Friday, August23, 2019 L-36.com


Marine Weather and Tides
Green Cove Springs, FL

Version 3.4
NOTICE
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:57AMSunset 8:01PM Friday August 23, 2019 3:54 PM EDT (19:54 UTC) Moonrise 12:00AMMoonset 1:02PM Illumination 42% 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
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AMZ452 Expires:201908232215;;085196 Fzus52 Kjax 231401 Cwfjax Coastal Waters Forecast For Northeast Florida/southeast Georgia National Weather Service Jacksonville Fl 1001 Am Edt Fri Aug 23 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. Amz450-452-454-232215- 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- 1001 Am Edt Fri Aug 23 2019
Rest of today..Variable winds 10 knots or less this morning becoming east southeast winds 10 to 15 knots by early afternoon. Seas 2 to 3 feet. Dominant period 7 seconds. Inland waters a light chop. A chance of showers and Thunderstorms.
Tonight..Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Dominant period 6 seconds. Inland waters a light chop. A chance of showers and a slight chance of Thunderstorms.
Saturday..East winds 5 to 10 knots. Seas 2 to 3 feet. Dominant period 6 seconds. Inland waters a light chop. A chance of showers and a slight chance of Thunderstorms.
Saturday night..East southeast winds 5 to 10 knots. Seas 2 to 3 feet. Dominant period 6 seconds. Inland waters a light chop. A chance of showers and a slight chance of Thunderstorms.
Sunday..East northeast winds 5 to 10 knots. Seas 2 to 3 feet. Dominant period 7 seconds. Inland waters a light chop. A chance of showers and a slight chance of Thunderstorms.
Sunday night and Monday..East southeast winds 5 to 10 knots. Seas 2 to 3 feet. Showers and a chance of Thunderstorms.
Monday night..South southwest winds 5 to 10 knots. Seas 2 to 3 feet. A chance of showers and Thunderstorms.
Tuesday..South southwest winds 5 to 10 knots. Seas 2 to 3 feet. Showers and a chance of Thunderstorms.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 1001 Am Edt Fri Aug 23 2019
Synopsis.. High pressure over the local waters today will shift farther offshore as low pressure approaches south florida. This low will drift northward this weekend, then track northeast offshore of the southeast atlantic Monday. A weak front will linger over georgia as high pressure builds over south florida Tuesday.
Gulf stream.. The approximate location of the west wall of the gulf stream as of aug 22, 2019 at 1200 utc... 61 nautical miles east southeast of flagler beach. 72 nautical miles east of saint augustine beach. 84 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 Green Cove Springs, FL
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location: 29.99, -81.66     debug


Area Discussion for - Jacksonville, FL
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Fxus62 kjax 231511
afdjax
area forecast discussion
national weather service jacksonville fl
1111 am edt Fri aug 23 2019

Hot and less rainfall potential today...

Update
Persistent mid level ridge axis 1000-700 mb was over SE ga this
morning as invest 98l was approaching the SE fl coast from the
bahamas. Steering flow remained light < 5 kts across SE ga under
the ridge axis, while storm motion will be more ene today across
ne fl but still < 10 kts.

An even drier airmass will dominate the area today with 12z jax
raob pwat down to 1.65 inches, actually below climo. Sounding
profile indicated a deeper depth of mid level dry air, but still
plenty of low level moisture to result in a cumulus field by
early afternoon. Light steering flow will enable both sea breezes
to develop and drift inland, with convective a temp of 90 deg
expected by midday supporting a few spotty sprinkles and light
showers through mid afternoon, but expect updrafts will be
tempered by mid level dry air entrainment. Although drier, mid
levels were more unstable today with steeper lapse rates (most
unstable layer 6.4 c km) and 500 mb temps cooler near -6.2 degc.

Dcape was over 1000 j kg. So, although coverage of showers and
isolated storms will be limited, forcing along boundary mergers
mid afternoon through early evening could produce a few isolated
strong storms capable of stronger wet downbursts, especially
across our southern tier fl zones roughly from trenton to
gainesville to palatka southward toward ocala. Convection will
clear the coast into the mid to late afternoon, but a few rouge
showers will be possible as onshore convergence gradually
increases as the low to our south edges northward.

With drier air, trended a bit warmer with highs today above climo
into the mid 90s inland (parts of SE ga upper 90s) to near 90
along the atlantic coast. Heat index values will near 100-106 deg
f, warmest over SE ga.

Tropics... Increased chances of invest 98l developing into a
tropical cyclone this weekend and into early next week as the
broad system drifts northward near the fl peninsula today through
Sunday. The system is then expected to track NE away from the
local atlantic coast late Sun into mon, posing minimal impacts to
the local area. Although significant tropical impacts are not
expected, we will experience an increase in rip current activity
this weekend and elevated rain chances Sun into mon. As we head
into the peak of hurricane season, please start monitoring
potential storm development via official outlooks and forecast
from the national hurricane center (nhc.Noaa.Gov) and ensure
supply kits are stocked.

Aviation
Potential brief MVFR ceilings late morning through early
afternoon as cumulus field develops inland of sea breezes. Light
offshore land breeze at coastal terminals will transition to east
then southeast along the coast by early afternoon with sea breeze,
speeds 10-12 kts. Drier air will limit convective potential
today, with greatest chance of afternoon shower or tstorm near
gnv, but will monitor radar trends for inclusion of potential
tempo group. Tonight another round of pre-dawn low stratus and
shallow ground fog possible at inland terminals. Based MVFR to ifr
restrictions on persistence at vqq and jax.

Marine
High pressure ridge axis over the waters creating light and
variable winds 10 kts or less this morning. Winds will become
onshore and increase to 10-15 kts from the se. Combined seas 3 ft
or less. Increase in shower and tstorm activity expected over the
waters today into the weekend as broad bands of convection rotate
over the waters on the northern side of the south florida low.

Rip currents: low risk today. Moderate risk Saturday. Elevated rip
current risk expected Sun & mon.

Preliminary point temps pops
Amg 95 73 94 73 20 10 40 40
ssi 89 79 90 77 10 10 20 20
jax 93 74 91 76 20 10 20 20
sgj 90 78 89 75 20 20 30 20
gnv 94 73 92 74 20 10 30 20
ocf 94 73 91 74 30 20 50 20

Jax watches warnings advisories
Fl... None.

Ga... None.

Am... None.

Enyedi peterson


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SAUF1 - St. Augustine, FL 23 mi55 min NNE 9.9 G 11 82°F 83°F1016.7 hPa (-1.5)
JXUF1 25 mi55 min 87°F
DMSF1 28 mi55 min 86°F
NFDF1 28 mi55 min E 8.9 G 11 86°F 1018.3 hPa (-1.4)
BLIF1 29 mi55 min E 9.9 G 13 88°F 1017.6 hPa (-1.4)78°F
LTJF1 29 mi55 min 85°F
41117 31 mi55 min 83°F2 ft
MYPF1 - 8720218 - Mayport (Bar Pilots Dock), FL 31 mi55 min ENE 8.9 G 9.9 83°F 81°F1017 hPa (-1.5)
GTXF1 - Guana Tolomato Matanzas Reserve, FL 32 mi70 min NNE 7 86°F 1018 hPa86°F
FRDF1 - 8720030 - Fernandina Beach, FL 48 mi55 min 94°F 83°F1017 hPa (-1.7)

Wind History for I-295 Bridge, St Johns River, FL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Jacksonville Naval Air Station, FL17 mi2 hrsE 410.00 miMostly Cloudy90°F71°F54%1016.2 hPa
Northeast Florida Regional Airport, FL18 mi2 hrsNNE 1010.00 miPartly Cloudy87°F78°F75%1017.1 hPa
Cecil Airport, FL20 mi65 minVar 410.00 miMostly Cloudy97°F71°F44%1015.9 hPa
Keystone Airpark, FL23 mi80 minVar 310.00 miMostly Cloudy90°F68°F49%1015.9 hPa

Link to 5 minute data for KNIP

Wind History from NIP (wind in knots)
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Last 24hrN14
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E9E11E12E10SE10SE8SE8S3SE6S5S5CalmCalmCalmCalmCalmN4N53N4N3E4NE7
1 day agoE5E8E12E11SE8SE9SE9SE8SE9S7SE8S6S4S3S4CalmNW3CalmCalmNE4SE7S54Calm
2 days agoE4E6E6E7SE7SE5SE9SE7S6S5S5S6CalmCalmW3NW3CalmCalmS44S5CalmCalmE5

Tide / Current Tables for Green Cove Springs, St. Johns River, Florida
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Green Cove Springs
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Fri -- 12:20 AM EDT     Moonrise
Fri -- 02:09 AM EDT     4.35 feet Low Tide
Fri -- 06:58 AM EDT     Sunrise
Fri -- 07:09 AM EDT     4.88 feet High Tide
Fri -- 10:58 AM EDT     Last Quarter
Fri -- 02:01 PM EDT     Moonset
Fri -- 02:19 PM EDT     4.24 feet Low Tide
Fri -- 07:59 PM EDT     Sunset
Fri -- 08:12 PM EDT     4.96 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.44.44.44.44.64.84.94.94.94.84.64.44.34.34.24.34.44.74.94.954.94.84.6

Tide / Current Tables for Black Creek, S.C.L. RR. bridge, Florida
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Black Creek
Click for Map
Fri -- 12:20 AM EDT     Moonrise
Fri -- 02:07 AM EDT     4.95 feet Low Tide
Fri -- 06:20 AM EDT     5.53 feet High Tide
Fri -- 06:58 AM EDT     Sunrise
Fri -- 10:58 AM EDT     Last Quarter
Fri -- 12:33 PM EDT     4.90 feet Low Tide
Fri -- 02:02 PM EDT     Moonset
Fri -- 07:01 PM EDT     5.65 feet High Tide
Fri -- 08:00 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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55555.25.45.55.55.45.35.154.94.94.955.15.45.65.75.65.55.45.2

Weather Map and Satellite Images
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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 (15,3,4,5)
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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.