Friday, November17, 2017

Marine Weather and Tides
Tybee Island, GA

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 6:54AMSunset 5:24PM Friday November 17, 2017 7:38 PM EST (00:38 UTC) Moonrise 5:57AMMoonset 5:15PM Illumination 1% Phase: Waning Crescent; Moon at 29 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- 631 Pm Est Fri Nov 17 2017
Tonight..E winds 5 to 10 kt. Seas 3 to 4 ft, subsiding to 2 to 3 ft after midnight.
Sat..S winds 5 to 10 kt, becoming sw 10 to 15 kt with gusts to 20 kt in the afternoon. Seas 2 to 3 ft.
Sat night..SW winds 15 to 20 kt with gusts to 25 kt. Seas 3 to 4 ft, building to 4 to 6 ft after midnight. A chance of showers after midnight.
Sun..NW winds 15 to 20 kt with gusts to 25 kt. Seas 3 to 4 ft, subsiding to 2 to 3 ft in the afternoon. A chance of showers in the morning.
Sun night..N winds 15 kt with gusts to 20 kt. Seas 2 to 3 ft.
Mon..NE winds 10 to 15 kt. Seas 2 to 3 ft.
Mon night..E winds 10 kt. Seas 2 ft.
Tue..E winds 10 kt. Seas 2 ft. A slight chance of showers.
Tue night..NE winds 5 to 10 kt. Seas 3 ft. A chance of showers.
Wed..NE winds 10 kt. Seas 3 to 4 ft. A slight chance of showers.
Wed night..NE winds 10 kt. Seas 3 to 4 ft.
AMZ300 631 Pm Est Fri Nov 17 2017
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia.. High pressure will prevail through Saturday with a mainly dry cold front passing through Saturday night into Sunday morning. High pressure will then return through much of next week, although at least one low pressure system could affect the area mid to late next week.

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

Area Discussion for - Charleston, SC
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Fxus62 kchs 172346
area forecast discussion
national weather service charleston sc
646 pm est Fri nov 17 2017

High pressure will prevail through Saturday with a mainly dry
cold front passing through Saturday night into Sunday morning.

High pressure will then return through much of next week,
although at least one low pressure system could affect the area
mid to late next week.

Near term until 6 am Saturday morning
Tonight: no significant changes were made to previous forecast. A
mid upper lvl low will push further off the northeast coast,
helping maintain a northwesterly flow aloft over the southeast
united states. At the sfc, high pressure centered over the mid-
atlantic states will shift offshore tonight, allowing light
northeast winds to become more southerly overnight. Given the
setup, dry conditions will persist through the night while winds
decouple under favorable radiational cooling conditions.

However, the light onshore wind along with a few strato-cu clouds
could drift onshore late, especially south of the savannah
river, will help keep temps warmer tonight than the previous
night. In general, lows should dip into the lower middle 40s
inland and upper 40s lower 50s near the coast. Shallow, patchy
ground fog is possible, mainly over the south ga zones, but
confidence not high enough to put in forecast.

Short term 6 am Saturday morning through Monday
Pretty good model agreement this period leads to high forecast
confidence. High pressure will be giving way to an approaching cold
front Saturday but increasing southerly winds will bring warmer
temperatures. The front is expected to move through Saturday night
into Sunday morning but limited moisture will only bring small rain
chances to the area. Cooler temperatures will move in behind the
front Sunday into Monday and could be cold enough mid 30s Monday
morning for some frost across inland areas. Can't even completely
rule out freezing temperatures in the normally colder inland rural
spots, mainly toward the csra midlands where winds should be less.

Lake winds... Winds will increase on lake moultrie Saturday night
into Sunday as a cold front passes through the area, possibly
reaching marginal advisory levels.

Long term Monday night through Friday
Dry high pressure is expected to prevail much of next week but
a gulf surface low could lift northeast late in the week and
potentially bring some precipitation.

Aviation 00z Saturday through Wednesday
Tonight:VFR conditions still expected to prevail through 00z
Sunday. Some strato-cu could move into ksav after 08z tonight,
but think it will stayVFR. Patchy shallow ground fog possible
late, especially ksav,but probabilities not high enough to
mention in taf.

Extended aviation outlook: brief minor restrictions possible
Saturday night into Sunday morning due to low clouds showers
with a passing cold front. Breezy gusty conditions over 20 knots
at times Saturday afternoon through Sunday afternoon.

Rest of tonight: no significant changes made. A northeast
oriented pressure gradient within a high pressure regime will
produce northeast winds around 15 kt and seas as high as 3-5 ft
this evening, but expect condition to improve later in the
evening as the main center of high pressure to our north
reaches the mid-atlantic coast. Overnight, the pressure
gradient will begin to relax as the center of high pressure to
our north shifts off the mid-atlantic coast. The pattern change
will eventually turn winds from northeast to southeast
overnight. In general, winds will diminish to 5-10 kt after
midnight while seas range between 2-4 ft.

Saturday through Wednesday: conditions will go downhill Saturday as
the pressure gradient tightens ahead of an approaching cold front
but should stay below advisory levels until Saturday night when the
front passes. Best chances appear to be across the sc waters outside
charleston harbor and across the ga offshore waters. Conditions will
then improve later Sunday with some deterioration again toward mid
week when another cold front is expected to move through Tuesday
night, although no advisories are anticipated at this time.

Chs watches warnings advisories
Ga... None.

Sc... None.

Marine... None.

Near term... Dpb rfm
short term... Rjb
long term... Jrl
aviation... Dpb rjb
marine... Dpb rjb

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
41033 29 mi90 min ENE 12 G 19 57°F 63°F1020.1 hPa
ACXS1 - ACE Basin Reserve, SC 42 mi113 min E 1 55°F 1021 hPa47°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 44 mi108 min ENE 16 G 19 65°F 68°F5 ft1019.1 hPa (+0.0)57°F
SAXG1 - Sapelo Island Reserve, GA 48 mi98 min NNE 6 59°F 1020 hPa (+0.0)56°F

Wind History for Fort Pulaski, GA
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1 day
2 days

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hilton Head Island, Hilton Head Airport, SC15 mi48 minNE 610.00 miClear57°F50°F77%1021 hPa
Hunter U. S. Army Airfield, GA16 mi42 minE 610.00 miFair55°F47°F77%1019.9 hPa
Savannah-Hilton Head International Airport, GA20 mi45 minE 610.00 miA Few Clouds56°F48°F75%1020.5 hPa

Wind History from HXD (wind in knots)
Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmCalm--NE8NE10NE12NE11NE8NE8NE8NE8NE8NE8--NE6NE6NE5
1 day agoN4CalmNE4CalmCalmCalmCalmCalmNW4--NW5NW5NW5NW5NW5NW7NW7NW7--CalmCalmCalmCalmCalm
2 days agoN11N14N13NE12N10NE13

Tide / Current Tables for Tybee Light, Savannah River, Georgia
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Tide / Current data from XTide NOT FOR NAVIGATIONSorry tide depth graphs only, please select another station.

Tide / Current Tables for Savannah River Entrance, Georgia Current
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Tide / Current data from XTide NOT FOR NAVIGATIONSorry tide depth graphs only, please select another station.

Weather Map and Satellite Images
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Weather Map
IR Satellite Image from GEOS

GOES Local Image of Southeast    EDIT

Wind Forecast for Charleston, SC (19,4,5,8)
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Ground Weather Radar Station Charleston, SC
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weather_mapweather_map weather_map

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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 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 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.