Wednesday, December13, 2017 L-36.com


Marine Weather and Tides
Gainesville, 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 7:14AMSunset 5:33PM Wednesday December 13, 2017 5:46 AM EST (10:46 UTC) Moonrise 3:01AMMoonset 2:50PM Illumination 25% Phase: Waning Crescent; Moon at 25 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
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- 258 Am Est Wed Dec 13 2017
.small craft should exercise caution...
Today..Northwest winds 15 to 20 knots becoming west 5 to 10 knots in the afternoon. Seas 3 to 5 feet with occasional seas up to 6 feet subsiding to 2 to 3 feet in the afternoon. Dominant period 7 seconds. Inland waters a light chop.
Tonight..West southwest winds 15 to 20 knots. Seas 2 to 3 feet. Dominant period 3 seconds. Inland waters a moderate chop.
Thursday..Southwest winds 10 to 15 knots. Seas 2 to 3 feet. Dominant period 3 seconds. Inland waters a light chop.
Thursday night..West southwest winds 5 to 10 knots. Seas 1 to 2 feet. Dominant period 9 seconds becoming 4 seconds after midnight. Inland waters a light chop.
Friday..West southwest winds 10 to 15 knots. Seas 1 to 2 feet. Inland waters a light chop. A chance of showers.
Friday night..Northwest winds 15 to 20 knots. Seas 2 to 3 feet. Inland waters a moderate chop.
Saturday..North northeast winds 5 to 10 knots. Seas 2 to 3 feet. Inland waters a light chop.
Saturday night..East winds 5 to 10 knots. Seas 1 to 2 feet. Inland waters a light chop.
Sunday..South southeast winds 5 to 10 knots. Seas 1 to 2 feet. Inland waters a light chop. A chance of showers.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 258 Am Est Wed Dec 13 2017
Synopsis.. Winds and seas will begin to decrease today as high pressure builds over the gulf coast region. Winds will may increase to near small craft advisory conditions this evening as a coastal trough develops. A ridge will build toward south florida through Thursday as yet another cold front approaches from the northwest. The next front will cross the waters late Friday.

7 Day Forecast for Marine Location Near Gainesville, FL
   Hourly   EDIT   Help
location: 29.71, -82.3     debug


Area Discussion for - Jacksonville, FL
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus62 kjax 130917
afdjax
area forecast discussion
national weather service jacksonville fl
417 am est Wed dec 13 2017

Near term through tonight
Temperatures were in the upper 30s to mid 40s early this morning,
with west northwesterly winds of 5-10 mph. Temps will continue to
fall into the middle 30s across the interior before daybreak,
with wind chills in the mid upper 20s. High pressure over the
panhandle of florida early this morning will move south during the
day. Light southwesterly winds will prevail. Despite full
sunshine, temps will be on the cool side with below normal max
temps areawide, with highs in the low to mid 50s across southeast
georgia, and the mid to upper 50s to near 60 across northeast
florida.

Tonight: center of surface high pressure will reside over north
florida with the region on the northern periphery. Light west
winds at the surface of 3 to 7 knots will be decoupled from the
925mb winds which will be 40 to 45 knots SE ga and 25 to 40 knots
fl zones. There will be enough mixing and moisture increase from
the gulf to keep temperatures in the upper 30s to mid 40s to the
coast. Low stratus may move in from the gulf overnight across the
suwannee valley.

Short term Thursday through Friday night
The subtropical branch of the jet stream will be in place over our
region, with troughing digging southeastward from the plains
states. Meanwhile, weak surface ridging centered over southeast
florida early on Thursday, which will create a light west-
southwest wind regime in the low levels. We cannot rule out a few
sprinkles falling from the mid and high altitude cloud deck over
marion county on Thursday afternoon and evening, but measurable
rainfall will likely be isolated in nature. Temperatures will
rebound to near mid-december climo, with highs generally in the
mid to upper 60s, except near 70 in north central florida.

The approaching progressive trough aloft will drive a cold front
into the southeastern u.S. On Thursday night. Deepening west-
southwesterly flow and some isentropic lift well ahead of the
front may drive a few light showers onshore from the gulf of
mexico into western marion county on Thursday night. Mid and high
altitude cloud cover associated with the subtropical jet will
increase from south to north overnight, with lows falling into the
lower 40s near the altamaha, ranging to the low mid 50s for
coastal northeast and north central florida.

Deep southwesterly flow will persist on Friday area-wide, with
modest amounts of moisture pooling along a slow moving cold front
that will slowly slide southeastward through our region during the
afternoon hours. Isolated to widely scattered light showers will
be possible throughout the day, mainly for locations south of
waycross. Abundant cloud cover and cool air advection during the
afternoon hours will keep highs in the low to mid 60s for
southeast georgia, while highs climb to the upper 60s and lower
70s for locations in northeast and north central florida that will
be ahead of the cold front through the early afternoon.

The cold front will move southward into the florida peninsula and
will dissolve on Friday night. The subtropical branch of the jet
stream will remain in place over our area, keeping a mid-level
cloud deck in place through at least the evening hours per model
soundings, with clearing skies expected over much of southeast
georgia expected after midnight. Our local pressure gradient will
temporarily tighten overnight as cool surface ridging builds into
the southeastern u.S., with northwesterly winds of 5-10 mph
expected inland and 10-15 mph in coastal locations overnight. Lows
will fall to about 5 degrees below climo, with upper 30s expected
inland and around 40 at the coast. Lows will generally fall to
40-45 for inland northeast florida, ranging to the mid upper 40s
for north central and coastal northeast florida.

Long term Saturday through Wednesday
Cool surface ridging over the southeastern states early on
Saturday will progress northeastward towards the carolina coast by
Saturday evening. Meanwhile, a cutoff upper low over baja
california on Saturday will get picked up by the subtropical
branch of the jet stream and will accelerate into deep south texas
by Saturday night, resulting in cyclogenesis over the western
gulf of mexico. Cool northerly flow will advect a drier air mass
into northeast and north central florida early on Saturday, with
only patches of high cirrus expected over our region through
Saturday night. Low level flow will quickly veer to northeasterly
by Saturday afternoon, but our local pressure gradient should
remain relatively loose through Saturday night. Highs on Saturday
will remain about 5 degrees below climo, with upper 50s to around
60 expected for locations along and north of interstate 10,
ranging to the mid 60s in north central florida. Lows Saturday
night will fall to the low to mid 40s inland, with light onshore
winds keeping coastal lows in the upper 40s to lower 50s.

Southwesterly flow aloft will deepen over our region on Sunday as
shortwave troughing accelerates from the ARKLATEX region early in
the day to the tennessee and then ohio valley by Sunday evening.

Deep-layered moisture will advect northeastward from the gulf of
mexico into our area during the afternoon hours, and some weak
isentropic lift will develop scattered mainly light showers during
the afternoon hours for most of our region. Highs will rebound to
above climo, ranging from the upper 60s in southeast georgia to
the low mid 70s in north central florida.

Deep southwesterly flow will prevail over our area early next
week downstream of another trough aloft that will be digging
southeastward from the plains states. Shortwave energy embedded
within this moisture-laden weather pattern will produce periods of
scattered showers from Sunday night through Tuesday, with
temperatures and humidity levels remaining well above late
december climo. Lows on Sunday night and Monday night will
generally fall into the 50s, except around 60 at the coast. Highs
on Monday will generally climb to 70-75, except the upper 70s in
north central florida. Highs on Tuesday will cool by a few degrees
ahead of an approaching cold front. A few showers may linger
along the cold front that should push through northeast and north
central florida on Tuesday evening, with a slightly cooler and
drier air mass moving into the southeastern u.S. During the
midweek time frame behind the front. Highs on Wednesday will
generally reach the mid to upper 60s, with inland lows falling
back into the 40s.

Aviation
Vfr conditions expected through the period with light west to
northwest winds and clear sunny skies. Low stratus may move from
the gulf towards kgnv after the end of the TAF period.

Marine
Small craft advisory conditions will end this morning as high
pressure builds into the region. Winds will back to the southwest
and increase to scec levels, possibly SCA levels, for a brief
period tonight into Thursday as a coastal trough develops. Another
round of SCA conditions expected on Friday Friday night as
offshore winds increase behind another cold front.

Rip currents: low risk through Thursday.

Fire weather
A cool and dry air mass will settle over our region today, with
long durations of critically low relative humidity values this
afternoon across inland portions of southeast georgia.

Northwesterly surface and transport winds will become westerly by
early afternoon, with diminishing speeds resulting in low daytime
dispersion values across much of the suwannee valley and portions
of north central florida.

Preliminary point temps pops
Amg 54 39 64 42 0 0 0 0
ssi 54 46 64 49 0 0 0 10
jax 59 41 68 49 0 0 0 10
sgj 59 43 68 54 0 0 10 10
gnv 58 40 70 51 0 10 10 10
ocf 59 41 70 52 0 10 20 10

Jax watches warnings advisories
Fl... None.

Ga... None.

Am... Small craft advisory until 9 am est 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.

Kennedy nelson


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
RCYF1 40 mi47 min 58°F
CDRF1 - Cedar Key, FL 55 mi47 min NNW 7 G 11 49°F 1018.4 hPa (+0.4)33°F
SAUF1 - St. Augustine, FL 56 mi47 min NW 7 G 11 46°F 60°F1016.9 hPa (+0.7)
GTXF1 - Guana Tolomato Matanzas Reserve, FL 57 mi62 min SW 1 40°F 1018 hPa36°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
Gainesville, Gainesville Regional Airport, FL3 mi54 minWNW 510.00 miFair38°F33°F83%1018.2 hPa
Keystone Airpark, FL16 mi72 minN 010.00 miFair37°F33°F87%1016.9 hPa

Wind History from GNV (wind in knots)
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
Last 24hrCalmCalmCalmSW4SW8W15
G20
W16
G27
W19
G29
W22
G30
W21
G29
W18
G23
W12NW8NW6NW5W6NW8W5NW5W5W5W5W5NW5
1 day agoCalmNW4CalmNW5NW6NW53W8
G19
W6SW8W9W5SW3SW6SW4CalmCalmCalmCalmCalmCalmCalmCalmCalm
2 days agoNW4NW4NW4N63CalmNW75N7W6W4W5SW3CalmW3W5W5W4CalmNW5NW3NW4NW4NW4

Tide / Current Tables for Buffalo Bluff, St. Johns River, Florida
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Buffalo Bluff
Click for Map
Wed -- 02:58 AM EST     Moonrise
Wed -- 06:41 AM EST     0.19 feet Low Tide
Wed -- 07:13 AM EST     Sunrise
Wed -- 12:20 PM EST     1.39 feet High Tide
Wed -- 02:47 PM EST     Moonset
Wed -- 05:29 PM EST     Sunset
Wed -- 07:06 PM EST     0.20 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.31.10.90.60.50.40.20.20.40.81.11.21.41.31.10.80.60.40.30.20.30.711.2

Tide / Current Tables for Palatka, St. Johns River, Florida
   EDIT      (on/off)   Help   One Week of Data
Palatka
Click for Map
Wed -- 02:58 AM EST     Moonrise
Wed -- 05:52 AM EST     0.20 feet Low Tide
Wed -- 07:12 AM EST     Sunrise
Wed -- 11:41 AM EST     1.65 feet High Tide
Wed -- 02:47 PM EST     Moonset
Wed -- 05:28 PM EST     Sunset
Wed -- 06:19 PM EST     0.22 feet Low Tide
Wed -- 11:55 PM EST     1.58 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.51.20.90.60.50.30.20.40.81.11.41.61.61.51.10.80.60.40.20.30.611.31.5

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 (5,6,7,8)
      (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.