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. Privacy and Cookie policy

AMZ454 Expires:202312112230;;289155 Fzus52 Kjax 111501 Cwfjax
coastal waters forecast for northeast florida/southeast georgia national weather service jacksonville fl 1001 am est Mon dec 11 2023
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.
amz450-452-454-112230- 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 est Mon dec 11 2023
.small craft exercise caution...
Rest of today..North winds 15 to 20 knots, diminishing to 10 to 15 knots in the afternoon. Seas 3 to 5 feet with a dominant period 7 seconds. Intracoastal waters choppy.
Tonight..North winds 10 to 15 knots. Seas 2 to 4 feet with a dominant period 8 seconds. Intracoastal waters a moderate chop.
Tuesday..Northeast winds 10 to 15 knots. Seas 3 to 4 feet with a dominant period 8 seconds. Intracoastal waters a moderate chop.
Tuesday night..Northeast winds 15 to 20 knots. Seas 4 to 5 feet with a dominant period 5 seconds. Intracoastal waters choppy.
Wednesday..Northeast winds 15 to 20 knots. Seas 4 to 6 feet with a dominant period 6 seconds. Intracoastal waters choppy.
Wednesday night..Northeast winds 20 to 25 knots. Seas 5 to 7 feet with a dominant period 6 seconds. Intracoastal waters rough. A slight chance of showers after midnight.
Thursday..Northeast winds 20 to 25 knots, increasing to 25 to 30 knots in the afternoon. Seas 6 to 8 feet, building to 7 to 10 feet in the afternoon. A slight chance of showers.
Thursday night..Northeast winds 25 to 30 knots, diminishing to 20 to 25 knots after midnight. Seas 8 to 11 feet. A slight chance of showers.
Friday..Northeast winds 20 to 25 knots. Seas 8 to 11 feet. A slight chance of showers.
Friday night..East winds 15 to 20 knots. Seas 7 to 10 feet. A chance of showers.

AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 1001 Am Est Mon Dec 11 2023
Synopsis..
small craft advisory level wind speeds and seas expected for the offshore waters adjacent to northeast florida. Winds and seas will briefly subside overnight as high pressure migrates northeast to a position over the southern appalachians. This high pressure center will then strengthen as it becomes anchored over the carolinas on Tuesday, resulting in strengthening northeast winds and building seas throughout our local waters. Winds and seas will increase back to small craft advisory levels offshore by Wednesday, with occasional gale force wind gusts beginning on Wednesday night. Small craft advisory conditions will begin for the near shore waters on Wednesday evening. An extended period of strong onshore winds and building seas is expected into the upcoming weekend as strong high pressure remains situated to the north of our waters and low pressure gradually takes shape over the eastern gulf of mexico. A coastal trough developing over our near shore waters will also generate occasional showers beginning on Wednesday.
Gulf stream..
the approximate location of the west wall of the gulf stream as of dec 09, 2023 at 1200 utc...
50 nautical miles east of flagler beach. 53 nautical miles east of saint augustine beach. 61 nautical miles east of jacksonville beach. 78 nautical miles east of st simons island.
this data courtesy of the naval oceanographic office.

FXUS62 KJAX 111633 AFDJAX

Area Forecast Discussion National Weather Service Jacksonville FL 1133 AM EST Mon Dec 11 2023

New AVIATION

UPDATE
Issued at 1008 AM EST Mon Dec 11 2023

For the latest NE FL and SE GA Daily Key Messages please visit: https:// www.weather.gov/media/jax/briefings/nws-jax-briefing.pdf

Not much change in the forecast today as broad high pressure around 1026 mb located over the lower MS valley to central TN works slowly into the area, but will be shift up into the Appalachians tonight. While winds will decrease early today to 10-15 mph, the temps will be chilly as cool advection continues. Have shaved off a couple of degrees from the max temps today based on latest guidance and model thickness fields. Should end up about 7-10 deg below normal but will have full sun.

For the marine forecast, have let parts of small craft advy expire. Latest observations, as well as GOES derived low level wind show 15-25 kt over waters, but taking about 80 percent of the GOES values, shows we have winds near 20 kt offshore. So SCA offshore waters still looks very reasonable, with seas up to 5-7 ft, highest near the outside waters near the Gulf Stream.
Probably will be able to let the next SCA (AMZ472, 474) expire about 3 PM.

SYNOPSIS
Issued at 352 AM EST Mon Dec 11 2023

Overnight surface analysis depicts a strong cold front racing eastward off of FL's Atlantic coast and Keys, with strengthening low pressure (999 millibars) situated along this front over the Mid-Atlantic region that was accelerating northward towards coastal New England. Meanwhile, high pressure (1026 millibars) was centered over the western Gulf of Mexico in the wake of this front, with this surface ridge quickly building into the southeastern states
Aloft
troughing along the U.S. eastern seaboard was taking on a negative tilt, while a reinforcing shortwave trough was diving east-southeastward across the Upper Midwest and the Mid-Mississippi Valley. Following an impressive wind event during the cold frontal passage on Sunday evening across portions of our region, northwesterly winds have subsided but remain breezy. The back edge of lower stratus and stratocumulus cloudiness has cleared inland southeast GA and western portions of the Suwannee Valley as of 09Z, where temperatures were plunging through the low to mid 40s.
Temperatures were falling to around 50 degrees along the northeast FL coast. Dewpoints ranged from the mid 30s along the Ocmulgee and upper portions of the Altamaha Rivers to the mid and upper 40s along the northeast FL coast.

NEAR TERM
(Today and Tonight)
Issued at 352 AM EST Mon Dec 11 2023

Low stratus and stratocumulus cloudiness, driven by strong cold air advection, will push offshore of our Atlantic coast well before sunrise. High pressure building along the northern Gulf coast and the southeastern states will migrate northeastward today, reaching a position over the southern Appalachians tonight.
Despite sunny skies today, cold air advection will keep highs in the mid to upper 50s for locations along and north of the Interstate 10 corridor as well as coastal locations, with highs climbing to the lower 60s this afternoon for inland locations south of Gainesville. Gusty northwesterly winds this morning will subside towards noon as our local pressure gradient loosens.

A reinforcing shortwave trough that will be diving east- southeastward from the Mid-Mississippi Valley through the Tennessee Valley and the Carolinas tonight will be accompanied by a 110-knot jet streak at 250 millibars (around 35,000 feet). This jet streak, positioned well north of our region, will begin to advect thin cirrus into our area from south to north overnight.
Winds at inland locations will quickly decouple around sunset, setting the stage for radiational cooling overnight. A light northerly breeze will likely continue overnight at coastal locations as high pressure begins to strengthen over the Appalachians and wedges down the southeastern seaboard. This weather pattern will result in a large temperature gradient across our region by early Tuesday morning, with lows falling to near freezing across inland southeast GA, the Suwannee Valley, and for locations along the I-10 corridor to the west of downtown Jacksonville. A Frost Advisory has been issued for these locations overnight through early Tuesday morning, and a light freeze cannot be ruled out for locations northwest of Waycross and Jesup.
Lows will remain in the low to mid 40s overnight for locations along and east of the I-95 corridor, with coastal temperatures possibly rising towards sunrise as our local pressure gradient begins to tighten.

SHORT TERM
(Tuesday through Thursday)
Issued at 352 AM EST Mon Dec 11 2023

Strengthening high pressure will be centered just to the north Tuesday, beginning what will be a prolonged period with elevated onshore flow. While high pressure will be centered a little further to the north by Thursday, the high will be even stronger.
In addition, inverted troughing over the coastal waters will help to pinch the pressure gradient along the coast, leading to gustier winds, especially at the coast. Wind gusts of 30 to 40 mph will be common along the coast by Thursday.

This will be a mainly dry period, but increasing moisture and convergence due to coastal trough could lead to a few coastal showers later in this period. And the moist onshore flow will also keep the region mainly cloudy during the period.

High temperatures will trend a little below normal this period, due to combination of cloud coverage and onshore flow across relatively cooler coastal waters. A broad range in temperatures is expected for the night times due to northeast flow across the waters. Lows Tuesday night lows will range from the upper 30s inland SE GA, to the mid 50s along the NE FL coast. For Wednesday night lows will range from mid 40s inland SE GA, to around 60 along the NE FL coast.

LONG TERM
(Thursday Night through Sunday)
Issued at 352 AM EST Mon Dec 11 2023

Strong high pressure will remain to the north through at least Friday. This will continue the elevated onshore flow, especially at area beaches.

Long range models are inconsistent with how fast moisture returns from the south, but the chance for showers increases through the weekend.

With continued onshore flow, cloud coverage and increasing precipitation chances temperatures will trend a little below normal during the day, but near to above at night.

AVIATION
(18Z TAFS)
Issued at 1132 AM EST Mon Dec 11 2023

VFR. Northerly winds near 8-12 kt at 18z today will continue to subside tonight. Late tonight and into daytime hours on Tuesday, winds will veer around more to the northeast, mainly after 14z at 8-14 kt. Gustier winds at CRG and SGJ late morning and aftn on Tuesday. Mostly cirrus clouds will increase from south to north during the overnight and predawn hours on Tuesday. A few mid layer clouds start to move toward GNV by 18z Tuesday.

MARINE
Issued at 352 AM EST Mon Dec 11 2023

High pressure building into the southeastern states in the wake of the overnight cold frontal passage will keep Small Craft Advisory level wind speeds throughout our local waters through the mid- morning hours, with Small Craft Advisory conditions continuing into the late afternoon hours for the offshore waters adjacent to northeast Florida. Speeds should drop below Small Craft Advisory levels for the near shore waters and the offshore waters adjacent to southeast GA before noon. Seas of 3-5 feet are expected today for the near shore waters, with seas of 5-7 feet offshore that will subside to 4-5 feet this afternoon for the offshore waters adjacent to southeast GA.

Winds and seas will briefly subside overnight as high pressure migrates northeastward to a position over the southern Appalachians. Seas will subside to the 2-4 foot range near shore this evening, with 3-5 foot seas forecast offshore. This high pressure center will then strengthen as it becomes anchored over the Carolinas on Tuesday, resulting in strengthening northeasterly winds and building seas throughout our local waters. Winds and seas will increase back to Small Craft Advisory levels offshore by Wednesday, with occasional Gale Force wind gusts beginning on Wednesday night. Small Craft Advisory conditions will begin for the near shore waters on Wednesday evening.

An extended period of strong onshore winds and building seas is expected into the upcoming weekend as strong high pressure remains situated to the north of our waters and low pressure gradually takes shape over the eastern Gulf of Mexico. A coastal trough developing over our near shore waters will also generate occasional showers beginning on Wednesday. Seas near shore will build to the 7-10 foot range for the near shore waters by Thursday, with offshore seas likely building above 10 feet by Thursday night.

Rip Currents: Strong offshore winds through around noon should result in a low rip current risk at all area beaches today. Winds will become onshore by Tuesday morning, with gradually strengthening speeds and building seas resulting in a moderate rip current risk at all area beaches on Tuesday. A high risk of dangerous rip currents is expected from Wednesday through the upcoming weekend.

PRELIMINARY POINT TEMPS/POPS
AMG 56 32 60 38 / 0 0 0 0 SSI 58 43 62 49 / 0 0 0 0 JAX 59 37 64 49 / 0 0 0 0 SGJ 59 46 68 57 / 0 0 0 10 GNV 60 37 67 49 / 0 0 0 0 OCF 61 38 68 52 / 0 0 0 0

JAX WATCHES/WARNINGS/ADVISORIES
FL...Frost Advisory from 2 AM to 8 AM EST Tuesday for FLZ020-021-023- 024-030-035-122-222.

GA...Frost Advisory from 2 AM to 8 AM EST Tuesday for GAZ132>136-149- 151>153-162-163-165-250-264-350-364.

AM...Small Craft Advisory until 3 PM EST this afternoon for AMZ472- 474.

toggle option: (graph/table)

East Tocoi
Click for Map
Mon -- 12:31 AM EST     5.81 feet High Tide
Mon -- 05:51 AM EST     Moonrise
Mon -- 07:10 AM EST     4.94 feet Low Tide
Mon -- 07:11 AM EST     Sunrise
Mon -- 01:04 PM EST     5.94 feet High Tide
Mon -- 04:15 PM EST     Moonset
Mon -- 05:27 PM EST     Sunset
Mon -- 07:47 PM EST     5.01 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION

East Tocoi, St. Johns River, Florida, Tide feet

Palmetto Bluff
Click for Map
Mon -- 12:53 AM EST     4.97 feet High Tide
Mon -- 05:51 AM EST     Moonrise
Mon -- 07:11 AM EST     Sunrise
Mon -- 07:32 AM EST     4.01 feet Low Tide
Mon -- 01:24 PM EST     5.12 feet High Tide
Mon -- 04:15 PM EST     Moonset
Mon -- 05:27 PM EST     Sunset
Mon -- 08:11 PM EST     4.07 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Palmetto Bluff, St. Johns River, Florida, Tide feet

Full Color Weather Map

Link to Loop


Other links: GEOS-West     Contential US     Full GOES-East

Jacksonville, FL,