Saturday, April20, 2019 L-36.com


Marine Weather and Tides
Sawgrass, FL

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:51AMSunset 7:57PM Saturday April 20, 2019 4:53 AM EDT (08:53 UTC) Moonrise 8:25PMMoonset 6:55AM Illumination 99% Phase: Full Moon; Moon at 16 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 Expires:201904201545;;203457 Fzus52 Kjax 200736 Cwfjax Coastal Waters Forecast For Northeast Florida/southeast Georgia National Weather Service Jacksonville Fl 336 Am Edt Sat Apr 20 2019 Atlantic Coastal Waters From Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm. Seas Are Provided As A Range Of The Average Height Of The Highest 1/3 Of The Waves, Along With The Occasional Height Of The Average Highest 1/10 Of The Waves. Amz450-452-454-201545- 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- 336 Am Edt Sat Apr 20 2019
.small craft advisory in effect through this evening...
Today..West southwest winds 15 to 20 knots. Seas 2 to 4 feet. Dominant period 6 seconds. Inland waters a moderate chop.
Tonight..West winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 8 seconds. Inland waters a light chop.
Sunday..West winds 5 to 10 knots becoming southwest in the evening. Seas 2 to 3 feet. Dominant period 8 seconds. Inland waters a light chop.
Sunday night..West northwest winds around 5 knots becoming north northwest in the morning. Seas 2 to 3 feet. Dominant period 8 seconds. Inland waters smooth.
Monday and Monday night..East winds 5 to 10 knots. Seas 2 to 3 feet. Inland waters mostly smooth.
Tuesday..North northeast winds around 5 knots becoming east northeast in the afternoon. Seas 2 to 3 feet. Inland waters smooth.
Tuesday night..East southeast winds around 5 knots becoming south southwest after midnight. Seas 2 to 3 feet. Inland waters smooth.
Wednesday..Southwest winds around 5 knots becoming south southeast in the afternoon. Seas 2 to 3 feet. Inland waters smooth.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 336 Am Edt Sat Apr 20 2019
Synopsis.. With the frontal boundary having passed through away from nearshore waters off to the east, high pressure will begin to settle over the region resulting in clearing skies and dry conditions. Winds will remain at small craft advisory levels until later tonight, blowing away from the shoreline out of the sw-w. High pressure will continue to dominate the region through the weekend and into the middle of next week.
Gulf stream.. The approximate location of the west wall of the gulf stream as of apr 20, 2019 at 1200 utc... 56 nautical miles east of flagler beach. 63 nautical miles east of saint augustine beach. 76 nautical miles east of jacksonville beach. 92 nautical miles east of st simons island. This data courtesy of the naval oceanographic office.


7 Day Forecast for Marine Location Near Sawgrass CDP, FL
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location: 30.19, -81.36     debug


Area Discussion for - Jacksonville, FL
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Fxus62 kjax 200741
afdjax
area forecast discussion
national weather service jacksonville fl
341 am edt Sat apr 20 2019

Near term Today and tonight...

with the frontal passage moving off to the east, high pressure and
cool dry air will build in over the region today and tonight.

Conditions are expected to be breezy and cool today, with winds
becoming gustier later in the morning and then dropping off later
in the evening, with wind gusts reaching upwards of 30 mph during
peak afternoon heating. Slight chance for isolated showers to move
across florida this morning and tomorrow morning, with high
temperatures for the day reaching up into the 60s and very low
70s. Overnight low temperatures are expected to drop into the
upper 40s and low 50s.

Short term Sunday and Monday...

synopsis... A warming trend with dry conditions under mostly clear
skies. Temperatures moderating near normal by Monday.

Surface high pressure across the northern gulf of mexico Sunday
builds ene toward the SE atlantic seaboard through Monday. Sunday
elevated wnw winds continue across SE ga with speeds 10-15 mph and
gusts near 15-20 mph in the morning, with lighter flow across ne
fl under the influence of the surface ridge. The east coast sea
breeze will develop and shift inland generally south of mayport
Sunday afternoon. As the ridge builds over SE ga into Sunday
night, winds decouple inland. Given the the combination of the dry
low level airmass in place, clear skies and near calm winds,
trended low temperatures lower than MOS guidance with mid 40s
inland to mid 50s toward the st. Johns river basin and coast.

Light onshore flow begins to develop Monday as an upper ridge
builds aloft, moderating temperatures further and returning
shallow low level moisture. Conditions not favorable for fog
Sunday night, but some shallow ground fog possible late Monday
night toward sunrise Tuesday mainly inland.

High temperatures will trend a few degrees below normal Sunday in
the mid upper 70s. Lows Sunday night will trend below normal
inland in the 40s to mid 50s coast. Temperatures moderate to near
normal values Monday around 80 inland, with lows Monday night in
the low mid 50s.

Long term Tuesday through Friday...

continued dry through Thursday with temperatures warming back
above normal values. Rain chances increase from west to east late
Thursday through Friday with approach and passage of next surface
cold front. Gfs40 ECMWF not in good agreement with next system
with both synoptic structure and precipitation timing
discrepancies. Environment will support a return of thunderstorm
potential, with potentially strong thunderstorms Friday.

Aviation
PredominantlyVFR conditions today with partly cloudy skies and
winds out of the sw-w. Winds will build in speed to about 15-25
knots later the morning and then drop off later on in the evening.

Marine
With the frontal boundary having passed through away from
nearshore waters off to the east, high pressure will begin to
settle over the region resulting in clearing skies and dry
conditions. Winds will remain at small craft advisory levels until
later tonight, blowing away from the shoreline out of the sw-w.

High pressure will continue to dominate the region through the
weekend and into the middle of next week.

Rip currents: moderate risk for florida beaches

Fire weather
Today: breezy west winds gusting between 20-30 mph by late
morning. Very high dispersion.

Sunday: elevated fire danger due to high dispersion and
critically low humidity 20-30% all zones. Wind NW and elevated in
the morning 10-15 mph across SE ga, then winds decrease into the
afternoon as humidity falls.

Preliminary point temps pops
Amg 65 49 76 47 0 0 0 0
ssi 68 55 73 56 0 0 0 0
jax 69 51 76 50 0 0 0 0
sgj 71 53 76 55 0 0 0 0
gnv 68 49 77 47 10 0 0 0
ocf 69 50 77 47 30 10 0 0

Jax watches warnings advisories
Fl... None.

Ga... None.

Am... Small craft advisory until 5 am edt Sunday 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.

Gale warning until 5 am edt early this morning 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 11 pm edt this evening 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.

Corless enyedi


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LTJF1 14 mi35 min 60°F
MYPF1 - 8720218 - Mayport (Bar Pilots Dock), FL 15 mi35 min W 9.9 G 11 59°F 71°F1009.8 hPa
BLIF1 16 mi35 min W 7 G 12 59°F 1010.9 hPa50°F
41117 20 mi53 min 72°F4 ft
SAUF1 - St. Augustine, FL 24 mi53 min SW 1.9 G 1.9 58°F 72°F1010.2 hPa (-0.7)52°F
RCYF1 29 mi35 min 74°F
FRDF1 - 8720030 - Fernandina Beach, FL 34 mi35 min S 2.9 G 5.1 59°F 71°F1010.1 hPa
41112 - Offshore Fernandina Beach, FL (132) 36 mi53 min 68°F3 ft
GTXF1 - Guana Tolomato Matanzas Reserve, FL 37 mi68 min SSW 1.9 59°F 1011 hPa57°F

Wind History for I-295 Bridge, St Johns River, FL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Jacksonville Craig Municipal Airport, FL13 mi60 minW 310.00 miFair58°F48°F72%1009.5 hPa
Mayport Naval Station - Adm David L. McDonald Field, FL14 mi61 minWSW 810.00 miFair59°F48°F67%1009.4 hPa
Northeast Florida Regional Airport, FL15 mi57 minN 010.00 miFair56°F53°F90%1010.2 hPa
Jacksonville Naval Air Station, FL17 mi60 minSW 510.00 miPartly Cloudy58°F48°F72%1009.4 hPa

Wind History from CRG (wind in knots)
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Last 24hrSE7S10S15
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1 day agoCalmCalmCalmCalmS5S11
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2 days agoCalmCalmCalmCalmE3E6SE5E74SE7
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Tide / Current Tables for Palm Valley, ICWW, Florida
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Palm Valley
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Sat -- 05:42 AM EDT     -2.84 feet Low Tide
Sat -- 06:53 AM EDT     Sunrise
Sat -- 07:55 AM EDT     Moonset
Sat -- 12:14 PM EDT     2.10 feet High Tide
Sat -- 05:59 PM EDT     -3.10 feet Low Tide
Sat -- 07:55 PM EDT     Sunset
Sat -- 09:25 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.62.31.30.2-1.2-2.5-2.8-1.9-0.80.111.72.11.91.20.1-1.1-2.4-3.1-2.5-1.2-0.111.9

Tide / Current Tables for St. Johns River Entrance, Florida Current
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St. Johns River Entrance
Click for Map
Sat -- 02:39 AM EDT     -2.67 knots Max Ebb
Sat -- 06:18 AM EDT     0.00 knots Slack
Sat -- 06:53 AM EDT     Sunrise
Sat -- 07:54 AM EDT     Moonset
Sat -- 08:51 AM EDT     2.33 knots Max Flood
Sat -- 11:49 AM EDT     -0.00 knots Slack
Sat -- 02:32 PM EDT     -2.42 knots Max Ebb
Sat -- 06:11 PM EDT     0.00 knots Slack
Sat -- 07:56 PM EDT     Sunset
Sat -- 09:03 PM EDT     2.85 knots Max Flood
Sat -- 09:26 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.8-2.1-2.6-2.7-2.4-1.7-0.412.12.321.1-0.3-1.7-2.3-2.4-2.1-1.4-0.31.22.42.82.61.8

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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Wind Forecast for Jacksonville, FL (4,6,7,8)
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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.