Wednesday, May24, 2017 L-36.com


Marine Weather and Tides
St. Marys, GA

Version 3.4
What's New / NOTES
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 6:24AMSunset 8:21PM Wednesday May 24, 2017 9:28 AM EDT (13:28 UTC) Moonrise 4:40AMMoonset 6:09PM Illumination 1% Phase: Waning Crescent; Moon at 28 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- 702 Am Edt Wed May 24 2017
.small craft advisory in effect through Thursday afternoon...
Today..South southwest winds 20 to 25 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 5 seconds. Inland waters choppy. Showers and Thunderstorms.
Tonight..West southwest winds 20 to 25 knots with gusts to around 35 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 6 seconds. Inland waters choppy. Showers and Thunderstorms likely through the night.
Thursday..West winds 15 to 20 knots. Seas 2 to 4 feet. Dominant period 4 seconds. Inland waters choppy.
Thursday night..West winds 10 to 15 knots. Seas 2 to 3 feet. Dominant period 3 seconds increasing to 8 seconds after midnight. Inland waters a light chop.
Friday..West winds 5 to 10 knots becoming south southeast in the afternoon. Seas 1 to 2 feet. Inland waters a light chop.
Friday night..South winds 10 to 15 knots becoming southwest after midnight. Seas 2 to 3 feet. Inland waters a moderate chop.
Saturday..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.
Saturday night..Southwest winds 10 to 15 knots. Seas 2 to 3 feet. Inland waters a moderate chop.
Sunday..Southwest winds 10 to 15 knots. Seas 2 to 3 feet. Inland waters a light chop.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 702 Am Edt Wed May 24 2017
Synopsis.. Waves of showers and storms will move across area waters through tonight...ahead of an approaching strong cold front. This front will cross our coastal waters late tonight. Occasional wind gusts to gale force are expected this evening through Thursday morning. Weak high pressure will build over our area from the west Thursday night and Friday...allowing for winds and seas to decrease. High pressure will build to the southeast over the weekend into early next week.

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 240744
afdjax
area forecast discussion
national weather service jacksonville fl
344 am edt Wed may 24 2017

Locally heavy rainfall and severe storms possible today...

Near term through tonight
A line of showers and storms were redeveloping across levy county
to southern duval northern st johns county early this morning.

Expect an area 50 miles north south of a line from just south of
gainesville to jacksonville beach to be the focus for heavy
rainfall this morning into the afternoon. Storms are fast moving,
but training of cells and high rainfall rates could lead to
localized flooding, especially in the area mentioned above.

Thought about a flood watch, but this rainfall is much needed,
with streams, creeks, rivers and lakes well below normal. Hrrr
shows helicity increasing along the gulf coast around daybreak as
winds back to the south, and could see isolated tornadoes,
especially in the western areas towards marion, alachua, and
gilchrist counties. Widespread rainfall amounts of 2-3 inches can
be expected across much of northeast florida through tonight, and
around 1 inch across much of southeast georgia. Locally higher
amounts are possible, especially where training bands set up.

It is a very complex scenario for severe weather today as showers
and storms will be ongoing across northeast florida this morning,
leading to lower instability there. Southwesterly flow will
strengthen ahead of the upper trough, with low level jet of 40-50
knots across the region this afternoon. Breezy to windy conditions
are expected, even outside of storms, with winds easily mixing
down to the surface in storms. So, the main threat looks to be
damaging winds in excess of 60 mph with multiple rounds of
convection across the region through the day and into the evening.

Temperatures aloft will cool as the trough approaches late this
afternoon, and some drier air aloft may also move into the region,
which could lead to large hail ahead of the front. This matches
well with the slight risk that our entire region is under for
today. Temperatures are tricky today, as areas that see some
clearing could quickly warm up, but kept temperatures down in the
upper 70s to lower 80s due to expected cloud cover and storms.

Showers and storms will begin to push east of the region this
evening, with drying first across southeast georgia, and then
storms winding down across the southeast portion of the region
around midnight tonight. Much drier air will move into the region
overnight, with dewpoints falling into the upper 50s across inland
southeast georgia and the lower 60s across the rest of the region
by the morning. Overnight lows will be cooler in the lower 60s
across the interior and the mid 60s for the coastal areas and
north central florida.

Short term Thursday through Friday ...

the upper trough axis swings into the area during the morning and
shifts east of the region by Thursday afternoon, with the surface
cold front well ahead pushing east-southeast through the southern
tier zones by daybreak Thursday. The heavy rainfall threat will
also end across north central florida early Thursday morning
behind the front. Thursday will be a dry day with a 15 to 20 mph
westerly flow. Drier air will filter into the region through the
day as the cold front pushes southward, with much more pleasant
dewpoints in the 50s areawide by afternoon. Thursday night and
Friday high pressure will build in over the region with clear and
dry conditions. Friday morning lows will be cooler in the
mid upper 50s well inland and the low to mid 60s along the coast,
intercoastal and st. Johns river basin which is around 5 degrees
below normal. Highs Friday are forecast to also be cooler, but
nearly or slightly above normal, in the mid to upper 80s.

Long term Friday night through Wednesday
Temperatures will moderate this weekend as an upper level ridge
over the gulf of mexico builds into the region. Highs will climb
into the lower to mid 90s inland with upper 80s to near 90 at the
coast. Lows Friday night will be in the mid 60s inland to lower
70s coast, warming Saturday night into the upper 60s inland to mid
70s coast with a light southwesterly wind. High pressure will
move offshore through early next week with a return flow and
warming temperatures. High pressure ridge offshore of florida and
a strong upper trough digging across the northern plains upper
midwest occurs memorial day creating an increasingly zonal flow
across the area, especially ga. Late during memorial day, rain
chances begin to increase, mainly north of i-10 where pops will be
25 percent near i-10 to 35 percent near the altamaha by
afternoon, with slight chances south of i-10. Tuesday and
Wednesday next week should see a return to afternoon and evening
thunderstorms along the western edge of the ridge. The next
frontal system begins to make its approach on Tuesday with
enhanced chances of precipitation Tuesday night and Wednesday.

Aviation
Convection was redeveloping in an area from near kgnv through the
duval TAF sites. Expect this to be the corridor of heavy showers
and thunderstorms with gusty winds and restrictions through much
of the day.

Marine
Waves of showers and storms will push through the waters through
tonight ahead of a cold front. West southwesterly flow will
continue to increase today ahead of a strong trough of low
pressure. Nearshore, winds will increase to 20-25 knots. Beyond
20nm offshore, winds will increase to 20-25 knots this morning,
then 25-30 knots this evening with a few gusts to gale force. A
cold front will push through the waters before daybreak on
Thursday, and then weak high pressure will build across central
florida through the end of the week with diminishing winds. High
pressure will build to the southeast over the weekend into early
next week.

Rip currents: low risk of rip currents through Thursday.

Fire weather
Wet pattern in store through tonight. Will have to scrutinize
localized precip pattern through tonight. Thursday is looking like
the next relatively dry afternoon with low rh values and gusty
winds. So will have to watch to see what the precipitation pattern
looks like to determine the threat level post frontal on
Thursday. On Friday, winds come down while min rh values remain in
the 30 to 35 percent range.

Preliminary point temps pops
Amg 80 62 79 58 80 50 0 0
ssi 80 68 81 65 80 50 10 0
jax 80 64 83 62 100 60 10 0
sgj 81 65 83 64 100 70 10 0
gnv 79 64 82 59 100 70 10 0
ocf 81 67 82 60 100 80 20 0

Jax watches warnings advisories
Fl... None.

Ga... None.

Am... Small craft advisory until 2 pm edt Thursday 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-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.

Cordero kennedy peterson


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FRDF1 - 8720030 - Fernandina Beach, FL 5 mi40 min S 6 G 8.9 77°F 79°F1007 hPa
41112 - Offshore Fernandina Beach, FL (132) 14 mi28 min 79°F3 ft
NFDF1 22 mi40 min S 5.1 G 8 76°F 1006.7 hPa
MYPF1 - 8720218 - Mayport (Bar Pilots Dock), FL 23 mi40 min SSW 8 G 12 75°F 79°F1006.7 hPa
DMSF1 23 mi40 min 81°F
BLIF1 23 mi40 min S 8 G 12 75°F 1007 hPa74°F
LTJF1 24 mi40 min 76°F 71°F
JXUF1 26 mi40 min 81°F
BKBF1 37 mi40 min S 11 G 16 76°F 81°F
SAXG1 - Sapelo Island Reserve, GA 50 mi88 min SSW 12 75°F 1006 hPa (+0.0)73°F
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 59 mi38 min SSW 18 G 19 78°F 78°F4 ft1005.3 hPa (-0.5)71°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 mi53 minS 610.00 miMostly Cloudy77°F71°F83%1006.1 hPa
Jacksonville, Jacksonville International Airport, FL17 mi32 minSSE 75.00 miLight Rain Fog/Mist74°F73°F97%1005.8 hPa
Mayport, Mayport Naval Station, Adm David L. McDonald Field, FL24 mi36 minSSW 910.00 miLight Rain76°F73°F91%1006.3 hPa

Wind History from JAX (wind in knots)
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1 day agoSW6W7CalmS66SW7SE11SE11
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SE6S6SE5SE3S4S4S5S7S7SW6S4S4SW4SW6S5SW8
2 days agoS6W9W63E3S6W5E11E12
G16
SE11S6N5CalmCalmCalmE3SW4S5CalmCalmCalmCalmS3SW5

Tide / Current Tables for St. Marys, St. Marys River, Florida
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St. Marys
Click for Map
Wed -- 02:36 AM EDT     -0.25 feet Low Tide
Wed -- 05:39 AM EDT     Moonrise
Wed -- 06:26 AM EDT     Sunrise
Wed -- 08:47 AM EDT     6.60 feet High Tide
Wed -- 02:48 PM EDT     -0.81 feet Low Tide
Wed -- 07:08 PM EDT     Moonset
Wed -- 08:19 PM EDT     Sunset
Wed -- 09:15 PM EDT     7.79 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.81.1-0.1-0.20.82.33.95.46.46.664.62.70.9-0.4-0.80.11.83.85.77.17.87.66.4

Tide / Current Tables for St. Johns River Entrance, Florida Current
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St. Johns River Entrance
Click for Map
Wed -- 04:03 AM EDT     0.00 knots Slack
Wed -- 05:39 AM EDT     Moonrise
Wed -- 06:26 AM EDT     Sunrise
Wed -- 06:33 AM EDT     2.09 knots Max Flood
Wed -- 09:31 AM EDT     -0.00 knots Slack
Wed -- 12:10 PM EDT     -2.55 knots Max Ebb
Wed -- 04:00 PM EDT     0.01 knots Slack
Wed -- 06:56 PM EDT     3.03 knots Max Flood
Wed -- 07:07 PM EDT     Moonset
Wed -- 08:18 PM EDT     Sunset
Wed -- 10:11 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-2.5-2.3-1.8-1.1-0.11.1221.50.6-0.7-1.9-2.5-2.4-1.9-1.101.42.632.61.60.3-1.3

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 (9,2,3,4)
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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.