Tuesday, August21, 2018 L-36.com


Marine Weather and Tides
St. Augustine, FL

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Sunrise 6:55AMSunset 8:01PM Tuesday August 21, 2018 10:04 PM EDT (02:04 UTC) Moonrise 3:51PMMoonset 1:43AM Illumination 81% Phase: Waxing Gibbous; Moon at 11 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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AMZ454 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- 921 Pm Edt Tue Aug 21 2018
Rest of tonight..South southwest winds 10 to 15 knots. Seas 2 to 3 feet. Dominant period 4 seconds. Inland waters a moderate chop.
Wednesday..South winds 10 to 15 knots. Seas 2 to 3 feet. Dominant period 10 seconds. Inland waters a moderate chop. A slight chance of showers and Thunderstorms in the morning, then a chance of showers and Thunderstorms in the afternoon.
Wednesday night..West southwest winds 10 to 15 knots. Seas 2 to 3 feet. Dominant period 4 seconds. Inland waters a light chop. A chance of showers and Thunderstorms in the evening, then a slight chance of showers and Thunderstorms after midnight.
Thursday..West northwest winds 5 to 10 knots becoming east northeast 10 to 15 knots in the afternoon. Seas 2 to 3 feet. Dominant period 10 seconds. Inland waters a light chop. A slight chance of showers and Thunderstorms in the morning, then a chance of showers and Thunderstorms in the afternoon.
Thursday night..East northeast winds 10 to 15 knots. Seas 2 to 3 feet. Inland waters a moderate chop. A chance of showers and Thunderstorms.
Friday..East southeast winds 10 to 15 knots. Seas 2 to 4 feet. Inland waters a moderate chop. A chance of showers and Thunderstorms.
Friday night..Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Inland waters a light chop. A chance of showers and Thunderstorms.
Saturday..East winds 5 to 10 knots. Seas 2 to 3 feet. Inland waters a light chop. A chance of showers and Thunderstorms.
Saturday night..Southeast winds 5 to 10 knots. Seas 2 feet. Inland waters a light chop. A chance of showers and Thunderstorms.
Sunday..Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Inland waters a light chop. A chance of showers and Thunderstorms.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 921 Pm Edt Tue Aug 21 2018
Synopsis.. High pressure across the florida peninsula will weaken tonight as a cold front approaches from the west. The front will stall across north florida late Wednesday as high pressure builds toward the middle atlantic region. High pressure will build north of the waters this weekend with prevailing onshore flow.


7 Day Forecast for Marine Location Near St. Augustine, FL
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location: 29.88, -81.31     debug


Area Discussion for - Jacksonville, FL
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Fxus62 kjax 220142
afdjax
area forecast discussion
national weather service jacksonville fl
942 pm edt Tue aug 21 2018

Update
Diurnal convection has faded early this evening and expect mainly
fair skies and muggy conditions overnight in the west-southwest
steering flow ahead of approaching weak frontal boundary. Lows
will generally be in the 70s inland and near 80 along the coast.

The w-sw flow will generate showers along the big bend area
overnight and some of these will push inland to the i-75 corridor
in the gnv ocf area after midnight, but should remain weak. This
w-sw flow ahead of the weak front will likely start convection
early in the morning hours along the i-75 corridor over inland ne
fl and along the fl ga border and this will develop into scattered
showers and storms that will track eastward across NE fl and into
coastal SE ga by the mid-day and early afternoon hours with
continued storms forming along the weak boundary through the
afternoon hours. Warmer air pushing in aloft with this feature
will limit mid-level lapse rates but still expect a few storms to
become strong with gusty winds to 50 mph and frequent lightning.

Temps will reach into the lower 90s for MAX temps in the w-sw flow
and combined with dewpoints well into the mid-upper 70s will
create heat indices into the 100-105 range through the late
morning into the afternoon hours.

Aviation
Vfr with convective debris clouds overnight, light SW flow at the
surface will prevent much in the way of any fog formation towards
morning. Showers storms get a fairly early start by late morning
over far inland areas and for now have added vcts at all TAF sites
by 17z, but could be earlier at gnv if the gulf coast sea breeze
develops early.

Marine
South to southwest flow will increase close to 15 knots tonight
ahead of the approaching frontal boundary with seas 2-4 ft but
winds should remain less than small craft exercise caution conds.

Offshore moving storms with gusty winds and frequent lightning
expected again on Wednesday.

Preliminary point temps pops
Amg 74 92 72 92 10 10 0 10
ssi 77 89 76 88 10 40 20 20
jax 74 93 74 93 10 40 30 20
sgj 74 91 74 88 10 50 20 20
gnv 74 91 73 93 20 40 10 20
ocf 73 91 73 93 20 40 10 30

Jax watches warnings advisories
Fl... None.

Ga... None.

Am... None.

Hess shashy bricker


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SAUF1 - St. Augustine, FL 3 mi124 min S 6 G 7 78°F 78°F1018.4 hPa (-0.3)
RCYF1 14 mi34 min 88°F
41117 15 mi64 min 82°F1 ft
GTXF1 - Guana Tolomato Matanzas Reserve, FL 16 mi79 min SSW 2.9 75°F 1021 hPa74°F
LTJF1 35 mi34 min 79°F 74°F
MYPF1 - 8720218 - Mayport (Bar Pilots Dock), FL 36 mi34 min SSW 5.1 G 6 78°F 81°F1018.9 hPa
BLIF1 37 mi34 min S 7 G 8.9 80°F 1019.4 hPa80°F

Wind History for I-295 Bridge, St Johns River, FL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Northeast Florida Regional Airport, FL6 mi68 minS 410.00 miFair76°F75°F97%1018.8 hPa

Wind History from SGJ (wind in knots)
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Last 24hrCalmS3W3Calm--SW4SW4W4W3SW3SW4SW55SW5SW6SW4SE10SE11SE11--SW10S5S3S4
1 day agoS6SW4S4CalmS4SW5SW4SW4W5SW5SW5SW5SW4NW4CalmE9E9E10SE13SE11SE8W3W6SW3
2 days agoSW3NW6CalmCalmSW3SW5SW4W4W4W6W6W3W5NW33SE11SE11--SE12SE11SE14SE9S13W10

Tide / Current Tables for State Road 312, Matanzas River, Florida
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State Road 312
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Tue -- 02:42 AM EDT     Moonset
Tue -- 05:38 AM EDT     3.70 feet High Tide
Tue -- 06:56 AM EDT     Sunrise
Tue -- 11:37 AM EDT     0.36 feet Low Tide
Tue -- 04:50 PM EDT     Moonrise
Tue -- 06:18 PM EDT     4.46 feet High Tide
Tue -- 07:59 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.81.11.72.43.13.63.73.32.61.810.50.40.91.62.53.344.44.33.83.12.31.4

Tide / Current Tables for Crescent Beach, Matanzas River, Florida
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Crescent Beach
Click for Map
Tue -- 12:23 AM EDT     1.05 feet Low Tide
Tue -- 02:42 AM EDT     Moonset
Tue -- 06:09 AM EDT     3.99 feet High Tide
Tue -- 06:56 AM EDT     Sunrise
Tue -- 12:23 PM EDT     0.68 feet Low Tide
Tue -- 04:50 PM EDT     Moonrise
Tue -- 06:47 PM EDT     4.67 feet High Tide
Tue -- 07:59 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.11.21.72.333.643.83.22.51.81.20.70.81.52.33.13.94.54.74.33.632.3

Weather Map and Satellite Images
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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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Jacksonville, FL (22,6,7,8)
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Ground Weather Radar Station Jacksonville, FL
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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.