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Marine Weather and Tides St. Augustine, FL Version 3.4

NOTICE 1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17. 1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

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Sunrise 6:49AM

Sunset 6:25PM

Monday March 1, 2021 8:44 PM EST (01:44 UTC)

Moonrise 9:09PM

Moonset 8:33AM

Illumination 88%

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.

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7 Day Forecast for Marine Location Near St. Augustine, FL

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Area Discussion for - Jacksonville, FL

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FXUS62 KJAX 012339 AFDJAX

Area Forecast Discussion National Weather Service Jacksonville FL 639 PM EST Mon Mar 1 2021

AVIATION. [Through 00Z Wednesday]

A cold front will push south of the area tonight and then stall across central Florida. Scattered showers are possible this evening at the TAF sites. Showers will increase in coverage through the day on Tuesday, especially for the coastal TAF sites. IFR cigs are expected to develop by midday Tuesday and then prevail through the rest of the period.

PREV DISCUSSION [322 PM EST].

NEAR TERM [Through Tonight].

A cold front has accelerated into SE GA early this afternoon and will continue to push south across NE FL through the evening hours. Ahead of the front, a weak prefrontal trough agitated a few showers late this morning, but this activity is not expected to continue and will subside through the afternoon as the cold front sinks southward. The bulk of shower activity, and an outside chance of a thunderstorm, will be focused along the front through the evening. The cold front will slow and stall across central FL tonight. Isentropic ascent downstream from an opening mid-level wave will increase shower coverage across SE GA through the overnight hours, while shower chances decrease across NE FL.

Behind the front, surface high pressure to our north will wedge southward along the First Coast tonight. As it does so, gradients will tighten and bring a surge of onshore/northeasterly flow. Short-lived and weak cold advection behind the front will lead to a cooler night compared to the last few, but readings will remain well-above normal. Lows will be the coolest across SE GA, in the lower 50s, and warm southward to the lower 60s north-central FL

SHORT TERM [Tuesday Through Wednesday Night].

The stalled front will remain to the south Tuesday morning, gradually becoming more diffuse, with onshore/easterly flow continuing under an extensive cloud cover. Meanwhile to the west, a cutoff low aloft will reemerge into the northern stream jet as it ejects northeastward into the Tennessee River valley, energizing a surface low over the northern Gulf. Low-level flow and surface winds will quickly veer southerly ahead of this feature, enhancing isentropic ascent over SE GA and lifting the stationary boundary to our south northward as a warm front. This will allow showers to persist over our GA zones throughout Tuesday, while coastal trough development will enhance shower chances over coastal areas. The aforementioned surface low will lift from the northeast Gulf across SE GA before consolidating/deepening along the Carolina coast Tuesday night. As this occurs, strong forcing for ascent will occur over the surface front, resulting in a heavy band of rainfall with embedded thunderstorms across the northern counties of SE GA, adjacent to the Altamaha River. Localized flooding will be possible with additional rainfall amounts of 1-2+ inches across portions of SE GA Tuesday night. Meanwhile, dry. A trailing cold front will shift across the entire forecast area from west to east on Wednesday, exiting into the Atlantic waters by the mid-afternoon. Scattered showers and potentially a few strong thunderstorms will accompany the front as it passes through the region. Winds will shift to the northwest behind the with skies gradually clearing from northwest to southeast behind the front Wednesday evening.

Highs will vary widely, with temps only reaching the mid 50s across SE GA where scattered showers and stratiform rain is expected. Most of NE FL will be on the cool-side of the stationary front, limiting highs to the low to mid 60s. Warmer temps, in the low 70s, are expected across north-central FL where more sunshine is expected to sneak through. Cloudy skies will continue ahead of the trailing cold front on Wednesday, with highs trending slightly warmer and occurring late morning prior to the frontal passage. Lows are expected to cool to near normal Wednesday night behind the front.

LONG TERM [Thursday Through Monday].

Cool high pressure will expand across the eastern US on Thursday and Friday before another upper level cut-off swings into the early Saturday morning. This feature will bring a chance of rain back to the area Saturday as the associated surface low pivots across the FL peninsula. Slightly cooler than normal temperatures are expected late this week under clear skies, with a more robust cool down this weekend behind the aforementioned system.

MARINE.

A cold front will shift southward over area waters through this evening as high pressure wedges along the Atlantic coast. A surge of northeasterly wind is expected leading to hazardous Small Craft conditions, with winds 20-25 knots and gusts near 30 knots. Seas will eventually build 6-9 feet offshore and 5-7 feet near shore on Tuesday and remain elevated through early Wednesday day. Winds will weaken as they veer southerly ahead of another cold front Tuesday night, then northerly behind the front Wednesday afternoon. With multiple frontal passages forecast over the next couple of days, periods of showers are expected over area waters through Wednesday morning. High pressure will build over the waters late this week ahead of another weather disturbance this weekend.

Rip Currents: Moderate Risk through Today, increasing to High Risk on Tuesday with increasing onshore flow and rising seas.

FIRE WEATHER.

Scattered showers and slight chance of thunder will continue through the rest of the afternoon and into the early evening as a cold front continues to move south NE FL. Surface and transport winds will shift to the north then trend to the east-northeast through Tuesday while remaining 15-20 mph. Despite favorable transport, daytime dispersions will trend lower on Tuesday (30-50 units) as abundant cloud cover will limit heating and hamper mixing. Best rain chances will be across SE GA through Tuesday night before another cold front sweeps across the area Wednesday morning/early afternoon. While acceptable dispersion is expected ahead of the front, dispersion will trend toward critically low values behind the front on Wednesday, particularly across SE GA.

HYDROLOGY.

An inch or two of rainfall is forecast across SE GA through Wednesday evening, with totals below an inch anticipated in NE FL. Heavier rainfall in Georgia will prolong flooding along portions of the Altamaha, Satilla, and Alapaha Rivers. Rises continue along the Santa Fe River, with moderate flooding at the Three Rivers Estates gage continuing through early next week.

PRELIMINARY POINT TEMPS/POPS.

AMG 50 55 46 61 41 / 40 80 90 40 0 SSI 53 60 53 65 47 / 30 80 90 70 0 JAX 56 63 55 69 47 / 30 60 70 60 0 SGJ 59 67 60 71 51 / 30 50 40 60 0 GNV 59 67 58 72 46 / 20 30 60 60 0 OCF 62 74 62 76 49 / 20 20 40 60 0

JAX WATCHES/WARNINGS/ADVISORIES. FL . None. GA . None. AM . Small Craft Advisory from 4 AM Tuesday to 10 PM EST Wednesday 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.

Small Craft Advisory from 4 AM Tuesday to 7 AM EST Wednesday for 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.

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
SAUF1 - St. Augustine, FL	3 mi	44 min	N 17 G 17	64°F	60°F		1017.8 hPa (+2.1)	63°F
41117	15 mi	48 min			65°F	3 ft
GTXF1 - Guana Tolomato Matanzas Reserve, FL	16 mi	119 min	SSE 1.9	72°F			1017 hPa	67°F
LTJF1	35 mi	74 min		66°F				61°F
JXUF1	36 mi	74 min			69°F
MYPF1 - 8720218 - Mayport (Bar Pilots Dock), FL	36 mi	74 min	NNE 6 G 8	65°F	65°F		1018.1 hPa
BLIF1	37 mi	74 min	NE 6 G 7	69°F			1018.6 hPa	66°F
DMSF1	37 mi	74 min			67°F
NFDF1	40 mi	74 min	NNE 2.9 G 4.1	69°F			1017.5 hPa	63°F

Wind History for I-295 Bridge, St Johns River, FL

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Last 24hr

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Northeast Florida Regional Airport, FL	6 mi	48 min	NNE 10	10.00 mi	Mostly Cloudy	68°F	61°F	78%	1018 hPa

Link to 5 minute data for KSGJ

Wind History from SGJ (wind in knots)

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Tide / Current Tables for St. Augustine, city dock, Florida

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Tide / Current Tables for East Tocoi, St. Johns River, Florida (4)

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Weather Map

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GEOS Local Image of    EDIT
NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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