Friday, August7, 2020
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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 6:47AMSunset 8:13PM Friday August 7, 2020 8:02 AM EDT (12:02 UTC) Moonrise 9:55PMMoonset 9:19AM Illumination 87% Phase: Waning Gibbous; Moon at 18 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:202008071600;;059364 Fzus52 Kjax 070723 Cwfjax Coastal Waters Forecast For Northeast Florida/southeast Georgia National Weather Service Jacksonville Fl 323 Am Edt Fri Aug 7 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. Amz450-452-454-071600- 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- 323 Am Edt Fri Aug 7 2020
Today..Southwest winds 5 knots becoming southeast 5 to 10 knots in the afternoon. Seas 2 to 3 feet with a dominant period 8 seconds. A light chop on the intracoastal waters. Slight chance of showers and Thunderstorms.
Tonight..South winds 5 to 10 knots. Seas 2 to 3 feet with a dominant period 8 seconds. Mostly smooth on the intracoastal waters. Slight chance of showers and Thunderstorms in the evening.
Saturday..Southwest winds 5 knots becoming southeast 5 to 10 knots in the afternoon. Seas 1 to 2 feet with a dominant period 9 seconds. A light chop on the intracoastal waters. Slight chance of showers and Thunderstorms in the morning, then chance of showers and Thunderstorms in the afternoon.
Saturday night..South winds 5 to 10 knots becoming southwest after midnight. Seas 2 to 3 feet. Mostly smooth on the intracoastal waters. Slight chance of showers and Thunderstorms.
Sunday..Southwest winds 5 knots becoming southeast 5 to 10 knots in the afternoon. Seas 1 to 2 feet. A light chop on the intracoastal waters. Slight chance of showers and Thunderstorms in the morning, then chance of showers and Thunderstorms in the afternoon.
Sunday night..South winds 5 to 10 knots becoming southwest after midnight. Seas 1 to 2 feet. Slight chance of showers and Thunderstorms.
Monday..South winds 5 to 10 knots becoming southeast in the afternoon. Seas 1 to 2 feet. Chance of showers and Thunderstorms.
Monday night..South winds 5 to 10 knots becoming southwest after midnight. Seas 1 to 2 feet. Chance of showers and Thunderstorms.
Tuesday..South winds 5 to 10 knots becoming southeast in the afternoon. Seas 1 to 2 feet. Chance of showers and Thunderstorms.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 323 Am Edt Fri Aug 7 2020
Synopsis.. The area will remain situated on the western edge of a ridge of high pressure. This will lead to predominantly south-southwesterly flow with a shift to onshore winds each afternoon as the daily sea breeze front moves inland. Daily afternoon showers and Thunderstorms anticipated.
Gulf stream.. The approximate location of the west wall of the gulf stream as of aug 06, 2020 at 1200 utc... 65 nautical miles east of flagler beach. 72 nautical miles east of saint augustine beach. 82 nautical miles east of jacksonville beach. 98 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, FL
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location: 29.87, -81.31     debug


Area Discussion for - Jacksonville, FL
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FXUS62 KJAX 071120 AFDJAX

Area Forecast Discussion National Weather Service Jacksonville FL 720 AM EDT Fri Aug 7 2020

AVIATION. [Through 12Z Saturday]

Typical Moist Southwest flow with Precipitable Water Amounts around 2 inches will support another brief round of heavy storms at local TAF sites, 18-21Z at GNV, 19-22Z at VQQ and generally 20-24Z for the remaining TAF sites. For now have kept the TEMPO groups with mainly MVFR conds with gusty winds to 25 knots, but some potential for IFR conds and stronger winds gusts exists and will be updated as conditions warrant.

PREV DISCUSSION [323 AM EDT].

NEAR TERM [Through Tonight].

Hot, humid, stormy conditions to continue today. A weak trough remains draped over the region with an elongated ridge of high pressure just to our east. This will lead to continued deep layer south-southwesterly flow today and tonight. The highest area of thunderstorm coverage today is expected to be along the I-95 corridor and across north-central FL where PW values are forecast to be 2"+ and afternoon MLCAPE of 2000+ J/kg will be on tap. Some of these storms will be capable of producing damaging wind gusts and hail. As for temperatures, highs this afternoon will be in the low-mid 90s with heat indices of 100-105. Overnight, temperatures will only dip into the mid-upper 70s.

SHORT TERM [Saturday Through Sunday].

Latest guidance indicating a hot, humid weekend for our area, with high temperatures in the mid 90s inland, lower 90s coast, and dew points in the mid 70s leading to afternoon heat index values in the 104-108 range. Models show scattered to numerous showers and thunderstorms with sea breezes that collide over interior portion of northern FL peninsula and southeast GA, resulting in precipitation coverage maximum. Environment will feature precipitable water values above 2 inches and 500mb temperature around -7C or -8C . fairly favorable for wet microbursts from the more intense storms that develop along converging boundaries each afternoon.

LONG TERM [Monday Through Friday].

Latest medium range guidance shows very little pattern change, with upper ridge stuck across our forecast area . continued hot and humid with scattered to numerous showers and thunderstorms each afternoon with sea breezes. Very little change in max/min temperatures through this period.

MARINE.

The area will remain situated on the western edge of a ridge of high pressure. This will lead to predominantly south-southwesterly flow with a shift to onshore winds each afternoon as the daily sea breeze front moves inland. Daily afternoon showers and thunderstorms anticipated.

Rip Currents: SE GA - Low risk of rip currents into the weekend NE FL - Moderate risk of rip currents into the weekend

PRELIMINARY POINT TEMPS/POPS.

AMG 93 75 94 74 95 / 40 20 50 20 60 SSI 89 79 92 78 91 / 30 20 40 20 50 JAX 92 77 95 76 95 / 50 30 60 20 60 SGJ 89 77 92 75 92 / 40 20 50 10 60 GNV 91 75 94 75 94 / 50 30 60 20 70 OCF 91 75 93 75 93 / 50 30 60 10 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
SAUF1 - St. Augustine, FL 3 mi62 min SW 1.9 G 2.9 76°F 83°F1018.5 hPa (+1.2)73°F
41117 15 mi36 min 83°F2 ft
GTXF1 - Guana Tolomato Matanzas Reserve, FL 15 mi77 min WSW 1 72°F 1019 hPa71°F
LTJF1 36 mi50 min 76°F 73°F
MYPF1 - 8720218 - Mayport (Bar Pilots Dock), FL 37 mi44 min SSW 1.9 G 1.9 76°F 85°F1018.6 hPa
BLIF1 38 mi50 min S 2.9 G 2.9 77°F 1019.1 hPa77°F
DMSF1 38 mi44 min 86°F
NFDF1 40 mi44 min S 2.9 G 4.1 72°F 72°F

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, FL7 mi66 minS 310.00 miFair73°F72°F96%1018.3 hPa

Link to 5 minute data for KSGJ

Wind History from SGJ (wind in knots)
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Last 24hrCalmSW4CalmE8E9E8E7SE11SE11SE13SE5NW9
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1 day agoS5SW4SW3E9SE9SE11SE10SE14
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2 days agoSW5SW5SW33SE7E8E10SE12SE11SE16SE17S12SW8CalmNW6SW6CalmCalmCalmCalmW6W5CalmS4

Tide / Current Tables for St. Augustine, city dock, Florida (2)
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St. Augustine
Click for Map
Fri -- 05:51 AM EDT     0.37 feet Low Tide
Fri -- 06:48 AM EDT     Sunrise
Fri -- 10:18 AM EDT     Moonset
Fri -- 11:52 AM EDT     4.55 feet High Tide
Fri -- 06:00 PM EDT     0.68 feet Low Tide
Fri -- 08:12 PM EDT     Sunset
Fri -- 10:55 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.94.43.52.41.30.60.40.81.72.73.74.34.54.23.52.51.60.90.711.82.73.64.4

Tide / Current Tables for East Tocoi, St. Johns River, Florida (2)
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East Tocoi
Click for Map
Fri -- 05:41 AM EDT     5.85 feet High Tide
Fri -- 06:49 AM EDT     Sunrise
Fri -- 10:19 AM EDT     Moonset
Fri -- 12:18 PM EDT     4.94 feet Low Tide
Fri -- 06:00 PM EDT     5.77 feet High Tide
Fri -- 08:13 PM EDT     Sunset
Fri -- 10:56 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.955.35.55.75.85.85.75.55.35.254.955.25.45.65.75.85.75.55.35.25

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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Jacksonville, FL (8,2,3,4)
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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.