Friday, April20, 2018 L-36.com


Marine Weather and Tides
Douglas, GA

Version 3.4
What's New / NOTES
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.
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.

Sunrise 6:57AMSunset 8:07PM Friday April 20, 2018 4:23 PM EDT (20:23 UTC) Moonrise 9:46AMMoonset 12:00AM Illumination 29% Phase: Waxing Crescent; Moon at 5 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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AMZ450 Coastal Waters From Altamaha Sound To Fernandina Beach Fl Out 20 Nm- Coastal Waters From Fernandina Beach To St. Augustine Fl Out 20 Nm- Coastal Waters From St. Augustine To Flagler Beach Fl Out 20 Nm- 311 Pm Edt Fri Apr 20 2018
.small craft advisory in effect through Monday afternoon...
Tonight..East northeast winds 20 to 25 knots with a few gusts to 35 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 7 seconds. Inland waters rough. A chance of showers.
Saturday..East northeast winds 15 to 20 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 7 seconds. Inland waters choppy. A chance of showers.
Saturday night..East winds 15 to 20 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 7 seconds. Inland waters choppy. A chance of showers through the night.
Sunday..East winds 15 to 20 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 7 seconds. Inland waters choppy. A chance of showers.
Sunday night..East southeast winds 15 to 20 knots. Seas 6 to 8 feet with occasional seas up to 10 feet. Inland waters choppy. Showers and isolated Thunderstorms.
Monday..South southeast winds 15 to 20 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Inland waters choppy. Showers and isolated Thunderstorms.
Monday night..South southwest winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Inland waters a light chop. Showers likely.
Tuesday..South southwest winds 5 to 10 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Inland waters a light chop. A chance of showers and a slight chance of Thunderstorms.
Tuesday night..West southwest winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Inland waters a moderate chop.
Wednesday..West southwest winds 5 to 10 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Inland waters a light chop.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 311 Pm Edt Fri Apr 20 2018
Synopsis.. Strong high pressure will be to the north tonight, then to the northeast over the weekend. An area of low pressure will track eastward across area from the northern gulf coast early next week. This low will be to the north toward the middle of next week. Elevated winds and seas will continue through this period.

7 Day Forecast for Marine Location Near Douglas, GA
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location: 31.54, -82.82     debug


Area Discussion for - Jacksonville, FL
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Fxus62 kjax 201832
afdjax
area forecast discussion
national weather service jacksonville fl
232 pm edt Fri apr 20 2018

Wind advisory atlantic coast through this evening..

High risk of rip currents through Saturday...

Near term through Saturday ...

high pressure will build to the north this afternoon and evening,
with an inverted trough over the western atlantic. These features
will enhance the pressure gradient keeping winds elevated. As the
high builds more to the northeast late tonight into Saturday, the
trough will push ashore, bringing the potential for rain showers,
with winds remaining elevated. The best chance for showers will be
across coastal portions of NE fl.

The same onshore winds that have caused cool readings across eastern
counties today, will help hold readings up across the east tonight.

Coolest readings tonight will be over inland SE ga.

Short term Sat night through Monday...

stormy and wet weather this period as a surface low pressure
system develops near the lower ms river valley region Saturday
night then intensifies through Monday as it tracks east across the
gulf coast states. The parent 500 mb vortex dives pretty far
south with this system, and lingers across tn al ms Sun night-mon
night before lifting nne. This pattern will bring and sustain a
deep plume of high, deep layer moisture across the local area with
precipitable water values (pwats) rising to 1.5-1.8" sun
afternoon through Mon evening when a dry slot of air is expected
to cut-off rainfall from the wsw.

Sat night cloudy skies will prevail with breezy onshore flow as a
warm front lifts northward up the fl peninsula, with increasing
rain chances from south to north. Will continue with isolated to
scattered showers, with the best chances of localized heavy
rainfall potential along the NE fl atlantic coast due to moisture
convergence along the northern edge of the lifting warm front.

Passing showers will continue into Sun as the airmass moistens
ahead of the intensifying low pressure system, with a chance of
isolated thunderstorms by Sun afternoon as both dynamical forcing
and instability increase from the west. Sun night through mon
afternoon is expected to be the wettest period with waves of
widespread stratiform rainfall with embedded tstorms rotating over
the local area from west to east as several trough axes rotate
around the slow moving, almost vertically stacked, low pressure
system as it drifts eastward from ms toward al and the western fl
panhandle through Mon evening. Widespread storm total rainfall
accumulations were still hovering around 1-3 inches, with locally
higher amounts, especially along the local atlantic coast and
inland SE ga where convergence and dynamical forcing will be
strongest. There is the potential for embedded storms Sun through
mon evening, with a chance of a few strong rotating cells Monday
when shear, surface based instability and forcing will phase
especially across the suwannee river valley and inland SE ga. Mon
evening the mid level 500 mb vortex finally begins to lift and
translate nne, with a dry slot of air infiltrating the gulf coast
states including the local forecast area with pwats falling below
1 inch and very dry mid level air. This instruction of dry air
will cease widespread rainfall and limit deep convective growth
needed for thunderstorms. Expect lingering scattered to isolated
showers Mon night as the surface low drifts east across ga with
plenty of low level moisture in place.

Temperatures will trend below normal for highs given cloud cover
and precip with highs generally in the 70s, with above normal lows
generally in the 60s.

Long term Tuesday through Friday...

generally drier conditions but progressive pattern with mean
layer eastern CONUS trough swinging weakening surface front across
the region. The surface low pressure system tracks across ga tue
and up the mid-atlantic coast then new england through thu. Higher
potential now for another wave of showers and tstorms Tue with
the new 12z gfs40 trending slower with low tracking across ga, and
thus increased precip chances generally east of highway 301
toward the atlantic coast Tue afternoon evening. After tue
evening, there will be a couple more waves of showers passing over
the local area as trailing wake troughs slide across the region
behind the departing surface low. Drier weather late Thu into fri
as high pressure builds quickly east across the fl peninsula, then
another approaching cold front late Fri with a low chance of
rainfall. Drier weather returns Sat as high pressure builds
eastward across the gulf coast states through early next week.

Temperatures will generally trend near to slightly below normal
for highs generally in the 70s and near to slightly above normal
for lows generally in the upper 50s to lower 60s.

Aviation
Restrictions will continue this 18z TAF period in stratus clouds.

Winds will remain elevated this period.

Marine
Strong high pressure will be to the north tonight, then to the
northeast over the weekend. An area of low pressure will track
eastward across area from the northern gulf coast early next week.

This low will be to the north toward the middle of next week.

Elevated winds and seas will continue through this period.

Rip currents: high risk through Saturday.

Preliminary point temps pops
Amg 50 75 56 72 0 10 20 40
ssi 60 69 62 69 0 10 20 50
jax 59 73 62 74 0 30 30 50
sgj 65 72 63 74 40 50 30 50
gnv 59 76 62 77 10 50 30 60
ocf 61 78 62 80 40 50 30 60

Jax watches warnings advisories
Fl... High rip current risk through Saturday evening for coastal duval-
coastal nassau-flagler-st. Johns.

Wind advisory until 10 pm edt this evening for coastal duval-
coastal nassau-flagler-inland duval-inland nassau-st. Johns.

Ga... High rip current risk through Saturday evening for coastal
camden-coastal glynn.

Wind advisory until 10 pm edt this evening for coastal camden-
coastal glynn.

Am... Small craft advisory until 5 am edt Tuesday for waters from
altamaha sound ga to fernandina beach fl from 20 to 60 nm-
waters from fernandina beach to st. Augustine fl from 20 to
60 nm-waters from st. Augustine to flagler beach fl from 20
to 60 nm.

Small craft advisory until 4 pm edt Monday for coastal waters
from altamaha sound to fernandina beach fl out 20 nm-
coastal waters from fernandina beach to st. Augustine fl
out 20 nm-coastal waters from st. Augustine to flagler
beach fl out 20 nm.

Enyedi 23 corless bricker


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SAXG1 - Sapelo Island Reserve, GA 81 mi143 min NE 19 62°F 1026 hPa (+0.0)51°F
FRDF1 - 8720030 - Fernandina Beach, FL 93 mi53 min N 8.9 G 18 63°F 67°F1024.7 hPa

Wind History for Fernandina Beach, FL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Douglas, Douglas Municipal Airport, GA5 mi48 minNE 510.00 miPartly Cloudy70°F41°F35%1024.7 hPa
Alma, Bacon County Airport, GA17 mi30 minN 510.00 miFair71°F42°F35%1023.6 hPa

Wind History from DQH (wind in knots)
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Last 24hrW17
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W6NW3NW4N5N6N9N10N6N7N6NE7NE7NE8NE16
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1 day agoW14
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2 days agoW11
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W12W8SW6SW6SW5SW4SW7SW5W5W6W7SW5W3CalmSW3W6W7W6SW10W11
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Tide / Current Tables for Burnt Fort, Satilla River, Georgia
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Burnt Fort
Click for Map
Fri -- 04:37 AM EDT     3.81 feet High Tide
Fri -- 06:54 AM EDT     Sunrise
Fri -- 10:43 AM EDT     Moonrise
Fri -- 11:51 AM EDT     -0.03 feet Low Tide
Fri -- 05:06 PM EDT     3.22 feet High Tide
Fri -- 07:59 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.21.12.23.13.73.83.52.92.11.30.60.1-00.41.32.22.93.23.12.721.30.60.1

Tide / Current Tables for Below Spring Bluff, Little Satilla River, Georgia
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Below Spring Bluff
Click for Map
Fri -- 01:51 AM EDT     8.84 feet High Tide
Fri -- 06:52 AM EDT     Sunrise
Fri -- 08:17 AM EDT     -0.07 feet Low Tide
Fri -- 10:42 AM EDT     Moonrise
Fri -- 02:20 PM EDT     7.48 feet High Tide
Fri -- 07:58 PM EDT     Sunset
Fri -- 08:25 PM EDT     -0.12 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
7.28.58.88.26.74.62.40.8-00.31.73.45.26.77.47.36.34.52.50.9-00.11.53.4

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 Jacksonville, FL (16,3,4,5)
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Ground Weather Radar Station Moody AFB, GA
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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.