Monday, December11, 2017 L-36.com


Marine Weather and Tides
Jacksonville, 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 7:12AMSunset 5:28PM Monday December 11, 2017 5:47 PM EST (22:47 UTC) Moonrise 1:08AMMoonset 1:39PM Illumination 40% Phase: Third Quarter Moon; Moon at 23 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
    EDIT      (on/off)   Help
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- 223 Pm Est Mon Dec 11 2017
.small craft advisory in effect from 11 pm est this evening through Wednesday morning...
Tonight..West southwest winds 10 to 15 knots increasing to 20 knots after midnight. Seas 2 to 4 feet. Dominant period 8 seconds. Inland waters a moderate chop.
Tuesday..West winds 20 to 25 knots shifting northwest trailing frontal passage. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 4 seconds. Inland waters choppy.
Tuesday night..Northwest winds 20 to 25 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 4 seconds. Inland waters choppy.
Wednesday..West northwest winds 15 to 20 knots. Seas 2 to 4 feet. Dominant period 5 seconds. Inland waters a moderate chop.
Wednesday night..West winds 10 to 15 knots. Seas 2 to 3 feet. Inland waters a moderate chop.
Thursday..Southwest winds 10 to 15 knots. Seas 1 to 2 feet. Inland waters a moderate chop.
Thursday night..Southwest winds 10 to 15 knots. Seas 2 to 3 feet. Inland waters a moderate chop. A chance of showers.
Friday..West southwest winds 15 to 20 knots. Seas 2 to 3 feet building to 3 to 5 feet with occasional seas up to 6 feet in the afternoon. Inland waters choppy. A chance of showers.
Friday night..Northwest winds 15 to 20 knots. Seas 2 to 4 feet. Inland waters choppy. A chance of showers.
Saturday..North northwest winds 10 to 15 knots. Seas 2 to 3 feet. Inland waters a light chop.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 223 Pm Est Mon Dec 11 2017
Synopsis.. A dry cold front will approach from the northwest tonight and cross the waters Tuesday with advisory conditions expected tonight through Wednesday morning. Winds and seas will begin to decrease late Wednesday as high pressure builds over the gulf coast region. This ridge will build toward south florida through Thursday as yet another cold front approaches from the northwest. This next front will cross the waters late Friday.

7 Day Forecast for Marine Location Near Jacksonville, FL
   Hourly   EDIT   Help
location: 30.28, -81.7     debug


Area Discussion for - Jacksonville, FL
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus62 kjax 111905
afdjax
area forecast discussion
national weather service jacksonville fl
205 pm est Mon dec 11 2017

Brief rebound in temperatures tonight & Tuesday...

Near term Surface high pressure across the gulf of mexico was edging
farther south as an approaching cold front was diving southeast toward
the mid ms river valley. Sunny skies prevailed across the forecast
area this afternoon under wnw winds 5-10 mph which will progressively
back wsw into this evening as the ridge shifts farther south and
the trough approaches. High temperatures will top out near 60
degrees.

A warmer night tonight by about 5-10 deg across the forecast area
due to warmer SW flow off of the gulf ahead of the approaching
cold front. The coolest spot across the area is expected to be the
suwannee river valley where lighter winds and mostly clear skies
are expected... And advertised patchy frost and shallow ground fog
there tonight as temperatures fall into the upper 30s to near 40.

Farther south toward gainesville and ocala, expect some passing
low cumulus clouds after midnight through Tue morning ahead of
the front which will keep min temperatures tonight more mild in
the lower 40s, and elevated winds across inland SE ga will keep
min temps more mild with lows in the low 40s tonight also. Toward
the st. Johns river basin and atlantic coast mins tonight will
fall into the mid to upper 40s.

Tuesday the dry cold front (meaning no rainfall expected) will
press southeast across SE ga in the morning then across NE fl
through the afternoon. The biggest weather impact from this
approaching front will be windy conditions developing by mid-
morning. Wsw winds will increase to near 15 mph by midday across
much of the forecast area with gusts of 25-30 mph due to a strong
pressure gradient with the passing cold front. Given the timing of
the frontal passage in the morning across SE ga, daytime highs
will only range near 60 once again, while parts of NE fl from
roughly st augustine toward ocala will near 70 degrees ahead of
the cold front. A few passing low and high clouds will bring
mostly sunny to partly cloudy skies across parts of NE fl while
prevailing mostly sunny skies are expected over SE ga. Cold and
dry air advection will ensure trailing the surface cold front from
nw to SE through the day.

Short term Tuesday night through Thursday...

an upper level short wave trough will remain entrenched along the
eastern CONUS with a series of impulses dropping southward and a
few clipper systems moving across the great lakes and new england
through the period. The primary impacts this far south will be a
series of dry cold frontal passages which will really be
noticeable due to the increasing winds and cold air advection in
their wake. An inland freeze is expected again Tuesday night, with
wind chills in the 20s. After this a series of quick systems can
be expected with slight moderation of the temperatures and
humidity ahead of them and cooling drying behind them.

Long term Thursday night through Monday...

continued reinforcing of the upper trough will occur on Thursday
night and Friday but this one will drop far enough south to pick
up some gulf moisture for our next shot of precipitation. This
front will sweep across the are on Friday with a developing
northeaster off CAPE cod. Over the weekend surface high pressure
will move directly over the area with some moderation in the
temperatures. By Monday the high will pull offshore with another
reinforcing shortwave digging south and a frontal system racing
across the area during the day.

Aviation
PrevailingVFR through 06z tonight. There is a low probability of
shallow MVFR mist at gnv after 08z tonight. A dry cold front will
approach from the NW late tonight into early Tue with increasing
winds. Included wind shear for only ssi early Tue morning around
11z due to approach of a 950 mb (about 2 kft agl) jet of 35-40
kts.VFR conditions expected Tue after 13z under windy westerly
winds with gusts 20-30 kts as front shifts southward across the
forecast area through the day.

Marine
Westerly winds near 10 kts prevailed over the waters this
afternoon with combined seas 3 ft or less. Winds will increase
through this evening as they back more wsw ahead of approaching
dry cold front that will cross the waters NW to SE through Tuesday
afternoon. Winds will increase to advisory levels tonight for all
legs and raised an advisory with the potential for a few
infrequent gale force gusts over the outer waters through late tue
afternoon. Offshore NW flow will remain elevated at SCA levels tue
night, then winds and seas will begin to subside to exercise
caution levels through Wed as the pressure gradient relaxes as
high pressure builds over the gulf coast region. This ridge will
build sse through Thu in advance of yet another cold front
expected to cross the waters late Fri or Sat with a low chance of
rainfall with the potential for marginal advisory conditions over
the outer waters.

Rip currents: low risk today. Moderate risk highlighted for
Tuesday.

Fire weather
High daytime dispersions Tuesday with dry cold front pressing
across the area. Rainfall not expected. Freeze and frost likely
again Tuesday night and potentially Wednesday night inland.

Preliminary point temps pops
Amg 40 59 30 51 0 0 0 0
ssi 48 63 36 52 0 0 0 0
jax 43 66 34 54 0 0 0 0
sgj 46 69 36 55 0 0 0 0
gnv 41 68 32 55 0 0 0 0
ocf 40 70 34 57 0 0 0 0

Jax watches warnings advisories
Fl... None.

Ga... None.

Am... Small craft advisory from 11 pm this evening to 2 pm est
Wednesday 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 from 11 pm this evening to 7 am est
Wednesday 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.

Enyedi sandrik mcginnis


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
JXUF1 7 mi48 min 61°F
DMSF1 11 mi48 min 61°F
BLIF1 12 mi48 min SW 8 G 9.9 60°F 1021.2 hPa (-1.2)37°F
LTJF1 15 mi48 min 60°F 35°F
MYPF1 - 8720218 - Mayport (Bar Pilots Dock), FL 17 mi48 min WSW 8.9 G 9.9 60°F 62°F1020.4 hPa (-1.1)
FRDF1 - 8720030 - Fernandina Beach, FL 30 mi48 min WSW 2.9 G 6 59°F 59°F1020.7 hPa (-1.0)
RCYF1 34 mi48 min 62°F
SAUF1 - St. Augustine, FL 37 mi48 min SW 5.1 G 6 59°F 62°F1021.1 hPa (-1.0)
41112 - Offshore Fernandina Beach, FL (132) 37 mi48 min 60°F1 ft
41117 38 mi56 min 65°F2 ft
GTXF1 - Guana Tolomato Matanzas Reserve, FL 50 mi63 min SW 1.9 60°F 1023 hPa32°F

Wind History for I-295 Bridge, St Johns River, FL
(wind in knots)    EDIT      (on/off)   Help
Last
24hr
1 day
ago
2 days
ago

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Jacksonville Naval Air Station, FL3 mi55 minWSW 1010.00 miA Few Clouds62°F30°F31%1020.1 hPa
Jacksonville Craig Municipal Airport, FL10 mi55 minSW 710.00 miFair61°F30°F32%1020.2 hPa
Cecil Airport, FL10 mi58 minVar 410.00 miFair59°F35°F42%1020.7 hPa
Jacksonville International Airport, FL15 mi52 minWSW 710.00 miA Few Clouds60°F34°F38%1020.1 hPa
Mayport Naval Station - Adm David L. McDonald Field, FL17 mi56 minSW 810.00 miA Few Clouds59°F34°F39%1020 hPa

Wind History from NIP (wind in knots)
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
Last 24hrNW4SW3W3W5W6W5W6W8W6W6W6W7W6W5CalmW4NW7NW7NW6SW4SE8W5SW9SW10
1 day agoNW8W5W6W6W7W7W6W7W10W6W9W10NW9NW7NW9NW9N10N7NW8NW7W9W5W4W4
2 days agoN12N10NW9NW11N16N12N8N8N6N4NW11NW13
G20
NW10
G20
NW8NW11--W7W10
G17
W11W11W12
G20
W12
G23
W10
G18
W9
G19

Tide / Current Tables for Ortega River entrance, Florida
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Ortega River Entrance
Click for Map
Mon -- 01:07 AM EST     Moonrise
Mon -- 05:09 AM EST     6.92 feet High Tide
Mon -- 07:13 AM EST     Sunrise
Mon -- 11:37 AM EST     5.86 feet Low Tide
Mon -- 01:38 PM EST     Moonset
Mon -- 05:27 PM EST     Sunset
Mon -- 05:28 PM EST     6.94 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.86.16.46.76.86.96.86.66.36.165.95.966.36.66.86.96.96.76.46.265.8

Tide / Current Tables for St. Johns River Entrance, Florida Current
   EDIT      (on/off)   Help   One Week of Data
St. Johns River Entrance
Click for Map
Mon -- 01:06 AM EST     Moonrise
Mon -- 01:29 AM EST     1.99 knots Max Flood
Mon -- 04:46 AM EST     -0.00 knots Slack
Mon -- 07:12 AM EST     Sunrise
Mon -- 08:38 AM EST     -1.96 knots Max Ebb
Mon -- 11:21 AM EST     0.00 knots Slack
Mon -- 01:37 PM EST     Moonset
Mon -- 01:53 PM EST     1.87 knots Max Flood
Mon -- 05:01 PM EST     -0.00 knots Slack
Mon -- 05:25 PM EST     Sunset
Mon -- 08:46 PM EST     -2.10 knots Max Ebb
Mon -- 11:42 PM EST     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.31.91.91.70.9-0.3-1.2-1.6-1.9-1.9-1.5-0.50.81.71.91.71.10-1.1-1.8-2-2.1-1.8-0.9

Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Southeast    EDIT
Geos

Wind Forecast for Jacksonville, FL (17,4,5,8)
      (on/off)   Help

Ground Weather Radar Station Jacksonville, FL
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.