Tuesday, January19, 2021
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Marine Weather and Tides
Sawgrass, FL

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 7:20AMSunset 5:52PM Tuesday January 19, 2021 12:23 PM EST (17:23 UTC) Moonrise 11:33AMMoonset 12:00AM Illumination 38% 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
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AMZ452 Expires:202101192215;;144561 Fzus52 Kjax 190658 Cwfjax Coastal Waters Forecast For Northeast Florida/southeast Georgia National Weather Service Jacksonville Fl 158 Am Est Tue Jan 19 2021 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. Amz450-452-454-192215- 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- 158 Am Est Tue Jan 19 2021
Today..Northeast winds 5 to 10 knots becoming east 5 knots late in the afternoon. Seas 1 to 2 feet with a dominant period 9 seconds. A light chop on the intracoastal waters.
Tonight..Southeast winds 5 knots becoming west 5 to 10 knots after midnight. Seas 1 to 2 feet with a dominant period 9 seconds. Mostly smooth on the intracoastal waters.
Wednesday..Northwest winds 5 to 10 knots. Seas 1 to 2 feet with a dominant period 9 seconds. A light chop on the intracoastal waters.
Wednesday night..Northwest winds 5 to 10 knots. Seas 1 to 2 feet. Mostly smooth on the intracoastal waters.
Thursday..Southwest winds 5 to 10 knots. Seas 1 to 2 feet. A light chop on the intracoastal waters.
Thursday night..Southwest winds 10 to 15 knots. Seas 2 to 3 feet. Chance of showers.
Friday..Southwest winds 10 to 15 knots. Seas 2 to 3 feet. Chance of showers.
Friday night..West winds 10 knots becoming northwest after midnight. Seas 2 to 3 feet. Chance of showers.
Saturday..Northeast winds 10 to 15 knots. Seas 2 to 3 feet. Slight chance of showers.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 158 Am Est Tue Jan 19 2021
Synopsis.. High pressure will be overhead today then shift toward the west tonight. A weak cold front will move into the area waters on Wednesday causing winds to shift to the northwest. The front will then move back north as a warm front Thursday causing winds to increase and shift to the southwest. A low pressure system will move east along the warm front Friday into Friday night, with the associated cold front moving south over area waters Friday night and Saturday morning. High pressure will build north of the region Saturday, and toward the northeast Sunday.
Gulf stream.. The approximate location of the west wall of the gulf stream as of jan 16, 2021 at 1200 utc... 58 nautical miles east of flagler beach. 63 nautical miles east of saint augustine beach. 71 nautical miles east of jacksonville beach. 92 nautical miles east southeast of st simons island. This data courtesy of the naval oceanographic office.


7 Day Forecast for Marine Location Near Sawgrass, FL
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location: 30.19, -81.36     debug


Area Discussion for - Jacksonville, FL
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FXUS62 KJAX 191041 AFDJAX

Area Forecast Discussion National Weather Service Jacksonville FL 541 AM EST Tue Jan 19 2021

AVIATION. [Through 12Z Wednesday]

VFR conditions, clear skies, and light and variable winds prevail through the period.

PREV DISCUSSION [258 AM EST].

NEAR TERM [Through Tonight].

Surface high pressure overhead will continue clear skies, dry conditions, and light winds today. The high will begin to shift southwest tonight as a weak front moves southeast into Georgia. This front will be moisture starved as it approaches the area bringing only an increase in cloud cover. Freezing and near freezing temperatures this morning rebound to near normal with highs warming into the 60s this afternoon. The slight increase in cloud cover tonight will limit radiational cooling causing overnight lows to be slightly below to near normal in the upper 30s to low 40s.

SHORT TERM [Wednesday Through Thursday].

As a sfc high pressure ridge over northeast FL moves southwest early Wed, the tail end of a weak cool front will pass through the area Wed as a mid/upper level trough moves offshore. The front will be accompanied by some clouds in the low and upper levels but forcing is too weak to support precip chances. Prevailing deep layer flow will be northwesterly as a mid level ridge is parked over the Gulf of Mexico. Highs in the mid 60s to lower 70s expected.

Wed night . Sfc high pressure will build in behind the weak cool front. Skies partly cloudy as mid/upper level clouds move in ahead of the series of shortwave troughs that push southeast over the Ohio Valley area and across the southern U.S. Despite upper level clouds, min temps still near seasonable norms around 40-45 deg. Can't rule out some brief stratus/light fog over inland northeast FL.

Thu . sfc high pressure ridge will shift south toward srn FL and the ern GOMEX with low level flow turning southwesterly. Strong mid/upper level disturbance over srn U.S. and embedded shortwave troughs over the TN valley, and southwest low level flow over the GOMEX will pump moisture northward to bring partly and mostly cloudy skies to the area. Models show PWATs reaching about 1.2 inches for the area. Given the initial dry air in place, most of the area will stay dry but may see some light showers/sprinkles push into inland southeast GA in the late aftn. Moderating temps expected on southwest flow with highs in the mid 60s over southeast GA, and near 70 over northeast FL.

Thu night . moisture will continue to gradually increase as shortwave energy shifts downstream and a cold front will move into the Carolinas and nrn GA. Warm advection pattern and isentropic lift will increase to support better chances of showers, with chance showers mainly north of I-10. Given the increase dewpoints, stratus and some fog possible over inland areas. Min temps expected to be above normal in the 50s.

LONG TERM [Friday Through Monday].

Shortwave energy north of the area weakens/shears out over the ern U.S. but sfc front and weak low pressure riding along the front will push southeast from north and central GA. Good moisture transport and sfc low along the front will drive rain chances up area wide with ~40-60 % POPs for southeast GA and chance POPs for northeast FL. Models still in fairly good agreement the cold front will still push through Friday evening and the overnight hours. Though upper level forcing is weak, high moisture associated with this front will support good chance of rain for nrn 2/3rds of the area. Instability looks very weak with poor lapse rates so will hold off mentioning isolated thunderstorms in fcst grids Fri aftn/night. Cold front expected to push just south of the area by Saturday morning with high pressure building north, then northeast of the area Saturday night and Sunday. This will allow low level flow to turn northeast and east. The next mid/upper level trough moves into the Four Corners region Sunday and then lifts quickly to the northeast on Monday. Warm advection and southwest low level flow may support isolated showers early next week over southeast GA. Temps on Friday will be near or above normal and trend to normal over the weekend, and moderate on Monday as flow transitions to south- southwest.

MARINE.

High pressure will be overhead today then shift toward the west tonight. A weak cold front will move into the area waters on Wednesday causing winds to shift to the northwest. The front will then move back north as a warm front Thursday causing winds to increase and shift to the southwest. A low pressure system will move east along the warm front Friday into Friday night, with the associated cold front moving south over area waters Friday night and Saturday morning. High pressure will build north of the region Saturday, and toward the northeast Sunday.

Rip Currents: Low risk of rip currents for NE FL and SE GA beaches today and tomorrow.

FIRE WEATHER.

For today, low aftn RH down into the mid 20s, and low daytime dispersion at or below 20 today as sfc high pressure dominates the area.

PRELIMINARY POINT TEMPS/POPS.

AMG 63 41 65 42 63 / 0 0 0 0 20 SSI 59 44 66 45 63 / 0 0 0 0 10 JAX 64 40 68 44 67 / 0 0 0 0 10 SGJ 62 43 68 46 68 / 0 0 0 0 10 GNV 66 38 69 43 69 / 0 0 0 0 10 OCF 68 39 70 44 70 / 0 0 0 0 10

JAX WATCHES/WARNINGS/ADVISORIES. FL . Frost Advisory until 9 AM EST this morning for Central Marion- Coastal Nassau-Eastern Marion-Inland Flagler-Inland St. Johns-Putnam.

Freeze Warning until 9 AM EST this morning for Bradford-Clay- Eastern Alachua-Inland Duval-Inland Nassau-Western Alachua- Western Marion.

GA . None. AM . None.


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LTJF1 14 mi54 min 55°F 41°F
MYPF1 - 8720218 - Mayport (Bar Pilots Dock), FL 15 mi54 min NE 7 G 8.9 54°F 57°F1030.4 hPa
BLIF1 16 mi54 min ESE 5.1 G 6 59°F 1031.1 hPa40°F
DMSF1 17 mi54 min 55°F
JXUF1 18 mi54 min 56°F
41117 20 mi58 min 60°F1 ft
NFDF1 20 mi60 min E 5.1 G 6 57°F 1030.1 hPa
SAUF1 - St. Augustine, FL 24 mi84 min NNE 8 G 8.9 58°F 57°F1030.2 hPa (+2.5)39°F
FRDF1 - 8720030 - Fernandina Beach, FL 34 mi54 min NNW 1.9 G 4.1 57°F 55°F1030.1 hPa
41112 - Offshore Fernandina Beach, FL (132) 36 mi54 min 54°F 58°F1 ft
GTXF1 - Guana Tolomato Matanzas Reserve, FL 37 mi99 min NNE 4.1 60°F 1030 hPa42°F

Wind History for I-295 Bridge, St Johns River, FL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Jacksonville Craig Municipal Airport, FL13 mi31 minE 610.00 miFair62°F31°F31%1029.7 hPa
Mayport Naval Station - Adm David L. McDonald Field, FL14 mi32 minNE 710.00 miFair60°F45°F58%1029.8 hPa
Northeast Florida Regional Airport, FL15 mi28 minN 910.00 miFair59°F44°F58%1029.9 hPa
Jacksonville Naval Air Station, FL17 mi31 minNNW 510.00 miFair59°F29°F32%1029.5 hPa

Link to 5 minute data for KCRG

Wind History from CRG (wind in knots)
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Last 24hrW10W9W10W7NW7NW4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNW5NE7E6
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W8W8W7W3CalmCalmCalmW8W7W6W5SW4SW4W4SW6W6W6W8NW11NW10NW9N9
2 days agoW13
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W6W4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNW4CalmCalmW6

Tide / Current Tables for Palm Valley, ICWW, Florida
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Palm Valley
Click for Map
Tue -- 03:01 AM EST     1.31 feet High Tide
Tue -- 07:21 AM EST     Sunrise
Tue -- 08:43 AM EST     -2.01 feet Low Tide
Tue -- 11:32 AM EST     Moonrise
Tue -- 03:10 PM EST     1.63 feet High Tide
Tue -- 05:51 PM EST     Sunset
Tue -- 09:12 PM EST     -2.16 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.30.81.21.31.10.6-0.1-0.9-1.7-2-1.2-0.20.51.11.51.61.510.3-0.5-1.5-2.1-1.8-0.9

Tide / Current Tables for St. Johns River Entrance, Florida Current
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St. Johns River Entrance
Click for Map
Tue -- 02:46 AM EST     -0.00 knots Slack
Tue -- 05:31 AM EST     -1.59 knots Max Ebb
Tue -- 07:22 AM EST     Sunrise
Tue -- 09:27 AM EST     0.00 knots Slack
Tue -- 11:32 AM EST     Moonrise
Tue -- 11:49 AM EST     1.54 knots Max Flood
Tue -- 02:57 PM EST     -0.00 knots Slack
Tue -- 05:50 PM EST     Sunset
Tue -- 05:52 PM EST     -1.75 knots Max Ebb
Tue -- 09:42 PM EST     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.81.50.8-0.2-1.2-1.6-1.6-1.5-1.1-0.40.51.31.51.30.8-0-1-1.6-1.7-1.7-1.4-0.70.31.4

Weather Map
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wmap_A
GEOS Local Image of    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.
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Ground Weather Radar Station




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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 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.