Thursday, December12, 2019
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Marine Weather and Tides
St. Augustine South, FL

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:08AMSunset 5:28PM Thursday December 12, 2019 2:05 PM EST (19:05 UTC) Moonrise 6:04PMMoonset 7:28AM Illumination 99% Phase: Waning Gibbous; Moon at 16 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:201912130000;;243696 Fzus52 Kjax 121553 Cwfjax Coastal Waters Forecast For Northeast Florida/southeast Georgia National Weather Service Jacksonville Fl 1053 Am Est Thu Dec 12 2019 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. Amz450-452-454-130000- 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- 1053 Am Est Thu Dec 12 2019
.small craft advisory in effect through Friday morning...
Rest of today..East northeast winds 20 to 25 knots with gusts to around 30 knots. Seas 7 to 10 feet with occasional seas up to 13 feet. Dominant period 8 seconds. Inland waters choppy. Showers likely.
Tonight..East winds 15 to 20 knots. Seas 6 to 8 feet with occasional seas up to 10 feet. Dominant period 9 seconds. Inland waters a moderate chop. Showers and a chance of Thunderstorms.
Friday..Southeast winds 10 to 15 knots becoming west southwest 5 to 10 knots in the afternoon. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 9 seconds. Inland waters a light chop. Showers and a slight chance of Thunderstorms.
Friday night..South southwest winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 9 seconds. Inland waters a light chop. A chance of showers and a slight chance of Thunderstorms.
Saturday..West southwest winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 9 seconds. Inland waters a moderate chop. A chance of showers.
Saturday night..West northwest winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet.
Sunday..Northwest winds 5 to 10 knots becoming east southeast in the afternoon. Seas 2 to 3 feet.
Sunday night and Monday..South southeast winds 5 to 10 knots. Seas 2 to 3 feet.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 1053 Am Est Thu Dec 12 2019
Synopsis.. Strong high pressure will build over the mid atlantic region today. A warm front over south florida will lift northward through tonight, then an area of low pressure will develop along the front over the gulf of mexico Friday. This low will track northeast across the local area Friday night as a weak cold front will slides south across the local waters early Saturday. High pressure will build over the area on Sunday then shift east of the local waters Monday.
Gulf stream.. The approximate location of the west wall of the gulf stream as of dec 12, 2019 at 1200 utc... 64 nautical miles east northeast of flagler beach. 64 nautical miles east northeast of saint augustine beach. 71 nautical miles east of jacksonville beach. 99 nautical miles east of st simons island. This data courtesy of the naval oceanographic office.


7 Day Forecast for Marine Location Near St. Augustine South CDP, FL
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location: 29.87, -81.31     debug


Area Discussion for - Jacksonville, FL
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FXUS62 KJAX 121813 AFDJAX

Area Forecast Discussion National Weather Service Jacksonville FL 113 PM EST Thu Dec 12 2019

AVIATION. [Through 18Z Friday]

Cloud bases were starting to lower into the 1.5-3 kft range with coastal showers moving onshore near SGJ. This activity will continue to drift northward toward Duval county terminals into the afternoon. ENE Winds were starting to subside along the local coast with gusts down to 15-25 kts at times. Winds to veer farther E tonight with gradually decreasing magnitudes with locally heavy rainfall overspreading coastal terminals this evening and persist into tonight with IFR conditions expected through early Fri morning. Ceilings will lift to MVFR and potentially VFR during the afternoon Fri under warm SSW flow.

PREV DISCUSSION [935 AM EST].

NEAR TERM [Through Tonight].

A shortwave was moving across southern Georgia early this morning, and this was responsible for the light radar returns over southeast Georgia and the Suwannee Valley. This feature is forecast to remain rather persistent through the day while slowly dampening, and rainfall amounts up to 1 inch are possible across the Suwannee Valley and along I-10 through Baker County today. A frontal boundary was across central Florida early this morning, and strong high pressure was pushing to the coast of the Mid Atlantic states. A local nor'easter has setup with the tight pressure gradient, resulting in breezy to windy conditions. A Wind Advisory remains in place through the afternoon hours, with the strongest winds this morning. A coastal trough will develop this afternoon, and this will weaken the pressure gradient.

The frontal boundary over central Florida will lift back northward today and tonight, and be located near the FL/GA border by Friday morning. An area of low pressure is forecast to develop along the boundary near the coast of northeast Florida late tonight as well. Rain chances will increase from south to north along the coast, with steady light rain expected across at least the coastal areas this afternoon. Rainfall amounts for the coastal counties are forecast to be around 0.25-0.5" this afternoon. Another shortwave will move across the eastern Gulf late this afternoon and move across northeast Florida overnight as the frontal boundary moves northward towards the FL/GA border. Coastal convergence and the additional lift is forecast to lead to another 0.5-1" along the coast, with locally higher amounts. Across interior southeast Georgia and the Suwannee Valley, isentropic lift will increase along and north of the front, with rainfall amounts of 0.5-1" also possible. A few thunderstorms cannot be ruled out over northeast Florida as well, but most of the storms will remain over the coastal waters.

High temperatures will range from the mid to upper 50s across southeast Georgia to the lower 70s across north central Florida. Lows tonight will be in the upper 40s to low 50s across interior southeast Georgia and the upper 50s to lower 60s elsewhere.

SHORT TERM [Friday Through Saturday].

Showers along with a slight chance for thunderstorms will cross the region on Friday, occurring in conjunction with a short wave trough crossing over southeastern Georgia and northeastern Florida. Rainfall amounts are expected to range between about 0.50 inches for the southernmost Counties and around 1 inch for inland southeast Georgia, along with areas near the Suwannee River basin and along the coastline. Showers will clear out through Saturday morning and then be followed by drier conditions and cooler air. Temperatures for the beginning of the weekend are expected to be near climatological normals, with max temps ranging within the 60s and 70s. Overnight low temperatures from out of the 50s on Friday and reach down into the 40s on Saturday.

LONG TERM [Sunday Through Thursday].

High pressure will continue to build over the region on Sunday and then drift off to the west on Monday. Convection and warming temps are expected on Tuesday as a warm southwesterly flow strengthens in advance of a cold front, which is expected to bring convection over the area into Wednesday, with cold temperatures and clearing skies. Daily high temperatures will rise on Monday and Tuesday in association with the southwesterly flow with temps rising into the mid 70s and then cooling down into the 50s and lower 60s on Wednesday, following the frontal passage. Min temps will similarly peak in the 50s on Tuesday before cooling to potentially freezing temps on Wednesday night.

MARINE.

Grays Reef Buoy 41008 continued to reported strong NE winds 25 kts with gusts to 31 kts for the the past 4 hours with combined seas 7-8 ft. Current Gale Warning for the outer waters was on track and will continue through 3 pm. Anticipate canceling the near shore water Gale Warning around 10 am as gusts are not quite as strong and just following up with the Small Craft Advisory through Friday. Light to moderate rainfall activity will move offshore of the SE GA coast through the next couple of hours, then rain chances will increase from the south toward Flagler Beach this afternoon. Numerous showers expected to increase in coverage this evening and overnight along the local Atlantic waters, with locally heavy rainfall at times causing poor visibility.

Surf Conditions: A high risk of rip currents will continue for all beaches today due to strong onshore flow and elevated water levels. A high surf advisory will continue for NE FL beaches where morning surf reports indicated about 4-6 ft from JAX Beach to Flagler Beach Pier.

HYDROLOGY.

High tide was just flirting right around Action stage this morning along the local Atlantic coast with Mayport nearing 1.12 ft creeping toward a peak crest. Current Coastal Flood Statement for the immediate NE FL Atlantic coast was on track as this tide is expected to be the peak for this surge event with the full moon tonight. Elevated water levels will funnel into the St. Johns River basin with high tide through early afternoon, but with up to 1 ft of surge potential with high tide, the majority of gages within the St. Johns will remain below Action Stage. One area of exception will be near Dunns Creek at Satsuma and Buffalo Bluff where tides are already about running about +0 5 ft. and up to a foot of rise could place these locations near Action Stage this afternoon. Will monitor trends to see if a short duration Coastal Flood Advisory may be needed for the St. Johns in Putnam county.

PRELIMINARY POINT TEMPS/POPS.

AMG 49 62 54 67 42 / 100 80 60 30 0 SSI 56 66 58 68 47 / 100 90 40 40 0 JAX 58 70 58 72 46 / 80 80 50 40 0 SGJ 60 72 59 73 48 / 80 50 40 40 0 GNV 60 72 60 72 46 / 50 60 50 40 0 OCF 60 75 60 75 46 / 40 40 50 40 0

JAX WATCHES/WARNINGS/ADVISORIES. FL . High Rip Current Risk until 10 PM EST this evening for Coastal Duval-Coastal Flagler-Coastal Nassau-Coastal St. Johns.

High Surf Advisory until 10 PM EST this evening for Coastal Duval-Coastal Flagler-Coastal Nassau-Coastal St. Johns.

Wind Advisory until 3 PM EST this afternoon for Coastal Duval- Coastal Flagler-Coastal Nassau-Coastal St. Johns.

GA . High Rip Current Risk until 10 PM EST this evening for Coastal Camden-Coastal Glynn.

AM . Small Craft Advisory until 3 PM EST Friday for Waters from Altamaha Sound GA to Fernandina Beach FL from 20 to 60 NM- Waters from Fernandina Beach to St. Augustine FL from 20 to 60 NM-Waters from St. Augustine to Flagler Beach FL from 20 to 60 NM.

Gale Warning until 3 PM EST this afternoon for Waters from Altamaha Sound GA to Fernandina Beach FL from 20 to 60 NM- Waters from Fernandina Beach to St. Augustine FL from 20 to 60 NM-Waters from St. Augustine to Flagler Beach FL from 20 to 60 NM.

Small Craft Advisory until 8 AM EST Friday for 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.


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SAUF1 - St. Augustine, FL 3 mi66 min ENE 13 G 14 69°F 65°F1025.5 hPa (-2.4)
41117 15 mi36 min 67°F8 ft
GTXF1 - Guana Tolomato Matanzas Reserve, FL 15 mi81 min NE 5.1 71°F 1027 hPa66°F
LTJF1 36 mi60 min 64°F
MYPF1 - 8720218 - Mayport (Bar Pilots Dock), FL 37 mi48 min NNE 19 G 25 63°F 63°F1026.8 hPa
BLIF1 38 mi54 min NNE 18 G 24 64°F 1027.8 hPa63°F
DMSF1 38 mi54 min 64°F
NFDF1 40 mi54 min NNE 9.9 G 19 61°F 1028 hPa

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 mi70 minNNE 75.00 miLight Rain Fog/Mist67°F64°F91%1026.1 hPa

Link to 5 minute data for KSGJ

Wind History from SGJ (wind in knots)
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Last 24hrN14N16
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1 day agoSE9SE9SE6S8S5S5SW3S3SW5SW4S4W3SW5SW6W5W6W4N10N8N9N11N18N15
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2 days agoSE10SE8SE7S6SE7S5S5SW5SW3SW4SW5CalmSW4CalmSW3CalmCalmCalmS4S8SW7SW7SW10S8
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Tide / Current Tables for State Road 312, 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 Crescent Beach, Matanzas River, 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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Jacksonville, FL (14,3,4,5)
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Ground Weather Radar Station Jacksonville, FL
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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 numerious 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.