Marine Weather Net

Fernandina Beach to St. Augustine, FL 20 - 60 NM Marine Forecast


10 - 15


10 - 15


5 - 10


5 - 10

The Marine Weather Forecast In Detail:
AMZ472 Forecast Issued: 226 AM EDT Sun Mar 29 2020

Today...South Winds 10 To 15 Knots. Seas 3 To 5 Feet With Occasional Seas Up To 6 Feet. Dominant Period 5 Seconds.
Tonight...South Winds 10 To 15 Knots Becoming West After Midnight. Seas 3 To 4 Feet. Dominant Period 5 Seconds.
Monday...North Northwest Winds 5 To 10 Knots Becoming Northeast In The Afternoon. Seas 2 To 3 Feet. Dominant Period 5 Seconds.
Monday Night...Southeast Winds 5 To 10 Knots Becoming South 10 To 15 Knots After Midnight. Seas 2 To 3 Feet. Dominant Period 8 Seconds.
Tuesday...South Southwest Winds 15 To 20 Knots. Seas 2 To 4 Feet. Dominant Period 6 Seconds. A Chance Of Showers And A Slight Chance Of Thunderstorms.
Tuesday Night...West Winds 20 To 25 Knots. Seas 4 To 6 Feet With Occasional Seas Up To 8 Feet. Showers Likely And A Chance Of Thunderstorms.
Wednesday...North Northwest Winds 15 To 20 Knots. Seas 4 To 6 Feet With Occasional Seas Up To 8 Feet.
Wednesday Night...North Northeast Winds 15 To 20 Knots. Seas 4 To 6 Feet With Occasional Seas Up To 8 Feet.
Thursday...North Northeast Winds 10 To 15 Knots. Seas 5 To 7 Feet With Occasional Seas Up To 9 Feet.
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AMZ400: Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm
226 AM EDT Sun Mar 29 2020

Surface high pressure ridge will remain south of the area Today. A weak, dry cold front will push through the area late Tonight with another stronger cold front pushing through the local waters Tuesday night with potential for Small Craft Advisory conditions. High pressure will build north of the area Wednesday and Thursday.

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.
Area Forecast Discussion
National Weather Service Jacksonville FL
406am EDT Sunday Mar 29 2020

Satl imagery and surface obs continue to show dense fog tracking towards the NE and have expanded the dense fog advisory to account for this through sunrise over the next 2-3 hours.

Near Term - Through Tonight
Early this morning: Widespread dense fog over inland NE FL/I-75 corridor and the Suwannee River Valley of inland SE GA will continue to spread slowly E-NE and current dense fog advisory may need to be expanded through sunrise before if lifts/dissipates during the mid-morning hours.

Today: Another day of record heat expected in hot and dry SW flow with highs in the lower/middle 90s inland and pinned Atlantic sea breeze near the coast will push Max Temps into the mid/upper 80s at the beaches.

Tonight: Weak dry/frontal passage expected but very little airmass change as mild overnight lows in the 60s and another chance at dense fog over inland NE FL once again towards sunrise Monday.

.SHORT TERM [Monday Through Tuesday]... Monday: With little airmass change and weak high pressure ridge in place expect near record highs and dry conditions to continue with highs near 90 degrees inland, while Atlantic beaches will be slightly cooler with a stronger sea breeze and highs in the lower/middle 80s.

Monday Night: Old frontal boundary starts to lift back northward across the region as a warm front and a bit more cloud cover is expected with mild overnight lows in the 60s once again and some patchy fog is possible but not as dense as previous nights.

Tuesday: Low pressure develops over SE US and track across GA during the afternoon hours and into the Carolinas Tuesday Night. This feature will bring one more day with above normal Max Temps into the 80s/near 90 while breezy SW winds develop at 15-25 mph with gusts around 35 mph at times. Severe storms will be possible by the afternoon and evening hours ahead of a trailing cold front with best chances of storms with damaging winds/isolated tornadoes and hail across SE GA with lesser chances of severe storm coverage across NE FL where coverage will be limited by drier airmass already in place. Cold front and storms should clear the region during the overnight hours as they push offshore. Partial clearing is expected and temps should fall into the 50s by Wednesday Morning.

.LONG TERM [Wednesday Through Saturday]... 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 Wednesday Night, otherwise lows generally in the 50s through the dry period under Mostly Clear to Partly Cloudy skies.

Sat: Long range models not in great agreement at this time frame but as High pressure pushes offshore, some moisture return in southerly flow ahead of next shortwave aloft could provide for some widely scattered showers or an isolated storm with Max Temps slightly above normal around 80 degrees.

NOAA Jacksonville FL Office: Watches - Warnings - Advisories
FL...Dense Fog Advisory until 9am EDT this morning for Baker- Bradford-Central Marion-Clay-Eastern Alachua-Eastern Marion- Gilchrist-Hamilton-Inland Duval-Inland Nassau-Northern Columbia-Putnam-Southern Columbia-Suwannee-Union-Western Alachua-Western Marion.

GA...Dense Fog Advisory until 9am EDT this morning for Atkinson- Bacon-Brantley-Clinch-Coffee-Echols-Northeastern Charlton- Northern Ware-Pierce-Southern Ware-Western Charlton.