Marine Weather Net

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


TONIGHT

ESE
WINDS
10 - 15
KNOTS

MONDAY

E
WINDS
15 - 20
KNOTS

MONDAY NIGHT

ESE
WINDS
15 - 20
KNOTS

TUESDAY

ESE
WINDS
10 - 15
KNOTS

The Marine Weather Forecast In Detail:
AMZ472 Forecast Issued: 233 PM EDT Sun May 24 2020

Tonight...East Southeast Winds 10 To 15 Knots. Seas 3 To 5 Feet With Occasional Seas Up To 6 Feet. Dominant Period 9 Seconds.
Monday...East Winds 15 To 20 Knots. Seas 3 To 5 Feet With Occasional Seas Up To 6 Feet. Dominant Period 7 Seconds. A Chance Of Showers And A Slight Chance Of Thunderstorms.
Monday Night...East Southeast Winds 15 To 20 Knots. Seas 4 To 6 Feet With Occasional Seas Up To 8 Feet. Dominant Period 6 Seconds. Showers Likely And A Slight Chance Of Thunderstorms.
Tuesday...East Southeast Winds 10 To 15 Knots. Seas 4 To 5 Feet With Occasional Seas Up To 6 Feet. Dominant Period 6 Seconds. Showers Likely And A Chance Of Thunderstorms.
Tuesday Night...Southeast Winds 10 To 15 Knots. Seas 3 To 5 Feet With Occasional Seas Up To 6 Feet. Dominant Period 7 Seconds. A Chance Of Showers And A Slight Chance Of Thunderstorms.
Wednesday...Southeast Winds 5 To 10 Knots. Seas 3 To 4 Feet. Dominant Period 7 Seconds. A Chance Of Showers And A Slight Chance Of Thunderstorms.
Wednesday Night...South Winds 5 To 10 Knots. Seas 3 To 4 Feet. A Chance Of Showers And Thunderstorms.
Thursday...Southeast Winds 5 To 10 Knots. Seas 3 To 5 Feet With Occasional Seas Up To 6 Feet. A Chance Of Showers. A Slight Chance Of Thunderstorms. A Chance Of.
Friday...Southeast Winds 5 To 10 Knots. Seas 3 To 5 Feet With Occasional Seas Up To 6 Feet. A Chance Of Showers. A Slight Chance Of Thunderstorms. A Chance Of.
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AMZ400: Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm
233 PM EDT Sun May 24 2020

High pressure will be north northeast of the region through Monday. An inverted trough is expected to develop across region Tuesday, with this trough lingering into Wednesday. The trough will then lift north and weaken Wednesday night. High pressure will build to the northeast Thursday through the weekend.

Gulf Stream
The approximate location of the west wall of the Gulf Stream as of May 23, 2020 at 1200 UTC...
- 57 nautical miles east of Flagler Beach.
- 66 nautical miles east of Saint Augustine Beach.
- 80 nautical miles east of Jacksonville Beach.
- 98 nautical miles east southeast of St Simons Island.
Area Forecast Discussion
National Weather Service Jacksonville FL
825pm EDT Sunday May 24 2020

Near Term - Through Tonight
Isolated convection today has ended as airmass stabilizes this evening. Skies will be mostly cloudy overnight as abundant high cloudiness continues to spread north from the eastern Gulf and south Florida. Mid-upper trough axis over the Florida straits will lift north into north Fl on Monday spreading rain with isolated thunderstorms across ne Fl. Warm and humid conditions will persist overnight with lows in the low/mid 70s. Temperatures on Monday will be held down due to cloud cover and rain with highs in the lower 80s over ne FL...and low/mid 80s over se Ga where rain coverage will be less.

Short Term - Monday through Wednesday
High pressure will remain centered to the north northeast through the day Monday. First area of short wave energy will pass to the north Monday morning, which may yield a break in activity early in the day, but another wave is expected to move back north across region Monday afternoon. This wave combined with diurnal instability will initate showers and storms over forecast area with scattered to numerous coverage Monday afternoon through the evening, and into the night.

An inverted surface trough is expected to develop in the wake of the upper wave Tuesday afternoon. This trough will lay across area Tuesday afternoon through Wednesday, providing a focus for convection.

Temperatures will trend below normal through Tuesday, then a little above normal Wednesday.

.Long Term.../Wednesday night through Sunday/... The trough will move off to the north northeast and weaken Wednesday night into Thursday, as surface high pressure rebuilds to the northeast. This high will build southwest across forecast area through the weekend. The resulting onshore flow pattern will allow the east coast sea breeze to push well inland each day. Convection will initiate each afternoon on the sea breeze as diurnal instability builds.

Temperatures will trend above normal this period.

NOAA Jacksonville FL Office: Watches - Warnings - Advisories
FL...None. GA...None. AM...None.