Thursday, August17, 2017 L-36.com


Marine Weather and Tides
St. Marys, GA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:53AMSunset 8:06PM Thursday August 17, 2017 7:26 AM EDT (11:26 UTC) Moonrise 1:33AMMoonset 3:39PM Illumination 23% Phase: Waning Crescent; Moon at 25 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- 257 Am Edt Thu Aug 17 2017
Today..West southwest winds 5 to 10 knots becoming south southeast 10 to 15 knots in the afternoon. Seas 1 to 2 feet. Dominant period 7 seconds. Inland waters a light chop. A chance of showers and Thunderstorms in the afternoon.
Tonight..Southwest winds 10 to 15 knots. Seas 2 to 3 feet. Dominant period 4 seconds. Inland waters a light chop. A chance of showers and Thunderstorms in the evening.
Friday..South southwest winds 5 to 10 knots becoming south southeast 10 to 15 knots in the afternoon. Seas 2 to 3 feet. Dominant period 8 seconds. Inland waters a light chop. A chance of showers and Thunderstorms.
Friday night..South southwest winds 10 to 15 knots. Seas 2 to 3 feet. Dominant period 4 seconds. Inland waters a light chop. A chance of showers and Thunderstorms.
Saturday..South southwest winds 5 to 10 knots becoming south southeast 10 to 15 knots in the afternoon. Seas 2 to 3 feet. Inland waters a light chop. A chance of showers and Thunderstorms.
Saturday night..South winds 10 to 15 knots. Seas 2 to 4 feet. Inland waters a moderate chop. A chance of showers and Thunderstorms.
Sunday..South southeast winds 5 to 10 knots. Seas 2 to 3 feet. Inland waters a light chop. A chance of showers and Thunderstorms.
Sunday night..South southeast winds 5 to 10 knots. Seas 2 to 3 feet. Inland waters a light chop. A chance of showers and Thunderstorms.
Monday..Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Inland waters a light chop. A chance of showers and Thunderstorms.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 257 Am Edt Thu Aug 17 2017
Synopsis.. Mainly offshore winds are expected through Friday, increasing to near 15 knots each evening. Very weak onshore flow can be expected near the coast during the mid afternoon hours. High pressure will then build northward this weekend, resulting in a more southerly wind flow on Saturday and onshore by Sunday afternoon, with the sea breeze developing earlier in the day in coastal locations.

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 170701
afdjax
area forecast discussion
national weather service jacksonville fl
301 am edt Thu aug 17 2017

Hot and humid with heat indices near 105 degrees today...

Slow and erratic storm motion will promote locally heavy
rainfall threat late this afternoon and evening...

Near term today-tonight
Today... High pressure aloft with very moist airmass in place will
support afternoon high temps inland in the middle 90s and lower
90s at the coast. This will produce heat indices in the 104-108
range and just below heat advisory criteria. Steering flow out of
the w-sw will hold off atlc sea breeze until early afternoon when
it will track inland to the i-95 corridor and st johns river basin
and kick off scattered to numerous showers and storms across NE fl
with less coverage across SE ga. Storm motion will be slow and
variable at less than 10 mph with erratic outflow boundaries
through the late afternoon hours helping to initiate more storms
into the early evening hours. Warm temps aloft will continue to
suppress severe storms, but strong storms with gusty downburst
winds and frequent lightning. The main story for much of the day
will be the high heat indices but after the scattered storms
develop and move slowly and tap into the deep tropical atmospheric
moisture with pwats still exceeding 2 inches expect locally heavy
rainfall threat in the strongest storms with main axis between the
i-95 and us 301 highway corridors with best chance of strong
storms with locally heavy rainfall from jacksonville southward
through the st johns river basin as erratic storms continue to
merge.

Tonight... Expect active early evening convection to start to fade
after sunset with convection becoming isolated by midnight then
ending during the overnight hours. Expect some convective debris
clouds into the overnight hours then becoming partly cloudy to
mostly clear towards morning. Muggy overnight lows will continue
with middle 70s inland and upper 70s near 80 along the coast.

Short term Friday through Saturday night... Upper ridge over the
area weakens on Friday as an inverted trough moves westward across
south fl. A very moist SW flow(pwats near 2.25") in the low and mid
levels will keep the seabreeze near the east coast with scattered to
numerous storms in the afternoon evening. Ridge starts to rebuild on
Saturday with scattered storms still expected due to high moisture
values across the area. Temperatures will be above average with pops
at or above average.

Long term Sunday through Wednesday... Subtropical high center to
the east will continue to expand westward across south ga and north
fl Sunday through Monday. The high will retrograde reaching the
central gulf coast by Wednesday. Dry mid level air will keep rain
coverage in the scattered category. The surface ridge will be just
north of the area providing an easterly flow with the east coast
seabreeze moving well inland. Temperatures will be a few degrees
above average with near average rain chances.

Aviation
Vfr this morning. Scattered storms possible at NE fl TAF sites
after 18z and have kept vcts mention for now with CIGS close to
3500 feet. Activity should fade after sunset (00z) withVFR conds
again tonight.

Marine
Mainly offshore flow 10-15 knots or less with seas 2-4 ft expected
the rest of the week, then as ridge axis builds north of the
region over the weekend expect winds to veer to the SE but
winds seas remain well below headline levels.

Rip currents: low risk in the mainly offshore flow with breakers
only 1-2 ft.

Preliminary point temps pops
Amg 95 76 94 75 40 20 30 20
ssi 91 79 90 77 40 20 40 40
jax 94 76 92 75 60 30 60 20
sgj 92 77 90 75 50 20 50 20
gnv 92 75 91 73 60 20 60 20
ocf 92 75 91 74 60 20 50 10

Jax watches warnings advisories
Fl... None.

Ga... None.

Am... None.

Hess zibura


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FRDF1 - 8720030 - Fernandina Beach, FL 5 mi39 min WSW 2.9 G 4.1 81°F 84°F1018.3 hPa
41112 - Offshore Fernandina Beach, FL (132) 14 mi57 min 83°F1 ft
NFDF1 22 mi39 min W 4.1 G 6 80°F 1018.6 hPa77°F
MYPF1 - 8720218 - Mayport (Bar Pilots Dock), FL 23 mi39 min WSW 5.1 G 5.1 81°F 83°F1018 hPa
DMSF1 23 mi39 min 86°F
BLIF1 23 mi39 min SW 5.1 G 6 82°F 1018.6 hPa82°F
LTJF1 24 mi39 min 81°F 77°F
JXUF1 26 mi39 min 87°F
BKBF1 37 mi39 min SW 2.9 G 4.1 80°F 87°F
SAXG1 - Sapelo Island Reserve, GA 50 mi87 min Calm 82°F 1016 hPa (+0.0)79°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 59 mi37 min WSW 7.8 G 9.7 84°F 84°F2 ft1016.4 hPa (+0.7)78°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 mi52 minW 310.00 miFair79°F75°F89%1016.9 hPa
Jacksonville International Airport, FL17 mi91 minN 010.00 miFair78°F77°F97%1017.1 hPa
Mayport Naval Station - Adm David L. McDonald Field, FL24 mi35 minWSW 510.00 miA Few Clouds81°F78°F91%1017.4 hPa

Wind History from JAX (wind in knots)
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Last 24hrW3W6W54W66NW633NW7W6S4SE7S4S8S3SW5W8W4SW3W3SW3CalmW3
1 day agoCalmW9NW6W7NW7W4NW8NW7W6W7W7W11W5W9SW7W6W3W4W3W3SW5W3W4W3
2 days agoSW4SW6SW5SW5SW6S7S7CalmSW6W5W7W6NW5CalmCalmW3SW4S5CalmS6SW3CalmCalmCalm

Tide / Current Tables for St. Marys, St. Marys River, Florida
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St. Marys
Click for Map
Thu -- 02:32 AM EDT     Moonrise
Thu -- 05:41 AM EDT     5.89 feet High Tide
Thu -- 06:53 AM EDT     Sunrise
Thu -- 11:50 AM EDT     -0.34 feet Low Tide
Thu -- 04:38 PM EDT     Moonset
Thu -- 06:25 PM EDT     6.97 feet High Tide
Thu -- 08:05 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.51.32.53.955.75.95.34.12.61.10-0.30.41.83.55.16.36.96.96.14.731.5

Tide / Current Tables for St. Johns River Entrance, Florida Current
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St. Johns River Entrance
Click for Map
Thu -- 01:05 AM EDT     0.00 knots Slack
Thu -- 02:32 AM EDT     Moonrise
Thu -- 03:27 AM EDT     1.74 knots Max Flood
Thu -- 06:34 AM EDT     -0.00 knots Slack
Thu -- 06:53 AM EDT     Sunrise
Thu -- 09:20 AM EDT     -2.18 knots Max Ebb
Thu -- 01:09 PM EDT     0.00 knots Slack
Thu -- 03:58 PM EDT     2.57 knots Max Flood
Thu -- 04:37 PM EDT     Moonset
Thu -- 07:23 PM EDT     -0.00 knots Slack
Thu -- 08:04 PM EDT     Sunset
Thu -- 10:02 PM EDT     -2.19 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1-0.111.71.61.20.5-0.5-1.6-2.2-2.1-1.8-1.2-0.21.12.22.62.21.60.5-0.8-1.9-2.2-2.1

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Southeast    EDIT
Geos

Wind Forecast for Jacksonville, FL (7,2,3,4)
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Ground Weather Radar Station Jacksonville, FL
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weather_mapweather_map weather_map

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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.