Thursday, April25, 2019 L-36.com


Marine Weather and Tides
St. Augustine, FL

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:46AMSunset 8:00PM Thursday April 25, 2019 8:22 PM EDT (00:22 UTC) Moonrise 12:16AMMoonset 10:49AM Illumination 60% Phase: Waning Gibbous; Moon at 21 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:201904260530;;477665 Fzus52 Kjax 251938 Cwfjax Coastal Waters Forecast For Northeast Florida/southeast Georgia National Weather Service Jacksonville Fl 338 Pm Edt Thu Apr 25 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. Amz450-452-454-260530- 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- 338 Pm Edt Thu Apr 25 2019
Tonight..South southwest winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 5 seconds. Inland waters a moderate chop.
Friday..West winds 15 to 20 knots. Seas 2 to 4 feet. Dominant period 5 seconds. Inland waters a moderate chop. A chance of showers and a slight chance of Thunderstorms.
Friday night..North northwest winds 15 to 20 knots. Seas 2 to 4 feet. Dominant period 4 seconds. Inland waters a moderate chop.
Saturday..North northeast winds 10 to 15 knots becoming southeast 5 to 10 knots in the afternoon. Seas 2 to 3 feet. Dominant period 5 seconds. Inland waters a light chop.
Saturday night..South winds 5 to 10 knots. Seas 1 to 2 feet. Inland waters a light chop.
Sunday and Sunday night..South southeast winds 10 to 15 knots. Seas 2 to 3 feet. Inland waters a moderate chop.
Monday..East southeast winds 5 to 10 knots. Seas 1 to 2 feet. Inland waters a light chop.
Monday night and Tuesday..East southeast winds 5 to 10 knots. Seas 2 to 3 feet. Inland waters mostly smooth.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 338 Pm Edt Thu Apr 25 2019
Synopsis.. Southerly winds will increase over the waters through tonight ahead of an approaching cold front. The front will cross the waters Friday with showers and Thunderstorms. High pressure will build west of the region Saturday, then over the local waters Sunday. High pressure will build offshore of southeast atlantic coast Monday.
Gulf stream.. The approximate location of the west wall of the gulf stream as of apr 25, 2019 at 1200 utc... 69 nautical miles east of flagler beach. 80 nautical miles east of saint augustine beach. 96 nautical miles east southeast of jacksonville beach. 110 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, FL
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location: 29.88, -81.31     debug


Area Discussion for - Jacksonville, FL
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Fxus62 kjax 252037
afdjax
area forecast discussion
national weather service jacksonville fl
437 pm edt Thu apr 25 2019

Marginal risk of severe weather later tonight into Friday...

Near term (through Friday night)
A southern-stream upper low near the ARKLATEX region will open
up to the NE as it gets absorbed by a large northern stream
trough by later tonight. The upper trough and associated
cold front will traverse the area later tonight into Friday
morning before exiting the area Friday afternoon. While most
of the stronger dynamics lifts north of the area... There will
be a modest amount of deep layer shear (40-50 knots) along
with modest amounts of instability initially towards the gulf
coast overnite and then across the fl peninsula on Friday.

Some storms may become severe overnite towards the gulf coast
and possibly move towards the suwannee valley and portions of
inland SE ga. The threat will shift to across the fl peninsula
on Friday mainly to the south of jacksonville and gainesville.

The main concerns will be damaging winds and also the possibility
of hail due to cool temps aloft. The activity is expected to exit
the eastern half of the area during the afternoon with clouds
decreasing from northwest to southeast following the passage of
the front. Strong winds aloft may also mix down... As clouds
decrease... Resulting in breezy conditions Friday afternoon with
wind gusts over 30 mph possible. Afternoon temps warm to slightly
above normal Friday afternoon and cool to slightly below normal
Friday night as a cooler and drier air mass moves into the area.

Short term (Saturday-Sunday night)
Surface high pressure builds into the area over the weekend while
the flow aloft transitions to near zonal. This results in clear
and dry conditions with light winds. Seabreezes will develop along
the coast in the afternoons. Temps start out near normal Saturday
and warm to above normal Sunday.

Long term (Monday-Thursday)
Deep layer ridging will dominate the region through most of the
period resulting in a continuation of the mostly clear and dry
conditions. Temps expected to be above normal with afternoon
temps near 90 degrees inland and lower 80s coast.

Aviation Vfr conditions will prevail through the afternoon.

East coast sea breeze moving inland, and southeast winds 10-15
knots are expected this afternoon for the east coast TAF sites.

Light south to southwest winds this evening will increase after
midnight as a frontal boundary approaches the area. Showers are
possible near the TAF sites in the early morning hours, with
thunderstorms possible near kgnv. MVFR CIGS are possible at the
taf sites as the showers approach, with the best chance of
restrictions at kgnv. West southwest winds will increase to 10-15
knots by noon on Friday with a couple leftover showers possible
near the TAF sites.

Marine A cold front will sweep across the waters Friday morning
bringing scattered showers and a few storms. Winds increase out
ahead of the cold front with scec conditions for the offshore
tonight then SCA for the offshore and scec for the near shore
Friday and Friday night. No headlines expected beyond Friday night
as high pressure will be the dominant factor.

Rip currents: low risk Friday under offshore flow.

Preliminary point temps pops
Amg 64 83 50 84 40 40 0 0
ssi 68 84 59 77 20 40 0 0
jax 65 84 53 82 20 30 0 0
sgj 68 86 60 79 10 40 0 0
gnv 65 85 53 85 40 40 0 0
ocf 66 84 53 86 30 50 0 0

Jax watches warnings advisories
Fl... None.

Ga... None.

Am... Small craft advisory from 10 am Friday to 4 am edt Saturday 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.

Pp ak kb


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SAUF1 - St. Augustine, FL 3 mi23 min SE 19 G 22 74°F 76°F1013 hPa (-1.4)69°F
RCYF1 14 mi35 min 80°F
41117 15 mi23 min 73°F3 ft
GTXF1 - Guana Tolomato Matanzas Reserve, FL 16 mi98 min SE 8.9 76°F 1015 hPa70°F
LTJF1 35 mi35 min 74°F
MYPF1 - 8720218 - Mayport (Bar Pilots Dock), FL 36 mi35 min SSE 9.9 G 15 74°F 73°F1012.6 hPa
BLIF1 37 mi35 min SE 12 G 16 75°F 1013.2 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
Northeast Florida Regional Airport, FL6 mi27 minSSE 1110.00 miFair74°F68°F82%1013.1 hPa

Wind History from SGJ (wind in knots)
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Last 24hrS7S8S6S7SW5CalmSW3CalmSW3SW3S3SW5S9SW8SW7S7E10SE11SE12SE12SE10SE12SE12SE11
1 day agoS4S5CalmCalmCalmSW3W7W5W4W6SW5SW6SW7W9SW66NW44SE10SE8SE9SE11SE7S8
2 days agoSE4CalmCalmCalmSW3W4W7W4CalmW3W3CalmW6SW44E7E8E8E9E9E9E9SE7SE5

Tide / Current Tables for St. Augustine, city dock, Florida
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St. Augustine
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Thu -- 01:16 AM EDT     Moonrise
Thu -- 01:26 AM EDT     4.60 feet High Tide
Thu -- 06:48 AM EDT     Sunrise
Thu -- 08:17 AM EDT     0.47 feet Low Tide
Thu -- 11:49 AM EDT     Moonset
Thu -- 01:56 PM EDT     3.61 feet High Tide
Thu -- 07:58 PM EDT     Sunset
Thu -- 08:19 PM EDT     0.65 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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44.54.543.22.31.50.80.50.61.11.92.83.43.63.42.82.21.510.70.81.32.2

Tide / Current Tables for East Tocoi, St. Johns River, Florida (4)
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East Tocoi
Click for Map
Thu -- 01:17 AM EDT     Moonrise
Thu -- 02:25 AM EDT     0.21 feet Low Tide
Thu -- 06:49 AM EDT     Sunrise
Thu -- 07:58 AM EDT     0.96 feet High Tide
Thu -- 11:50 AM EDT     Moonset
Thu -- 03:22 PM EDT     0.28 feet Low Tide
Thu -- 07:59 PM EDT     Sunset
Thu -- 08:24 PM EDT     0.82 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.30.20.20.40.60.80.910.90.80.70.50.40.30.30.30.40.60.70.80.80.80.7

Weather Map and Satellite Images
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wmap_A
GOES 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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Wind Forecast for Jacksonville, FL (20,4,5,8)
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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 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.