Tuesday, September17, 2019 L-36.com


Marine Weather and Tides
St. Augustine, FL

Version 3.4
NOTICE
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 7:09AMSunset 7:30PM Tuesday September 17, 2019 6:46 AM EDT (10:46 UTC) Moonrise 8:44PMMoonset 9:03AM Illumination 89% 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:201909171615;;913918 Fzus52 Kjax 170809 Cwfjax Coastal Waters Forecast For Northeast Florida/southeast Georgia National Weather Service Jacksonville Fl 409 Am Edt Tue Sep 17 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. Amz452-454-171615- Coastal Waters From Fernandina Beach To St. Augustine Fl Out 20 Nm- Coastal Waters From St. Augustine To Flagler Beach Fl Out 20 Nm- 409 Am Edt Tue Sep 17 2019
.small craft advisory in effect through Thursday morning...
Today..North northeast winds 10 to 15 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 10 seconds. Inland waters a moderate chop.
Tonight..East northeast winds 5 to 10 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 11 seconds. Inland waters a light chop.
Wednesday..Northeast winds 15 to 20 knots. Seas 6 to 8 feet with occasional seas up to 10 feet. Dominant period 12 seconds. Inland waters a moderate chop. A chance of showers and a slight chance of Thunderstorms.
Wednesday night..East northeast winds 15 to 20 knots. Seas 6 to 9 feet with occasional seas up to 11 feet. Dominant period 12 seconds. Inland waters choppy. A chance of showers and a slight chance of Thunderstorms.
Thursday..Northeast winds 15 to 20 knots. Seas 7 to 10 feet with occasional seas up to 13 feet. Dominant period 12 seconds. Inland waters choppy. A chance of showers.
Thursday night..East northeast winds 20 to 25 knots. Seas 7 to 10 feet with occasional seas up to 13 feet. A chance of showers and a slight chance of Thunderstorms.
Friday and Friday night..East winds 15 to 20 knots. Seas 6 to 9 feet with occasional seas up to 11 feet. A chance of showers.
Saturday..East winds 10 to 15 knots. Seas 6 to 9 feet with occasional seas up to 11 feet. A slight chance of showers.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 409 Am Edt Tue Sep 17 2019
Synopsis.. Northeast winds near 15 knots with gusts to 20 knots will persist today over our offshore coastal waters. Though this is below advisory criteria, seas will be slower to fall and remain around 6 feet everywhere except our near-shore waters along the southeast georgia coastline through Wednesday. Winds and seas will build again Wednesday night and will remain elevated through the week, so the advisory is likely to continue for the next few days.
Gulf stream.. The approximate location of the west wall of the gulf stream as of sep 17, 2019 at 1200 utc... 67 nautical miles east northeast of flagler beach. 72 nautical miles east of saint augustine beach. 78 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, FL
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location: 29.88, -81.31     debug


Area Discussion for - Jacksonville, FL
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Fxus62 kjax 170813
afdjax
area forecast discussion
national weather service jacksonville fl
413 am edt Tue sep 17 2019

Near term
Deep layer ridging will nudge eastward toward the area today and
tonight. As it does so, pw values are forecast to fall below 1.5"
across the area during the day, though overnight they'll increase
back above 1.5" in SE ga and along the eastern seaboard. Dry and
hot conditions are expected during the day, but scattered showers
will be possible overnight, mostly along the SE ga coastline.

Highs today will rise into the mid-upper 90s across the area and
lows tonight will dip into the upper 60s to low 70s.

Short term
Backdoor cold front is forecast to push through the forecast area
wed with models in good agreement showing enhanced moisture and
areas of moderate to locally strong convergence. Advertising
chance of showers and a few storms over the ERN zones early part
of the day... Then chance of showers and storms becoming more
focused inland areas as the front pushes to the southwest. Highs
will be upper 80s eastern zones and lower 90s inland under
increasing cloudiness. Wed night... Chance of showers and a few
evening storms mainly inland as winds continue out of the
northeast and east as sfc ridge builds southward over the ERN u.S.

Drier conditions will slowly filter into the area but cannot rule
out a couple of showers being possible after midnight as winds
pick up over the atlantic waters and low level moisture remains
high. Thursday... Sfc high pressure will build southward along the
southeast u.S. Coast while northeast flow continues and supports a
risk of a few showers off the warm atlantic waters. Post-frontal
max temps will be quite lower held in the 80s... With lower 80s
possible for the coastal counties. Best chance of showers will be
from fernandina beach to flagler beach. Breezy northeast winds
expected along the ERN zones up to 15-20 mph, gusting to near
30-35 mph. Thu night... Chance of showers will remain over the ern
parts of the given persistent northeast flow. Breezy conditions
should remain confined for the coastal areas. Lowest min temps
expected to be lower 60s inland southeast ga and ranging to the
70-75 deg range for coastal northeast fl from the onshore flow.

Long term
General trend in the guidance is high pressure will build
southward into the area resulting in decrease onshore flow and
gradual increase in MAX temps each day. Best chance for some
coastal showers will be Friday when the east-northeast flow
remains breezy. Otherwise, the air-mass remains dry except for
some low level moisture and an isolated shower or two possible
over the weekend and early next week but most areas will remain
dry.

Aviation
With calm winds, high surface humidity, and clear skies, patchy
fog (mostly MVFR vsbys) will be possible this morning though
around 12z. North winds will begin to increase across the area
around 15z, then winds at sites along the coast will become more
easterly in the afternoon. Winds will calm again overnight and
patchy fog will be possible again, though it would likely be at
the tail end of this TAF cycle.

Marine
Northeast winds around 15 knots with gusts to 20 knots will
persist today over our offshore coastal waters. Though this is
below advisory criteria, waves will be slower to fall and remain
around 6 ft everywhere except our near-shore waters along the
southeast georgia coastline through Wednesday. Winds and seas will
build again Wednesday night and will remain elevated through the
week, so the advisory is likely to continue for the next few days.

Rip currents: the high risk of rip currents is expected to
continue across area beaches through at least tomorrow night.

Offshore seas of around 5-7 ft will persist today, so surf
heights will mostly be around 4-6 ft, below the 7 ft high surf
advisory criteria. Surf heights are expected to increase again
tomorrow into tomorrow night.

Fire weather
Weak high pressure will prevail today with mostly sunny skies and
hotter temperatures and dry conditions producing min rh values
that will range from 30 to 35 percent generally north of i-10 and
west of i-95. High mixing heights today will create some elevated
dispersion values above 75 in some inland areas.

A cold front will shift southward and southwest through the area
on Wednesday, resulting in a chance of showers and thunderstorms.

Winds will shift to the northeast and east as the front pushes
through the area. Breezy winds near 15 mph will develop along the
coastal counties Wednesday afternoon as high pressure builds north
of the area and the front pushes southwest.

Hydrology
Tidal gauges along the st. Johns river continue to show water
levels elevated about 1 ft above predicted tide, reaching into
action stage, but not flood stage. Water levels are expected to
remain elevated with the persistent northeast flow, so have
extended the coastal flood statement through tonight. Chances for
scattered showers will return tomorrow, but widespread rainfall
accumulations will remain low, so there are no additional flood
concerns.

Preliminary point temps pops
Amg 96 71 90 65 0 0 40 10
ssi 90 75 85 71 0 40 50 10
jax 94 73 88 70 0 10 40 20
sgj 90 74 87 73 0 0 40 30
gnv 95 69 91 69 0 0 40 20
ocf 95 70 92 69 0 0 50 20

Jax watches warnings advisories
Fl... High rip current risk through Thursday morning for coastal duval-
coastal flagler-coastal nassau-coastal st. Johns.

Ga... High rip current risk through Thursday morning for coastal
camden-coastal glynn.

Am... Small craft advisory until 8 am edt Thursday for coastal waters
from fernandina beach to st. Augustine fl out 20 nm-coastal
waters from st. Augustine to flagler beach fl out 20 nm-
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.

Nguyen shashy


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SAUF1 - St. Augustine, FL 3 mi47 min W 6 G 8 75°F 83°F1013 hPa (-0.0)
41117 15 mi17 min 83°F6 ft
GTXF1 - Guana Tolomato Matanzas Reserve, FL 16 mi62 min W 2.9 70°F 1014 hPa70°F
LTJF1 35 mi47 min 78°F
JXUF1 36 mi47 min 84°F
MYPF1 - 8720218 - Mayport (Bar Pilots Dock), FL 36 mi47 min WNW 5.1 G 6 77°F 84°F1013.3 hPa (+0.0)
BLIF1 37 mi47 min W 2.9 G 2.9 77°F 1014 hPa (+0.0)76°F
DMSF1 37 mi47 min 84°F
NFDF1 40 mi47 min Calm G 1.9 70°F 1014.8 hPa (-0.3)

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 mi1.8 hrsWNW 710.00 miFair0°F0°F%1013.2 hPa

Link to 5 minute data for KSGJ

Wind History from SGJ (wind in knots)
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Last 24hr--NW8----N13N16N15N14
G20
N14N14------N4CalmCalmW4----------W7W6
1 day ago--NE13----NE16NE16--N16
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N11N12--N12----N12--N14--N13
2 days ago--NE17
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----------------NE12

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Jacksonville, FL (6,6,7,8)
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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.