Tuesday, September26, 2017 L-36.com


Marine Weather and Tides
St. Simons, 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 7:16AMSunset 7:17PM Tuesday September 26, 2017 4:09 PM EDT (20:09 UTC) Moonrise 12:01PMMoonset 10:46PM Illumination 36% Phase: Waxing Crescent; Moon at 6 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
AMZ450 Coastal Waters From Altamaha Sound To Fernandina Beach Fl Out 20 Nm- Coastal Waters From Fernandina Beach To St. Augustine Fl Out 20 Nm- Coastal Waters From St. Augustine To Flagler Beach Fl Out 20 Nm- 349 Pm Edt Tue Sep 26 2017
Tonight..South southeast winds around 5 knots becoming west late in the evening. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 12 seconds. Inland waters smooth.
Wednesday..Northwest winds 5 to 10 knots becoming east southeast in the evening. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 12 seconds. Inland waters a light chop.
Wednesday night..West southwest winds 5 to 10 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. Inland waters a light chop.
Thursday..West northwest winds 5 to 10 knots becoming north northwest in the morning, then becoming east southeast in the afternoon. Seas 2 to 3 feet. Dominant period 11 seconds. Inland waters smooth.
Thursday night..South winds 5 to 10 knots becoming southwest after midnight. Seas 2 to 4 feet. Inland waters smooth.
Friday..South southwest winds around 5 knots becoming east southeast in the afternoon. Seas 2 to 4 feet. Inland waters smooth. A slight chance of showers and isolated Thunderstorms.
Friday night..East southeast winds 5 to 10 knots. Seas 2 to 4 feet. Inland waters a light chop. A chance of showers and isolated Thunderstorms.
Saturday..Northeast winds 15 to 20 knots. Seas 2 to 4 feet building to 4 to 6 feet with occasional seas up to 8 feet in the afternoon. Inland waters a moderate chop. A chance of showers and isolated Thunderstorms.
Saturday night and Sunday..East northeast winds 20 to 25 knots with gusts to around 35 knots. Seas 6 to 9 feet with occasional seas up to 11 feet. Inland waters rough. A chance of showers and isolated Thunderstorms.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 349 Pm Edt Tue Sep 26 2017
Synopsis..Elevated seas continue as hurricane maria moves to the northeast of the region. Winds will be light through Friday and then increase from the northeast on Saturday as strong high pressure builds to the north.

7 Day Forecast for Marine Location Near St. Simons, GA
   Hourly   EDIT   Help
location: 31.13, -81.39     debug


Area Discussion for - Jacksonville, FL
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus62 kjax 262000
afdjax
area forecast discussion
national weather service jacksonville fl
400 pm edt Tue sep 26 2017

Near term (tonight and Wednesday)...

meanwhile, weak upper ridging will persist from western gulf of
mexico into the mid atlantic states. Also a weak upper low will be
centered over the northeast gom, and maria will continue to lift
north then east off the mid atlantic coast into the north atlantic
maritime waters. NE fl and SE ga will remain between surface high
pressure to the northwest, and departing low pressure to the
northeast. The result will be drier air continuing to filter into
the region with light n-nw winds. With very weak gradient flow, the
seabreeze will pronounced the rest of this afternoon and Wednesday
afternoon, with NE winds near the immediate coast. With lacking
moisture, showers will confined over north central fl with 5 to 10
percent chances over NE fl. Expect dry conditions with overnight
lows upper 60s inland to lower 70s coast, st. Johns river and
intercoastal. Highs will reach the lower 90s inland and and upper
80s along the coast.

Short term Wednesday night-Thursday night
Weak pressure pattern over the area along with dry and warm air
aloft will lead to a continuation of mostly clear skies at night and
partly to mostly sunny skies in the afternoon. Hot afternoon temps
in the lower to mid 90s inland and near 90 along the coast.

Long term Friday-Tuesday
Nor'easter conditions expected to develop especially by this weekend
and into early next week as a cold front stalls south of the area
and a strong deep layer ridge builds across the northeast u.S. The
12z ECMWF has come in much wetter than the 12z GFS in that it has a
mid upper low meandering just offshore the fl east coast which... If
verifies... Could bring prolonged periods of rain especially near and
along the coast. Until there is better model consistency... Have gone
with high end scattered pops along the NE fl coast with lower rain
chances especially across inland SE ga. Temps will cool to slightly
below normal across most areas except for across inland areas of n
cntl fl where afternoon temps will be near normal.

Aviation Vfr conditions will continue throughout the afternoon
and evening with northwesterly winds decreasing to near calm during
the overnight hours. ExpectVFR conditions tomorrow morning with
light northwesterly winds slowly increasing into the afternoon.

Marine Advisory for seas will continue offshore into Wednesday
as swells from maria keep combined sea heights elevated. Winds will
be light at near 10 knots through Friday as the pressure gradient
remains weak. Northeast winds will increase Saturday as models show
strong high pressure building over new england and weak low pressure
forming near the bahamas. Advisories will be likely again this
weekend.

Rip currents: high rip current risk through this evening due to long
period swells. Moderate risk on Wednesday as swells decrease.

Fire weather a brief period of lower afternoon humidities of 40
to 50 percent will exist through Thursday, as slightly drier air
filters into the region due to light northerly winds. Gradual
moistening will occur from Friday with increasing rain chances with
a nor'easterly flow developing. Given humidities will remain well
above critical levels, no fire weather concerns are expected.

Hydrology Coastal flood advisory extended through at least
Wednesday for most of the st. Johns river basin as river gauges
still show minor to moderate flooding is still occurring at times of
high tide.

Moderate flooding continues along portions of the santa fe river.

Minor flooding still occurring on the st. Marys river and on the
satilla river east of waycross.

Preliminary point temps pops
Amg 68 92 70 93 0 10 0 10
ssi 72 89 75 90 0 10 0 10
jax 70 92 72 92 0 10 0 10
sgj 71 89 73 90 0 0 0 10
gnv 68 92 70 94 0 0 0 10
ocf 69 92 70 93 10 0 0 10

Jax watches warnings advisories
Fl... High rip current risk until 8 pm edt this evening for coastal
duval-coastal nassau-flagler-st. Johns.

Coastal flood advisory until 8 pm edt Wednesday for clay-coastal
duval-flagler-inland duval-putnam-st. Johns.

Ga... None.

Am... Small craft advisory until 10 am edt Wednesday for waters from
altamaha sound ga to fernandina beach fl from 20 to 60 nm-
waters from fernandina beach to st. Augustine fl from 20 to
60 nm-waters from st. Augustine to flagler beach fl from 20
to 60 nm.

Sc pp nm


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
SAXG1 - Sapelo Island Reserve, GA 21 mi70 min Calm 89°F 1011 hPa (-2.0)70°F
41112 - Offshore Fernandina Beach, FL (132) 30 mi70 min 82°F3 ft
FRDF1 - 8720030 - Fernandina Beach, FL 32 mi52 min ENE 1.9 G 7 86°F 82°F1012 hPa
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 33 mi80 min W 5.8 G 7.8 81°F 81°F4 ft1011.1 hPa (-1.6)70°F

Wind History for Fernandina Beach, FL
(wind in knots)    EDIT      (on/off)   Help
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
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
Last
24hr
NE5
G12
NE5
G9
NE4
G8
NE1
G6
E2
NE2
NE2
G5
NE1
E1
--
NE1
W4
W3
W3
NW2
G5
W3
W5
NW3
G7
NW4
G8
NW3
G7
NW5
G8
N5
G8
NW2
G5
E4
G7
1 day
ago
NE9
G13
N10
G14
NE6
G13
NE8
G14
NE7
G15
NE4
G10
NE5
G12
NE8
G13
N7
G11
NE6
G10
N3
G8
N4
G9
NW4
G8
NW3
G6
NW3
G8
NW3
NW3
NW5
N5
N5
G9
N6
N3
G6
NE3
G8
NE5
G9
2 days
ago
NE5
G11
NE4
G16
NE7
G15
NE6
G11
NE3
G9
NE5
G10
NE3
G10
NE7
G10
NE4
G9
NE4
G9
NE4
G7
NE3
G8
NE3
G8
NE3
G6
NE6
G12
NE4
G7
NE5
G9
N6
G10
NE9
G15
NE9
G14
N8
G16
NE7
G16
NE11
G17
NE5
G12

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Brunswick, Malcolm McKinnon Airport, GA1 mi17 minSE 710.00 miFair85°F73°F68%1011.2 hPa
Brunswick / Glynco, GA10 mi15 minNNE 610.00 miMostly Cloudy88°F66°F49%1011.2 hPa

Wind History from BQK (wind in knots)
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
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
Last 24hrNE8NE7NE7E6E3CalmCalmCalmCalmCalmCalmW3CalmCalmNW3W3NW4NW5NW4NW5N6NW5NW6W5
1 day agoE11NE12NE12
G17
NE9NE4NE3NE3N3CalmCalmCalmCalmN4CalmCalmCalmN4N5N5N8CalmNW6N5E8
2 days agoNE15
G19
NE10NE13
G17
NE10
G16
NE7NE5NE5NE3NE5NE6NE5N3CalmCalmN3N4N5N5N9
G14
NE7
G14
NE9NE9NE10
G15
NE15

Tide / Current Tables for St. Simons Lighthouse, St. Simons Island, Georgia
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
St. Simons Lighthouse
Click for Map
Tue -- 01:01 AM EDT     6.62 feet High Tide
Tue -- 06:56 AM EDT     1.47 feet Low Tide
Tue -- 07:16 AM EDT     Sunrise
Tue -- 01:00 PM EDT     Moonrise
Tue -- 01:27 PM EDT     7.02 feet High Tide
Tue -- 07:16 PM EDT     Sunset
Tue -- 07:50 PM EDT     1.86 feet Low Tide
Tue -- 11:46 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.36.66.35.33.92.61.71.51.82.745.36.476.96.35.13.82.721.92.23.14.3

Tide / Current Tables for Mackay River (Daymark #239), Georgia
   EDIT      (on/off)   Help   One Week of Data
Mackay River (Daymark #239)
Click for Map
Tue -- 01:40 AM EDT     6.87 feet High Tide
Tue -- 07:16 AM EDT     Sunrise
Tue -- 07:38 AM EDT     1.29 feet Low Tide
Tue -- 01:00 PM EDT     Moonrise
Tue -- 02:14 PM EDT     7.23 feet High Tide
Tue -- 07:16 PM EDT     Sunset
Tue -- 08:23 PM EDT     1.73 feet Low Tide
Tue -- 11:46 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
66.76.86.25.13.62.31.51.42.13.34.75.96.87.276.253.72.51.81.92.63.8

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 Jacksonville, FL (16,3,4,5)
      (on/off)   Help

Ground Weather Radar Station Jacksonville, FL
   (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.