Marine Weather Net

Altamaha Sound to Fernandina Beach FL Marine Forecast


TONIGHT

W
WINDS
10 - 15
KNOTS

FRIDAY

NNW
WINDS
15 - 20
KNOTS

FRIDAY NIGHT

N
WINDS
5 - 10
KNOTS

SATURDAY

E
WINDS
5 - 10
KNOTS

The Marine Weather Forecast In Detail:
AMZ450 Forecast Issued: 253 PM EDT Thu Apr 09 2020

SMALL CRAFT EXERCISE CAUTION
Tonight...West Winds 10 To 15 Knots Becoming Northwest 15 To 20 Knots In The Morning. Seas 2 To 3 Feet. Dominant Period 3 Seconds. Inland Waters A Moderate Chop. Isolated Thunderstorms Expected This Evening.
Friday...North Northwest Winds 15 To 20 Knots. Seas 2 To 4 Feet. Dominant Period 4 Seconds. Inland Waters A Moderate Chop. A Chance Of Showers.
Friday Night...North Winds 5 To 10 Knots. Seas 2 To 3 Feet. Dominant Period 5 Seconds. Inland Waters A Light Chop.
Saturday...East Winds 5 To 10 Knots. Seas 1 To 2 Feet. Dominant Period 5 Seconds. Inland Waters A Light Chop.
Saturday Night...Southeast Winds 10 To 15 Knots. Seas 2 To 4 Feet. Dominant Period 4 Seconds. Inland Waters A Moderate Chop.
Sunday...South Southeast Winds 15 To 20 Knots. Seas 3 To 5 Feet With Occasional Seas Up To 6 Feet. Dominant Period 5 Seconds. Inland Waters Choppy. A Chance Of Showers And A Slight Chance Of Thunderstorms.
Sunday Night...South Winds 20 To 25 Knots. Seas 4 To 6 Feet With Occasional Seas Up To 8 Feet. Showers Likely And A Chance Of Thunderstorms.
Monday...Southwest Winds 15 To 20 Knots. Seas 3 To 5 Feet With Occasional Seas Up To 6 Feet. Showers And A Chance Of Thunderstorms.
Monday Night...West Winds 5 To 10 Knots. Seas 2 To 4 Feet. A Chance Of Showers And A Slight Chance Of Thunderstorms.
Tuesday...West Southwest Winds 5 To 10 Knots Becoming South Southeast In The Afternoon. Seas 2 To 3 Feet. A Chance Of Showers And A Slight Chance Of Thunderstorms.
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AMZ400: Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm
253 PM EDT Thu Apr 9 2020

A cold front will cross the waters this evening with a few isolated showers and storms. High pressure will build north of the waters on Friday and then offshore into the Atlantic on Saturday. Warm front will lift back north through the waters on Sunday then the next strong cold front will push through the waters sometime late on Monday with a round of strong to severe storms possible.

Gulf Stream
The approximate location of the west wall of the Gulf Stream as of Apr 09, 2020 at 1200 UTC...
- 64 nautical miles east of Flagler Beach.
- 75 nautical miles east of Saint Augustine Beach.
- 86 nautical miles east of Jacksonville Beach. 96 nautical miles east of St Simons Island.
Area Forecast Discussion
National Weather Service Jacksonville FL
149pm EDT Thu April 9 2020

Near Term - Through Tonight
High temperatures today will be in the lower 90s for much of the forecast area, with many sites expected to reach up to near or even breaking record high temperatures for the day. Scattered showers and storms are still anticipated later today as the cold air boundary continues moving southward, with the most likely developments occurring along and south of the I-10 corridor in the late afternoon and early evening. Overnight low temperatures will range from out the upper 50s in southeast Georgia and in the lower to mid 60s for much of northeast Florida.

.SHORT TERM [Friday Through Saturday]... Cooler conditions are anticipated for Friday as cool dry air settles in during the afternoon, with chances for scattered showers occurring prior to the boundary passage. Dry conditions will continue on into Saturday, with the area of high pressure moving off towards the northeast during the late evening hours. Max daily temperatures during this period will be in the lower 70s on Friday and in the upper 70s and lower 80s on Saturday. Overnight low temperatures will similarly rise from out of the 40s and lower 50s on Friday up into the upper 50s and lower 60s on Saturday.

.LONG TERM [Sunday Through Thursday]... During Sunday morning a warm front will reside pretty close to the Altamaha and Ocmulgee Rivers during the early morning with showers from U.S. Route 82 northward. Widely scattered to scattered convection will be possible near the Altamaha River as this region remains in the warm sector. Widely scattered convection will remain possible in the warm sector, mainly along the inland moving Gulf coast sea breeze boundary during the mid to late afternoon hours, where showers may be more numerous along the I-95 corridor with a convergence zone possibly developing along the merging east coast and GOM seabreeze. Max temps on Easter Sunday will soar between 90-92 for inland north central FL, with mid to upper 80s elsewhere. A cold front approaches the area from the northwest Sunday night into Monday bringing numerous showers and storms. The front moves into the area Monday and then stalls over northeast FL, with upper level disturbances streaming across the area in the upper SW flow allowing for continued scattered rain chances through midweek with the surface trough remaining in place. Temperatures will remain well above normal through at least Tuesday, with some cooling expected toward midweek as the frontal boundary slowly slips a tad southward as a northerly flow sets up.

Marine
Winds and seas will remain at or below 15 knots through Saturday. Winds then increase to near advisory levels Sunday and to advisory levels Sunday night as the pressure gradient increases ahead of the next system. A front then moves through the area Monday, bringing numerous showers and scattered storms and decreasing gradient winds. The front stalls across the area with rain chances continuing through midweek.

Fire Weather
High dispersion values over SE Georgia for today and tomorrow. Near record high temperatures today with winds becoming more calm in the late afternoon and evening. Min RH values can drop down to about 25-35 over SE Georgia tomorrow, however with the more mild winds on Friday, critical condition criteria is not expected. Potential for widespread rainfall for the end of the weekend and beginning of next week.

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