Tuesday, September25, 2018 L-36.com

Marine Weather and Tides
Neptune Beach, FL

Version 3.4
What's New / NOTES
9/17/2018 XTide broke when 1and1 "upgraded" my server. It has been esculated. I am sorry for the problem.

Sunrise 7:14AMSunset 7:19PM Tuesday September 25, 2018 8:36 AM EDT (12:36 UTC) Moonrise 7:01PMMoonset 6:36AM Illumination 100% Phase: Full Moon; Moon at 15 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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AMZ452 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- 255 Am Edt Tue Sep 25 2018
Today..East winds 5 to 10 knots. Seas 2 to 4 feet. Dominant period 8 seconds. Inland waters smooth. A chance of showers in the morning. A slight chance of Thunderstorms. A slight chance of showers in the afternoon.
Tonight..South winds 5 to 10 knots. Seas 2 to 4 feet. Dominant period 8 seconds. Inland waters a light chop. A slight chance of showers after midnight.
Wednesday..South southwest winds around 5 knots becoming southeast in the afternoon. Seas 2 to 4 feet. Dominant period 8 seconds. Inland waters smooth. A slight chance of showers and Thunderstorms in the afternoon.
Wednesday night..South southwest winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 8 seconds. Inland waters a moderate chop. A chance of showers and a slight chance of Thunderstorms.
Thursday..South southwest winds 5 to 10 knots becoming south southeast in the afternoon. Seas 2 to 3 feet. Inland waters a light chop. A chance of showers and a slight chance of Thunderstorms.
Thursday night..South winds 10 to 15 knots. Seas 2 to 4 feet. Inland waters a moderate chop. A chance of showers and a slight chance of Thunderstorms.
Friday and Friday night..Southeast winds 5 to 10 knots. Seas 2 to 4 feet. Inland waters mostly smooth.
Saturday..East southeast winds 5 to 10 knots. Seas 2 to 4 feet. Inland waters a light chop. A slight chance of showers and Thunderstorms.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 255 Am Edt Tue Sep 25 2018
Synopsis.. Area of low pressure to the northeast continues to move away from local waters today as an area of high pressure builds over the region. High pressure persists through the week as a front attempts to push into the local area by the end of the week or weekend before dissipating.

7 Day Forecast for Marine Location Near Neptune Beach, FL
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location: 30.31, -81.43     debug

Area Discussion for - Jacksonville, FL
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Fxus62 kjax 250702
area forecast discussion
national weather service jacksonville fl
302 am edt Tue sep 25 2018

Above average warmth continues...

Near term Through tonight...

scattered marine cumulus moving ashore this morning with isolated
showers possible along the immediate coast. Seeing a few places
with a slight reduction in visibility from a shallow fog layer but
no widespread issues at this time. Ridge of high pressure to the
east continues to promote easterly flow. Invest 98l moves north
along the western edge of the ridge and away from the area. For
this afternoon, less coverage in way of showers and thunderstorms
as drier air filters in from the east, especially along the coast.

Weak easterly flow still present today so expecting showers to
initially start along the i-95 corridor before slowly working
inland. Best chance for thunder will also be inland (i-75
corridor) during the afternoon hours. Coastal areas then become
dry from late afternoon through evening as an area of below
average moisture (pwat <1.5 inches) settles in along the coast.

More efficient moisture content (pwat 1.6 to 1.9 inches) remains
inland so isolated to scattered convection expected there.

Tonight, the western periphery of the ridge extends over the
peninsula leading to a dry conditions overnight.

Temperatures remain above average with upper 80s lower 90s along
the coast and lower to mid 90s inland. Heat indices between
100-104 inland as well so despite a couple hours of less heating,
much of the area will see the heat continue.

Short term Wednesday through Friday ...

ridging aloft and at the surface will persist over the adjacent
western atlantic during the period. The western third of the
upper ridge will build over the region this mid and end week. A
cold front will migrate over northern georgia, central alabama and
southern central mississippi. For the most part this pattern will
result in a prevailing warm and moist southerly flow, with mainly
diurnally driven scattered storms, with highs in the lower 90s,
lows in the lower to mid 70s. By Friday, as 850-500 mb high
bisects the region along the fl ga border, steering winds will be
swly across southeast ga pushing the storms back toward the coast
for evening storms near the golden isles.

Long term Friday night through Monday ...

high pressure will be stacked across the region this weekend
keeping a deep easterly steering flow in place across northeast
florida and southeast georgia. This pattern is expected to yield
isolated to widely scattered coastal showers during the morning
hours. The convective activity will transition inland through the
afternoon, with storms increasing to scattered areal coverage and
strengthening due to diurnal influences.

Temperatures will be coolest inland at night, and warmest at the
coast. The opposite is expected in the afternoons. This is mainly
due to the water temperatures in the 80s, with onshore flow pushing
relatively milder air off the atlantic at night, and relatively
cooler air in during the day. Hence, little change in day to day
temps given the persistent easterly flow.

Marine cumulus causing few-sct ceilings of MVFR criteria for
coastal TAF sites this morning. As weak easterly flow less than 10
knots continues today, will see a few showers near coastal taf
sites before drying out in the afternoon. Best chance of seeing
thunder inland near gnv so vcts in tafs given low probability.

Everyone dry through the overnight hours.

With high pressure to the northeast, light easterly flow continues
over the waters along with isolated showers. Pressure gradient
stays weak throughout the week keeping wave heights of 3-5 feet. A
front attempts to push south into the area during the weekend, but
is expected to dissipate before affecting the waters.

Rip currents: moderate risk for all area beaches. Long period
swells of 8 to 9 seconds and onshore flow persist today.

Preliminary point temps pops
Amg 91 72 92 73 30 10 40 40
ssi 86 76 89 76 30 10 20 30
jax 90 73 91 74 30 0 40 40
sgj 88 75 89 75 30 10 30 10
gnv 93 73 92 73 30 20 40 20
ocf 92 73 92 72 30 20 40 30

Jax watches warnings advisories
Fl... None.

Ga... None.

Am... None.

Mcginnis cordero

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LTJF1 5 mi37 min 82°F 76°F
MYPF1 - 8720218 - Mayport (Bar Pilots Dock), FL 6 mi37 min 82°F 85°F1020 hPa (+1.2)
BLIF1 8 mi37 min 80°F 1020.6 hPa (+1.2)80°F
DMSF1 9 mi37 min 85°F
FRDF1 - 8720030 - Fernandina Beach, FL 25 mi37 min 83°F 85°F1020.6 hPa (+1.4)
41112 - Offshore Fernandina Beach, FL (132) 29 mi37 min 85°F3 ft
SAUF1 - St. Augustine, FL 33 mi37 min SE 6 G 8 82°F 83°F1019.5 hPa (+1.1)
RCYF1 36 mi37 min 85°F
GTXF1 - Guana Tolomato Matanzas Reserve, FL 46 mi52 min Calm 76°F 1020 hPa74°F

Wind History for I-295 Bridge, St Johns River, FL
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1 day
2 days

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Jacksonville Craig Municipal Airport, FL5 mi44 minN 07.00 miFair75°F75°F100%1019.4 hPa
Mayport Naval Station - Adm David L. McDonald Field, FL6 mi45 minSE 410.00 miA Few Clouds82°F75°F79%1019.2 hPa
Jacksonville Naval Air Station, FL14 mi44 minN 010.00 miA Few Clouds80°F75°F87%1019.2 hPa
Jacksonville International Airport, FL19 mi1.7 hrsN 010.00 miPartly Cloudy74°F73°F97%1018.8 hPa
Northeast Florida Regional Airport, FL24 mi1.7 hrsN 010.00 miA Few Clouds76°F73°F91%1018.8 hPa

Wind History from CRG (wind in knots)
Last 24hrE6E8E10SE8
1 day agoCalmSE7SE5E7SE76E8E8
2 days agoN3NE4NE6E8SE9E10E10E9E9E12E9E5E4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm

Tide / Current Tables for Pablo Creek, ICWW bridge, St. Johns River, Florida
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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 St. Johns River Entrance, Florida Current
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Weather Map and Satellite Images
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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 (8,2,3,4)
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Ground Weather Radar Station Jacksonville, FL
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weather_mapweather_map weather_map

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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 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.