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Marine Weather and Tides
Version 3.4 |
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 6:25AM | Sunset 8:19PM | Friday May 24, 2019 5:07 AM EDT (09:07 UTC) | Moonrise 12:00AM | Moonset 10:24AM | Illumination 72% |  |
AMZ452 Expires:201905241515;;369263 Fzus52 Kjax 240713 Cwfjax Coastal Waters Forecast For Northeast Florida/southeast Georgia National Weather Service Jacksonville Fl 313 Am Edt Fri May 24 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. Amz450-452-454-241515- 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- 313 Am Edt Fri May 24 2019
Today..East southeast winds 10 to 15 knots. Seas 2 to 3 feet. Dominant period 7 seconds. Inland waters a light chop.
Tonight..Southwest winds 10 to 15 knots. Seas 2 to 3 feet. Dominant period 7 seconds. Inland waters a light chop.
Saturday..West northwest winds 5 to 10 knots, becoming east southeast 10 to 15 knots in the afternoon. Seas 2 to 3 feet. Dominant period 6 seconds. Inland waters a light chop.
Saturday night..South southwest winds 10 to 15 knots. Seas 2 to 3 feet. Dominant period 6 seconds. Inland waters a light chop.
Sunday..South southwest winds 5 to 10 knots, becoming southeast 10 to 15 knots in the afternoon. Seas 2 to 3 feet. Inland waters a light chop.
Sunday night..South southwest winds 15 knots. Seas 2 to 3 feet. Inland waters a moderate chop.
Monday..Southeast winds 10 to 15 knots. Seas 2 to 4 feet. Inland waters a light chop.
Monday night..South southwest winds 10 to 15 knots. Seas 2 to 4 feet. Inland waters a light chop.
Tuesday..Southeast winds 10 to 15 knots. Seas 2 to 4 feet. Inland waters a light chop.
Today..East southeast winds 10 to 15 knots. Seas 2 to 3 feet. Dominant period 7 seconds. Inland waters a light chop.
Tonight..Southwest winds 10 to 15 knots. Seas 2 to 3 feet. Dominant period 7 seconds. Inland waters a light chop.
Saturday..West northwest winds 5 to 10 knots, becoming east southeast 10 to 15 knots in the afternoon. Seas 2 to 3 feet. Dominant period 6 seconds. Inland waters a light chop.
Saturday night..South southwest winds 10 to 15 knots. Seas 2 to 3 feet. Dominant period 6 seconds. Inland waters a light chop.
Sunday..South southwest winds 5 to 10 knots, becoming southeast 10 to 15 knots in the afternoon. Seas 2 to 3 feet. Inland waters a light chop.
Sunday night..South southwest winds 15 knots. Seas 2 to 3 feet. Inland waters a moderate chop.
Monday..Southeast winds 10 to 15 knots. Seas 2 to 4 feet. Inland waters a light chop.
Monday night..South southwest winds 10 to 15 knots. Seas 2 to 4 feet. Inland waters a light chop.
Tuesday..Southeast winds 10 to 15 knots. Seas 2 to 4 feet. Inland waters a light chop.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 313 Am Edt Fri May 24 2019
Synopsis.. High pressure off the carolina coast will sink southward while gradually weakening today and will then become centered directly over our waters tonight and Saturday. High pressure will then sink southward over the florida peninsula late this weekend and next week, with light offshore winds each morning shifting to onshore in the near shore waters with the sea breeze development each afternoon, followed by evening southerly wind surges this weekend through early next week.
Gulf stream.. The approximate location of the west wall of the gulf stream as of may 23, 2019 at 1200 utc... 62 nautical miles east of flagler beach. 75 nautical miles east of saint augustine beach. 78 nautical miles east of jacksonville beach. 90 nautical miles east southeast of st simons island. This data courtesy of the naval oceanographic office.
Synopsis.. High pressure off the carolina coast will sink southward while gradually weakening today and will then become centered directly over our waters tonight and Saturday. High pressure will then sink southward over the florida peninsula late this weekend and next week, with light offshore winds each morning shifting to onshore in the near shore waters with the sea breeze development each afternoon, followed by evening southerly wind surges this weekend through early next week.
Gulf stream.. The approximate location of the west wall of the gulf stream as of may 23, 2019 at 1200 utc... 62 nautical miles east of flagler beach. 75 nautical miles east of saint augustine beach. 78 nautical miles east of jacksonville beach. 90 nautical miles east southeast of st simons island. This data courtesy of the naval oceanographic office.
7 Day Forecast for Marine Location Near Atlantic Beach, FL
Hourly EDIT Helplocation: 30.39, -81.4 debug
Area Discussion for - Jacksonville, FL
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus62 kjax 240814 afdjax area forecast discussion national weather service jacksonville fl 414 am edt Fri may 24 2019 Heat wave builds at inland locations today... Near record heat and increasing wildfire danger this weekend and next week... Currently Overnight surface analysis depicts weakening high pressure (1023 millibars) centered off the carolina coast. Aloft... Stout ridging continues to build directly over our region downstream of deep troughing that prevails over the rockies. The evening soundings at jacksonville and tallahassee both measured 500 millibar (around 20,000 feet) heights around 592 decameters, which are near record levels for late may. Goes-east total precipitable water (pwat) imagery indicates that a dry air mass has overspread our region, with pwat values of 1 inch or less detected area- wide. Nighttime infrared satellite imagery shows a few patches of cumulus moving onshore from the atlantic over flagler county and moving into southern portions of the st. Johns river basin. Otherwise, fair skies prevail, and radiational cooling is occurring inland as winds have decoupled. Temperatures as of 08z have fallen into the mid 60s inland, while a light onshore breeze is keeping coastal temperatures in the low and mid 70s. Dewpoints were mostly in the 60-65 degree range. Near term (today and tonight) Deep-layered ridging will continue to dominate our weather pattern, with near record 500 millibar heights expected to continue over our region through the holiday weekend. Weakening surface ridging centered over the atlantic waters will sink southward and extend its axis near the fl ga border by this evening. Our local pressure gradient will continue to loosen, and a very subsident and dry air mass will only allow for some flat cumulus clouds to develop along the inland moving sea breezes this afternoon, while some periods of thin cirrus spill southward into our region on the eastern periphery of the ridge. 850 millibar (around 5000 feet) temperatures will increase to near 19 degrees celsius today, which will likely support highs reaching the mid to upper 90s at most inland locations west of u.S. Highway 301. The atlantic sea breeze will develop early this afternoon and will push across the interstate 95 corridor by the mid-afternoon, with breezy east-southeasterly winds developing at the coast, keeping highs in the upper 80s to around 90 for locations east of i-95. The very strong subsident and turbulent mixing from intense insolation and heating will result in dewpoints crashing to the mid and upper 50s well inland this afternoon, while dewpoints fall to the mid 60s at the coast before the sea breeze pushes through. Heat index values will thus resemble the actual air temperature today due to these low humidity values. Surface ridging will then sink southward over north central florida later tonight. Fair skies will prevail, and surface winds will again decouple towards midnight. A light southwesterly breeze will prevail at coastal locations as the ridge axis sinks southward. Radiational cooling should result in lows falling to the mid 60s inland, while coastal lows fall to around 70. Short term (Saturday through Monday night) Synopsis... Dangerously hot weather this period and continued dry. Hotter and continued dry as deep layer ridge strengthens and lingers over the local area. Surface high pressure will meander over north-central florida this period with a weak surface trough axis becoming diffuse over southern ga. Aloft, an unseasonably strong 500 mb ridge center (593-595 dam) will dominate. Other than some diurnally driven cumulus clouds, strong subsidence will suppress convective growth. The main weather story this period will be near record heat, as high temperatures warm into the upper 90s to lower 100s, with a warming trend by a couple degrees each day. The dominant east coast sea breeze will bring some relief to the coast where highs will still warm into the upper 80s to low 90s. Despite the record breaking high temperatures, heat index values this period will range between 100-107 deg inland, just shy of heat advisory criteria (heat advisory issued when heat index is 108-112 deg f). Low temperatures will range generally from the upper 60s to low mid 70s. Long term (Tuesday through Friday) Synopsis... Hot and dry conditions continue, with just a tease of rainfall potential late in the week. Slight pattern shift begins late Tue as the surface ridge axis slides southward across the southern tier of the fl peninsula, with both sea breezes developing and pressing inland and focus the hottest temperatures across the interior between the st. Johns river basin and i-75 corridor. Strong mid level ridge will continue to dominate across the eastern gomex, but with gradual de-amplification through the end of the week as a long wave trough |
edges southward across the lower ms river valley. A slight up-tick in rain chances late Thu and again Fri as pwat increases to 1.5" along the stalling surface front across SE ga and very weak, sheared PVA drifts over the area aloft. Temperatures will continue to warm to near record values each afternoon, from the upper 90s to mid 100s with lows in the low mid 70s to upper 60s in normally cooler locales. Aviation Periods of MVFR visibilities will be possible at vqq through sunrise. The smoke plume from the yellow bluff wildfire, located about 5 miles north of jax, may produce periods of MVFR conditions at jax after 15z, but confidence remains too low to include in the overnight tafs. Light offshore surface winds will develop at ssi after sunrise, with light northeasterly winds expected elsewhere. Surface winds will then shift to east southeasterly at the coastal terminals by 16z, with sustained speeds increasing to near 10 knots. Marine Weakening high pressure that is centered off the carolina coast will sink southward, becoming centered directly over our waters tonight and Saturday. A loosening local pressure gradient will allow the atlantic sea breeze to develop over the near shore waters by early afternoon, with speeds increasing to 10-15 knots over the near shore waters. Seas of 2-3 feet near shore and 3-4 feet offshore today will decrease slowly tonight and Saturday. An evening south-southwesterly wind surge is expected, but speeds should remain below caution levels. Weakening high pressure will then settle over the florida peninsula this weekend, keeping a loose pressure pattern in place locally through much of the next week. Light offshore winds are expected each morning, shifting to southeasterly over the near shore waters as the sea breeze moves inland each afternoon, and then southerly wind surges prevailing each evening over all waters through most of next week. A long period northeasterly ocean swell is expected to enter our waters on Monday, which may bring combined seas back up to 3-4 feet near shore and 4-5 feet offshore through Tuesday. Rip currents: breezy onshore winds in the wake of the inland- moving atlantic sea breeze boundary this afternoon will combine with the outgoing tide this afternoon to create a moderate risk at the northeast florida beaches today. A low risk appears likely for Saturday as wave heights continue to decrease. An increasing risk is then expected by memorial day and Tuesday as a long period northeasterly swell arrives. Fire weather Elevated concern for wildfire outbreaks this holiday weekend due to increased outdoor activity including fireworks, camp fires, cigarettes and cookouts. An extended period of hot and dry weather through early june will continue elevated fire danger, despite not meeting locally defined "red flag" criteria. Temperatures will warm into the upper 90s to mid 100s inland each day with afternoon humidity ranging between 25-35%. Winds will be mainly local terrain influenced, with daily sea breezes, river breezes and lake breezes. Gusts 14-18 mph will be possible as the east coast sea breezes develops and presses inland each afternoon. Dense smoke advisories will likely continue through the weekend associated with the yellow bluff wildfire in north-central duval south-central nassau counties. Climate Record highs at climate sites for memorial day weekend: fri 5 24 Sat 5 25 Sun 5 26 Mon 5 27 --------------------------------------- jacksonville 98(1953) 99(1953) 99(1953) 98(1989) gainesville 98(1893) 98(2011) 100(1953) 100(1953) alma, ga 99(1960) 99(1962) 99(1962) 99(1967) st. Simons island 96(1953) 96(1953) 100(1953) 96(2006) all-time record MAX temps for the month of may... jax 100 05-13-1967 gnv 101 05-31-1945 amg 100 05-28-1967 ssi 100 05-26-1953 Preliminary point temps pops Amg 96 66 100 73 0 0 10 0 ssi 89 72 92 75 0 0 0 0 jax 91 65 97 71 0 0 0 0 sgj 87 69 89 70 0 0 0 0 gnv 95 64 98 69 0 0 0 0 ocf 94 66 97 68 0 0 0 0 Jax watches warnings advisories Fl... Dense smoke advisory until 11 am edt this morning for inland duval-inland nassau. Ga... None. Am... None. Nelson enyedi |
Weather Reporting Stations
EDIT (on/off) Help NOTE: Click on distance to see the station location on a map| Stations | Dist | Age | Wind | Air Temp | Water Temp | Waves | Pressure | DewPt |
| MYPF1 - 8720218 - Mayport (Bar Pilots Dock), FL | 2 mi | 38 min | SSE 1.9 G 4.1 | 74°F | 80°F | 1020.7 hPa | ||
| LTJF1 | 3 mi | 38 min | 74°F | 68°F | ||||
| BLIF1 | 7 mi | 38 min | S 1 G 1.9 | 75°F | 1021.6 hPa | 73°F | ||
| DMSF1 | 8 mi | 38 min | 83°F | |||||
| FRDF1 - 8720030 - Fernandina Beach, FL | 20 mi | 38 min | SE 1.9 G 2.9 | 76°F | 82°F | 1020.9 hPa | ||
| 41112 - Offshore Fernandina Beach, FL (132) | 23 mi | 38 min | 80°F | 3 ft | ||||
| 41117 | 32 mi | 38 min | 79°F | 3 ft | ||||
| SAUF1 - St. Augustine, FL | 38 mi | 68 min | ESE 9.9 G 11 | 76°F | 80°F | 1020.4 hPa (-1.6) | 65°F | |
| RCYF1 | 42 mi | 38 min | 82°F | |||||
| GTXF1 - Guana Tolomato Matanzas Reserve, FL | 51 mi | 83 min | SE 4.1 | 75°F | 1022 hPa | 68°F |
Wind History for Fernandina Beach, FL
(wind in knots) EDIT (on/off) Help| 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 | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | 4 AM | |
| Last 24hr | SE | E | E | E G8 | SE G8 | E | SE G11 | NE G12 | E G14 | E G13 | E G12 | E G12 | E G12 | E G11 | E G9 | SE G9 | E | SE | SE G6 | SE | SE | SE | E | SE |
| 1 day ago | S | SE G9 | SE | S | S G11 | SE G10 | E G8 | E G10 | SE G11 | SE G11 | SE G14 | SE G15 | E G14 | E G14 | SE G10 | E G8 | E G7 | E | E G7 | SE | SE G6 | SE | SE G6 | SE G8 |
| 2 days ago | S G7 | S | S | S G7 | SW G10 | SW | W G6 | W G6 | SE G7 | E G11 | SE G9 | SE G11 | SE G10 | SE G12 | SE G10 | SE G10 | SE G9 | SE G9 | SE G11 | SE G11 | S G10 | S G7 | S G7 | S G9 |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Mayport Naval Station - Adm David L. McDonald Field, FL | 1 mi | 76 min | SE 5 | 10.00 mi | Fair | 75°F | 66°F | 74% | 1020.3 hPa |
| Jacksonville Craig Municipal Airport, FL | 8 mi | 75 min | N 0 | 10.00 mi | Fair | 66°F | 64°F | 96% | 1020.6 hPa |
| Fernandina Beach Municipal Airport, FL | 16 mi | 73 min | SE 4 | 10.00 mi | Partly Cloudy | 73°F | 66°F | 80% | 1020.7 hPa |
| Jacksonville International Airport, FL | 17 mi | 72 min | N 0 | 4.00 mi | Fog/Mist | 65°F | 64°F | 97% | 1020.4 hPa |
| Jacksonville Naval Air Station, FL | 18 mi | 75 min | SE 4 | 10.00 mi | A Few Clouds | 76°F | 64°F | 69% | 1020.3 hPa |
Wind History from NRB (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 24hr | SE | Calm | SE | SE | E | E | E | E | E | E | E | E | E | E | E | E | E | E | E | SE | SE | SE | SE | S |
| 1 day ago | S | S | S | S | SE | SE | SE | SE | SE | SE | E | E | E | E | E | E | SE | SE | SE | SE | SE | SE | SE | SE |
| 2 days ago | S | S | SW | SW | SW | W | E | E | SE | SE | SE | SE | SE | SE | SE | SE | S | S | S | S | SW | S | S | S |
Tide / Current Tables for St. Johns River at Navy degaussing structure, Florida
EDIT Weekend mode (on/off) (on/off) Help One Week of DataSt. Johns River at Navy degaussing structure
Click for Map
Fri -- 12:43 AM EDT Moonrise
Fri -- 12:58 AM EDT 2.56 feet High Tide
Fri -- 06:26 AM EDT Sunrise
Fri -- 07:24 AM EDT -1.52 feet Low Tide
Fri -- 11:25 AM EDT Moonset
Fri -- 01:20 PM EDT 1.69 feet High Tide
Fri -- 07:15 PM EDT -1.14 feet Low Tide
Fri -- 08:18 PM EDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Fri -- 12:43 AM EDT Moonrise
Fri -- 12:58 AM EDT 2.56 feet High Tide
Fri -- 06:26 AM EDT Sunrise
Fri -- 07:24 AM EDT -1.52 feet Low Tide
Fri -- 11:25 AM EDT Moonset
Fri -- 01:20 PM EDT 1.69 feet High Tide
Fri -- 07:15 PM EDT -1.14 feet Low Tide
Fri -- 08:18 PM EDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
| 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 | 6 pm | 7 pm | 8 pm | 9 pm | 10 pm | 11 pm |
| 2.3 | 2.6 | 2.3 | 1.6 | 0.6 | -0.4 | -1.1 | -1.5 | -1.4 | -1 | -0.3 | 0.5 | 1.3 | 1.7 | 1.6 | 1.1 | 0.3 | -0.4 | -0.9 | -1.1 | -1 | -0.6 | 0.1 | 0.9 |
Tide / Current Tables for St. Johns River Entrance, Florida Current (2) (expired 1999-12-31)
EDIT (on/off) Help One Week of DataSt. Johns River Entrance
Click for Map
Fri -- 12:24 AM EDT 1.87 knots Max Flood
Fri -- 12:43 AM EDT Moonrise
Fri -- 03:16 AM EDT -0.00 knots Slack
Fri -- 06:02 AM EDT -1.97 knots Max Ebb
Fri -- 06:26 AM EDT Sunrise
Fri -- 10:58 AM EDT 0.00 knots Slack
Fri -- 11:25 AM EDT Moonset
Fri -- 12:53 PM EDT 1.31 knots Max Flood
Fri -- 03:27 PM EDT -0.00 knots Slack
Fri -- 06:07 PM EDT -1.80 knots Max Ebb
Fri -- 08:18 PM EDT Sunset
Fri -- 10:55 PM EDT 0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Fri -- 12:24 AM EDT 1.87 knots Max Flood
Fri -- 12:43 AM EDT Moonrise
Fri -- 03:16 AM EDT -0.00 knots Slack
Fri -- 06:02 AM EDT -1.97 knots Max Ebb
Fri -- 06:26 AM EDT Sunrise
Fri -- 10:58 AM EDT 0.00 knots Slack
Fri -- 11:25 AM EDT Moonset
Fri -- 12:53 PM EDT 1.31 knots Max Flood
Fri -- 03:27 PM EDT -0.00 knots Slack
Fri -- 06:07 PM EDT -1.80 knots Max Ebb
Fri -- 08:18 PM EDT Sunset
Fri -- 10:55 PM EDT 0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
| 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 | 6 pm | 7 pm | 8 pm | 9 pm | 10 pm | 11 pm |
| 1.8 | 1.7 | 1.2 | 0.3 | -0.8 | -1.7 | -2 | -1.8 | -1.5 | -1.2 | -0.8 | 0 | 1 | 1.3 | 1 | 0.4 | -0.5 | -1.4 | -1.8 | -1.7 | -1.3 | -0.9 | -0.6 | 0.1 |
Weather Map and Satellite Images
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GOES Local Image of 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.
Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for Jacksonville, FL (5,6,7,8)
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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. |