Saturday, August24, 2019 L-36.com


Marine Weather and Tides
St. Marks, FL

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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 7:08AMSunset 8:11PM Saturday August 24, 2019 5:07 PM EDT (21:07 UTC) Moonrise 12:10AMMoonset 2:11PM Illumination 32% Phase: Waning Crescent; Moon at 24 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- Coastal Waters From Suwannee River To Keaton Beach Fl Out 20 Nm- Waters From Mexico Beach To Okaloosa Walton County Line Fl From 20 To 60 Nm- Waters From Apalachicola To Mexico Beach Fl From 20 To 60 Nm- Waters From Suwannee River To Apalachicola Fl From 20 To 60 Nm- 238 Pm Edt Sat Aug 24 2019 /138 Pm Cdt Sat Aug 24 2019/
Tonight..Northwest winds 10 knots becoming north 10 knots after midnight. Seas 1 to 2 feet. Dominant period 4 seconds. Protected waters a light chop. Slight chance of showers and Thunderstorms through the night.
Sunday..Northeast winds 5 to 10 knots becoming southwest late in the afternoon. Seas 1 foot. Dominant period 4 seconds. Protected waters a light chop. Slight chance of showers and Thunderstorms in the morning, then chance of showers and Thunderstorms in the afternoon.
Sunday night..Southwest winds 5 to 10 knots becoming southeast 10 knots in the late evening. Seas 1 foot. Dominant period 4 seconds. Protected waters a light chop. Chance of showers and Thunderstorms.
Monday..Southwest winds 10 knots. Seas 1 foot. Dominant period 3 seconds. Protected waters a light chop. Chance of showers and Thunderstorms.
Monday night..Southwest winds 10 knots. Seas 1 foot. Dominant period 3 seconds. Protected waters a light chop. Slight chance of showers and Thunderstorms in the evening, then chance of showers and Thunderstorms after midnight.
Tuesday..West winds 10 to 15 knots. Seas 1 to 2 feet. Protected waters a light chop. Showers and Thunderstorms likely in the morning, then chance of showers and Thunderstorms in the afternoon.
Tuesday night..West winds 10 to 15 knots. Seas 1 to 2 feet. Protected waters a light chop. Chance of showers and Thunderstorms in the evening, then showers and Thunderstorms likely after midnight.
Wednesday..Northwest winds 15 knots. Seas 2 to 3 feet. Protected waters a moderate chop. Showers and Thunderstorms likely in the morning, then chance of showers and Thunderstorms in the afternoon.
Wednesday night..North winds 10 to 15 knots. Seas 2 to 3 feet. Protected waters a light chop. Chance of showers and Thunderstorms in the evening, then showers and Thunderstorms likely after midnight.
Thursday..North winds 10 to 15 knots. Seas 2 to 3 feet. Protected waters a light chop. Chance of showers and Thunderstorms.
GMZ700 Synopsis For The Suwannee River To Okaloosa-walton County Line Out To 60 Nm 238 Pm Edt Sat Aug 24 2019
Synopsis.. Light winds and low seas will continue outside of Thunderstorms through Tuesday night. Winds will increase slightly around Wednesday as the pressure gradient tightens. There will be daily chances for storms, which will peak in the late night and early morning hours.


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 241850
afdtae
area forecast discussion
national weather service tallahassee fl
250 pm edt Sat aug 24 2019

Near term [through tonight]
Already seeing a few showers and thunderstorms on the radar this
afternoon and will continue to see additional development. The
highest chances are across the inland areas through this evening.

Convection will linger into the first half of tonight and while
chances will decrease for the second half of the night, a few storms
will remain possible. Temperatures tonight will only fall into the
mid 70s, a few degrees above normal.

Short term [Sunday through Monday night]
At the mid and upper levels, a shortwave trough will dig into the
southern plains and amplify the patter on Sunday and then it will
swing into the southern ms valley on Monday. At the low levels,
we'll be situated to the northeast of weak ridging and to the west
of a weak low (invest 98l). Rich tropical moisture will remain on
tap over the tri-state area both days, with pw values hovering
around 2-2.5". This pattern, along with our diurnal seabreeze
circulation, should combine to make for active showers and
thunderstorms each afternoon and evening. Highs will be in the upper
80s to low 90s and lows will be in the low 70s.

Long term [Tuesday through Saturday]
The upper level shortwave will lift northeastward, while a series of
shortwave trough eject into the longwave trough to our north. This
will keep the upper level trough over just north of the area
basically through the period. Tropical moisture will continue to
influence the area through around Thursday. Thursday night Friday, a
much drier air mass (associated with a weak front) will attempt to
push into the region, but will likely be shunted back north over the
weekend. Highs will be in the upper 80s to low 90s and lows will be
in the low-mid 70s.

Aviation
[through 18z Sunday]
a few shra are beginning to develop across the aby to vld area.

Best chance for tsra this afternoon will be from dhn to aby to vld
and have included tempo groups for those sites. While tsra cannot be
ruled out at the other sites, chances are too low to mention in the
tafs at this time. There is some hint of lower CIGS (ifr) for
tomorrow morning across the dhn to aby to vld area and will have to
keep an eye on future guidance to see how things trends.

Marine
Light winds and low seas will continue outside of thunderstorms
through Tuesday night. Winds will increase slightly around Wednesday
as the pressure gradient tightens. There will be daily chances for
storms, which will peak in the late night and early morning hours.

Fire weather
Moist conditions and light winds will offset any fire weather
concerns over the next several days.

Hydrology
The steinhatchee river near cross city continues to fall through
minor flood stage. No other area river sites are in flood stage.

Rainfall accumulations from scattered thunderstorms over the next
week is expected to be around 2-3", with locally higher values.

Widespread flooding is not anticipated, but isolated heavy rainfall
could lead to local flooding.

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 75 92 73 90 73 30 60 60 60 20
panama city 77 89 75 87 76 20 50 40 40 40
dothan 74 89 72 87 72 40 70 70 70 40
albany 74 87 73 88 73 50 50 60 70 40
valdosta 75 89 72 89 72 40 60 50 60 40
cross city 75 92 74 90 74 30 50 50 40 20
apalachicola 78 89 77 87 76 20 40 30 40 30

Tae watches warnings advisories
Fl... None.

Ga... None.

Al... None.

Gm... None.

Near term... Fieux
short term... Nguyen
long term... Nguyen
aviation... Fieux
marine... Nguyen
fire weather... Barry
hydrology... Nguyen


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SHPF1 - SHP - Shell Point, FL 15 mi133 min ENE 4.1 G 8.9 91°F 55°F1013.9 hPa
KTNF1 - Keaton Beach, FL 28 mi67 min W 8 G 9.9 90°F 1013.4 hPa (-2.0)80°F
APXF1 - Apalachicola Reserve, FL 51 mi82 min WSW 8 1015 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 mi12 minESE 310.00 miMostly Cloudy94°F75°F55%1012.9 hPa

Link to 5 minute data for K40J

Wind History from 40J (wind in knots)
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Last 24hrW6W4W4CalmCalm----Calm--CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNE6N7NE5CalmE3
1 day agoS11NW4CalmCalmCalm------CalmCalm--CalmCalmCalmCalmCalmCalmCalmNE4CalmCalmN5SW7W7
2 days agoSW9W8W3CalmCalm--------CalmCalm----CalmCalmE3CalmCalmCalmCalmCalmCalmS4W5

Tide / Current Tables for Aucilla River entrance, Florida
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Aucilla River entrance
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Sat -- 01:09 AM EDT     Moonrise
Sat -- 02:15 AM EDT     1.68 feet Low Tide
Sat -- 07:08 AM EDT     Sunrise
Sat -- 08:01 AM EDT     3.13 feet High Tide
Sat -- 03:10 PM EDT     Moonset
Sat -- 04:02 PM EDT     0.78 feet Low Tide
Sat -- 08:07 PM EDT     Sunset
Sat -- 10:54 PM EDT     2.67 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.11.81.71.722.42.733.132.82.421.51.10.90.80.91.11.522.32.62.7

Tide / Current Tables for St. Marks River Entrance, Florida
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St. Marks River Entrance
Click for Map
Sat -- 01:10 AM EDT     Moonrise
Sat -- 02:10 AM EDT     1.82 feet Low Tide
Sat -- 07:09 AM EDT     Sunrise
Sat -- 07:58 AM EDT     3.36 feet High Tide
Sat -- 03:11 PM EDT     Moonset
Sat -- 03:57 PM EDT     0.85 feet Low Tide
Sat -- 08:08 PM EDT     Sunset
Sat -- 10:51 PM EDT     2.87 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.221.81.92.22.633.33.43.332.62.11.61.20.90.811.31.72.12.52.82.9

Weather Map and Satellite Images
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wmap_A
GOES 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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (17,4,5,8)
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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.