Monday, July13, 2020
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Marine Weather and Tides
Sawgrass, 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 6:32AMSunset 8:30PM Monday July 13, 2020 7:45 PM EDT (23:45 UTC) Moonrise 12:24AMMoonset 1:13PM Illumination 39% Phase: Third Quarter Moon; Moon at 23 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:202007140345;;796451 Fzus52 Kjax 131945 Cwfjax Coastal Waters Forecast For Northeast Florida/southeast Georgia National Weather Service Jacksonville Fl 345 Pm Edt Mon Jul 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. Amz450-452-454-140345- 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- 345 Pm Edt Mon Jul 13 2020
Tonight..West southwest winds 10 to 15 knots. Seas 2 to 3 feet. Dominant period 6 seconds. Inland waters a light chop.
Tuesday..Southwest winds 5 to 10 knots becoming south southeast in the afternoon. Seas 1 to 2 feet. Dominant period 8 seconds. Inland waters a light chop. A chance of showers and Thunderstorms.
Tuesday night..South southwest winds 5 to 10 knots becoming west southwest after midnight. Seas 1 to 2 feet. Dominant period 8 seconds. Inland waters a light chop.
Wednesday..Northwest winds around 5 knots becoming east southeast in the afternoon. Seas 1 to 2 feet. Dominant period 8 seconds. Inland waters smooth. A chance of showers and Thunderstorms.
Wednesday night..Southeast winds 5 to 10 knots. Seas 1 to 2 feet. Dominant period 8 seconds. Inland waters a light chop.
Thursday..East winds 10 to 15 knots. Seas 1 to 2 feet. Dominant period 8 seconds. Inland waters a light chop. A chance of showers and a slight chance of Thunderstorms.
Thursday night..East southeast winds 5 to 10 knots. Seas 1 to 2 feet.
Friday..East winds 10 to 15 knots. Seas 2 to 3 feet. A chance of showers and Thunderstorms.
Friday night and Saturday..East southeast winds 5 to 10 knots. Seas 2 to 3 feet. A chance of showers and Thunderstorms.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 345 Pm Edt Mon Jul 13 2020
Synopsis.. Drier air will limit rain chances today, then rain chances will increase by mid week with scattered to numerous afternoon and evening lightning storms expected Tuesday. Offshore winds are expected through Tuesday. Scattered showers and Thunderstorms are possible Wednesday through the weekend. Winds and waves could be locally higher in and around any showers and Thunderstorms. Winds veer out of the east to southeast Wednesday through the end of the week. Generally favorable conditions over the open waters with seas around 2 feet near the coast and up to 3-4 feet well offshore, with winds and seas locally higher near offshore moving storms on Tuesday.
Gulf stream.. The approximate location of the west wall of the gulf stream as of jul 11, 2020 at 1200 utc... 66 nautical miles east of flagler beach. 75 nautical miles east northeast of saint augustine beach. 80 nautical miles east of jacksonville beach. 91 nautical miles east southeast of st simons island. This data courtesy of the naval oceanographic office.


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


Area Discussion for - Jacksonville, FL
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FXUS62 KJAX 131928 AFDJAX

Area Forecast Discussion National Weather Service Jacksonville FL 328 PM EDT Mon Jul 13 2020

NEAR TERM [Through Tonight].

Convection is nil or near nil over the region this afternoon due to warm temperatures aloft (-6C at 500 mb). There is subtle hint of convergence along the First Coast late this afternoon with a surface trof right along the coast. This may bring a renegade pop- up shower or two late this afternoon with perhaps a clap or two of thunder. Otherwise, muggy conditions this evening into the overnight hours. Lows will be in the mid/upper 70s. The prevailing southwest flow which may develop some overnight showers and isolated storms over the NE GOM and the Big Bend Region of FL which may push inland to the I-75 corridor of inland NE FL toward sunrise.

SHORT TERM [Tuesday Through Wednesday Night].

Tuesday will be a similar set up as far as low-level flow pattern goes with a southwesterly flow with low level ridge axis near the FL Keys. Even more moisture recovery Tuesday will result in higher PoP coverage with the early morning showers coming in off the Gulf, transitioning to convective activity favoring interior counties by late morning and early afternoon, pressing toward the coastal FL and GA the remainder the day. Precipitable water values will climb into the 1.8 to 2.0 range for most of NE FL with PWATS about 1.6 to 1.8 over SE GA. Scattered to numerous showers are forecast for NE FL with mainly widely scattered coverage for SE GA.

On Wednesday, there will be a high pressure over coastal New England and another area of high pressure over the NE Gulf of Mexico. This pattern will bring lighter winds conducive for both the east coast and west coast seabreezes developing. With this said highest convective coverage will be across the interior counties between I-95 and I-75 with a collision of sea breezes likely to occur. PoPs 55-65% west of I-95. There is a potential for a few storms to become strong to marginally severe by mid to late afternoon into very early evening.

Daily high temperatures during this period are expected to reach into the lower to mid 90s with peak heat index values ranging between 100-108 degrees. Overnight low temperatures are expected to be in the mid 70s for midweek.

LONG TERM [Thursday Through Monday].

The western Atlantic ridge will be a further north with axis extending into south central GA while another area of high pressure will encompass Appalachian region. This pattern will bring a deep onshore flow pattern which will favor the east coast sea breeze development in the late morning to early afternoon, yielding diurnal convection across the interior and then pressing towards the western CWA during the mid to late afternoon through the early evening. Temperatures for the end of the week and into the weekend are expected to be slightly above the climatological average.

AVIATION. [Through 18Z Tuesday]

Mostly VFR conditions with most storms staying south of the Jacksonville Metro area fields. Believe the storms will be close to but just south of KGNV so for all of the fields north of KSGJ will keep the storms indicated as VCTS. For SGJ the storm trajectory looks like we should see storms in the St Augustine area later this afternoon so have a TEMPO group for thunderstorms

MARINE.

Trof axis down the SE US coastline will keep mainly offshore flow at 10-15 knots with seas 2-4 ft through mid-week with local onshore sea breezes along the coast. As the trof axis breaks down during the mid-week time frame, it will get replaced a weak High pressure ridge north of the waters and expect a more onshore east to southeast flow to develop by Thu/Fri time frame. No headlines.

Rip Currents: Low Risk of Rips continues in the offshore flow with surf/breakers in the 1-2 feet range through Tuesday.

PRELIMINARY POINT TEMPS/POPS.

AMG 74 97 75 96 74 / 10 30 10 50 20 SSI 78 93 78 91 79 / 10 30 10 20 10 JAX 76 96 76 96 76 / 10 60 10 40 20 SGJ 75 93 75 92 76 / 10 60 10 40 10 GNV 75 93 75 94 74 / 20 60 10 60 20 OCF 75 92 75 93 74 / 20 50 10 60 20

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
MYPF1 - 8720218 - Mayport (Bar Pilots Dock), FL 15 mi57 min 86°F
DMSF1 17 mi57 min 87°F
JXUF1 18 mi57 min 87°F
41117 20 mi19 min 85°F2 ft
SAUF1 - St. Augustine, FL 24 mi45 min SW 8 G 9.9 92°F 84°F1012.8 hPa (-0.0)72°F
FRDF1 - 8720030 - Fernandina Beach, FL 34 mi57 min 86°F
GTXF1 - Guana Tolomato Matanzas Reserve, FL 37 mi60 min SW 4.1 90°F 1014 hPa71°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 mi52 minW 1010.00 miPartly Cloudy94°F71°F48%1011.7 hPa
Mayport Naval Station - Adm David L. McDonald Field, FL14 mi53 minWSW 910.00 miPartly Cloudy93°F70°F47%1011.5 hPa
Northeast Florida Regional Airport, FL15 mi49 minSW 910.00 miFair90°F73°F59%1012.4 hPa
Jacksonville Naval Air Station, FL17 mi52 minW 1110.00 miPartly Cloudy95°F71°F46%1011.5 hPa

Link to 5 minute data for KCRG

Wind History from CRG (wind in knots)
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Last 24hrSE7SE7S3CalmSW8SW6SW6SW5SW3SW5CalmSW5SW7W8SW6W636W11S8W8SW10SW13W10
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2 days agoSE9S9S11SW7SW6SW7SW5W5W4NW4W4W7SW5W8W7N5N7N7N8S4SE5SE8SE9SE10

Tide / Current Tables for Palm Valley, ICWW, Florida
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Palm Valley
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Mon -- 01:24 AM EDT     Moonrise
Mon -- 05:06 AM EDT     1.35 feet High Tide
Mon -- 06:33 AM EDT     Sunrise
Mon -- 11:23 AM EDT     -2.08 feet Low Tide
Mon -- 02:13 PM EDT     Moonset
Mon -- 06:16 PM EDT     1.23 feet High Tide
Mon -- 08:28 PM EDT     Sunset
Mon -- 11:48 PM EDT     -1.64 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.2-0.30.40.91.31.41.30.90.3-0.4-1.3-2-1.9-1-0.20.40.81.11.21.10.70.1-0.5-1.3

Tide / Current Tables for St. Johns River Entrance, Florida Current
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St. Johns River Entrance
Click for Map
Mon -- 01:23 AM EDT     Moonrise
Mon -- 01:46 AM EDT     1.46 knots Max Flood
Mon -- 04:59 AM EDT     -0.00 knots Slack
Mon -- 06:32 AM EDT     Sunrise
Mon -- 07:53 AM EDT     -1.73 knots Max Ebb
Mon -- 11:42 AM EDT     0.00 knots Slack
Mon -- 02:12 PM EDT     1.89 knots Max Flood
Mon -- 02:13 PM EDT     Moonset
Mon -- 05:42 PM EDT     -0.00 knots Slack
Mon -- 08:28 PM EDT     -1.56 knots Max Ebb
Mon -- 08:29 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.51.31.41.10.7-0-0.9-1.6-1.7-1.6-1.4-0.70.31.41.91.71.30.6-0.3-1.2-1.5-1.5-1.4-1

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 (19,4,5,8)
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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.