Wednesday, November14, 2018 L-36.com


Marine Weather and Tides
Tybee Island, GA

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 6:51AMSunset 5:25PM Wednesday November 14, 2018 6:30 PM EST (23:30 UTC) Moonrise 12:38PMMoonset 11:26PM Illumination 44% Phase: First Quarter Moon; Moon at 7 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- 551 Pm Est Wed Nov 14 2018
.gale warning in effect until 1 am est Thursday...
Tonight..NE winds 25 to 30 kt with gusts to 35 kt, becoming E 20 to 25 kt with gusts to 30 kt after midnight, then becoming se with gusts to 25 kt late. Seas 8 to 10 ft, subsiding to 7 to 9 ft after midnight. Rain developing.
Thu..W winds 15 to 20 kt with gusts to 25 kt, diminishing to 10 to 15 kt in the afternoon. Seas 4 to 6 ft, subsiding to 4 to 5 ft in the afternoon. Showers likely, mainly in the morning.
Thu night..NW winds 10 to 15 kt with gusts to 20 kt. Seas 3 to 4 ft.
Fri..NW winds 10 to 15 kt, diminishing to 5 to 10 kt in the afternoon. Seas 3 to 4 ft, subsiding to 2 to 3 ft in the afternoon.
Fri night..N winds 5 to 10 kt. Seas 2 to 3 ft.
Sat..NE winds 5 kt. Seas 3 ft.
Sat night..NE winds 5 kt, increasing to 10 kt after midnight. Seas 2 to 3 ft.
Sun..NE winds 10 kt. Seas 3 to 4 ft.
Sun night..N winds 10 kt. Seas 3 ft.
Mon..N winds 10 kt. Seas 2 to 3 ft.
Mon night..N winds 10 kt. Seas 2 to 3 ft.
AMZ300 551 Pm Est Wed Nov 14 2018
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. Low pressure will affect the area into Thursday with cool and dry high pressure then returning through this weekend. A cold front could move through early next week with a few showers followed by cool and dry high pressure once again into the middle of next week.


7 Day Forecast for Marine Location Near Tybee Island, GA
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location: 32.03, -80.85     debug


Area Discussion for - Charleston, SC
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Fxus62 kchs 142122
afdchs
area forecast discussion
national weather service charleston sc
422 pm est Wed nov 14 2018

Synopsis
Low pressure will affect the area into Thursday with cool and
dry high pressure then returning through this weekend. A cold
front could move through early next week with a few showers
followed by cool and dry high pressure once again into the
middle of next week.

Near term until 6 am Thursday morning
The mid-levels will consist of a cut-off low over arkansas this
evening. The low is forecasted to move to the northeast, over
the middle ms valley by daybreak. At the surface, low pressure
is starting to develop over fl this evening. The low is
forecasted to strengthen and move northeastward, paralleling
our coastline after midnight. Attached to the low will be a
surface trough that will stretch inland. This feature will pass
over our area overnight. A deep plume of moisture is in place
across the region. Pwats are forecasted to reach 2" along the
coast late tonight. This is 2-3 standard deviations above normal
per naefs. Radar indicates a large area of stratiform
precipitation approaching from the west and southwest. Both
synoptic models and the cams seem to do fairly well on the
timing of the heaviest precipitation, which we tried to account
for in the hourly pops. Simply put, we have pops increasing into
this evening, peaking across our area during the hours close to
and after midnight. It's possible that far southwestern areas
may start seeing clearing around daybreak. Instability is not
very impressive. In fact, the highest values are offshore. It's
not out of the question a coastal county or two may here a
rumble of thunder overnight. But the probabilities are too low
to include this potential over land. QPF is comparable to what
we had. It will become windy on the beaches and barrier islands
where the steepest pressure gradient is expected. Temperatures
will remain nearly steady, then gradually fall overnight.

Lake winds: wind gusts may briefly approach lake wind advisory
criteria tonight. But the minimal amount of time this will occur
along with marginal confidence will prevent us from issuing one.

Short term 6 am Thursday morning through Saturday
Relatively calm conditions will prevail through the period as low
pressure pulls away from the region and high pressure builds in from
the west. Rain will quickly end from southwest to northeast through
the day Thursday with dry conditions prevailing Thursday night into
Saturday. Clearing conditions will ensue Thursday in the wake of the
low with clear to mostly clear skies prevailing thereafter.

Temperatures will only warm into the mid-upper 50s Thursday and
Friday then moderate into the mid 60s by Saturday. Lows Friday night
will range from the mid 30s well inland to the mid-upper 40s at the
beaches. Could see patchy to scattered frost develop across the
far interior just before daybreak Saturday.

Long term Saturday night through Wednesday
Dry weather will prevail through early next week as cooler high
pressure moves into the area. A weak area of low pressure may
develop offshore and cause a few showers mainly near the coast.

Temperatures should mostly stay near normal.

Aviation 21z Wednesday through Monday
18z tafs:
kchs: ceilings are forecasted to drop to ifr this evening as
showers form in the vc of the airport. Additionally, gusty winds
will increase into the first part of the night as a low
approaches and then passes offshore. The worst conditions are
expected to be in the few hours after midnight, when moderate
rain will bring both low ceilings and visibilities.

Additionally, a strong 50 kt low level jet is expected to bring
a brief window of llws. Conditions will gradually improve around
daybreak Thursday as the low moves away. Though, ifr ceilings
may be slow to lift.

Ksav: ifr ceilings should prevail, even as showers form in the
vc of the airport into this evening. Additionally, gusty winds
will increase into the first part of the night as a low
approaches and then passes offshore. The worst conditions are
expected around midnight, when moderate rain will bring both low
ceilings and visibilities. Conditions will gradually improve
around daybreak Thursday as the low moves away. Though, ifr
ceilings may be slow to lift.

Extended aviation outlook: no concerns.

Marine
Tonight: gale warnings are in place for the ocean waters. A
small craft advisory is in place for the charleston harbor. The
combination of strong thermal and moisture gradients along with
low pressure passing along our coast will result in a steep
pressure gradient. Wind are expected to increase this evening,
peaking in the hours around midnight. Afterwards, winds should
start easing as the low moves away. Steep, wind-driven seas are
expected. Seas should peak at 6-10 ft within 20 nm and 12 foot
or greater closer to the gulf stream.

Thursday through Monday: conditions will gradually improve across
the local marine area Thursday as low pressure moves away from the
area. Seas are expected to drop below small craft advisory
thresholds Thursday morning across the nearshore waters and Thursday
afternoon for the georgia offshore waters Thursday evening. From
Friday on, northwest winds will turn northeast over the weekend with
speeds 15 kt or less. Seas will range 2-4 ft from Friday through
Monday.

High surf: gale conditions will cause seas to build into
tonight. Five foot breakers are expected in the surf zone,
especially along northeast facing beaches. A high surf advisory
is in effect.

Tides coastal flooding
Strengthening northeast winds will lead to increasing positive
tidal anomalies tonight. The high tide after midnight may see
greater than 2 ft departures at both downtown charleston and
fort pulaski. It looks unlikely that we will reach coastal flood
criteria. However, there remains a concern that steady rains
falling around that time may result in a mix of minor fresh and
salt water flooding.

Chs watches warnings advisories
Ga... High surf advisory until 5 am est Thursday for gaz117-119-139-
141.

Sc... High surf advisory until 5 am est Thursday for scz051.

High surf advisory until 8 am est Thursday for scz048>050.

Marine... Gale warning until 1 am est Thursday for amz352-354-374.

Gale warning until 3 am est Thursday for amz350.

Small craft advisory until 4 am est Thursday for amz330.

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
FPKG1 - 8670870 - Fort Pulaski, GA 3 mi30 min ENE 18 G 25 58°F 66°F1021.5 hPa (-1.1)
41033 29 mi22 min Calm G 0
ACXS1 - ACE Basin Reserve, SC 42 mi45 min NNE 5.1 55°F 1023 hPa51°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 44 mi40 min NE 23 G 25 67°F 72°F9 ft1018.4 hPa (-0.8)64°F
SAXG1 - Sapelo Island Reserve, GA 48 mi30 min NE 15 61°F 1020 hPa (-1.0)58°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, SC15 mi40 minNNE 1510.00 miOvercast57°F51°F82%1022.3 hPa
Hunter U. S. Army Airfield, GA16 mi94 minNNE 510.00 miOvercast57°F54°F89%1020.6 hPa
Savannah-Hilton Head International Airport, GA20 mi37 minNE 910.00 miOvercast56°F52°F87%1021.6 hPa

Wind History from HXD (wind in knots)
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Last 24hrNW6W6N9N8N85N8
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1 day agoNW3CalmCalmSE9
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S5CalmCalmCalmS8S10S8S7SW5NE9NE5NW8N11N8N7
2 days agoNE10NE10NE10N9N10N11N15N10N12N9N9N10
G15
N11NE12NE11NE11NE9NE7N5NE10NE7NE7NE5NE5

Tide / Current Tables for Tybee Light, Savannah River, Georgia
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Tybee Light
Click for Map
Wed -- 12:05 AM EST     6.14 feet High Tide
Wed -- 05:55 AM EST     1.41 feet Low Tide
Wed -- 06:51 AM EST     Sunrise
Wed -- 12:35 PM EST     6.72 feet High Tide
Wed -- 12:38 PM EST     Moonrise
Wed -- 05:24 PM EST     Sunset
Wed -- 06:47 PM EST     1.46 feet Low Tide
Wed -- 11:26 PM EST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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6.15.953.82.61.71.41.82.845.166.66.76.153.72.51.71.51.92.945

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Savannah River Entrance
Click for Map
Wed -- 01:29 AM EST     -0.00 knots Slack
Wed -- 03:57 AM EST     -1.35 knots Max Ebb
Wed -- 06:51 AM EST     Sunrise
Wed -- 07:31 AM EST     0.00 knots Slack
Wed -- 10:08 AM EST     1.54 knots Max Flood
Wed -- 12:38 PM EST     Moonrise
Wed -- 02:01 PM EST     -0.00 knots Slack
Wed -- 05:14 PM EST     -1.53 knots Max Ebb
Wed -- 05:24 PM EST     Sunset
Wed -- 08:16 PM EST     0.00 knots Slack
Wed -- 10:43 PM EST     1.56 knots Max Flood
Wed -- 11:26 PM EST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.90.4-0.4-1.1-1.4-1.2-1-0.40.41.21.51.41.10.70-0.8-1.4-1.5-1.5-1.1-0.30.71.41.5

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 (18,4,5,8)
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Ground Weather Radar Station Charleston, SC
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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.