Thursday, March30, 2017 L-36.com


Marine Weather and Tides
Sawgrass, FL

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 7:14AMSunset 7:44PM Thursday March 30, 2017 8:28 PM EDT (00:28 UTC) Moonrise 8:16AMMoonset 9:43PM Illumination 13% Phase: Waxing Crescent; Moon at 3 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- 243 Pm Edt Thu Mar 30 2017
.small craft exercise caution...
Tonight..South southwest winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 5 seconds. Inland waters a moderate chop. A chance of showers and a slight chance of Thunderstorms.
Friday..Southwest winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 6 seconds. Inland waters a moderate chop. A chance of showers with a slight chance of Thunderstorms.
Friday night..West winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 6 seconds. Inland waters a light chop.
Saturday..Northwest winds 5 to 10 knots becoming southeast in the afternoon. Seas 2 to 3 feet. Dominant period 7 seconds. Inland waters a light chop.
Saturday night..South southeast winds 5 to 10 knots. Seas 1 to 2 feet. Inland waters smooth.
Sunday..East southeast winds 10 to 15 knots. Seas 2 to 3 feet. Inland waters a light chop.
Sunday night..Southeast winds 10 to 15 knots. Seas 2 to 4 feet. Inland waters a moderate chop.
Monday..South southeast winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Inland waters choppy. Showers likely and a chance of Thunderstorms.
Monday night..South southwest winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Inland waters choppy. Showers likely and a chance of Thunderstorms.
Tuesday..West southwest winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet subsiding to 2 to 3 feet in the afternoon. Inland waters a moderate chop.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 243 Pm Edt Thu Mar 30 2017
Synopsis.. A weak pressure pattern will persist over area waters today as a warm front lifts slowly north of the region. A cold front will move southeast across the region Friday into Friday night. Weak high pressure will then build north then east of the local waters this weekend. A cold front will then cross the region early next week with advisory conditions expected over portions of the local waters.

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


Area Discussion for - Jacksonville, FL
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Fxus62 kjax 301804
afdjax
area forecast discussion
national weather service jacksonville fl
204 pm edt Thu mar 30 2017

Near term/ /through Friday/...

the combination of a nearly stationary frontal boundary just to
the north, surface based instability and sea breeze convergence
will lead to isolated showers and storms. The convection will
mainly be inland.

A cold front will cross the region from the northwest late Friday.

A prefrontal trough is expected to produce convection over the
region ahead of the front for late tonight into Friday afternoon.

Models have been decreasing coverage and intensity of the
convection over the last few runs. While a few strong storms will
still be possible, the convective coverage is expected to be
isolated to scattered. Expect much of the activity to be in the
morning Friday, with skies clearing in the afternoon.

Temperatures will continue above normal this period.

Short term /Friday night through Saturday night/
An upper low is forecast to move eastward across the ohio valley
Friday night, and then into the western atlantic off the coast of
new jersey by Saturday morning. Another trough will push into the
northeastern CONUS Saturday night. Further west, an upper low over
the four corners region will become a positively trough as it
pushes into texas Saturday night. Upper level heights will build
across the region ahead of the trough through the period. At the
surface, two areas of low pressure near/across pennsylvania will
slide east, with the eastern low becoming dominant by Saturday
morning. A weak frontal boundary will move through the region
Friday night, and slightly cooler temperatures are expected in the
mid 50s to lower 60s, warmest towards the coast. Weak surface
high pressure will build over the region on Saturday, and light
winds and very warm conditions will continue. Highs will rise into
the 80s.

Long term /Sunday through Wednesday/
Southern stream shortwave over texas and northern mexico on
Sunday will push east and cut off near the ARKLATEX region Monday
morning. The upper low is then forecast to push eastward across
the southeast, and into northern georgia Monday night. At the
surface, an area of low pressure is forecast to develop across
eastern texas on Sunday, and then move then across the deep south
on Monday. A warm front near the northern part of southeast
georgia Sunday night will lift northward ahead of the low on
Monday. This boundary may produce strong to severe storms Monday
into Monday night as instability and vertical wind shear increase.

40-60% of the top 15 cips analogs is showing is showing at least
1 severe weather report within 110km of a point across our region,
with 30-40% of the top 15 members showing at least 5 severe
weather reports within 110km across northeast florida Monday
evening/night. QPF amounts around 0.5 inches are forecast, with
amounts up to 2 inches possible. Some model differences in timing
still exist with the GFS a little faster than the ecmwf. A weak
frontal boundary is forecast to push into the region on Tuesday
and washout. A broad upper trough is forecast to carve out east of
the intermountain west on Wednesday, and a cold front is forecast
to move into the southeast by Wednesday evening.

Temperatures are forecast to remain above normal through the
period. Highs are forecast to be in the 80s to near 90 each day.

Aviation
A few showers and an isolated storm will be possible this
afternoon and evening. A brief restriction will be possible. A
cold front will cross the region on Friday, with scattered showers
and storms developing ahead of it overnight tonight. A few brief
restrictions will be possible overnight into early afternoon on
Friday.

Marine
A warm front will lift northeast of area waters tonight, as a cold
front approaches from the northwest. This front will cross the
region late Friday into Friday night. Scattered showers and storms
will be expected ahead of this front. High pressure will build
for the weekend. A cold front will cross area waters Monday into
Tuesday bringing the potential for a round of storms. High
pressure will build for Wednesday.

Preliminary point temps/pops
Amg 63 84 55 85 / 30 20 0 0
ssi 66 83 61 78 / 30 30 0 0
jax 63 88 58 85 / 30 30 0 0
sgj 66 87 59 81 / 20 30 0 0
gnv 62 84 55 87 / 20 30 0 0
ocf 62 84 57 86 / 20 30 0 0

Jax watches/warnings/advisories
Fl... None.

Ga... None.

Am... None.

Kennedy/struble/mcginnis


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LTJF1 14 mi40 min 73°F 65°F
MYPF1 - 8720218 - Mayport (Bar Pilots Dock), FL 15 mi40 min SSE 7 G 11 72°F 70°F1011.9 hPa
BLIF1 16 mi40 min SE 11 G 18 76°F 1011.7 hPa62°F
DMSF1 17 mi40 min 72°F
BKBF1 18 mi40 min SE 6 G 8.9 78°F 75°F
JXUF1 18 mi40 min 73°F
NFDF1 20 mi40 min SE 8.9 G 14 78°F 1011.5 hPa
SAUF1 - St. Augustine, FL 24 mi28 min SSE 16 G 17 72°F 70°F1012.7 hPa (-0.5)
RCYF1 29 mi40 min 76°F
FRDF1 - 8720030 - Fernandina Beach, FL 34 mi40 min SE 8 G 13 73°F 74°F1012.1 hPa
41112 - Offshore Fernandina Beach, FL (132) 36 mi58 min 68°F3 ft
GTXF1 - Guana Tolomato Matanzas Reserve, FL 37 mi103 min SSE 8.9 78°F 1013 hPa66°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 mi35 minSSE 1210.00 miFair75°F60°F60%1011.4 hPa
Mayport, Mayport Naval Station, Adm David L. McDonald Field, FL14 mi36 minSSE 1010.00 miMostly Cloudy72°F66°F82%1011.5 hPa
St. Augustine, St. Augustine Airport, FL15 mi30 minSSE 1310.00 miFair74°F63°F69%1012.1 hPa
Jacksonville Naval Air Station, FL17 mi35 minSE 910.00 miMostly Cloudy79°F61°F54%1010.9 hPa

Wind History from CRG (wind in knots)
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Last 24hrE3CalmSW7S5S4CalmCalmSE4SE7SE3SE3CalmS6S7S10SW11S5S9E10SE11SE13SE10
G18
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1 day agoS8S5SW5CalmCalmCalmCalmCalmCalmW3SW3SW3W43N43SE5NE9
G15
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2 days agoSE6SE6S4SE3S3SW4S4CalmCalmCalmCalmCalmSW7SW11W8--W5W7
G14
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Tide / Current Tables for Palm Valley, ICWW, Florida
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Palm Valley
Click for Map
Thu -- 01:00 AM EDT     5.92 feet High Tide
Thu -- 06:49 AM EDT     -0.55 feet Low Tide
Thu -- 07:16 AM EDT     Sunrise
Thu -- 09:16 AM EDT     Moonrise
Thu -- 01:28 PM EDT     5.42 feet High Tide
Thu -- 07:04 PM EDT     -0.61 feet Low Tide
Thu -- 07:43 PM EDT     Sunset
Thu -- 10:42 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.65.95.54.42.71-0.2-0.501.22.53.84.85.35.34.531.3-0-0.6-0.20.92.43.8

Tide / Current Tables for St. Johns River Entrance, Florida Current
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St. Johns River Entrance
Click for Map
Thu -- 12:33 AM EDT     -0.00 knots Slack
Thu -- 03:09 AM EDT     -2.60 knots Max Ebb
Thu -- 07:16 AM EDT     0.00 knots Slack
Thu -- 07:16 AM EDT     Sunrise
Thu -- 09:16 AM EDT     Moonrise
Thu -- 09:51 AM EDT     2.24 knots Max Flood
Thu -- 12:53 PM EDT     -0.01 knots Slack
Thu -- 03:31 PM EDT     -2.46 knots Max Ebb
Thu -- 07:23 PM EDT     0.00 knots Slack
Thu -- 07:43 PM EDT     Sunset
Thu -- 10:15 PM EDT     2.77 knots Max Flood
Thu -- 10:43 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.8-0.7-2-2.6-2.4-1.9-1.3-0.30.91.92.21.81-0.1-1.5-2.4-2.4-2-1.3-0.40.822.72.5

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 (20,4,5,8)
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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.