drop south to near the savannah
river on Friday, allowing northeast flow to redevelop over
southern sc. Isentropic ascent will strengthen from north to
south during the day, likely producing scattered showers mainly
over southern sc, highest coverage inland. High temps will range
from lower 60s far north to lower 80s far south.

The stalled front will remain across the area through Friday
night, then slowly move north on Saturday. Rain chances will
gradually dwindle during this period. Highs on Saturday will be
in the mid to upper 70s in most locations.

Long term Saturday night through Tuesday
A potent cold front will sweep through the area Sunday afternoon
though only scattered showers are expected to accompany it.

Strong warm air advection ahead of the front will produce high
temps in the upper 70s on Sunday. Somewhat cooler weather is in
store for Monday through Wednesday as a series of high pressure
areas move into the area. A gulf low pressure system could bring
some rain to the area Tuesday and Tuesday night.

Aviation 13z Wednesday through Sunday
The pressure gradient between inland high pressure and a trough
over the near shore waters will support steady NE winds through
early this morning. The coastal trough will drift slowly
onshore during the daylight hours, becoming a warm front. Low
level lift ahead of the coastal trough warm front will support
ifr to MVFR ceilings and periods of light rain. The warm front
is forecast to slide west of the terminals by this evening. Flow
will shift from the south and sea fog is expected to develop
across the shelf waters, then advect onshore impacting the
terminals as ifr ceilings and possibly ifr visibility.

Extended aviation outlook: low ceilings are likely Wednesday
night through Thursday morning. Low ceilings and or reduced
visibility likely Thursday night through Saturday morning.

Marine
I will update to remove gale warning for amz350 and replace it
with a small craft advisory until midnight. I will also remove
the advisory for the harbor.

Previous discussion:
today: ridging high pressure this morning will shift inland as
an inverted trough warm front slides across the near shore
waters today. Early this morning, gusty NE winds should continue
across the marine area, weakening steadily around dawn. Small
craft advisory for the chs harbor will remain until 7am. Outside
the harbor, seas will gradually improve through the daylight
hours into tonight. Conditions will see the earliest improvement
across the near shore ga waters. Remaining gale warning for
amz350 is expected to be replaced by a small craft by 7 am.

Tonight: in the wake of the passing warm front, winds will
remain steady from the sw. Sfc dewpoints are expected to warm
into the low 60s by midnight. Near shore buoys indicate that
water temperatures remain in the mid 50s. Warm and moisture
return flow across the cooler shelf waters will favor the
development of sea fog, building over the coast with time. At
this time, it is uncertain if the fog will become widespread and
dense or remain patchy dense. Wave heights of six feet should be
limited to the outer portions of amz350 and 374.

A brief window for small craft advisory conditions will exist
late Friday night over the charleston sc nearshore waters behind
a backdoor cold front. More widespread SCA conditions are
possible Sunday ahead of a cold front.

The more significant concern is the likely development and
persistence of sea fog due to surface dewpoints in the low to
mid 60s moving over the cool shelf waters. The most likely time
frame will be Thursday and Thursday night when low-level flow is
southerly. By midday Friday the winds will be northeast which is
less favorable.

Tides coastal flooding
This morning's high tide is likely to be the highest of the
week given the gusty northeast winds along the coast. Major
coastal flooding is possible along the southeast south carolina
and southeast georgia coast, a coastal flood warning is in
effect until 11 am. A coastal flood advisory is in effect for
tidal berkeley co. Until 11 am.

This evening's astronomical high tide is the lower of the two
for the day. Wind directions are forecast to shift from the
south by then, but residual anomalies could allow tides to
approach advisory criteria at least at charleston.

Chs watches warnings advisories
Ga... Coastal flood warning until 11 am est this morning for gaz117-
119-139-141.

Sc... Coastal flood warning until 11 am est this morning for
scz048>051.

Coastal flood advisory until 11 am est this morning for scz052.

Marine... Small craft advisory until noon est today for amz352-354.

Small craft advisory until midnight est tonight for amz350.

Small craft advisory until 4 pm est Thursday for amz374.

Near term... Ned
short term... Jrl
long term... Jrl
aviation... Jrl ned
marine... Jrl ned
tides coastal flooding...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 14 mi36 min NE 9.9 G 13 58°F 56°F1022.1 hPa
41033 24 mi58 min NNE 12 G 18 58°F 1021.7 hPa
ACXS1 - ACE Basin Reserve, SC 30 mi81 min N 2.9 53°F 1023 hPa53°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 58 mi76 min SSE 1.9 G 5.8 63°F 58°F6 ft1021.1 hPa (+1.0)62°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 mi76 minN 124.00 miFog/Mist57°F57°F100%1022.7 hPa
Beaufort County Airport, SC17 mi71 minNNE 105.00 miFog/Mist54°F51°F94%1022.7 hPa
Beaufort, Marine Corps Air Station, SC18 mi70 minN 61.50 miFog/Mist52°F52°F100%1023.1 hPa
Savannah-Hilton Head International Airport, GA20 mi73 minN 58.00 miOvercast53°F52°F96%1022.5 hPa
Hunter U. S. Army Airfield, GA22 mi70 minNNE 410.00 miOvercast57°F55°F93%1021.6 hPa

Wind History from HXD (wind in knots)
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SW4W3W3CalmSW3CalmCalmCalmCalmCalmN7N7N6N4NE6NE6NE10
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2 days agoNE6NE6NE5NE4NE7E6NE4E4CalmCalmSE3CalmCalmS8S11
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Tide / Current Tables for Bluffton, South Carolina (2)
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Bluffton
Click for Map
Wed -- 03:02 AM EST     -1.94 feet Low Tide
Wed -- 07:01 AM EST     Sunrise
Wed -- 07:54 AM EST     Moonset
Wed -- 09:28 AM EST     9.98 feet High Tide
Wed -- 03:32 PM EST     -1.58 feet Low Tide
Wed -- 06:13 PM EST     Sunset
Wed -- 07:38 PM EST     Moonrise
Wed -- 09:56 PM EST     9.25 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.41.5-0.9-1.9-1.20.93.76.58.79.99.88.46.13.30.5-1.3-1.4-02.34.97.38.89.28.5

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
Click for Map
Wed -- 12:35 AM EST     -2.61 knots Max Ebb
Wed -- 03:18 AM EST     0.00 knots Slack
Wed -- 06:02 AM EST     2.93 knots Max Flood
Wed -- 07:00 AM EST     Sunrise
Wed -- 07:54 AM EST     Moonset
Wed -- 09:42 AM EST     -0.00 knots Slack
Wed -- 12:59 PM EST     -2.81 knots Max Ebb
Wed -- 03:51 PM EST     0.01 knots Slack
Wed -- 06:13 PM EST     Sunset
Wed -- 06:27 PM EST     2.59 knots Max Flood
Wed -- 07:38 PM EST     Moonrise
Wed -- 10:06 PM EST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-2.5-2.6-1.9-0.51.22.52.92.621-0.5-1.8-2.6-2.8-2.5-1.40.21.72.52.521.30.1-1.2

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 (10,2,3,4)
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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.