Friday, March24, 2017 L-36.com


Marine Weather and Tides
St. Marks, FL

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 7:33AMSunset 7:52PM Friday March 24, 2017 4:04 AM EDT (08:04 UTC) Moonrise 4:16AMMoonset 3:33PM Illumination 11% Phase: Waning Crescent; Moon at 26 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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GMZ730 Apalachee Bay Or Coastal Waters From Keaton Beach To Ochlockonee River Fl Out To 20 Nm- Coastal Waters From Suwannee River To Keaton Beach Out 20 Nm- 344 Am Edt Fri Mar 24 2017
Today..East winds 10 to 15 knots becoming southeast 5 to 10 knots in the afternoon. Seas 1 to 2 feet. Dominant period 3 seconds. Protected waters a light to moderate chop.
Tonight..East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 3 seconds. Protected waters a light to moderate chop.
Saturday..Southeast winds 10 to 15 knots becoming south 5 to 10 knots late in the afternoon. Seas 1 to 3 feet. Dominant period 3 seconds. Protected waters a light to moderate chop.
Saturday night..South winds around 5 knots becoming southeast 10 to 15 knots in the late evening. Seas 1 to 2 feet. Dominant period 3 seconds. Protected waters a light to moderate chop. Slight chance of rain after midnight.
Sunday..South winds 10 to 15 knots. Seas 1 to 2 feet. Dominant period 3 seconds. Protected waters a light to moderate chop.
Sunday night..Southwest winds 5 to 10 knots becoming southeast 5 to 10 knots in the late evening. Seas 1 to 2 feet. Protected waters mostly smooth.
Monday..South winds 10 knots. Seas 1 to 2 feet. Protected waters a light chop.
Monday night..South winds 5 to 10 knots. Seas 1 foot or less. Protected waters mostly smooth.
Tuesday..Southwest winds 10 knots. Seas 1 to 2 feet. Protected waters a light chop. Slight chance of showers and Thunderstorms.
GMZ700 Synopsis For The Suwannee River To Destin Out To 60 Nm 344 Am Edt Fri Mar 24 2017
Synopsis.. Strong easterly winds will continue through this afternoon. A small craft advisory remains in effect until 5pm edt for most of the coastal waters. Winds will remain elevated through Saturday evening.

7 Day Forecast for Marine Location Near St. Marks, FL
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location: 30.08, -84     debug


Area Discussion for -
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Fxus62 ktae 240537
afdtae
area forecast discussion
national weather service tallahassee fl
137 am edt Fri mar 24 2017

Aviation [through 06z Saturday]
MVFR-vfr clouds continue to develop and move across the area.

MainlyVFR through the period with tempo MVFR cigs/vsbys at
dhn/aby/vld through mid morning.VFR afterwards. East to east-
southeast winds will rule this period with a few gusts possible
Friday up to 20 knots.

Prev discussion [842 pm edt]
Near term [through tonight]
The 5 pm regional surface analysis showed a strong ridge along the
southeast coast, and a weakening, quasi-stationary front near and
along the ga-al border. There were still a few showers near this
boundary in the fl panhandle, but these will dissipate over the
next few hours. No major changes were made to the afternoon
forecast package.

Short term [Friday through Saturday night]
An upper level low located over the great plains will move
northeastward moving over illinois on Saturday. The associated
cold front near the southeast with precipitation out ahead of the
frontal boundary. Showers are expected to reach our CWA Saturday
evening/night and will remain mostly to the west of the
apalachicola-chattahoochee river line. SPC has a marginal risk
for our western counties for Saturday night due to the combination
of marginal shear and low instability. The line of showers and
isolated storms also show a weakening trend and will likely
dissipate Saturday night/Sunday morning. Highs will be in upper
70s to low 80s and lows will be in the upper 50s to low 60s.

Long term [Sunday through Thursday]
A second shortwave will be moving through the plains on Sunday,
and will move off the mid-atlantic coast Wednesday afternoon. At
the surface, an associated cold front will move through the tri-
state region by Tuesday night. Rain chances will increase ahead of
the front starting on Monday. Behind the front, deep layer ridging
will prevail for the remainder of the period. Afternoon highs and
overnight lows will remain about 10 degrees above normal for this
time of year.

Marine
Advisory conditions under easterly flow will overspread the
northeast gulf starting this evening. Winds and seas will fall
below advisory levels by late tomorrow afternoon, though
cautionary conditions will persist through Saturday. By Sunday,
light winds and low seas are expected to prevail through mid-week
next week.

Fire weather
Aside from possible high dispersion Friday afternoon and a
continuation of dry weather, there are no other fire weather
concerns.

Hydrology
Less than an inch of rain on average is expected across the region
over the next 7 days. Thus, flooding is not expected.

Preliminary point temps/pops
Tallahassee 80 57 78 58 80 / 0 0 10 20 20
panama city 75 63 73 64 74 / 0 0 30 30 20
dothan 79 58 78 60 79 / 0 0 30 40 30
albany 79 57 80 60 81 / 0 0 20 20 30
valdosta 79 56 80 59 81 / 0 0 10 20 20
cross city 78 55 81 58 80 / 0 0 0 10 10
apalachicola 74 62 73 63 74 / 0 0 10 20 20

Tae watches/warnings/advisories
Fl... None.

Ga... None.

Al... None.

Gm... Small craft advisory until 5 pm edt this afternoon for coastal
waters from ochlockonee river to apalachicola fl out to 20
nm-coastal waters from apalachicola to destin fl out 20 nm-
waters from suwannee river to apalachicola fl from 20 to 60
nm-waters from apalachicola to destin fl from 20 to 60 nm.

Near term... Fournier
short term... Harrigan/chaney
long term... Harrigan
aviation... Scholl
marine... Harrigan
fire weather... Barry
hydrology... Harrigan


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SHPF1 - SHP - Shell Point, FL 15 mi130 min ENE 5.1 G 9.9 62°F 1027.3 hPa
KTNF1 - Keaton Beach, FL 28 mi64 min ENE 6 G 9.9 58°F 1027.4 hPa (+0.0)
APXF1 - Apalachicola Reserve, FL 51 mi79 min E 11 65°F 59°F

Wind History for Apalachicola, FL
(wind in knots)    EDIT      (on/off)   Help
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E11
G17
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W3
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SW3
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G12
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G17
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G20
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W3
G6
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W6
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G8

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Perry-Foley, Perry-Foley Airport, FL23 mi69 minN 010.00 miFair57°F54°F90%1028.4 hPa

Wind History from 40J (wind in knots)
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Last 24hrNE3NE3NE5NE4NE5NE6E7E8
G14
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G17
E7NE10
G15
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E7E4E5E5E5NE4NE3NE5
1 day agoW8W8
G17
W6SW3CalmW5NW6CalmCalmNW5NW7
G15
W7SW11SW9SW7W6SW4CalmCalmE6E4E4E4E4
2 days agoCalmCalmCalmCalmCalmW5W9W8W5SW9SW11
G16
SW11SW12
G19
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SW14SW11SW10
G14
SW9
G15
SW8SW6W4SW4SW4SW6

Tide / Current Tables for Aucilla River entrance, Florida
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Aucilla River entrance
Click for Map
Fri -- 12:11 AM EDT     2.57 feet High Tide
Fri -- 05:16 AM EDT     Moonrise
Fri -- 06:59 AM EDT     -0.05 feet Low Tide
Fri -- 07:34 AM EDT     Sunrise
Fri -- 01:28 PM EDT     2.85 feet High Tide
Fri -- 04:32 PM EDT     Moonset
Fri -- 07:10 PM EDT     1.04 feet Low Tide
Fri -- 07:50 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.62.52.21.71.10.50.1-0.10.10.61.21.92.52.82.82.52.11.61.211.11.41.92.3

Tide / Current Tables for St. Marks River Entrance, Florida
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St. Marks River Entrance
Click for Map
Fri -- 12:08 AM EDT     2.76 feet High Tide
Fri -- 05:16 AM EDT     Moonrise
Fri -- 06:54 AM EDT     -0.06 feet Low Tide
Fri -- 07:35 AM EDT     Sunrise
Fri -- 01:25 PM EDT     3.06 feet High Tide
Fri -- 04:33 PM EDT     Moonset
Fri -- 07:05 PM EDT     1.13 feet Low Tide
Fri -- 07:50 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.82.72.31.81.10.50.1-0.10.10.71.42.12.7332.72.21.71.31.11.21.622.5

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 (4,6,7,8)
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Ground Weather Radar Station Tallahassee, FL
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weather_mapweather_map weather_map

Gulf Stream Current


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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.