Monday, January20, 2020
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Marine Weather and Tides
St. Simons, GA

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 7:22AMSunset 5:51PM Monday January 20, 2020 7:18 PM EST (00:18 UTC) Moonrise 3:32AMMoonset 2:17PM Illumination 18% Phase: Waning Crescent; Moon at 25 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- 253 Pm Est Mon Jan 20 2020
.small craft advisory in effect through Wednesday afternoon...
Tonight..North winds around 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Inland waters choppy.
Tuesday..North winds 20 to 25 knots with a few gusts to gale force. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 6 seconds. Inland waters rough.
Tuesday night..North winds 20 to 25 knots with a few gusts to gale force. Seas 6 to 9 feet with occasional seas up to 11 feet. Dominant period 8 seconds. Inland waters rough.
Wednesday..North winds 25 to 30 knots. Seas 7 to 10 feet with occasional seas up to 13 feet. Dominant period 10 seconds. Inland waters rough.
Wednesday night..North northeast winds 20 to 25 knots with gusts to around 35 knots. Seas 7 to 10 feet with occasional seas up to 13 feet. Dominant period 10 seconds. Inland waters choppy. A chance of showers.
Thursday..Northeast winds 15 to 20 knots. Seas 6 to 8 feet with occasional seas up to 10 feet. Dominant period 11 seconds. Inland waters a moderate chop. A chance of showers.
Thursday night..East winds 10 to 15 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. A chance of showers.
Friday..South southeast winds 10 to 15 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Showers likely.
Friday night and Saturday..West winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. A chance of showers.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 253 Pm Est Mon Jan 20 2020
Synopsis.. The region will be between high pressure to the northwest and low pressure to the southeast through Tuesday, with the high building to the north Wednesday as the low moves further to the south. The high will build to the north northeast Thursday. An area of low pressure will track northeast from the gulf Friday, and move to the northeast Friday night into Saturday. High pressure will build from the west over the weekend.
Gulf stream.. The approximate location of the west wall of the gulf stream as of jan 20, 2020 at 1200 utc... 63 nautical miles east of flagler beach. 68 nautical miles east of saint augustine beach. 76 nautical miles east of jacksonville beach. 89 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
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location: 31.13, -81.39     debug


Area Discussion for - Jacksonville, FL
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FXUS62 KJAX 202351 AFDJAX

Area Forecast Discussion National Weather Service Jacksonville FL 651 PM EST Mon Jan 20 2020

AVIATION. [Through 00Z Wednesday]

VFR conditions are expected to prevail through Tuesday. Some scattered clouds around 2.5-3 kft located near SGJ and possibly around CRG vicinity through Tuesday. Outside chance of brief MVFR cigs at SGJ from about 09z-14z. Northerly winds tonight about 8 to 12 kt for the coastal TAFs but under 8 kt for JAX, VQQ, and GNV. Northerly winds will then increase to 10-15 knots and gusty on Tuesday after 14z.

PREV DISCUSSION [306 PM EST].

Near Term. /Through Tonight/ .

Strong high pressure will be northwest of the region through Tonight, with a low pressure trough to the southeast. The gradient between these two features will keep wind stirring somewhat tonight, especially near the coast, but frost potential still exists. Temperatures will trend well below normal Tonight, with readings falling into the upper 20s over interior, and even into the mid to upper 30s along the NE FL coast. Freeze warning for Tonight for much of area, except for coastal NE FL. With winds staying elevated at the coast, favoring a wind chill advisory for SE GA coast.

Short Term. /Tuesday through Friday/ .

The region remains between the high to the northwest and low to the southeast Tuesday, with cold advection continuing. Highs in the mid 40s to the lower 50s will be common.

The high will build more toward the north as the low moves further toward the southeast Tuesday night through Wednesday night. After another well below normal night Tuesday night with a fairly widespread freeze expected, and another cooler than normal day Wednesday. The flow will trend more onshore Wednesday night, allowing for a more seasonal low, and the potential for a few coastal showers.

The high will build toward the northeast Thursday through Friday. An area of low pressure will track northeast from the gulf and into the region Friday. Scattered to numerous showers will move across the area, associated with this low Thursday night into Friday. Temperatures will moderate back to around normal Thursday, then above normal on Friday.

Long Term. /Friday night through Monday/ .

Low will track to the northeast Friday night as high pressure builds from the west. The high will continue to build from the west over the weekend, then overhead on Monday. Lingering showers expected Friday night, then dry weather for Saturday through Monday. Temperatures will trend near to a little below normal this period.

Marine.

The region will be between high pressure to the northwest and low pressure to the southeast through Tuesday, with the high building to the north Wednesday as the low moves further to the south. The high will build to the north northeast Thursday. An area of low pressure will track northeast from the gulf Friday, and move to the northeast Friday night into Saturday. High pressure will build from the west over the weekend. Rip Currents: Moderate risk through Tuesday.

PRELIMINARY POINT TEMPS/POPS.

AMG 28 47 27 52 33 / 0 0 0 0 0 SSI 32 46 33 52 42 / 0 0 0 0 0 JAX 29 49 30 54 42 / 0 0 0 0 0 SGJ 37 49 35 57 48 / 0 0 0 10 20 GNV 28 51 28 55 40 / 0 0 0 0 0 OCF 30 52 28 57 42 / 0 0 0 0 0

JAX WATCHES/WARNINGS/ADVISORIES. FL . Freeze Warning from midnight tonight to 10 AM EST Tuesday for Baker-Bradford-Central Marion-Clay-Coastal Nassau-Eastern Alachua-Eastern Marion-Gilchrist-Hamilton-Inland Duval- Inland Nassau-Northern Columbia-Putnam-Southern Columbia- Suwannee-Union-Western Alachua-Western Marion.

GA . Freeze Warning from midnight tonight to 10 AM EST Tuesday for Appling-Atkinson-Bacon-Brantley-Clinch-Coastal Camden- Coastal Glynn-Coffee-Echols-Inland Camden-Inland Glynn-Jeff Davis-Northeastern Charlton-Northern Ware-Pierce-Southern Ware-Wayne-Western Charlton.

Wind Chill Advisory from 2 AM to 10 AM EST Tuesday for Coastal Camden-Coastal Glynn.

AM . Gale Watch from Tuesday afternoon through Wednesday afternoon 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 EST 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 EST Wednesday 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.


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
41112 - Offshore Fernandina Beach, FL (132) 30 mi49 min 61°F5 ft
FRDF1 - 8720030 - Fernandina Beach, FL 32 mi49 min 51°F 61°F1024.9 hPa
41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA 33 mi29 min NNE 16 G 19 47°F 60°F4 ft1025.2 hPa (+0.9)32°F

Wind History for Fernandina Beach, FL
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Brunswick, Malcolm McKinnon Airport, GA1 mi26 minNNE 410.00 miFair44°F30°F60%1025.6 hPa
Brunswick / Glynco, GA10 mi24 minNE 510.00 miFair40°F31°F70%1025.7 hPa

Link to 5 minute data for KBQK

Wind History from BQK (wind in knots)
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1 day agoS7S9S10S12S12S13S11
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Tide / Current Tables for St. Simons Lighthouse, St. Simons Island, Georgia
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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
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Mackay River (Daymark #239)
Click for Map
Mon -- 03:32 AM EST     Moonrise
Mon -- 05:11 AM EST     7.28 feet High Tide
Mon -- 07:23 AM EST     Sunrise
Mon -- 11:40 AM EST     0.06 feet Low Tide
Mon -- 02:17 PM EST     Moonset
Mon -- 05:23 PM EST     6.38 feet High Tide
Mon -- 05:49 PM EST     Sunset
Mon -- 11:48 PM EST     -0.37 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.41.83.65.46.77.376.24.83.21.50.30.10.92.44.15.66.36.25.44.22.71.1-0

Weather Map
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wmap_A
GEOS 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)
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Ground Weather Radar Station Jacksonville, FL
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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 numerous 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.