Saturday, March28, 2020
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Marine Weather and Tides
Sawgrass, FL

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 7:17AMSunset 7:43PM Saturday March 28, 2020 1:19 PM EDT (17:19 UTC) Moonrise 8:53AMMoonset 10:37PM Illumination 21% Phase: Waxing Crescent; Moon at 5 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:202003282115;;197292 Fzus52 Kjax 281301 Cwfjax Coastal Waters Forecast For Northeast Florida/southeast Georgia National Weather Service Jacksonville Fl 901 Am Edt Sat Mar 28 2020 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. Amz450-452-454-282115- 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- 901 Am Edt Sat Mar 28 2020
.small craft exercise caution...
Rest of today..South southeast 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.
Tonight..South 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.
Sunday..South winds 10 to 15 knots. Seas 2 to 3 feet. Dominant period 5 seconds. Inland waters a moderate chop.
Sunday night..South winds 10 to 15 knots becoming west southwest 5 to 10 knots after midnight. Seas 2 to 3 feet. Dominant period 5 seconds. Inland waters a light chop.
Monday..North northwest winds 5 to 10 knots becoming east in the afternoon. Seas 1 to 2 feet. Dominant period 5 seconds. Inland waters a light chop.
Monday night..Southeast winds 5 to 10 knots becoming south after midnight. Seas 1 to 2 feet.
Tuesday..South southwest winds 10 to 15 knots. Seas 2 to 3 feet. A chance of showers and a slight chance of Thunderstorms.
Tuesday night..West southwest winds 15 to 20 knots. Seas 2 to 4 feet. A chance of showers and a slight chance of Thunderstorms.
Wednesday..Northwest winds 15 to 20 knots. Seas 2 to 4 feet. A slight chance of showers.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 901 Am Edt Sat Mar 28 2020
Synopsis.. Surface high pressure ridge will be located south of the area through the weekend. A southwest flow will continue, becoming southeast near the coast each afternoon. A weak dry cold front will push through the area Sunday night with another stronger cold front pushing through the local waters Tuesday night with potential small craft advisory conditions.
Gulf stream.. The approximate location of the west wall of the gulf stream as of mar 28, 2020 at 1200 utc... 71 nautical miles east of flagler beach. 79 nautical miles east of saint augustine beach. 90 nautical miles east of jacksonville beach. 102 nautical miles east southeast of st simons island. This data courtesy of the naval oceanographic office.


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


Area Discussion for - Jacksonville, FL
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FXUS62 KJAX 281256 AFDJAX

Area Forecast Discussion National Weather Service Jacksonville FL 856 AM EDT Sat Mar 28 2020

UPDATE.

Interior southeast Georgia with Alma, Waycross, and Douglass still reporting less than 1/4 mile visibility in fog will be a a little slower to clear out this morning. Otherwise most areas in the Suwannee Valley will be clearing of fog or just have some residual morning mist through 9 am. Have extended fog advisory across more portions of SE GA in areal coverage and until 10 am.

Robust High Pressure ridge over the GOMEX/FL Peninsula will hold steady and anchored with all-time record heat expected for the month of March today with Highs in the lower/middle 90s inland and mid/upper 80s at the beaches with SE Atlc sea breeze pinned close to the coast. Dry airmass with PWATS less than 1" will preclude showers.

PREV DISCUSSION [815 AM EDT].

NEAR TERM [Through Tonight].

Early this morning: Moist Low level flow off the NE GOMEX will help to develop another round of dense fog across the Suwannee Valley/I-75 corridor of inland North FL and spread north into inland SE GA through sunrise and dense fog advisories may be needed again if it becomes widespread.

Today: Strong High Pressure ridge over the GOMEX/FL Peninsula will remain in place with all-time record heat expected for the month of March today with Highs in the lower/middle 90s inland and mid/upper 80s at the beaches with SE Atlc sea breeze pinned close to the coast. Dry airmass with PWATS less than 1" will prevent any shower activity.

Tonight: Mostly clear skies expected again underneath high pressure with lows in the lower 60s inland and middle 60s near the coast. More dense fog possible over inland areas once again towards sunrise Sunday morning.

SHORT TERM [Sunday Through Monday].

High pressure ridge at the surface and aloft gets shunted southward a bit as weak frontal boundary with very little moisture pushes south into the area Sunday Night and weak high pressure ridge builds back into the region on Monday. The increase in SW flow on Sunday will keep all-time record March heat in place with highs once again in the lower/middle 90s inland and pushes the heat towards the beaches where highs will be in the upper 80s/near 90 degrees as sea breeze struggles to develop late in the day. Lack of moisture should keep rain chances with weak front at 10% or less Sunday Night and above normal lows in the 60s. Weaker SW flow will allow for sea breeze fronts to push further inland for slightly cooler temps at the Atlc beaches in the 80s, but highs into the lower 90s will continue over inland areas.

LONG TERM [Tuesday Through Friday].

Tue & Tue Night: Models still in decent agreement on low pressure development over the SE US on Tuesday and intensifying as it tracks into the Carolinas Tue Night. This will lead to on more day of near record breaking heat with highs in the upper 80s/near 90 area-wide with breezy SW flow ahead of the trailing cold frontal passage expected by Tuesday Night. Pre-frontal showers and storms can be expected with potential for isolated severe storms, with best chances of rainfall and severe weather across SE GA with lessening storm impacts and rainfall coverage into NE FL.

Wed/Thu/Fri: A cooler/drier NW flow behind the front will lead to Max temps closer to climo values to start April mostly in the 70s to near 80 degrees. Lows will actually fall into the 40s over inland areas Wed Night, otherwise lows generally in the 50s through the dry period under Mostly Clear to Partly Cloudy skies.

AVIATION. [Through 12Z Sunday]

Some MVFR fog is lingering over the Suwannee Valley and interior southeast Georgia, but this fog is less prevalent or non-existent over the terminal forecast sites across the region. VFR conditions are expected over the terminal sites through the evening hours. Mainly a scattered to broken cirrus deck is prevail over terminal sites this morning and will further scatter during the late morning and afternoon. A south then southwest will prevail today at 5 to 10 knots with slightly higher prevailing winds along the coast, with some coastal terminals such as SSI and SGJ having some wind gusts around 16-18 knots after the sea breeze passage this afternoon. The Atlantic sea breeze moves onshore and past SGJ by 17Z, SSI by 18Z and CRG after 20Z. Surface winds will shift to southeasterly at these terminals, with sustained speeds increasing to near 10 knots, except 10-15 knots at SSI and SGJ. There is potential for some intervals of MVFR fog late tonight (the pre-dawn hours) near GNV terminal.

MARINE.

Surface ridge will remain offshore with approaching weak front on Sunday to continue Southerly flow through the weekend. Speeds at 15-20 knots Today and Tonight with SCEC headlines will weaken to 10-15 knots on Sunday. Weak frontal boundary still slides through the waters Sunday Night with a shift to light onshore/NE flow on Monday. Winds become SW ahead on the next front on Tuesday and increase to potential Small Craft Advisory levels with the frontal passage Tuesday Night. Gusty NW/Offshore flow expected to develop behind the front on Wednesday.

Rip Currents: Moderate Risk for NE FL with surf/breakers at 2-3 ft, while Low Risk exists for SE GA with surf 1-2 ft.

FIRE WEATHER.

Minimum humidities will fall into the 30-40% range each afternoon through the weekend, but remain above critical levels. Also the hot and dry conditions will lead to slightly higher daytime dispersion values.

PRELIMINARY POINT TEMPS/POPS.

AMG 91 62 91 63 87 / 0 0 0 0 0 SSI 81 66 85 66 81 / 0 0 0 0 0 JAX 93 65 93 64 89 / 0 0 0 0 0 SGJ 88 65 90 65 85 / 0 0 0 0 0 GNV 93 62 91 62 89 / 0 0 0 0 0 OCF 94 62 92 62 90 / 0 0 0 0 0

JAX WATCHES/WARNINGS/ADVISORIES.

GA . Dense Fog Advisory until 10 AM EDT this morning for Appling- Bacon-Jeff Davis-Pierce.

Dense Fog Advisory until 10 AM EDT this morning for Atkinson- Clinch-Coffee-Echols-Northern Ware-Southern Ware.

AM . None.


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LTJF1 14 mi55 min 82°F 69°F
MYPF1 - 8720218 - Mayport (Bar Pilots Dock), FL 15 mi49 min E 7 G 9.9 78°F 69°F1018.1 hPa
BLIF1 16 mi55 min WSW 5.1 G 7 83°F 1018.5 hPa64°F
DMSF1 17 mi49 min 75°F
41117 20 mi49 min 73°F3 ft
NFDF1 20 mi49 min S 4.1 G 5.1 81°F
SAUF1 - St. Augustine, FL 24 mi19 min SE 12 G 13 72°F 66°F1018.1 hPa (-0.8)
FRDF1 - 8720030 - Fernandina Beach, FL 34 mi49 min SSE 5.1 G 8 90°F 71°F1017.8 hPa
41112 - Offshore Fernandina Beach, FL (132) 36 mi19 min 71°F2 ft
GTXF1 - Guana Tolomato Matanzas Reserve, FL 37 mi94 min S 4.1 83°F 1020 hPa68°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 mi27 minSSW 710.00 miFair85°F63°F48%1017.5 hPa
Mayport Naval Station - Adm David L. McDonald Field, FL14 mi28 minSE 1010.00 miFair79°F68°F69%1017.6 hPa
Northeast Florida Regional Airport, FL15 mi24 minESE 1210.00 miFair81°F70°F69%1017.9 hPa
Jacksonville Naval Air Station, FL17 mi27 minSE 810.00 miA Few Clouds86°F63°F46%1017.4 hPa

Link to 5 minute data for KCRG

Wind History from CRG (wind in knots)
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Last 24hrSW8SW5S9SW9SE8SE10S9S7S5S4SW3CalmS4S3CalmCalmCalmCalmCalmCalmSW64SW5SW7
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NW6W9W9W8W9SW9W6W5W5N4NW4N4NE5NE8E10E10E12E9
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Tide / Current Tables for Palm Valley, ICWW, Florida
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Palm Valley
Click for Map
Sat -- 01:32 AM EDT     1.89 feet High Tide
Sat -- 07:19 AM EDT     Sunrise
Sat -- 08:08 AM EDT     -2.23 feet Low Tide
Sat -- 09:52 AM EDT     Moonrise
Sat -- 01:36 PM EDT     1.46 feet High Tide
Sat -- 07:42 PM EDT     Sunset
Sat -- 08:26 PM EDT     -2.35 feet Low Tide
Sat -- 11:37 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.51.81.91.610.1-0.8-1.6-2.2-1.8-0.70.41.11.41.41.20.7-0.1-0.9-1.6-2.2-2.2-1.10.2

Tide / Current Tables for St. Johns River Entrance, Florida Current
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St. Johns River Entrance
Click for Map
Sat -- 01:38 AM EDT     -0.00 knots Slack
Sat -- 04:15 AM EDT     -2.14 knots Max Ebb
Sat -- 07:18 AM EDT     Sunrise
Sat -- 08:29 AM EDT     0.00 knots Slack
Sat -- 09:52 AM EDT     Moonrise
Sat -- 10:56 AM EDT     1.64 knots Max Flood
Sat -- 01:57 PM EDT     -0.00 knots Slack
Sat -- 04:33 PM EDT     -1.85 knots Max Ebb
Sat -- 07:42 PM EDT     Sunset
Sat -- 08:20 PM EDT     0.00 knots Slack
Sat -- 11:14 PM EDT     2.20 knots Max Flood
Sat -- 11:38 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.50.7-0.4-1.5-2.1-2-1.6-1.1-0.40.51.31.61.30.7-0-1-1.7-1.8-1.4-1-0.30.61.62.2

Weather Map
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wmap_A
GEOS 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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Jacksonville, FL (13,3,4,5)
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Ground Weather Radar Station Jacksonville, FL
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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 numerous 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.