Monday, July22, 2019 L-36.com


Marine Weather and Tides
St. Simons, GA

Version 3.4
NOTICE
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 6:35AMSunset 8:29PM Monday July 22, 2019 7:23 PM EDT (23:23 UTC) Moonrise 11:08PMMoonset 10:34AM Illumination 67% Phase: Waning Gibbous; Moon at 21 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
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- 330 Pm Edt Mon Jul 22 2019
Tonight..South southwest winds 10 to 15 knots. Seas 2 to 3 feet. Dominant period 4 seconds. Inland waters a moderate chop. A slight chance of showers and Thunderstorms.
Tuesday..South southwest winds 5 to 10 knots becoming south southeast 10 to 15 knots in the afternoon. Seas 2 to 4 feet. Dominant period 7 seconds. Inland waters a light chop. Showers and Thunderstorms likely.
Tuesday night..Southwest winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 6 seconds. Inland waters a light chop. A chance of showers and a slight chance of Thunderstorms.
Wednesday..Southwest winds 5 to 10 knots becoming south in the afternoon. Seas 2 to 3 feet. Dominant period 7 seconds. Inland waters a light chop. Showers and Thunderstorms.
Wednesday night..Southwest winds 5 to 10 knots. Seas 2 to 3 feet. Dominant period 7 seconds. Inland waters a light chop. Showers and Thunderstorms likely.
Thursday..West winds 5 to 10 knots. Seas 2 to 3 feet. Dominant period 7 seconds. Inland waters a light chop. Showers and Thunderstorms.
Thursday night..West northwest winds 5 to 10 knots becoming south southeast after midnight. Seas 1 to 2 feet. A chance of showers and Thunderstorms.
Friday..North northeast winds 5 to 10 knots becoming east northeast in the afternoon. Seas 2 to 3 feet. Showers and Thunderstorms likely.
Friday night..East southeast winds 5 to 10 knots becoming south after midnight. Seas 2 to 3 feet. A chance of showers and Thunderstorms.
Saturday..North northeast winds 5 to 10 knots becoming east in the afternoon. Seas 1 to 2 feet. Showers and Thunderstorms likely.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 330 Pm Edt Mon Jul 22 2019
Synopsis.. High pressure will extend over the local waters through tonight, then shift south of the waters Tuesday. Winds will become onshore near the coast this afternoon and again Tuesday with the east coast sea breeze. Southwest flow will increase late Tuesday as a front approaches from the north. This front will stall and linger over the local waters through the end of the week bringing increased chances for showers and Thunderstorms.
Gulf stream.. The approximate location of the west wall of the gulf stream as of jul 20, 2019 at 1200 utc... 36 nautical miles east northeast of flagler beach. 46 nautical miles east of saint augustine beach. 62 nautical miles east southeast of jacksonville beach. 94 nautical miles east southeast of st simons island. This data courtesy of the naval oceanographic office.


7 Day Forecast for Marine Location Near St. Simons, GA
   Hourly   EDIT   Help
location: 31.13, -81.39     debug


Area Discussion for - Jacksonville, FL
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus62 kjax 221926
afdjax
area forecast discussion
national weather service jacksonville fl
326 pm edt Mon jul 22 2019

Near term through Tuesday ...

forecast area will be on eastern side of a weak upper trough through
tonight. 12z soundings showing drier air aloft which should support
lesser coverage of afternoon showers t-storms comopared to past few
days. Best coverage looks to be interior part of NE fl with lesser
coverage further E and across SE ga... Diminishing during the evening.

Low temperatures will be in the lower-mid 70s.

As upper ridge over western u.S. Strengthens, upper trough over
eastern states will strengthen. This will bring a cold front down
to northern ga and western sc late Tuesday, with a pre-frontal
trough extending NE to SW across SE ga late in the day. In
addition to scattered sea breeze t-storms, expect a broken line of
convection along pre-frontal trough across south-central ga.

Another larger area of showers t-storms could move northward
across coastal waters of NE fl and our southern counties
associated with moisture from a tropical disturbance currently
over the bahamas. Another hot, humid day Tuesday with near normal
high temperatures in the lower 90s.

Short term Tuesday night through Wednesday night
Activity along the pre-frontal trough could continue through much of
the night before diminishing. For Wednesday, upper trough axis moves
toward forecast area with cold front hung up from appalachians to
srn al, with pre-frontal trough stalled over SRN ga. Models suggest
weak low pressure will track along it from fl panhandle Wed morning
to far SE ga Wed evening. Could be locally heavy rainfall,
potentially 2-3 inches, with this feature through Wed night.

Meanwhile moisture from tropical disturbance near bahamas may lead
to numerous showers over our eastern counties and across coastal
waters. Will go with likely to categorical pops wed, with chance
values continuing Wed night. Cloud cover and precipitation should
support below normal high temperatures in the mid 80s, possibly
upper 80s far SE counties... But high dew points should keep low
temperatures to around normal values.

Long term Thursday through Sunday
Another weak wave of low pressure may track NE from NE gulf of
mexico on Thursday with widespread rain and t-storms. Will again
go likely to categorical pop Thursday, with chance values
continuing Thursday night. Mid to upper 80s expected for high
temperatures Thursday.

Upper trough retrogrades slightly westward Friday and Saturday,
while upper ridging builds over central SRN fl. This pattern
should support more widespread coverage of afternoon
showers t-storms across NE fl than SE ga. High temperatures will
increase slightly to upper 80s around 90 both days.

Sunday features upper ridge over fl, with slightly warmer high
temperatures and more scattered nature to afternoon
showers t-storms.

Aviation East coast sea breeze front was setting up and beginning
to edge inland triggering showers and isolated storms which will
approach ssi, crg and sgj through 20z and bring brief MVFR
ceilings. Winds were transitioning at coastal locations to sse
with speeds 9-13 kts. Best potential for restrictions due to
thunderstorm activity will continue to focus at inland terminals
including jax, vqq and gnv through early evening. Rainfall will
fade in coverage this evening, with dry conditions expected by
midnight. Potential for late night low stratus and ground fog
where recent rainfall occurred, especially gnv and vqq early tue
morning.

Marine High pressure will remain east of the waters while a
frontal boundary approaches the area from the northwest through
Tuesday. Weak low pressure is expected to track along the boundary
over southern ga Wednesday. In addition, tropical moisture from a
disturbance over the bahamas will spread across our area. The
result is expected to be a wet period with numerous showers and
t-storms over the waters through the middle and latter part of the
week.

Rip currents: moderate risk for the NE fl beaches as southeast
flow this afternoon will push surf breakers into the 2-3 feet
range, while low risk remains along the SE ga coast north of the
high pressure ridge axis where onshore flow is a bit weaker.

Preliminary point temps pops
Amg 72 92 72 81 30 60 60 70
ssi 77 91 75 85 20 40 60 80
jax 74 91 73 87 40 50 50 80
sgj 74 91 73 86 20 60 40 80
gnv 72 91 73 86 40 60 30 80
ocf 72 90 73 86 40 60 40 80

Jax watches warnings advisories
Fl... None.

Ga... None.

Am... None.

Wolf cordero 23


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
SAXG1 - Sapelo Island Reserve, GA 21 mi84 min S 12 86°F 1015 hPa (-1.0)73°F
41112 - Offshore Fernandina Beach, FL (132) 30 mi54 min 83°F2 ft
FRDF1 - 8720030 - Fernandina Beach, FL 32 mi54 min S 5.1 G 8 87°F 87°F1015.6 hPa
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 33 mi94 min S 12 G 14 84°F 84°F1 ft1015.4 hPa (-1.4)76°F

Wind History for Fernandina Beach, FL
(wind in knots)    EDIT      (on/off)   Help
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
24hr
S8
G14
SW4
G9
S1
S3
SW2
G5
S1
E1
--
W1
S1
SE2
SE1
SE2
SE2
S5
S3
G7
SE5
G9
E4
G10
SE6
G11
SE9
G12
SE9
G17
SE8
G13
SE7
G12
SE5
G9
1 day
ago
SE7
G13
SE8
G13
S3
G6
SW2
G7
E3
--
--
W4
W2
SE2
E1
SE3
S3
G6
SW4
SW2
G6
SW5
W4
W2
SE3
G6
SE6
G10
E8
G11
SE7
G12
SE9
G13
SE10
G15
2 days
ago
SW2
W3
SW3
SW1
W2
NW2
N1
SE1
E2
SE1
--
W4
--
--
SE1
S3
E4
G7
SE4
G9
E6
G9
SE4
E4
G9
E5
G11
SE8
G13

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Brunswick, Malcolm McKinnon Airport, GA1 mi31 minS 710.00 miFair87°F73°F63%1014.7 hPa
Brunswick / Glynco, GA10 mi29 minSSE 1210.00 miFair86°F72°F65%1014.9 hPa

Wind History from BQK (wind in knots)
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
7
PM
Last 24hrSE14
G18
S11W5S5SW5S7CalmCalmCalmCalmCalmCalmCalmCalmW3W3SW6S6SW6SE13
G16
S10
G15
S11
G16
S9SE9
1 day agoS12SE11S15
G22
S13S4CalmS4CalmCalmCalmCalmCalmW5W3SW7W6W5SW5CalmW7SW3S9SE11S11
2 days agoCalmSW4W6W5CalmCalmCalmCalmS3CalmNW4CalmW3W4W4W3SW5SW6W7W6S6SW7S9SE8

Tide / Current Tables for St. Simons Lighthouse, St. Simons Island, Georgia
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Mackay River (Daymark #239), Georgia
   EDIT      (on/off)   Help   One Week of Data
Mackay River (Daymark #239)
Click for Map
Mon -- 01:09 AM EDT     6.85 feet High Tide
Mon -- 06:36 AM EDT     Sunrise
Mon -- 07:22 AM EDT     0.62 feet Low Tide
Mon -- 11:34 AM EDT     Moonset
Mon -- 01:34 PM EDT     6.43 feet High Tide
Mon -- 07:29 PM EDT     1.22 feet Low Tide
Mon -- 08:27 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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
7
pm
8
pm
9
pm
10
pm
11
pm
6.56.86.65.74.42.91.50.70.81.83.24.65.76.36.45.84.63.32.11.31.32.13.44.7

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Jacksonville, FL (19,4,5,8)
      (on/off)   Help

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

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.