Monday, July13, 2020
Privacy Policy
L-36.com


Marine Weather and Tides
St. Augustine South, 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 8:28PM Monday July 13, 2020 10:37 AM EDT (14:37 UTC) Moonrise 12:24AMMoonset 1:13PM Illumination 43% 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
    EDIT      (on/off)   Help
AMZ454 Expires:202007132200;;783926 Fzus52 Kjax 131356 Cwfjax Coastal Waters Forecast For Northeast Florida/southeast Georgia National Weather Service Jacksonville Fl 956 Am 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. Amz450-452-454-132200- 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- 956 Am Edt Mon Jul 13 2020
Rest of today..South winds 10 to 15 knots. Seas 2 to 3 feet. Dominant period 7 seconds. Inland waters a moderate chop. A chance of showers and Thunderstorms.
Tonight..Southwest winds 10 to 15 knots. Seas 2 to 3 feet. Dominant period 7 seconds. Inland waters a moderate 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 a slight chance of Thunderstorms.
Wednesday night..Southeast winds 5 to 10 knots. Seas 1 to 2 feet.
Thursday..East winds 10 to 15 knots. Seas 1 to 2 feet. A chance of showers and Thunderstorms.
Thursday night..East southeast winds 5 to 10 knots. Seas 1 to 2 feet. A slight chance of showers and Thunderstorms.
Friday..East winds 10 to 15 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- 956 Am Edt Mon Jul 13 2020
Synopsis.. A trough of low pressure over the region will lift back to the northwest today. The region will be between a trough to the northwest and high pressure to the southeast Tuesday. High pressure will build to the east northeast Wednesday into Thursday, as a trough sets up west of the local waters. High pressure will ridge across the region from the east northeast Friday through the weekend.
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 St. Augustine South CDP, FL
   Hourly   EDIT   Help
location: 29.87, -81.31     debug


Area Discussion for - Jacksonville, FL
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS62 KJAX 131413 AFDJAX

Area Forecast Discussion National Weather Service Jacksonville FL 1013 AM EDT Mon Jul 13 2020

UPDATE.

No change to forecast thinking for today. A few storms popping up along I-75 about 3 p.m. then moving east toward the east coast.

PREV DISCUSSION [703 AM EDT].

NEAR TERM [Through Tonight].

Unseasonably dry air mass over the region that shut down convection on Sunday will get replaced with increasing moisture Today as shortwave energy drops into the region from the West and is expected to trigger at least Scattered late morning and afternoon storms moving from West to East across the region. Mostly sunny skies with a few high clouds at times this morning will still be enough to drive Max Temps into the lower to middle 90s area-wide as southwest flow increases to 10-15 mph ahead of the approaching shortwave. The Southwest surface flow off the Gulf of Mexico will increase dewpoints back into the lower to middle 70s which combined with daytime heating will push Heat Indices into the 102-106 range by early this afternoon, just below Heat Advisory criteria. Slightly faster movement to storms from West to East this afternoon will allow for a better chance for gusty winds in addition to locally heavy rainfall in the strongest storms but organized severe weather is not expected. The Southwest flow will push the heat all the way to the Atlc Beaches as the East Coast sea breeze front remains pinned along the coast. Diurnal storms will fade by sunset with muggy overnight lows in the mid/upper 70s in the southwest flow which may also develop some overnight showers and isolated storms along the Big Bend Region of NE Gomex which may push inland to the I-75 corridor of inland NE FL during the overnight hours.

SHORT TERM [Tuesday Through Wednesday].

Southwesterly flow during midweek will result in easterly onshore winds by midweek, with the area of high pressure being situated off to the east and northeast. Diurnal convection with scattered to numerous showers and thunderstorms developing primarily across the center of the forecast area, aligning with the troughing above. Daily high temperatures during this period are expected to reach into the lower to mid 90s with peak heat index values ranging between 100 - 110 degrees. Overnight low temperatures are expected to be in the lower to mid 70s for midweek.

LONG TERM [Thursday Through Sunday].

High pressure ridge extending from out of the northeast will lead to the prevailing flow shifting about from out of the west to becoming more out of the east. This onshore flow will result in daily diurnal convection associated with the sea breeze pressing inland. Temperatures for the end of the week and into the weekend are expected to be slightly above the climatological average.

AVIATION. [Through 12Z Tuesday]

No change in thinking with respect to Aviation products. Mostly VFR conditions at all fields with convection developing near I-75 around 20 utc and moving toward the east coast through 02 utc. Right now widely scattered enough to only warrant VCTS in the TAFs and will look at possible TEMPOs with the 18 utc package.

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 95 74 95 75 96 / 30 10 40 10 50 SSI 92 78 92 78 91 / 30 10 30 10 20 JAX 96 76 95 75 95 / 40 10 60 10 40 SGJ 94 76 93 75 92 / 30 10 60 10 40 GNV 93 75 92 74 94 / 40 10 70 10 60 OCF 92 75 92 74 93 / 20 20 70 10 60

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


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
SAUF1 - St. Augustine, FL 3 mi37 min W 6 G 8 86°F 83°F1014 hPa (+0.8)75°F
41117 15 mi41 min 83°F3 ft
GTXF1 - Guana Tolomato Matanzas Reserve, FL 15 mi112 min SW 4.1 81°F 1015 hPa74°F
LTJF1 36 mi55 min 82°F 73°F
JXUF1 37 mi49 min 85°F
MYPF1 - 8720218 - Mayport (Bar Pilots Dock), FL 37 mi49 min W 7 G 8.9 82°F 86°F1013.5 hPa
BLIF1 38 mi49 min WSW 6 G 8
DMSF1 38 mi49 min 86°F
NFDF1 40 mi49 min WSW 4.1 G 7 80°F 80°F

Wind History for I-295 Bridge, St Johns River, FL
(wind in knots)    EDIT      (on/off)   Help
Last
24hr
1 day
ago
2 days
ago

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Northeast Florida Regional Airport, FL7 mi41 minSW 910.00 miPartly Cloudy85°F75°F72%1013.6 hPa

Link to 5 minute data for KSGJ

Wind History from SGJ (wind in knots)
11
AM
12
PM
1
PM
2
PM
3
PM
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
Last 24hrSW3W56W7SW6SE11SE9SE9SE12S9S7S5SW6SW4SW6W5SW4SW5W3S5SW5SW6W7SW9
1 day agoW43E9--SE10SE8SE9S8SE9S7SW3W10SW6W6SW6SW5SW4W7W7SW6SW9W5W5W5
2 days agoW6NW9NW7E9E9E9E9SE10SE13S8SW8SW6S7SW6SW5SW5W5W5CalmW5W5W6W6W7

Tide / Current Tables for State Road 312, Matanzas River, Florida
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Crescent Beach, Matanzas River, Florida
   EDIT      (on/off)   Help   One Week of Data
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Weather Map
       (on/off)   Help Weather Map
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 (10,2,3,4)
      (on/off)   Help

Ground Weather Radar Station Jacksonville, FL
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

Cookie Policy:
This website uses cookies to save your settings. No personal information is saved. I do not collect statistics on your visit. You can disable cookies in your browser if you like but it is not recommended for this site. I do not sell cookies. Go to a bakery for that. In fact I do not sell anything. To disable cookies from L-36.com, please refer to the Help button in your browser.
Privacy Policy:
I do not sell or share any user data or anything else for that matter. The only personal information I save is in the site log which has a line for each page view which includes the IP address your browser sends in the header as well as which page you requested. I use this to block hackers and other bad actors. I do not use this raw data to create profiles on users. I periodically delete the log files. If you are subject to CCPA, Google ads on this site will not be based on your past behavior so you will likely not see an ad for a lawn mower just because you looked for one at a big box website. I do not believe this site is subject to CCPA but I am doing what I can to follow the guidelines anyway.
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.