Thursday, August13, 2020
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Marine Weather and Tides
Marineland, FL

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 6:50AMSunset 8:08PM Thursday August 13, 2020 5:44 AM EDT (09:44 UTC) Moonrise 12:36AMMoonset 2:42PM Illumination 30% Phase: Waning Crescent; Moon at 24 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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AMZ454 Expires:202008132115;;371900 Fzus52 Kjax 130621 Cwfjax Coastal Waters Forecast For Northeast Florida/southeast Georgia National Weather Service Jacksonville Fl 221 Am Edt Thu Aug 13 2020 Atlantic Coastal Waters From Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm. Seas Are Provided As A Range Of The Average Height Of The Highest 1/3 Of The Waves, Along With The Occasional Height Of The Average Highest 1/10 Of The Waves. Amz450-452-454-132115- 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- 221 Am Edt Thu Aug 13 2020
Today..Southwest winds 5 to 10 knots becoming south 10 to 15 knots in the afternoon. Seas 2 to 3 feet with a dominant period 4 seconds. A moderate chop on the intracoastal waters. Slight chance of showers in the morning. Slight chance of Thunderstorms. Chance of showers in the afternoon.
Tonight..Southwest winds 10 to 15 knots. Seas 2 to 3 feet with a dominant period 4 seconds. A light chop on the intracoastal waters. Chance of showers in the evening. Slight chance of Thunderstorms. Slight chance of showers after midnight.
Friday..Southwest winds 5 to 10 knots becoming south in the afternoon. Seas 2 to 3 feet with a dominant period 5 seconds. A light chop on the intracoastal waters. Chance of showers and slight chance of Thunderstorms.
Friday night..South winds 10 to 15 knots becoming southwest 5 to 10 knots after midnight. Seas 2 to 3 feet. A light chop on the intracoastal waters. Chance of showers and slight chance of Thunderstorms in the evening, then slight chance of showers after midnight.
Saturday..Southwest winds 5 to 10 knots becoming south in the afternoon. Seas 2 to 3 feet. A light chop on the intracoastal waters. Slight chance of showers and Thunderstorms in the morning, then showers likely and chance of Thunderstorms in the afternoon.
Saturday night..Southwest winds 5 to 10 knots. Seas 2 to 3 feet. Chance of showers and slight chance of Thunderstorms.
Sunday..Southwest winds 5 to 10 knots. Seas 2 to 3 feet. Chance of showers and Thunderstorms.
Sunday night..Southwest winds 5 to 10 knots. Seas 2 to 3 feet. Chance of showers and Thunderstorms.
Monday..South winds 5 to 10 knots. Seas 2 to 3 feet. Chance of showers and Thunderstorms.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 221 Am Edt Thu Aug 13 2020
Synopsis.. The region will be between high pressure to the east southeast and a trough of low pressure to the northwest through Saturday. A cold front will move into the southeastern us to around the ga and fl line Sunday, and linger near there into early next week.
Gulf stream.. The approximate location of the west wall of the gulf stream as of aug 13, 2020 at 1200 utc... 65 nautical miles east northeast of flagler beach. 72 nautical miles east of saint augustine beach. 85 nautical miles east southeast of jacksonville beach. 102 nautical miles east southeast of st simons island. This data courtesy of the naval oceanographic office.


7 Day Forecast for Marine Location Near Marineland, FL
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location: 29.63, -81.21     debug


Area Discussion for - Jacksonville, FL
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FXUS62 KJAX 130625 AFDJAX

Area Forecast Discussion National Weather Service Jacksonville FL 225 AM EDT Thu Aug 13 2020

NEAR TERM [Through Tonight].

The region will be in an area of light upper level winds today due to an upper trough over the Mississippi and Tennessee Valleys and an upper ridge to the southeast. In the low to mid levels, high pressure will be centered near Bermuda, with the ridge axis extending across central Florida. The low level southwesterly flow will strengthen through the day as the ridging slides slowly northward. The very deep tropical moisture over the area will get jettisoned to the northeast before daybreak on Friday. Precipitable water values will fall from 2.0-2.2 inches today to 1.7-1.95 inches overnight. Scattered showers and storms are forecast to develop along the Gulf coast sea breeze in the early afternoon and push inland, meeting the east coast sea breeze in the late afternoon just west of I-95. Overall storm motion will be very slow, dictated mainly by the sea breeze and outflow boundaries. Locally heavy rainfall and gusty winds from wet microbursts are the main threats from storms. Highs will be in the lower 90s.

Convection will gradually dissipate during the evening hours. Predawn convection may increase in coverage over the northeast Gulf of Mexico and along the Nature Coast on Friday morning, with scattered coverage possibly moving into southern portions of the Suwannee Valley towards sunrise. Lows will be in the 70s.

SHORT TERM [Friday Through Saturday].

A low pressure system will develop as an upper level shortwave digs into the OH Valley Friday, with a surface frontal boundary developing across NC/TN. The low will continue to deepen as it pushes further SE into the TN Valley on Saturday, shifting the surface frontal boundary further S into W GA/SE AL, possibly reaching SE GA late Saturday Night. Ahead of the front, the area will continue to experience warm, muggy summertime conditions with enough moisture, heat and instability to get seabreeze storms going in the afternoon/evening with just a smidge more forcing from outflow from storms to our northwest along the front. This extra lift will likely lead to higher coverage over inland SE GA both Friday and Saturday. Moisture available will be a little lower than we've seen the last several days, hovering around 1.7-2.1", but will still be enough for some storms to produce heavy rainfall. With grounds already saturated in many spots from recent heavy rainfall, isolated flooding will be possible.

LONG TERM [Sunday Through Thursday].

The aforementioned front is forecast to move into SE GA on Sunday night and into NE FL Monday-Monday night. Behind the front, drier air will infiltrate the area, although only briefly. With a deep trough setting up over the eastern CONUS Tuesday through the remainder of the week, deep layer southwesterly flow will quickly bring a return of rich Gulf moisture to the region, setting us up for an active seabreeze pattern once again. Temperatures will be near to ever so slightly below normal, peaking in the upper 80s to low 90s in the afternoon and dipping into the low-mid 70s at night.

AVIATION. [Through 06Z Friday]

VFR conditions with light winds will prevail the rest of the night. Light southwest winds 5-10 knots will prevail on Thursday, with the east coast sea breeze pushing inland in the afternoon. Scattered to numerous showers and storms will develop and along the Gulf coast sea breeze in the early to mid afternoon, and push towards the east coast in the mid to late afternoon hours. Showers/storms will diminish in the evening with light winds and VFR conditions overnight.

MARINE.

A trough will remain situated just west of our GA waters through the weekend, keeping the axis of weak Atlantic ridging positioned across central FL, resulting in prevailing south-southwesterly winds during the next several days. Showers and thunderstorms will develop each afternoon over land and may impact the near shore waters during the late afternoon and evening hours, with scattered activity possible offshore during the overnight hours. The Atlantic sea breeze will develop each afternoon, with winds becoming onshore over the near shore waters, followed by southerly evening wind surges. Seas of 2-4 feet will prevail both near shore and offshore through early next week. Coverage of showers and thunderstorms may increase early next week as a frontal boundary stalls just to the west of the GA waters.

Rip Currents: SE GA: Low risk through Friday NE FL: Moderate risk through Friday

FIRE WEATHER.

Weak winds aloft will continue today and tomorrow, keeping daytime dispersions low. Winds will increase Saturday as a low pressure system pushes into SE GA. Daily afternoon and evening showers and thunderstorms will bring periods of heavy rain, lightning, and occasional damaging wind gusts to the region. Fog will be possible in the mornings, especially in areas that received rainfall.

PRELIMINARY POINT TEMPS/POPS.

AMG 91 73 91 73 90 / 70 30 80 30 80 SSI 90 77 91 77 91 / 50 40 60 40 70 JAX 94 75 94 75 94 / 70 30 70 20 80 SGJ 92 75 92 75 91 / 70 30 60 20 70 GNV 92 73 93 74 91 / 60 20 70 20 70 OCF 91 73 92 74 91 / 60 20 70 20 70

JAX WATCHES/WARNINGS/ADVISORIES. FL . None. GA . None. AM . None.


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
GTXF1 - Guana Tolomato Matanzas Reserve, FL 2 mi60 min SW 1 75°F 1018 hPa74°F
SAUF1 - St. Augustine, FL 16 mi45 min SW 5.1 G 5.1 77°F 84°F1016.6 hPa (-0.5)75°F
41117 26 mi49 min 84°F2 ft

Wind History for I-295 Bridge, St Johns River, FL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Northeast Florida Regional Airport, FL24 mi49 minW 610.00 miPartly Cloudy76°F73°F94%1016.5 hPa

Link to 5 minute data for KSGJ

Wind History from SGJ (wind in knots)
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Last 24hrW5W3W3W6W5CalmW64E10E10SE13SE11SE10W8W4SW3CalmS3S4SW4SW5SW5W4W6
1 day agoSW5SW4SW4SW4SW6SW5SW5SW5W3E6SE11W7S5SW5W6SW6CalmS4SW4NW3CalmCalmSW4SW3
2 days agoCalmW3W4W6W6NW4N4E8E8E9E10SE11SE11SE11S5W3W8
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Tide / Current Tables for Bings Landing, Matanzas River, Florida
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Fort Matanzas, Matanzas River, ICWW, Florida
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Weather Map
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wmap_A
GEOS Local Image of Southeast    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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Jacksonville, FL (5,6,7,8)
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Ground Weather Radar Station Jacksonville, FL
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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 numerous 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.