Monday, August21, 2017 L-36.com


Marine Weather and Tides
Crescent Beach, FL

Version 3.4
What's New / NOTES
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.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:55AMSunset 7:59PM Monday August 21, 2017 9:36 PM EDT (01:36 UTC) Moonrise 5:41AMMoonset 7:06PM Illumination 0% Phase: New Moon; Moon at 29 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- 300 Pm Edt Mon Aug 21 2017
Tonight..South southeast winds 5 to 10 knots. Seas 2 to 3 feet. Dominant period 9 seconds. Inland waters a light chop. A slight chance of showers and Thunderstorms in the evening.
Tuesday..Southeast winds 5 to 10 knots. Seas 2 to 4 feet. Dominant period 9 seconds. Inland waters smooth.
Tuesday night..South southwest winds 5 to 10 knots. Seas 2 to 4 feet. Dominant period 9 seconds. Inland waters a light chop. A slight chance of showers and Thunderstorms after midnight.
Wednesday..South southwest winds 5 to 10 knots becoming southeast 10 to 15 knots in the afternoon. Seas 2 to 4 feet. Dominant period 9 seconds. Inland waters a light chop. A chance of showers and Thunderstorms.
Wednesday night..South southwest winds 10 to 15 knots. Seas 2 to 4 feet. Inland waters a moderate chop. A chance of showers and Thunderstorms.
Thursday..South southwest winds 5 to 10 knots becoming south southeast 10 to 15 knots in the afternoon. Seas 2 to 3 feet. Inland waters a light chop. A chance of showers and Thunderstorms.
Thursday night..South southwest winds 10 to 15 knots. Seas 2 to 4 feet. Inland waters a moderate chop. Showers and Thunderstorms likely.
Friday..South southeast winds 5 to 10 knots becoming east in the afternoon. Seas 2 to 3 feet. Inland waters a light chop. Showers and Thunderstorms likely.
Friday night..East northeast winds 10 to 15 knots. Seas 2 to 3 feet. Inland waters a moderate chop. A chance of showers and Thunderstorms.
Saturday..Northeast winds 15 to 20 knots. Seas 2 to 3 feet. Inland waters choppy. A chance of showers and Thunderstorms.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 300 Pm Edt Mon Aug 21 2017
Synopsis.. High pressure will be to the northeast tonight, and to the east Tuesday and Wednesday. A tropical wave may move to the east of area waters wenesday. High pressure will build to the southeast Thursday, with a cold front reaching the se ga waters. This front will sink further south across area waters Friday into Saturday.

7 Day Forecast for Marine Location Near Crescent Beach, FL
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location: 29.72, -81.24     debug


Area Discussion for - Jacksonville, FL
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Fxus62 kjax 211902
afdjax
area forecast discussion
national weather service jacksonville fl
302 pm edt Mon aug 21 2017

Near term through Tuesday
Scattered to numerous showers with embedded thunderstorms this
afternoon in response to the combination of diurnal heating,
boundary interactions and a weak trough. Much of the convection will
dissipate by sunset, with a few showers lingering till around
midnight. Clouds will diminish overnight, with patchy fog developing
well inland. High pressure ridge that is to the northeast today,
will be to the east of NE fl on Tuesday. The ridging is expected to
provide subsidence across NE fl limiting convective potential, with
chances for convection for SE ga. Temperatures will trend above
normal this period.

Short term Tuesday night-Thursday
Weak trof of surface low pressure will extend from the carolinas
and south ga southward through the fl peninsula during this
period. While weak high pressure ridge will exist aloft overhead.

Drier airmass in place Tuesday night will lead to fairly quiet
conditions with fair skies and muggy conditions and temps in the
mid upper 70s. Airmass will slowly moisten through the period with
near climo scattered diurnal showers storms on Wednesday building
to scattered to numerous showers storms by Thursday with best
chances across SE ga. Very weak steering motion either light and
variable or out of the W SW will promote locally heavy rainfall as
the storm motion will remain around 10 mph or less and mid level
temps remain fairly warm around -5c -6c so severe storms are not
expected but a few strong storms are possible with gusty winds and
frequent lightning as atlc gulf coast sea breeze fronts move
slowly inland each day. Warmer than normal MAX temps are expected
with highs in the lower middle 90s inland each day and near 90 at
the coast. Heat indices will top out near 105 degrees each
afternoon prior to the start of convection.

Long term Friday-Monday
Long-range models still struggling with handling of slow moving
disturbance over the SE bahamas that will track slowly NW and
possibly develop into a weak TC by late in the week into the
weekend off the florida east coast and track NE of the region by
by early next week. At this time it appears as though NE fl SE ga
will be on the north or northwest side of this circulation with
surface northeast flow developing off the atlantic and while this
will keep abundant moisture over the region with at least
scattered to numerous showers and storms mainly during the
afternoon and evening hours and mainly along the coast. Higher
confidence that daytime maximum temps will come down from the
lower 90s on Friday to the mid upper 80s over the weekend into
early next week. Much lower confidence in the organization of any
heavy rainfall bands that may impact the region especially along
the coast but it remains a possibility and will need to be
monitored, with higher chances if a more significant TC develops.

Aviation
Convection is expected to dissipate across area TAF sites by sunset,
with conditions trending towardVFR this evening. Inland fog
formation will be possible tonight, with restrictions possible at
kgnv. Convection will be possible Tuesday afternoon, mainly over
se ga, which could affect kssi later in the day.

Marine
High pressure will be to the northeast tonight, and to the east
Tuesday and Wednesday. A tropical wave may move to the east of
area waters Wednesday. High pressure will build to the southeast
Thursday, with a cold front reaching the SE ga waters. This front
will sink further south across area waters Friday into Saturday.

Rip currents: low to moderate risk in the weak onshore flow with
daily sea breezes.

Preliminary point temps pops
Amg 74 92 74 94 20 50 20 50
ssi 76 87 77 90 20 20 20 40
jax 74 91 75 93 30 10 10 40
sgj 76 91 76 91 20 10 10 30
gnv 72 94 73 94 30 10 10 30
ocf 72 95 73 94 30 10 0 30

Jax watches warnings advisories
Fl... None.

Ga... None.

Am... None.

Struble hess corless


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
GTXF1 - Guana Tolomato Matanzas Reserve, FL 4 mi112 min E 4.1 84°F 1021 hPa78°F
SAUF1 - St. Augustine, FL 10 mi37 min E 6 G 6 83°F 82°F1020.7 hPa (+0.6)77°F
RCYF1 17 mi49 min 87°F
41117 21 mi45 min 84°F2 ft
BKBF1 40 mi49 min E 6 G 7 80°F 87°F
LTJF1 47 mi49 min 81°F 77°F
MYPF1 - 8720218 - Mayport (Bar Pilots Dock), FL 48 mi49 min ESE 2.9 G 4.1 81°F 84°F1020.7 hPa
JXUF1 48 mi49 min 87°F
BLIF1 49 mi49 min ENE 4.1 G 4.1 81°F 1021.3 hPa81°F
DMSF1 49 mi49 min 87°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, FL18 mi41 minE 510.00 miA Few Clouds83°F77°F82%1020.6 hPa

Wind History from SGJ (wind in knots)
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Last 24hrSE6SE3CalmCalmSW3W4CalmCalmCalmCalmNE4E7E8E9SE10E11SE10SE8N5N8--N7NE6E5
1 day agoSW3SW3W3Calm--S5S5S5SW3CalmCalmSW343E8SE10SE11SE11SE16SE12SE10SE12SE7S8
2 days agoW4SW6SW7W6SW5W5W6CalmSW4SW4W4SW7SW64N3E9SE10SE11SE13SE13SE11SE12SE7S5

Tide / Current Tables for Fort Matanzas, Matanzas River, ICWW, Florida
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Fort Matanzas
Click for Map
Mon -- 03:32 AM EDT     -0.35 feet Low Tide
Mon -- 06:40 AM EDT     Moonrise
Mon -- 06:56 AM EDT     Sunrise
Mon -- 09:09 AM EDT     4.38 feet High Tide
Mon -- 02:31 PM EDT     New Moon
Mon -- 03:45 PM EDT     -0.64 feet Low Tide
Mon -- 07:59 PM EDT     Sunset
Mon -- 08:06 PM EDT     Moonset
Mon -- 09:37 PM EDT     4.93 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.61.40.4-0.3-0.20.51.733.94.44.23.62.51.40.3-0.5-0.60.11.32.844.84.94.4

Tide / Current Tables for Bings Landing, Matanzas River, Florida
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Bings Landing
Click for Map
Mon -- 05:36 AM EDT     0.51 feet Low Tide
Mon -- 06:40 AM EDT     Moonrise
Mon -- 06:56 AM EDT     Sunrise
Mon -- 11:12 AM EDT     2.00 feet High Tide
Mon -- 02:31 PM EDT     New Moon
Mon -- 05:40 PM EDT     0.33 feet Low Tide
Mon -- 07:58 PM EDT     Sunset
Mon -- 08:06 PM EDT     Moonset
Mon -- 11:55 PM EDT     2.33 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.21.91.61.30.90.60.50.81.21.51.821.91.71.310.70.40.40.611.51.92.2

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Southeast    EDIT
Geos

Wind Forecast for Jacksonville, FL (21,6,7,8)
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Ground Weather Radar Station Jacksonville, FL
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weather_mapweather_map weather_map

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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.