Thursday, March21, 2019 L-36.com


Marine Weather and Tides
St. Marys, GA

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 7:27AMSunset 7:39PM Thursday March 21, 2019 8:21 AM EDT (12:21 UTC) Moonrise 7:33PMMoonset 7:07AM Illumination 100% Phase: Full Moon; Moon at 15 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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AMZ450 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- 306 Am Edt Thu Mar 21 2019
.small craft exercise caution...
Today..West southwest winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 10 seconds. Inland waters a light chop.
Tonight..West northwest winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 10 seconds. Inland waters choppy.
Friday..West winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Inland waters a light chop.
Friday night..Northwest winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 10 seconds. Inland waters a moderate chop.
Saturday..North winds 5 to 10 knots becoming northeast in the afternoon. Seas 2 to 3 feet. Inland waters a light chop.
Saturday night..East winds 5 to 10 knots. Seas 2 to 3 feet. Inland waters a light chop.
Sunday..East southeast winds 5 to 10 knots. Seas 2 to 3 feet. Inland waters a light chop.
Sunday night..Southeast winds around 10 knots becoming south after midnight. Seas 2 to 3 feet. Inland waters a light chop.
Monday..South winds 10 to 15 knots. Seas 2 feet. Inland waters a light chop.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 306 Am Edt Thu Mar 21 2019
Synopsis.. An area of low pressure will push offshore north of the waters tonight and increase the winds and seas. High pressure will build northwest of the waters over the weekend with diminishing winds and seas.
Gulf stream.. The approximate location of the west wall of the gulf stream as of mar 21, 2019 at 1200 utc... 59 nautical miles east of flagler beach. 72 nautical miles east of saint augustine beach. 82 nautical miles east of jacksonville beach. 94 nautical miles east southeast of st simons island. This data courtesy of the naval oceanographic office.


7 Day Forecast for Marine Location Near St. Marys, GA
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location: 30.72, -81.55     debug


Area Discussion for - Jacksonville, FL
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Fxus62 kjax 210722
afdjax
area forecast discussion
national weather service jacksonville fl
322 am edt Thu mar 21 2019

Breezy winds and low humidities will create elevated fire
danger conditions this afternoon...

Near term today-tonight
Today... Weak high pressure this morning will give way to low
pressure trof over the SE us that will push the SE us coast by the
late afternoon and evening hours. This will increase the west to
southwest surface flow across the region this afternoon with
breezy flow developing with sustained winds of 15-20 mph with
gusts to 25-30 mph across the region. A few clouds can be expected
from time-to-time but overall mostly sunny skies will prevail with
mild temps pushing into the lower to middle 70s area-wide.

Tonight... Low pressure trof pushes offshore and decent northwest
steering flow will push in another dry airmass. Clear skies are
expected overnight and normally would be good radiational cooling
conds but light w-nw flow will remain elevated around 5 mph or so
and overnight lows temps will be limited to the 40s, with possibly
some upper 30s in cooler more wind sheltered locations.

Short term Friday through Saturday night Ridging at surface
and aloft will build into SE ga NE fl Friday and Saturday. A very
dry airmass over the area will result in mostly clear skies. Winds
will be lighter especially on Saturday as the ridge axis moves
over the area. High temperatures will be in the 70s with lows in
the 40s.

Long term Sunday through Wednesday Surface high pressure
will move off the east coast on Sunday which will start a return
flow with a continued warming trend. An upper trough will push a
cold front across the area on Tuesday. This will bring a chance
for showers and isolated thunderstorms Monday night and Tuesday.

Wednesday will be breezy and cooler on Wednesday behind the cold
front with winds becoming onshore.

Aviation
Vfr with gusty W SW winds from 16-00z at 12g18 knots at the taf
sites.

Marine
Offshore flow develops today with the approach of trof from the nw
and winds will increase once again tonight and will keep small
craft advisory posted for the offshore waters, mainly due to seas
today and winds seas tonight, looks to be just short of SCA along
the coast and will keep scec for the nearshore waters in place.

Strong winds elevated seas peak late tonight and start to decrease
on Friday with winds seas falling below headline levels for the
weekend and into early next week as high pressure builds closer to
the region.

Rip currents surf: lingering swell will continue a moderate risk
of rip currents today with surf breakers early in the day at 3-5
ft then continuing to subside as the flow becomes more offshore.

Coastal flood: still expect elevated water levels with full moon
high tide cycle again this morning, but with the offshore flow
developing should only see "action elevated" peak levels this
morning along the coast and down the st johns river basin early
this afternoon. Will issue a coastal flood statement to account
for these conditions.

Fire weather Surface trough will increase the west winds this
afternoon to around 15 mph with gusts to 20 mph. These winds
combined with minimum relative humidity of 25 to 30 percent and
marginal fuel moisture levels will produce a high fire danger this
afternoon. Dispersions values will also be high due to high
mixing heights and winds. On Friday rh values will be critically
low again with sustained winds at 10 to 15 mph.

Preliminary point temps pops
Amg 73 40 71 44 0 0 0 0
ssi 70 49 69 50 0 0 0 0
jax 75 46 73 48 0 0 0 0
sgj 74 49 72 51 0 0 0 0
gnv 75 45 73 45 0 0 0 0
ocf 75 44 74 45 0 0 0 0

Jax watches warnings advisories
Fl... None.

Ga... None.

Am... Small craft advisory until 11 am edt 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.

Hess zibura


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FRDF1 - 8720030 - Fernandina Beach, FL 5 mi34 min SW 1 G 1.9 62°F1017.2 hPa
41112 - Offshore Fernandina Beach, FL (132) 14 mi52 min 61°F4 ft
BLIF1 23 mi34 min W 4.1 G 5.1 51°F 1017.7 hPa50°F
MYPF1 - 8720218 - Mayport (Bar Pilots Dock), FL 23 mi34 min W 4.1 G 5.1 62°F1016.5 hPa
LTJF1 24 mi34 min 51°F 45°F
SAXG1 - Sapelo Island Reserve, GA 50 mi82 min S 1.9 44°F 1016 hPa (-0.0)43°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 59 mi32 min W 5.8 G 7.8 57°F 61°F4 ft1015.5 hPa (-0.3)52°F

Wind History for Fernandina Beach, FL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Fernandina Beach Municipal Airport, FL9 mi27 minW 510.00 miFair46°F40°F82%1016.6 hPa
Jacksonville International Airport, FL17 mi26 minN 010.00 miFair41°F37°F89%1016.6 hPa
Mayport Naval Station - Adm David L. McDonald Field, FL24 mi30 minW 410.00 miA Few Clouds52°F42°F69%1016.6 hPa

Wind History from JAX (wind in knots)
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Last 24hrN8N9NE7N8N7NE6N6N9E7E8E7E5SE3CalmCalmCalmCalmCalmCalmCalmW5CalmCalmCalm
1 day agoN7NE15
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2 days agoN7N6N9NE11N13NE10NE9E5E6E6NE4CalmCalmN4CalmCalmSW3CalmN6N8N8N5N5N5

Tide / Current Tables for St. Marys, St. Marys River, Florida
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St. Marys
Click for Map
Thu -- 04:14 AM EDT     -1.44 feet Low Tide
Thu -- 07:29 AM EDT     Sunrise
Thu -- 08:06 AM EDT     Moonset
Thu -- 10:38 AM EDT     7.18 feet High Tide
Thu -- 04:36 PM EDT     -1.28 feet Low Tide
Thu -- 07:38 PM EDT     Sunset
Thu -- 08:33 PM EDT     Moonrise
Thu -- 11:05 PM EDT     7.27 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.63.61.4-0.5-1.4-1.10.32.34.3677.16.24.52.30.3-1-1.2-0.11.63.65.46.77.3

Tide / Current Tables for St. Johns River Entrance, Florida Current
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St. Johns River Entrance
Click for Map
Thu -- 01:52 AM EDT     -2.60 knots Max Ebb
Thu -- 05:38 AM EDT     0.00 knots Slack
Thu -- 07:28 AM EDT     Sunrise
Thu -- 08:06 AM EDT     Moonset
Thu -- 08:19 AM EDT     2.70 knots Max Flood
Thu -- 11:24 AM EDT     -0.00 knots Slack
Thu -- 02:10 PM EDT     -2.59 knots Max Ebb
Thu -- 05:55 PM EDT     0.00 knots Slack
Thu -- 07:37 PM EDT     Sunset
Thu -- 08:32 PM EDT     Moonrise
Thu -- 08:40 PM EDT     2.74 knots Max Flood
Thu -- 11:50 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.6-2.4-2.6-2.4-1.9-0.90.51.92.72.51.90.6-1-2.2-2.6-2.5-2-1.20.11.62.62.72.21.2

Weather Map and Satellite Images
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wmap_A
GOES 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 (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 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.