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Marine Weather and Tides St. Augustine, 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.

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Sunrise 6:47AM

Sunset 8:14PM

Saturday August 8, 2020 8:09 AM EDT (12:09 UTC)

Moonrise 10:24PM

Moonset 10:11AM

Illumination 80%

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 081112 AFDJAX

Area Forecast Discussion National Weather Service Jacksonville FL 712 AM EDT Sat Aug 8 2020

AVIATION. [Through 12Z Sunday]

Moist Southwest flow continues but Precipitable Water Amounts have fallen below 2 inches as a small amount of dry air has pushed in aloft and this will cut down slightly on the storm coverage this afternoon so have opted to keep the VCTS in place at all TAF sites for now generally in the 20-24Z time range this afternoon and evening. Otherwise mainly VFR conds expected through tonight.

PREV DISCUSSION [249 AM EDT].

NEAR TERM [Through Tonight].

The area remains on the western periphery of the deep layer Atlantic ridge, with a mid-upper level shortwave over the TN Valley this morning that will translate eastward off the mid- Atlantic coastline this evening. Water vapor satellite imagery shows a much drier air mass currently associated with this air mass, particularly at the mid and upper levels. That said, our persistent low-level southwesterly flow will continue to feed warm, moist Gulf air to the region, so model guidance suggests there won't be much drop in PW values over the area today as this feature moves overhead. During the daytime hours, the low level southwest flow in place will favor a dominant Gulf coast sea breeze front affecting north-central FL and the Suwannee Valley, with the Atlantic sea breeze staying along the I-95 corridor. Instability today is forecast to be lower than the previous several days, so overall coverage will likely be lower. One factor that may also come into play late in the period is a quasi- stationary frontal boundary draped across Nrn GA/AL and Wrn SC which is poised to nudge southeastward into central GA/SC today before stalling out again for the night. Outflow from daytime convection on that boundary may advect into our area in the evening/overnight hours and, depending on how it interacts with residual local sea breeze boundaries, we could see convection linger late into the night. Main thunderstorm hazards will be the potential for downbursts of damaging wind gusts and heavy rainfall. Temperatures will be warm, peaking in the low-mid 90s this afternoon (heat index values of 100-106) and dipping into the mid-upper 70s overnight.

SHORT TERM [Sunday Through Monday].

Guidance continues to show a hot, humid, unstable airmass across forecast area during this period. Surface high pressure ridge axis will be just S of forecast area, resulting in a light southwesterly flow across the area. This will lead to a more eastward location of sea breeze collisions . when showers and t-storms will reach maximum coverage each afternoon. Could see a few strong/severe pulse storms with wet microbursts. This pattern will also support above normal temperatures with highs in the mid 90s inland, lower 90s coast . and afternoon heat index values in the 104-108 range. Low temperatures will be in the lower-mid 70s . except upper 70s coast.

LONG TERM [Tuesday Through Saturday].

During this period, the surface high pressure ridge is forecast to gradually shift northward and be across southern GA by Thu/Fri . resulting in more of an onshore flow pattern. This will tend to focus the greater coverage of afternoon showers/t-storms westward over the interior portions of se GA/ne FL by Thu/Fri. It will also lead to high and low temperatures by Thu/Fri a few degrees lower than that for Mon/Tue.

MARINE.

High pressure will sit in place to our east, rendering generally southwesterly flow during the night and morning hours, switching to south-southeast winds in the afternoon and evening with the sea breeze. This daily sea breeze circulation will also bring chances for evening showers and thunderstorms. Seas will remain low, around 3 feet or less.

Rip Currents: NE FL - Moderate risk of rip currents through Monday. SE GA - Low risk of rip currents through Monday.

FIRE WEATHER.

Warm, humid, and unstable conditions will continue through the weekend with daily afternoon and evening showers and thunderstorms forming along both west and east coast sea breezes. These boundaries will collide across inland areas during the afternoon where a few strong to briefly severe storms will be possible. Weak transport winds and lower mixing heights across north-central Florida under strengthening high pressure will create low daytime dispersion across NE FL despite unstable low level conditions. Winds will be less than 15 mph each day, except locally strong and gusty around thunderstorms.

PRELIMINARY POINT TEMPS/POPS.

AMG 94 74 94 74 94 / 40 30 70 30 70 SSI 90 78 91 78 91 / 30 20 50 30 50 JAX 94 76 95 75 95 / 30 20 60 30 60 SGJ 91 76 92 75 91 / 20 10 50 20 60 GNV 94 74 94 74 94 / 40 30 60 20 70 OCF 95 74 94 74 94 / 40 30 60 20 70

JAX WATCHES/WARNINGS/ADVISORIES. FL . None. GA . None. AM . None.

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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	69 min	Calm G 1	74°F	83°F		1021 hPa (+0.9)	73°F
41117	15 mi	43 min			83°F	1 ft
GTXF1 - Guana Tolomato Matanzas Reserve, FL	16 mi	84 min	SW 1	72°F			1022 hPa	71°F
LTJF1	35 mi	57 min		75°F				73°F
MYPF1 - 8720218 - Mayport (Bar Pilots Dock), FL	36 mi	51 min	WSW 5.1 G 6	77°F	85°F		1021 hPa
BLIF1	37 mi	57 min	WSW 4.1 G 5.1	77°F			1021.6 hPa	77°F
DMSF1	37 mi	51 min			86°F
NFDF1	40 mi	51 min	WSW 4.1 G 5.1	68°F				68°F

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

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Last 24hr

1 day ago

2 days ago

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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	73 min	N 0	10.00 mi	Fair	72°F	71°F	97%	1020.9 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: 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

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Wind Forecast for Jacksonville, FL (8,2,3,4)

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Ground Weather Radar Station Jacksonville, FL

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