Thursday, September21, 2017 L-36.com


Marine Weather and Tides
Tallahassee, FL

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 7:24AMSunset 7:35PM Thursday September 21, 2017 5:03 PM EDT (21:03 UTC) Moonrise 7:40AMMoonset 7:47PM Illumination 1% Phase: Waxing Crescent; Moon at 1 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 Apalachicola To Destin Fl Out 20 Nm- Coastal Waters From Ochlockonee River To Apalachicola Fl Out To 20 Nm- Coastal Waters From Suwannee River To Keaton Beach Out 20 Nm- Waters From Apalachicola To Destin Fl From 20 To 60 Nm- Waters From Suwannee River To Apalachicola Fl From 20 To 60 Nm- 240 Pm Edt Thu Sep 21 2017
Tonight..East winds 10 knots. Seas 1 to 2 feet. Dominant period 3 seconds. Protected waters a light chop. Slight chance of showers and isolated Thunderstorms after midnight.
Friday..East winds 10 knots. Seas 1 to 2 feet. Dominant period 3 seconds. Protected waters a light chop. Slight chance of showers and Thunderstorms in the morning.
Friday night..East winds 10 to 15 knots. Seas 2 to 3 feet. Dominant period 3 seconds. Protected waters a light chop. Slight chance of showers and Thunderstorms.
Saturday..East winds 15 to 20 knots. Seas 2 to 3 feet. Dominant period 4 seconds. Protected waters a moderate chop. Chance of showers and Thunderstorms through the day.
Saturday night..East winds 15 to 20 knots. Seas 2 to 3 feet. Dominant period 4 seconds. Protected waters a moderate chop. Chance of showers and Thunderstorms through the night.
Sunday and Sunday night..East winds 10 to 15 knots. Seas 2 to 3 feet. Protected waters a light chop. Chance of showers and Thunderstorms.
Monday..Southeast winds 10 knots. Seas 1 to 2 feet. Protected waters a light chop. Chance of showers and Thunderstorms.
Monday night..Northeast winds 5 to 10 knots. Seas 1 to 2 feet. Protected waters mostly smooth. Slight chance of showers and Thunderstorms.
Tuesday..East winds 5 to 10 knots. Seas 1 foot or less. Protected waters smooth. Slight chance of showers and Thunderstorms.
GMZ700 Synopsis For The Suwannee River To Destin Out To 60 Nm 240 Pm Edt Thu Sep 21 2017
Synopsis.. Easterly winds and seas will increase to potentially cautionary levels this weekend as hurricane maria moves up the gulf stream and increases the pressure gradient between it and the large area of high pressure across much of the southeastern united states. Winds of 15 to 20 knots will be common out of the east Friday evening through Sunday evening, with seas generally in the 2 to 3 foot range. Winds and seas will calm next week.

7 Day Forecast for Marine Location Near Tallahassee, FL
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location: 30.46, -84.25     debug


Area Discussion for -
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Fxus62 ktae 211849
afdtae
area forecast discussion
national weather service tallahassee fl
249 pm edt Thu sep 21 2017

Near term [through tonight]
As discussed this morning, showers and thunderstorms are developing
along and east of a trough axis deep layer moisture gradient from
near panama city northeast through tifton. Right along this dividing
line storms have the greatest potential to produce gusty winds as
some drier air gets entrained in the middle troposphere. Expect the
coverage of storms to increase through the afternoon, coming to an
end around or shortly after sunset. Patchy fog will develop
overnight and be most likely in locations receiving rain this
afternoon. Overnight lows will dip to around 70 degrees across the
region.

Short term [Friday through Saturday night]
A large area of deep layer high pressure will remain stagnant from
the great lakes through texas for much of the period, with a weak
upper level low meandering over the region between the
aforementioned high and hurricane maria in the atlantic. While
the low will linger across the area and boundary layer moisture
remains high, increasing mid level dry air will suppress most
convection across the region tomorrow. Any activity that does
manage to develop will be short lived, as updrafts are expected to
remain weak and activity will be unable to sustain itself. With
moisture remaining stagnant in the boundary layer and drier air
aloft, patchy fog is not out of the question Friday night.

Saturday, the weak mid- level low will tap into moisture preceding
hurricane maria, increasing mid- level moisture and rain chances
once again across the region. Pops will generally range from 30 to
40% across the northwest half of the cwa, with 40 to 60% across
the southeast half. Shower and storm activity will migrate
offshore Saturday night, with patchy fog possible across the
region - especially in areas that receive rainfall. Temperatures
will run near climatology through the period, with highs in the
upper 80s to near 90 and lows in the low 70s.

Long term [Sunday through Thursday]
A drying trend will ensue at the beginning of the long term period,
as the weak upper low mentioned in the short term period drifts
westward and eventually dampens out. This will allow for high
pressure and drier conditions to build into the region Sunday
through much of the work week. There are some early signals of the
ridge breaking down beyond the long term period (day 9 to 10), as
global models hint at a vigorous upper low and associated cold
front approaching the region, which *could* bring more fall like
conditions to the region. Until then, warm and muggy conditions
are expected, with highs generally in the mid to upper 80s and
lows in the lower 70s.

Aviation [through 18z Friday]
Vfr conditions will prevail outside of thunderstorms this afternoon.

Scattered storms have begun to develop across the region and are
most likely at ecp, tlh, and vld. Late this evening, storms should
come to an end and between 06-10z MVFR ifr visibilities will set in
across the region. Restrictions will clear by 13z tomorrow for all
terminals.

Marine
Easterly winds and seas will increase to potentially cautionary
levels this weekend as hurricane maria moves up the gulf stream and
increases the pressure gradient between it and the large area of
high pressure across much of the southeastern united states. Winds
of 15 to 20 knots will be common out of the east Friday evening
through Sunday evening, with seas generally in the 2 to 3 foot
range. Winds and seas will calm next week.

Fire weather
No concerns.

Hydrology
Aside from locally heavy thunderstorms that could yield a quick 1 to
2 inches of rain, rainfall amounts generally less than 1 inch is
expected each day through Sunday morning. Are river levels continue
to trend downward this afternoon, with this trend expected to
continue.

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 70 90 71 89 70 30 10 10 40 20
panama city 73 89 72 87 72 20 10 10 40 30
dothan 68 89 68 87 68 20 10 10 30 10
albany 69 88 69 88 68 30 10 10 30 10
valdosta 69 90 68 89 68 30 20 0 40 20
cross city 68 91 70 89 70 20 30 10 60 20
apalachicola 73 88 72 86 73 10 10 10 50 30

Tae watches warnings advisories
Fl... None.

Ga... None.

Al... None.

Gm... None.

Near term... Harrigan
short term... Pullin
long term... Pullin
aviation... Harrigan
marine... Pullin
fire weather... Fournier
hydrology... Pullin


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SHPF1 - SHP - Shell Point, FL 28 mi129 min S 5.1 G 6 85°F 1014.5 hPa
KTNF1 - Keaton Beach, FL 56 mi63 min ENE 17 G 21 77°F 1015.1 hPa (-1.2)
APXF1 - Apalachicola Reserve, FL 57 mi78 min WNW 6 83°F 75°F

Wind History for Apalachicola, FL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Tallahassee - Tallahassee International Airport, FL7 mi70 minE 710.00 miThunderstorm76°F68°F77%1015.6 hPa
Quincy Municipal Airport, FL19 mi68 minSSW 37.00 miLight Rain73°F73°F100%1016.3 hPa

Wind History from TLH (wind in knots)
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Last 24hrSW6SE5SE3CalmCalmSE4CalmNW6CalmCalmCalmCalmCalmCalmCalmSE3CalmCalm3CalmE6W10E7NW5
1 day agoS9S5CalmCalmCalmCalmE3CalmSW3SW4N6CalmCalmCalmCalmCalmNW5W6N56N63SE10S7
2 days agoN6N4CalmCalmCalmCalmW3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm4NW10NW6NE43Calm

Tide / Current Tables for St. Marks, St. Marks River, Florida
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St. Marks
Click for Map
Thu -- 04:00 AM EDT     3.55 feet High Tide
Thu -- 07:24 AM EDT     Sunrise
Thu -- 08:39 AM EDT     Moonrise
Thu -- 10:35 AM EDT     0.39 feet Low Tide
Thu -- 04:18 PM EDT     3.72 feet High Tide
Thu -- 07:34 PM EDT     Sunset
Thu -- 08:46 PM EDT     Moonset
Thu -- 10:53 PM EDT     0.73 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.11.82.73.33.63.42.92.21.40.80.50.40.91.62.53.33.73.63.22.61.91.30.90.7

Tide / Current Tables for St. Marks, St. Marks River, Apalachee Bay, Florida
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St. Marks
Click for Map
Thu -- 04:01 AM EDT     3.54 feet High Tide
Thu -- 07:24 AM EDT     Sunrise
Thu -- 08:39 AM EDT     Moonrise
Thu -- 10:35 AM EDT     0.38 feet Low Tide
Thu -- 04:18 PM EDT     3.71 feet High Tide
Thu -- 07:34 PM EDT     Sunset
Thu -- 08:46 PM EDT     Moonset
Thu -- 10:53 PM EDT     0.71 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.11.82.63.33.53.42.92.21.40.80.40.40.81.62.53.33.73.63.22.61.91.30.80.7

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 (17,4,5,8)
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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.