Wednesday, March29, 2017 L-36.com


Marine Weather and Tides
Tybee Island, GA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 7:13AMSunset 7:43PM Wednesday March 29, 2017 7:10 AM EDT (11:10 UTC) Moonrise 7:29AMMoonset 8:36PM 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
    EDIT      (on/off)   Help
AMZ352 Waters From Edisto Beach Sc To Savannah Ga Out 20 Nm- 327 Am Edt Wed Mar 29 2017
Today..W winds 5 to 10 kt...becoming N late this morning and early afternoon...then becoming E late. Seas 3 to 4 ft... Subsiding to 2 to 3 ft this afternoon.
Tonight..E winds 5 to 10 kt. Seas 3 ft.
Thu..E winds 10 to 15 kt. Seas 3 to 4 ft. A slight chance of showers in the morning...then a chance of showers with a slight chance of tstms in the afternoon.
Thu night..SE winds 15 kt with gusts to 20 kt. Seas 3 to 4 ft... Building to 4 to 5 ft after midnight. A slight chance of tstms. A chance of showers...mainly after midnight.
Fri..S winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 5 ft. A chance of tstms. Showers likely.
Fri night..SW winds 15 to 20 kt with gusts to 25 kt...becoming W 10 to 15 kt after midnight. Seas 4 to 5 ft...subsiding to 3 to 4 ft after midnight. A chance of showers and tstms in the evening.
Sat..W winds 10 kt. Seas 3 to 4 ft.
Sat night..SW winds 5 to 10 kt. Seas 2 ft.
Sun..NE winds 5 to 10 kt. Seas 2 ft.
Sun night..SE winds 10 kt. Seas 2 ft. Mariners are reminded that winds and seas can be higher in and near tstms.
AMZ300 327 Am Edt Wed Mar 29 2017
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. A weak front will sag south over the area today...then move north as a warm front Thursday night. A cold front will move through Friday night followed by dry high pressure into Sunday. Unsettled weather should return again next Monday, possibly lasting into Tuesday.

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


Area Discussion for - Charleston, SC
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus62 kchs 290813
afdchs
area forecast discussion
national weather service charleston sc
413 am edt Wed mar 29 2017

Synopsis
A weak front will sag south over the area today, then move north as
a warm front Thursday night. A cold front will move through Friday
night followed by dry high pressure into Sunday. Unsettled weather
should return again next Monday, possibly lasting into Tuesday.

Near term /through tonight/
Pre-dawn: tranquil conditions will persist with mainly clear
skies and light/variable winds. There could be some patchy
ground fog in spots were some of the showers fell yesterday
in southeast sc, no significant vsby reductions are anticipated.

Today: mid and upper level ridging will build across the ga and
the carolinas, maintaining above average temperatures and
generally dry weather. Surface high pressure building to the
northwest and north, will push a weak cold front into the
forecast area. There is not much of a thermal gradient with the
front and it's main impact will be subtle wind shifts this
morning over south carolina. High temps will once again be in
the mid 80s many areas today, the beaches and barrier islands
should remain quite a bit cooler with onshore afternoon flow. We
have a slight chance of brief showers with the sea breeze
closer to the altamaha river later this afternoon but too much
subsidence aloft to support any deeper convection.

Tonight: a bit of tricky forecast with a light onshore and
upslope flow. This synoptic pattern along with elevated surface
dew points favor some stratus development overnight and this
was supported by several 00z model solutions. With low level
winds picking up a bit late, it looks a bit doubtful we will see
significant fog from build-down stratus, but there was enough
evidence to introduce some patchy fog around the savannah river
entrance south into coastal ga. Lows will be in the upper 50s
north to lower 60s south.

Short term /Thursday through Saturday/
A stalled front across southeast ga Thursday will shift north as a
warm front Thursday night followed by a cold front Friday night.

Rain chances will ramp up toward Thursday afternoon when deeper
moisture and isentropic ascent increase across the area. Thus,
showers and possibly a few thunderstorms (mainly across ga) are
expected Thursday afternoon/evening with a lull likely, especially
across ga, before increasing again toward daybreak Friday as
stronger synoptic forcing arrives. Precipitation should taper off
later Friday as the deepest moisture shifts northeast of the area.

Although wind fields will be strong Friday, instability appears
minimal and thus the threat for severe weather is low at this time.

Either way it should be a breezy day with gusts up to around 25-30
mph. Any lingering showers near the sc coast should end Friday
evening as a cold front moves through with dry conditions the rest
of the night into Saturday.

On Thursday temperatures will be a bit cooler than Wednesday behind
the front, especially across sc where it should stay below 80
degrees except close to the savannah river. Temperatures Friday will
be moderated by the clouds/rain, likely only reaching close to 80
inland with a slight warmup Saturday as slight cool advection likely
gets overcome by some downslope warming.

Long term /Saturday night through Tuesday/
Dry high pressure to prevail through Sunday night although moisture
will be increasing toward Monday morning as low-level jetting ramps
up ahead of approaching low pressure from the west. Unsettled
weather is expected Monday into Tuesday although timing is a bit
uncertain at this point. Mid-level ridging should keep things dry
and quite warm Wednesday, possibly near record levels in ga.

Otherwise, temperatures should remain above normal through the
period.

Aviation /08z Wednesday through Sunday/
Vfr at ksav and kchs through 06z Thursday. Small chances for
lower CIGS developing/advecting off the atlantic later tonight.

Extended aviation outlook: restrictions likely due to
showers/thunderstorms/low clouds, mainly Thu night into fri. Breezy
conditions expected fri.

Marine
Today: a weak cold front will drift into the waters today and
lose definition late as it mingles with the sea breeze
oscillations. Winds will gradually veer onshore and increase
close to 15 kt across charleston waters by early this evening
into tonight. Ga waters will see light offshore winds early this
morning becoming onshore later today and tonight, speeds will
be closer to 10 kt. Seas will average 2-3 ft near shore with 3-4
ft offshore and some 5 footers out closer to the gulf stream.

Thursday through Monday: a warm front will shift north through the
area Thursday night/Friday. A cold front will then move through
Friday night/early Saturday. At some point prior to the cold frontal
passage sea fog could develop across the cooler near shore waters
and lead to low visibilities. Conditions will go downhill again
Monday as a storm system approaches from the west.

Expect a high chance for advisories Thursday night across the outer
waters, expanding northward into the sc waters into Friday night as
strengthening winds build seas to 6-7 feet, highest toward the gulf
stream.

Rip currents: moderate risk for rip currents along the sc coast
today. Winds becoming onshore and increasing late along with
long period 2-3 foot swells may produce rip currents. The
combination of higher than normal tides, onshore winds and
swells in the surf zone will support an enhanced risk for rip
currents, possibly lasting into Friday.

Tides/coastal flooding
Strengthening onshore winds combined with swells impacting the coast
will cause saltwater inundation, especially in vulnerable coastal
areas. The high tides this evening and again on Thursday morning
could reach advisory levels, especially in sc. The Thursday
evening high tide could approach warning levels. Coastal flood
headlines are expected with each of these tide cycles.

Chs watches/warnings/advisories
Ga... None.

Sc... None.

Marine... None.

Near term...

short term... Rjb
long term... Rjb
aviation... Rjb
marine... Rjb
tides/coastal flooding...



Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FPKG1 - 8670870 - Fort Pulaski, GA 3 mi41 min WNW 4.1 G 4.1 66°F 66°F1014.9 hPa
41033 29 mi63 min W 5.8 G 9.7 65°F 63°F1014 hPa
ACXS1 - ACE Basin Reserve, SC 42 mi86 min Calm 61°F 1014 hPa61°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 44 mi81 min W 5.8 G 7.8 67°F 65°F3 ft1014.2 hPa (-0.6)62°F
SAXG1 - Sapelo Island Reserve, GA 48 mi71 min WNW 1.9 66°F 1015 hPa (-0.0)62°F

Wind History for Fort Pulaski, GA
(wind in knots)    EDIT      (on/off)   Help
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
Last
24hr
W5
SW4
W6
G11
W5
G8
SW5
G8
W8
G11
SW5
G9
SW11
G16
S8
G11
S7
G13
S10
G15
SW9
G14
SW9
G12
SW7
G10
SW8
G11
SW6
SW7
SW5
SW4
SW5
SW3
W4
W4
W3
1 day
ago
W1
SE2
S4
S4
SW4
S5
G9
S7
G11
S7
G11
S8
G14
S6
G12
S6
G13
S6
G12
S7
S5
G8
S4
G8
S4
S4
G7
S4
S3
G7
S6
G10
SW6
G9
SW5
G8
SW4
SW3
G6
2 days
ago
SE6
G9
SE4
G7
S7
S7
G14
S8
G12
S7
G10
S10
G13
S6
G11
S8
G12
S8
G12
S6
G11
S4
G7
S7
G10
SE4
G7
SE5
SE3
SE5
G8
SE4
SE4
SE4
SE4
SE3
G7
S2
SW1

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hilton Head Island, Hilton Head Airport, SC15 mi21 minN 010.00 miClear66°F60°F83%1015.2 hPa
Hunter U. S. Army Airfield, GA16 mi13 minN 010.00 miFair61°F61°F100%1014.5 hPa
Savannah, Savannah International Airport, GA20 mi18 minW 310.00 miA Few Clouds62°F57°F86%1015.1 hPa

Wind History from HXD (wind in knots)
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
Last 24hrSW10SW10----SW8SW8SW8S10S13--S12S13S106S7S6S6S7SW5SW5SW4W6W5Calm
1 day agoCalmS4S6S9SE9SE9S9SE5
G14
S8
G14
S9
G16
S8
G16
S7S7S8
G13
S6S5S76S6S9S9S7S8SW5
2 days agoSE5SE5SE5SE5SE5SE5SE5----S6
G13
SE6SE4Calm3CalmS33Calm3CalmSE4S3CalmCalm

Tide / Current Tables for Tybee Light, Savannah River, Georgia
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Tybee Light
Click for Map
Wed -- 03:40 AM EDT     -1.04 feet Low Tide
Wed -- 07:15 AM EDT     Sunrise
Wed -- 08:28 AM EDT     Moonrise
Wed -- 09:40 AM EDT     7.80 feet High Tide
Wed -- 04:00 PM EDT     -1.13 feet Low Tide
Wed -- 07:41 PM EDT     Sunset
Wed -- 09:36 PM EDT     Moonset
Wed -- 09:57 PM EDT     8.44 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.92.80.7-0.7-10.22.24.56.47.67.775.43.51.3-0.4-1.1-0.41.64.16.488.47.9

Tide / Current Tables for Savannah River Entrance, Georgia Current
   EDIT      (on/off)   Help   One Week of Data
Savannah River Entrance
Click for Map
Wed -- 01:33 AM EDT     -2.66 knots Max Ebb
Wed -- 04:50 AM EDT     0.01 knots Slack
Wed -- 07:15 AM EDT     Sunrise
Wed -- 07:27 AM EDT     2.62 knots Max Flood
Wed -- 08:28 AM EDT     Moonrise
Wed -- 11:05 AM EDT     -0.01 knots Slack
Wed -- 02:06 PM EDT     -2.55 knots Max Ebb
Wed -- 05:08 PM EDT     0.01 knots Slack
Wed -- 07:41 PM EDT     Sunset
Wed -- 07:47 PM EDT     2.93 knots Max Flood
Wed -- 09:36 PM EDT     Moonset
Wed -- 11:23 PM EDT     -0.01 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1.9-2.6-2.6-2.2-1.20.31.72.52.51.91.10.1-1.2-2.2-2.6-2.4-1.6-0.21.42.62.92.41.50.5

Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Southeast    EDIT
Geos

Wind Forecast for Charleston, SC (7,2,3,4)
      (on/off)   Help

Ground Weather Radar Station Charleston, SC
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.