Monday, April24, 2017 L-36.com


Marine Weather and Tides
St. Simons, 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 6:45AMSunset 8:02PM Monday April 24, 2017 9:25 AM EDT (13:25 UTC) Moonrise 4:41AMMoonset 5:10PM Illumination 3% Phase: Waning Crescent; Moon at 28 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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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- 252 Am Edt Mon Apr 24 2017
Today..Southwest winds 10 to 15 knots shifting the west this morning. Seas 3 to 5 feet. Dominant period 6 seconds. Inland waters a light chop. A chance of showers in the morning.
Tonight..West winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Inland waters a light chop.
Tuesday..West winds 15 to 20 knots becoming west southwest 5 to 10 knots in the evening. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Inland waters choppy.
Tuesday night..West southwest winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 9 seconds. Inland waters a light chop.
Wednesday..West southwest winds 5 to 10 knots becoming southeast 10 to 15 knots in the afternoon. Seas 2 to 4 feet. Inland waters a light chop.
Wednesday night..South winds 15 to 20 knots becoming southwest 10 to 15 knots after midnight. Seas 3 to 5 feet with occasional seas up to 6 feet. Inland waters a moderate chop.
Thursday..South winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Inland waters choppy.
Thursday night..South winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Inland waters a moderate chop. A slight chance of showers.
Friday..South southeast winds 10 to 15 knots. Seas 2 to 4 feet. Inland waters a light chop.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 252 Am Edt Mon Apr 24 2017
Synopsis.. A cold front will cross area waters this morning. Low pressure is expected to track north of the region Monday...then track northeast away from the local waters Tuesday. High pressure will build across south florida Wednesday and southeast of the region through the end of the week.

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


Area Discussion for - Jacksonville, FL
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Fxus62 kjax 240655
afdjax
area forecast discussion
national weather service jacksonville fl
255 am edt Mon apr 24 2017

Short term Today and tonight... Upper low over N al will move
ese across central ga today and into sc tonight. Very dry air
rotating around low has resulted in just isolated showers over ne
fl/se ga early this morning. Cold front now entering western
zones will move east across the area this morning shifting sw
winds to the west and ending the chance of showers by late
morning. Cooler and drier air will advect into the area today with
cooler temperatures... Reaching the 75 to 80 degree range with
lower humidity. Tonight temperatures will drop into the 50s. With
westerly winds today and wnw winds tonight smoke from the
okefenokee swamp wildfire will likely move across parts of
charlton... Nassau and duval counties.

Tue/wed... Stacked low pressure system over the carolinas will
continue to move NE away from the region with high pressure ridge
slowly building northward up the florida peninsula in its wake. The
near breezy westerly flow on Tuesday will keep the atlc coast sea
breeze pinned at the coast and expect mostly sunny skies and highs
generally in the lower/middle 80s all areas. Weaker steering flow on
Wednesday will allow for both gulf/atlc coast sea breezes to move
inland but atmosphere too dry to support and precipitation and max
temps under mostly skies will push well into the upper 80s inland
and lower 80s at the coast.

Long term /thu-sun/
Thu-fri... Both gfs/ecmwf supporting above normal temps with s/sw
steering flow pushing MAX temps into the lower 90s inland and 80s at
the coast, with a weakening shortwave aloft pushing across the SE us
late Thu and into NE fl/se ga Thu night and washing it out on
Friday. Still too far out but there might be enough moisture to
support some isolated showers/storms mainly during the afternoon and
evening hours on both days but overall not a significant pcpn event
expected.

Sat/sun... Summer-like bermuda high pressure ridge builds over the
region at the surface and aloft and expect well above normal temps
to continue with highs into the lower 90s inland and 80s at the
coast but lack of moisture and high pressure aloft will suppress any
diurnal convection and mainly hot/dry conditions will prevail.

Aviation MostlyVFR ceilings this morning with isolated showers
possible as cold front pushes through the area early this morning.

Tempo MVFR CIGS possible around 1500 feet til around 13z near
frontal boundary. SW winds will shift to the W with frontal
passage.

Marine Sw winds will shift to the west this morning as a cold
front moves across the waters. Scec headline possible for tonight
and Tuesday as winds increase due to deepening surface low off the
carolina coast. After a brief lull... South winds will increase to
scec levels Wednesday night through Thursday night as the pressure
gradient tightens between building high to the east and low
pressure to the west.

Rip currents: low risk today and Tuesday as winds become offshore.

Fire weather
Lack of much significant rainfall with this system didn't help the
wildfire situation much and westerly winds at 10-15g20 mph today and
Tuesday will enhance fire danger despite rh's remaining above
critical levels although the winds will produce pockets of elevated
dispersions this afternoon and again Tuesday afternoon.

Also, the smoke from the wildfire will head towards the east behind
the frontal passage today and will likely impact at least the
northern portions of the jax metro area with the smell of smoke
today and possibly some visibility restrictions tonight.

Preliminary point temps/pops
Amg 74 56 83 60 / 20 0 0 0
ssi 76 60 79 66 / 30 0 0 0
jax 79 57 84 62 / 20 0 0 0
sgj 79 57 82 63 / 10 0 0 0
gnv 78 53 84 58 / 10 0 0 0
ocf 79 55 83 59 / 0 0 0 0

Jax watches/warnings/advisories
Fl... None.

Ga... None.

Am... None.

Zibura/hess


Weather Reporting Stations
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Wind History for Fernandina Beach, FL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Brunswick, Malcolm McKinnon Airport, GA1 mi32 minW 1110.00 miOvercast67°F62°F84%1005.7 hPa
Brunswick / Glynco, GA10 mi30 minW 7 G 1410.00 miOvercast66°F62°F88%1006.4 hPa

Wind History from BQK (wind in knots)
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Last 24hrS5SW6SE8S5SE11
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1 day agoSW12
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CalmSE9SE10SE12
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S10SE9SE9S6S8S7S3S5S4S4S4CalmSW4SW3CalmSW3
2 days agoSW10W7S6W3SE10
G14
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SE11SE10S11SE9SE7S7S5S8S6S6S4S6S6S5S4S7SW8

Tide / Current Tables for St. Simons Lighthouse, St. Simons Island, Georgia
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St. Simons Lighthouse
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Mon -- 01:12 AM EDT     -0.03 feet Low Tide
Mon -- 05:41 AM EDT     Moonrise
Mon -- 06:47 AM EDT     Sunrise
Mon -- 07:09 AM EDT     7.20 feet High Tide
Mon -- 01:35 PM EDT     -0.45 feet Low Tide
Mon -- 06:10 PM EDT     Moonset
Mon -- 07:32 PM EDT     7.92 feet High Tide
Mon -- 08:00 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.6-00.31.53.35.26.67.26.95.84.12.30.7-0.3-0.40.62.54.86.77.87.86.95.33.4

Tide / Current Tables for Mackay River (Daymark #239), Georgia
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Mackay River (Daymark #239)
Click for Map
Mon -- 01:55 AM EDT     -0.15 feet Low Tide
Mon -- 05:41 AM EDT     Moonrise
Mon -- 06:47 AM EDT     Sunrise
Mon -- 08:00 AM EDT     7.72 feet High Tide
Mon -- 02:18 PM EDT     -0.61 feet Low Tide
Mon -- 06:10 PM EDT     Moonset
Mon -- 08:00 PM EDT     Sunset
Mon -- 08:20 PM EDT     8.51 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.70.3-0.10.52.14.167.37.77.364.22.20.4-0.5-0.31.23.55.87.58.48.37.25.4

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

GOES Local Image of Southeast    EDIT
Geos

Wind Forecast for Jacksonville, FL (9,2,3,4)
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Ground Weather Radar Station Jacksonville, FL
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weather_mapweather_map weather_map

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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.