Sunday, May20, 2018 L-36.com


Marine Weather and Tides
St. Marks, FL

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 6:38AMSunset 8:29PM Sunday May 20, 2018 5:51 PM EDT (21:51 UTC) Moonrise 10:50AMMoonset 12:00AM Illumination 35% Phase: Waxing Crescent; Moon at 6 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
    EDIT      (on/off)   Help
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- 306 Pm Edt Sun May 20 2018
Tonight..Southeast winds around 15 knots. Seas 2 to 4 feet. Dominant period 4 seconds. Protected waters a moderate chop. Chance of showers and slight chance of Thunderstorms.
Monday..Southeast winds around 15 knots. Seas 2 to 4 feet. Dominant period 4 seconds. Protected waters a moderate chop. Showers and Thunderstorms likely in the morning, then chance of showers and Thunderstorms in the afternoon.
Monday night..Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Dominant period 4 seconds. Protected waters a light chop. Chance of showers and Thunderstorms.
Tuesday..Southeast winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 5 seconds. Protected waters a light chop. Chance of showers and Thunderstorms.
Tuesday night..Southeast winds 10 knots. Seas 2 to 3 feet. Dominant period 5 seconds. Protected waters a light chop. Chance of showers and Thunderstorms in the evening, then slight chance of showers and Thunderstorms after midnight.
Wednesday..South winds 10 knots. Seas 2 to 3 feet. Protected waters a light chop. Chance of showers and Thunderstorms.
Wednesday night..Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Protected waters mostly smooth. Slight chance of showers and Thunderstorms.
Thursday..Southeast winds 5 to 10 knots. Seas 1 to 2 feet. Protected waters a light chop. Chance of showers and Thunderstorms.
Thursday night..Southeast winds 10 knots. Seas 1 to 2 feet. Protected waters a light chop. Chance of showers and Thunderstorms.
Friday..Southeast 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 306 Pm Edt Sun May 20 2018
Synopsis.. Winds and seas are forecast to generally remain around 15 knots or less over the next several days, although scattered to numerous showers and Thunderstorms are expected through the period with locally higher winds and seas possible. There is some potential for an area of low pressure to develop in the gulf by next weekend with higher winds and seas, but that forecast is uncertain at this time.

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


Area Discussion for -
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus62 ktae 201916
afdtae
area forecast discussion
national weather service tallahassee fl
316 pm edt Sun may 20 2018

Near term [through tonight]
At 18z, a shield of light rain was covering the eastern third of
our area and continuing to build northwestward. Across the
western two-thirds of the area, more convectively-driven storms
are popping up with smaller area coverage, but heavier rainfall
rates and some lightning. While a downburst of gusty winds can't
be ruled out this afternoon evening with these storms, the main
impact today and tonight will be moderate to heavy rainfall.

Coverage will continue to fill in across the tri-state area and
most of the area could see rainfall accumulations around 0.5-1"
through tonight. Our local ensemble of hi-res models shows about a
30-40% chance of 3" in the western fl big bend and eastern fl
panhandle. This particular part of our area is still in a deficit,
so this is some much needed rain, but falling over a short time
period, it could cause some minor flooding in areas with poor
drainage.

Short term [Monday through Tuesday night]
Deep tropical moisture will remain in place through the middle of
the week. A persistent upper-level shortwave will also remain over
the eastern gulf. This upper-level forcing in a moisture rich and
unstable environment will combine with the afternoon seabreeze,
nocturnal landbreeze, and various mesoscale boundaries to initiate
scattered to numerous showers and thunderstorms each day night.

Localized pockets of heavy rainfall are expected to be the main
threat given the tropical airmass. High temperatures are expected
to be a bit below average given the cloud cover and convection,
and low temperatures are expected to be a bit above average given
the tropical airmass with high dewpoints.

Long term [Wednesday through Sunday]
Deep moisture is expected to remain in place through the week and
into next weekend with daily chances of showers and thunderstorms.

Models forecast a complex sequence of events to take place in the
gulf late in the week into the weekend with potential low pressure
development. The low doesn't appear to be fully tropical in the
guidance with the subtropical jet involved, and with such a complex
evolution, sensitivity is high and expect to see a high variability
of model depictions for the next few days. We'll continue to keep
an eye on it. There is potential for heavy rainfall in the area
should the low eventually move towards the central or eastern gulf
coast next weekend with a long fetch of deep southerly flow on
the eastern side.

Aviation
[through 18z Monday] scattered tsra this afternoon west of a line
from tlh to fzg, with a shield of -ra to the east. CIGS will
deteriorate to MVFR this afternoon with storms, with ifr vsbys
possible during heavier downpours. Overnight, CIGS will
deteriorate further to ifr, not lifting until around 14-15z.

Marine
Winds and seas are forecast to generally remain around 15 knots or
less over the next several days, although scattered to numerous
showers and thunderstorms are expected through the period with
locally higher winds and seas possible. There is some potential
for an area of low pressure to develop in the gulf by next
weekend with higher winds and seas, but that forecast is uncertain
at this time.

Fire weather
No fire weather concerns are anticipated at least through the next
several days.

Hydrology
Overall, a wet pattern is expected through next week with average 7
day rainfall amounts of 3-5 inches across the area. Localized
higher amounts could occur. Isolated instances of flooding in
urban and poor drainage areas could occur if locally heavier
amounts fall in a flood prone location over a short amount of
time. River levels remain on the low side currently, so river
flooding is not expected for at least the next few days unless
large scale forecast rainfall totals increase or locally heavier
totals fall over one of the smaller basins. By next weekend, river
levels are expected to be rising with the expected rainfall
amounts, but any flooding is highly uncertain.

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 69 82 70 83 69 70 60 50 50 30
panama city 71 80 72 81 73 50 70 50 50 30
dothan 68 80 69 81 69 50 70 50 70 40
albany 68 83 69 83 69 50 70 50 70 50
valdosta 67 82 68 83 69 50 70 40 70 40
cross city 68 82 69 83 69 60 70 40 50 30
apalachicola 71 79 73 80 72 60 60 50 40 30

Tae watches warnings advisories
Fl... None.

Ga... None.

Al... None.

Gm... None.

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


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SHPF1 - SHP - Shell Point, FL 15 mi118 min ESE 15 G 22 76°F 1018 hPa
KTNF1 - Keaton Beach, FL 28 mi52 min NE 6 G 8 72°F 1018.8 hPa (-1.4)70°F

Wind History for Apalachicola, FL
(wind in knots)    EDIT      (on/off)   Help
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
Last
24hr
S10
SW6
G10
SW4
SW2
SW3
S5
S3
S3
S4
N2
N1
N4
NE4
N4
NE5
NE4
E6
SE7
G11
SE11
SE9
SE9
G12
SE10
G13
SE11
G16
SE13
1 day
ago
S9
S7
S9
S11
S10
S9
S6
G9
SW6
SW6
S8
S8
S9
SW5
G8
S5
S4
S3
SE3
S4
S6
S6
S6
S7
S8
S9
2 days
ago
SE7
G11
S14
G17
S11
SW9
G12
S11
G14
SW9
S14
SW11
SW9
SW10
G13
S11
G15
SW10
G13
SW9
SW11
W9
G17
SW8
SE5
S10
S11
SW8
SW7
G10
SW9
SW10
S10

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Perry-Foley, Perry-Foley Airport, FL23 mi77 minE 37.00 miOvercast72°F69°F91%1019.3 hPa

Wind History from 40J (wind in knots)
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
Last 24hrS3SE7
G21
CalmE4SE7SE3CalmSE3E3SE3SE5SE3E3CalmSE6SE7SE6E5E5SE7SE7
G15
SE6CalmCalm
1 day agoSW7SW6SW5SE3CalmSE3CalmSE5S3CalmCalmCalmCalmCalmSE4CalmCalmCalmCalmCalmCalmCalmS7W5
2 days agoCalmSW8SW3S4CalmS4SW3S3S3SE4S4S4SE4CalmSE3SW8SW9W4
G10
SW5S5SW6SW9
G12
W5
G9
W8

Tide / Current Tables for Aucilla River entrance, Florida
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Aucilla River entrance
Click for Map
Sun -- 12:39 AM EDT     -0.30 feet Low Tide
Sun -- 12:52 AM EDT     Moonset
Sun -- 06:39 AM EDT     Sunrise
Sun -- 07:25 AM EDT     2.80 feet High Tide
Sun -- 11:50 AM EDT     Moonrise
Sun -- 12:14 PM EDT     1.63 feet Low Tide
Sun -- 05:52 PM EDT     3.41 feet High Tide
Sun -- 08:25 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.2-0.300.61.322.52.82.82.52.11.81.61.722.533.33.43.22.82.21.50.9

Tide / Current Tables for St. Marks River Entrance, Florida
   EDIT      (on/off)   Help   One Week of Data
St. Marks River Entrance
Click for Map
Sun -- 12:34 AM EDT     -0.33 feet Low Tide
Sun -- 12:53 AM EDT     Moonset
Sun -- 06:40 AM EDT     Sunrise
Sun -- 07:22 AM EDT     3.01 feet High Tide
Sun -- 11:51 AM EDT     Moonrise
Sun -- 12:09 PM EDT     1.78 feet Low Tide
Sun -- 05:49 PM EDT     3.67 feet High Tide
Sun -- 08:26 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.3-0.300.71.42.22.7332.72.31.91.81.92.22.73.23.63.73.532.31.60.9

Weather Map and Satellite Images
       (on/off)   HelpWeather Map
wmap_A
GOES Local Image of Southeast    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.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (17,4,5,8)
      (on/off)   Help

Ground Weather Radar Station Tallahassee, FL
   (on/off)   Help
weather_mapweather_map weather_map

Gulf Stream Current


Ad by Google

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.