Saturday, September21, 2019 L-36.com


Marine Weather and Tides
St. Marks, 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 7:23AMSunset 7:36PM Saturday September 21, 2019 9:27 PM EDT (01:27 UTC) Moonrise 11:39PMMoonset 1:01PM Illumination 46% Phase: Third Quarter Moon; Moon at 23 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 Mexico Beach To Okaloosa Walton County Line Fl Out 20 Nm- Coastal Waters From Mexico Beach To Apalachicola Fl Out 20 Nm- Coastal Waters From Ochlockonee River To Apalachicola Fl Out To 20 Nm- 208 Pm Edt Sat Sep 21 2019 /108 Pm Cdt Sat Sep 21 2019/
.small craft should exercise caution...
Tonight..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 4 seconds. Protected waters choppy.
Sunday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet subsiding to 2 to 3 feet. Dominant period 3 seconds in the afternoon. Protected waters a light chop.
Sunday night..East winds 10 knots. Seas 2 to 3 feet. Dominant period 4 seconds. Protected waters a light chop.
Monday..East winds 10 knots becoming southeast 5 to 10 knots late in the afternoon. Seas 2 to 3 feet. Dominant period 4 seconds. Protected waters a light chop.
Monday night..Southwest winds around 5 knots early in the evening becoming light and variable winds, then becoming northwest 5 to 10 knots after midnight. Seas 1 to 2 feet. Dominant period 3 seconds. Protected waters smooth.
Tuesday..Northwest winds 5 to 10 knots becoming west 10 knots in the afternoon. Seas 1 to 2 feet. Dominant period 3 seconds. Protected waters a light chop.
Tuesday night..West winds 10 knots. Seas 1 to 2 feet. Dominant period 3 seconds. Protected waters a light chop.
Wednesday..West winds 5 to 10 knots becoming southwest 5 to 10 knots in the afternoon. Seas 1 foot. Dominant period 3 seconds. Protected waters mostly smooth.
Wednesday night..West winds 5 to 10 knots. Seas 1 foot. Dominant period 3 seconds. Protected waters mostly smooth.
Thursday..South winds 5 to 10 knots. Seas 1 foot. Protected waters mostly smooth.
GMZ700 Synopsis For The Suwannee River To Okaloosa-walton County Line Out To 60 Nm 208 Pm Edt Sat Sep 21 2019
Synopsis.. Strong easterly flow over the coastal waters to continue through tonight, with winds around 20 knots, gusting to 25 knots. As a result, a small craft advisory remains in effect for the waters beyond 20 nautical miles through Sunday morning. Elsewhere, small craft should exercise caution. Tranquil boating conditions are expected to return on Monday and continue through the forecast period.


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 211817
afdtae
area forecast discussion
national weather service tallahassee fl
217 pm edt Sat sep 21 2019

Near term [through today]
High pressure over the mid-atlantic states is producing predominantly
easterly winds over our area on its southern periphery. This pattern
will keep conditions dry and near seasonal temperatures, with highs
in the upper 80s and around 90 across much of our area this afternoon.

Mostly clear skies and lows in the mid- to-upper 60s tonight.

Short term [tonight through Monday]
Fair weather is expected during the short term. Deep layer ridging
gradually shifts west of the area, which causes the low-level flow to
back from east to north on Monday. Overall, sunny and dry. Conditions
may become more favorable for the development of some patchy fog by
Monday morning, but coverage looks limited at this time. Temperatures
will range from the upper 80s to lower 90s on Sunday and Monday, a
few degrees above normal.

Long term [Monday night through Saturday]
A weak boundary approaches from the north on Tuesday and stalls
across the area on Wednesday. Despite the boundary and narrow band
of higher precipitable water, deep layer ridging remains dominant
across the area, so any lift will be limited. Cannot rule out an
isolated shower mainly north of i-10 on Tuesday and Wednesday, but
it remains stable enough to inhibit any thunder at this point.

The pattern looks to become more favorable for the development of
patchy fog on Tuesday morning where skies are clear, given sounding
profiles. Will hold off mentioning in the forecast for now, given
confidence is not high.

With the gradient weakening on Tuesday and a more robust onshore
flow developing, humidity levels will begin to increase mainly to
the south of i-10, and persist into Saturday. Temperatures also
moderate with the area under the influence of a deep layer ridge,
remaining anomalously warm in the low to mid 90s thru Saturday.

This could lead to heat indices up to around 105 at times in the
fl panhandle through the period.

Precip chances look minimal Thursday through Saturday, with a dry
stretch of weather expected.

Aviation
[through 18z Sunday]
easterly flow andVFR conditions through the period. East winds
through this evening will gust around 15 knots at times, veering
southeast at ecp by late this afternoon, decreasing to around 5
knots overnight. There is a potential for low clouds at tlh and
vld Sun morning, but ceilings are expected to remainVFR attm.

Marine
Strong easterly flow over the coastal waters to continue through
tonight, with winds around 20 knots, gusting to 25 knots. As a
result, a small craft advisory remains in effect for the waters
beyond 20 nautical miles through Sunday morning. Elsewhere, small
craft should exercise caution. Tranquil boating conditions are
expected to return on Monday and continue through the forecast
period.

Fire weather
Hazardous fire weather conditions are not expected over the next
several days.

Hydrology
A dry stretch of weather is expected to continue over the next
week with above average temperatures. Portions of the region
are at less than 50 percent of normal precipitation over the
past 30 days, and are experiencing abnormally dry conditions to
moderate drought in some cases. Most local rivers also have
stream flows below normal levels. No flooding issues expected.

Spotter information statement
Spotter activation is not requested. However, spotters are always
encouraged to safely report significant weather conditions when they
occur by calling the office or tweeting us @nwstallahassee.

Preliminary point temps pops
Tallahassee 65 91 66 93 67 0 0 0 0 0
panama city 69 88 70 90 72 0 0 0 0 0
dothan 63 89 64 92 66 0 0 0 0 0
albany 64 89 65 91 67 0 0 0 0 0
valdosta 64 89 64 91 65 0 0 0 0 0
cross city 66 90 66 90 67 0 0 0 0 0
apalachicola 70 85 71 88 72 0 0 0 0 0

Tae watches warnings advisories
Fl... High rip current risk until midnight edt 11 pm cdt tonight for
coastal bay-coastal franklin-south walton.

Ga... None.

Al... None.

Gm... Small craft advisory until 2 pm edt 1 pm cdt this afternoon
for apalachee bay or coastal waters from keaton beach to
ochlockonee river fl out to 20 nm-coastal waters from
ochlockonee river to apalachicola fl out to 20 nm-coastal
waters from mexico beach to apalachicola fl out 20 nm-
coastal waters from mexico beach to okaloosa walton county
line fl out 20 nm.

Small craft advisory until 11 am edt 10 am cdt Sunday for
coastal waters from suwannee river to keaton beach fl out
20 nm-waters from suwannee river to apalachicola fl from 20
to 60 nm-waters from apalachicola to mexico beach fl from
20 to 60 nm-waters from mexico beach to okaloosa walton
county line fl from 20 to 60 nm.

Near term... Ig
short term... Lf
long term... Lf
aviation... Lf
marine... Lf
fire weather... Harrigan
hydrology... Lf


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SHPF1 - SHP - Shell Point, FL 15 mi94 min ENE 2.9 G 6 83°F 1019.5 hPa
KTNF1 - Keaton Beach, FL 28 mi28 min ENE 8 G 9.9 78°F 1021.3 hPa (+1.3)65°F
APXF1 - Apalachicola Reserve, FL 51 mi103 min E 2.9 1021 hPa

Wind History for Apalachicola, FL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Perry-Foley, Perry-Foley Airport, FL23 mi53 minE 710.00 miOvercast79°F64°F62%1021.3 hPa

Link to 5 minute data for K40J

Wind History from 40J (wind in knots)
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Last 24hrE3E4E3NE4E3E6CalmNE3NE4NE4NE4NE6NE7E9E6E5NE7
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Tide / Current Tables for Aucilla River entrance, Florida
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Aucilla River entrance
Click for Map
Sat -- 12:43 AM EDT     1.58 feet Low Tide
Sat -- 06:21 AM EDT     3.32 feet High Tide
Sat -- 07:23 AM EDT     Sunrise
Sat -- 01:55 PM EDT     0.66 feet Low Tide
Sat -- 02:01 PM EDT     Moonset
Sat -- 07:34 PM EDT     Sunset
Sat -- 08:52 PM EDT     2.76 feet High Tide
Sat -- 10:43 PM EDT     Last Quarter
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.61.61.82.22.73.13.33.332.521.510.70.70.81.11.522.42.72.82.62.4

Tide / Current Tables for St. Marks River Entrance, Florida
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St. Marks River Entrance
Click for Map
Sat -- 12:38 AM EDT     1.72 feet Low Tide
Sat -- 06:18 AM EDT     3.57 feet High Tide
Sat -- 07:24 AM EDT     Sunrise
Sat -- 01:50 PM EDT     0.72 feet Low Tide
Sat -- 02:02 PM EDT     Moonset
Sat -- 07:34 PM EDT     Sunset
Sat -- 08:49 PM EDT     2.96 feet High Tide
Sat -- 10:43 PM EDT     Last Quarter
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.81.722.42.93.33.63.53.22.72.11.51.10.80.70.91.21.72.22.62.932.82.6

Weather Map
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wmap_A
GEOS Local Image of    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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Wind Forecast for (21,6,7,8)
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Ground Weather Radar Station Tallahassee, FL
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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.