Friday, June23, 2017 L-36.com


Marine Weather and Tides
St. Augustine South, FL

Version 3.4
What's New / NOTES
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 6:24AMSunset 8:29PM Friday June 23, 2017 4:52 PM EDT (20:52 UTC) Moonrise 5:02AMMoonset 7:07PM 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- 333 Pm Edt Fri Jun 23 2017
.small craft exercise caution...
Tonight..South winds 15 to 20 knots...shifting to the southwest late. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 5 seconds. Inland waters a moderate chop.
Saturday..South southeast winds 15 to 20 knots. Seas 2 to 4 feet. Dominant period 7 seconds. Inland waters a light chop. A slight chance of showers and Thunderstorms in the afternoon.
Saturday night..South southwest winds 15 to 20 knots. Seas 2 to 4 feet. Dominant period 5 seconds. Inland waters a moderate chop. A slight chance of showers and Thunderstorms in the evening.
Sunday..South southwest winds around 10 knots becoming south southeast in the afternoon. Seas 2 to 4 feet. Dominant period 8 seconds. Inland waters a light chop. A chance of showers and a slight chance of Thunderstorms in the morning, then showers and Thunderstorms likely in the afternoon.
Sunday night..South winds 10 to 15 knots becoming west southwest after midnight. Seas 2 to 4 feet. Inland waters a moderate chop. Showers and Thunderstorms likely.
Monday..Northwest winds around 10 knots becoming north northeast in the afternoon. Seas 2 to 3 feet. Inland waters a light chop. Showers and Thunderstorms likely.
Monday night..North northeast winds 5 to 10 knots becoming northwest after midnight. Seas 2 to 3 feet. Inland waters a light chop. A chance of showers and a slight chance of Thunderstorms.
Tuesday..North winds 5 to 10 knots becoming east northeast in the afternoon. Seas 2 to 3 feet. Inland waters a light chop. A chance of showers and a slight chance of Thunderstorms.
Tuesday night..East northeast winds 10 to 15 knots. Seas 2 to 4 feet. Inland waters a moderate chop. A slight chance of showers and Thunderstorms.
Wednesday..East northeast winds 15 to 20 knots. Seas 2 to 4 feet. Inland waters a moderate chop. A chance of showers and a slight chance of Thunderstorms.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 333 Pm Edt Fri Jun 23 2017
Synopsis.. Surface ridge axis will shift south into central florida through the weekend. Southerly flow expected through the weekend with breezy southeast to south winds expected. A frontal boundary will push into the region Sunday night through Monday and stall across or just south of the region through the middle of the week.

7 Day Forecast for Marine Location Near St. Augustine South CDP, FL
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location: 29.87, -81.31     debug


Area Discussion for - Jacksonville, FL
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Fxus62 kjax 231933
afdjax
area forecast discussion
national weather service jacksonville fl
330 pm edt Fri jun 23 2017

Near term tonight-Saturday ...

tonight... Deep layer ridging across the northeast gulf of mexico to
the western atlc is expected to drift southward as shortwave trough
pushes across the tn valley and lower ms valley. The shortwave
expected to shear out as it bumps into the fairly strong ridge over
the wern atlc. Low level flow is therefore expected to veer a bit to
the southwest overnight with increased winds above the sfc...

especially over the local atlc waters. In the evening... Weak
convergence and daytime heating will lead to very isolated showers
and storms over the inland areas from inland SE ga to near baker
county and south into marion county. This activity is largely going
to be weak owing to warm temps subsidence inversion around 750 mb
making convective updrafts weak. Deep convection should be
dissipated by 11pm-midnight. Overnight lows in the lower to mid 70s
similar to last night. Model soundings and SREF indicate stratus and
possible fog over the suwannee valley and possible up into the
statenville and homerville area early Saturday morning and included
in the latest forecast. This should dissipate quickly Sat morning.

Saturday... Low to mid level ridge axis will be across central fl
while shortwave trough progresses slowly eastwards over the carolinas
and northern ga. Associated sfc cold front will only gradually move
east to a line from central nc to north central ga by 00z sun.

Prefrontal trough expected to develop over coastal ga plain to
inland NE fl during the aftn. Combination of diurnal heating and sea
breezes and sfc troughing will lead to isolated to scattered showers
and storms Saturday aftn. Two main areas of possibly scattered
deeper convection... One over the SRN zones from around ocala to
flagler beach and the other up over SE ga north of a line from
pearson to jesup as possible outflow and deeper moisture pooling
into that area. Elsewhere, subsidence will greatly limit convective
potential and advertised rain chances of 20% or less due to
subsidence aloft. Temperatures will be hot with highs in the low mid
90s inland to near 90 along the atlantic coast under the prevailing
southwesterly low level flow. Heat index values will near 105
inland.

Short term Saturday night thru Sunday night
Sat night... Ridge axis across north fl continues to weaken with the
approach of cold front through the SE u.S. And some pre-frontal
showers and storms will be possible through the evening and
overnight hours across inland SE ga, and with mid-level flow
increasing there could be a few strong storms with gusty winds.

Elsewhere partly cloudy skies with muggy overnight lows in the
lower middle 70s inland and upper 70s at the coast.

Sunday... Ridge axis gets suppressed further southward into
central south fl while moisture from weakening cold front will
interact with both sea breeze fronts pushing inland. Enough sunshine
before storm activity will still push MAX temps into the lower 90s
most areas with heat indices still reaching 100-105. Numerous storms
are expected to break out along with sea breeze fronts and with sw
steering flow storm motion will be back towards the east coast and
high rain chances will exist from the u.S. 301 corridor all the way
through the atlc coastal counties and interaction with the atlc
coast sea breeze in this area along with some mid level cooling will
allow for a few isolated severe storms with damaging winds the main
threat.

Sun night... Band of frontal moisture lays out across all of NE fl se
ga and expect scattered showers and isolated storms to linger
through the evening and fade after midnight but cant rule out precip
throughout the overnight hours. Rain cooled temps generally
lingering in the lower to middle 70s through the night under mostly
cloudy skies.

Long term Monday-Friday
Monday... Despite the abundant cloud cover a mid level trof digging
over the SE u.S. Will give a bit of energy cooling aloft over the
region to allow for above normal rain chances to continue along the
old frontal moisture boundary which will sag into NE fl and interact
with afternoon sea breezes and enough diurnal heating from filtered
sunshine to reach the upper 80s (maybe 90f) and expect at least
numerous shower storms from the fl ga border south through NE fl and
while a few isolated strong severe storms with damaging winds will
remain possible due to increased mid-level lapse rates, expect slow
storm motion will also help to increase the locally heavy rainfall
threat, especially in areas that already received heavy rainfall on
Sunday.

Tuesday... Mid level trof will move off the SE u.S. Coast and just
enough push of drier air from the NW will push into SE ga where only
isolated showers and storms are expected while scattered showers and
storms will re-ignite during daytime heating over NE fl as surface
and steering flow become out of the NE and will result in below
normal MAX temps in the middle upper 80s.

Wednesday... Sfc high pressure will build into the carolinas and
expect breezy onshore E NE flow off the atlantic and below normal
rain chances with SE ga mainly dry and some diurnal scattered
showers isolated storms across NE fl, but overall story will be the
cooler temps at the coast with highs in the mid 80s there and upper
80s further inland.

Thu fri... Sfc high pressure ridge builds offshore into the WRN atlc
and this will veer the steering flow towards the SE and allow for
more of the old frontal moisture south of the region to lift back
northward across all of NE fl SE ga and will trend back towards
normal to above normal diurnal scattered to numerous showers storms.

The onshore flow will keep MAX temps in the middle 80s at the
beaches while inland areas will get back closer to normal values in
the upper 80s near 90 each day.

Aviation
Sct-lcl broken CIGS around 4-6kft rest of today. Have continued to
not mention any shower or tsra in tafs at this time due to very low
probabilities. Breezy winds from the south-southeast at the coastal
tafs will continue through the evening before veering back around
to the southwest and decreasing. A chance of stratus after 08z-
13z over the suwannee valley area and may just miss the gnv
terminal. Thus no mention of stratus for gnv at this time. Any
isolated convection at terminals on Saturday not likely until after
18z.

Marine Breezy southerly winds this evening will maintain scec
for all area waters... With GFS and NAM showing 1000 mb south
winds of 20-25 kt... And seas pushing up to 4-6 ft offshore
waters... About 3-5 ft nearshore. Winds and seas will be on a
decreasing trend 06z-12z sat. A weak front will push into the
waters late Sunday night into Monday and this will bring light and
variable winds through mid-week.

Rip currents: moderate risk continues with breezy southeast winds
and 2-3 ft breakers.

Preliminary point temps pops
Amg 73 93 74 91 20 30 30 70
ssi 78 90 77 88 10 10 20 70
jax 74 93 74 91 10 20 10 70
sgj 74 90 75 90 10 20 20 50
gnv 73 92 73 91 10 30 10 60
ocf 72 91 73 92 20 30 10 50

Jax watches warnings advisories
Fl... None.

Ga... None.

Am... None.

Shashy hess


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SAUF1 - St. Augustine, FL 3 mi52 min SE 11 G 13 79°F 81°F1016.8 hPa (-1.1)75°F
RCYF1 14 mi52 min 88°F
41117 15 mi60 min 80°F3 ft
GTXF1 - Guana Tolomato Matanzas Reserve, FL 15 mi67 min SE 9.9 85°F 1018 hPa76°F
BKBF1 30 mi52 min SSE 5.1 G 8 90°F 89°F
LTJF1 36 mi52 min 86°F 74°F
MYPF1 - 8720218 - Mayport (Bar Pilots Dock), FL 37 mi52 min SSE 11 G 17 84°F 84°F1016.6 hPa (-1.3)
JXUF1 37 mi52 min 87°F
BLIF1 38 mi52 min SE 8 G 12 88°F 1016.9 hPa (-1.2)75°F
DMSF1 38 mi52 min 85°F
NFDF1 40 mi52 min S 5.1 G 8.9 91°F 1016.6 hPa (-1.5)70°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, FL7 mi56 minSE 1510.00 miPartly Cloudy87°F75°F67%1016.5 hPa

Wind History from SGJ (wind in knots)
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Last 24hrSE13
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1 day agoSE16
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CalmSE3CalmSE3SE4S4SE5S7S9S8E11SE11SE11SE13SE14SE14
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Tide / Current Tables for State Road 312, Matanzas River, Florida
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State Road 312
Click for Map
Fri -- 02:41 AM EDT     -0.35 feet Low Tide
Fri -- 06:02 AM EDT     Moonrise
Fri -- 06:25 AM EDT     Sunrise
Fri -- 08:38 AM EDT     4.54 feet High Tide
Fri -- 02:41 PM EDT     -0.85 feet Low Tide
Fri -- 08:06 PM EDT     Moonset
Fri -- 08:29 PM EDT     Sunset
Fri -- 09:13 PM EDT     5.83 feet High Tide
Fri -- 10:32 PM EDT     New Moon
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.10.8-0.1-0.30.31.42.63.74.44.53.92.81.50.2-0.6-0.8-0.11.32.84.25.35.85.64.7

Tide / Current Tables for Crescent Beach, Matanzas River, Florida
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Crescent Beach
Click for Map
Fri -- 03:38 AM EDT     -0.57 feet Low Tide
Fri -- 06:02 AM EDT     Moonrise
Fri -- 06:25 AM EDT     Sunrise
Fri -- 09:17 AM EDT     3.87 feet High Tide
Fri -- 03:43 PM EDT     -0.96 feet Low Tide
Fri -- 08:06 PM EDT     Moonset
Fri -- 08:29 PM EDT     Sunset
Fri -- 09:51 PM EDT     5.06 feet High Tide
Fri -- 10:32 PM EDT     New Moon
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.51.50.5-0.4-0.50.21.32.43.33.83.72.91.80.90-0.7-0.9-0.21.22.73.94.854.6

Weather Map and Satellite Images
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Weather Map
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IR Satellite Image from GEOS
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GOES Local Image of Southeast    EDIT
Geos

Wind Forecast for Jacksonville, FL (16,3,4,5)
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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.