Marine Weather Net

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


REST OF TODAY

NNW
WINDS
15 - 20
KNOTS

TONIGHT

NW
WINDS
20 - 25
KNOTS

SATURDAY

NW
WINDS
20 - 25
KNOTS

SATURDAY NIGHT

NW
WINDS
20 - 25
KNOTS

The Marine Weather Forecast In Detail:
AMZ452 Forecast Issued: 934 AM EST Fri Nov 15 2019

SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY AFTERNOON
Rest Of Today...North Northwest Winds 15 To 20 Knots. Seas 5 To 7 Feet With Occasional Seas Up To 9 Feet. Dominant Period 6 Seconds. Inland Waters Choppy. Showers And A Slight Chance Of Thunderstorms.
Tonight...North Northwest Winds 20 To 25 Knots. Seas 6 To 8 Feet With Occasional Seas Up To 10 Feet. Dominant Period 6 Seconds. Inland Waters Choppy. Showers.
Saturday...North Northwest Winds 20 To 25 Knots With Gusts To Around 35 Knots. Seas 6 To 9 Feet With Occasional Seas Up To 11 Feet. Dominant Period 7 Seconds. Inland Waters Rough. A Chance Of Showers.
Saturday Night...North Northwest Winds 20 To 25 Knots With Gusts To Around 35 Knots. Seas 6 To 9 Feet With Occasional Seas Up To 11 Feet. Dominant Period 8 Seconds. Inland Waters Rough. A Slight Chance Of Showers.
Sunday...North Northwest Winds 20 To 25 Knots. Seas 6 To 9 Feet With Occasional Seas Up To 11 Feet Subsiding To 5 To 7 Feet With Occasional Seas Up To 9 Feet In The Afternoon. Dominant Period 7 Seconds Increasing To 12 Seconds In The Afternoon. Inland Waters Choppy.
Sunday Night...Northwest Winds 10 To 15 Knots. Seas 5 To 7 Feet With Occasional Seas Up To 9 Feet.
Monday...Northwest Winds 5 To 10 Knots Becoming West Southwest In The Afternoon. Seas 4 To 6 Feet With Occasional Seas Up To 8 Feet.
Monday Night And Tuesday...West Northwest Winds 5 To 10 Knots. Seas 3 To 5 Feet With Occasional Seas Up To 6 Feet. A Slight Chance Of.
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AMZ400: Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm
934 AM EST Fri Nov 15 2019

An area of low pressure over the Atlantic coastal waters will move east-northeast today increasing north to northwest winds. The low pressure system will slowly move east northeast during the weekend off the South and North Carolina coasts, bringing strong northerly winds and building seas to our waters through the weekend.

Gulf Stream
The approximate location of the west wall of the Gulf Stream as of Nov 14, 2019 at 1200 UTC...
- 53 nautical miles east northeast of Flagler Beach.
- 48 nautical miles east of Saint Augustine Beach.
- 53 nautical miles east of Jacksonville Beach.
- 71 nautical miles east southeast of St Simons Island.
Area Forecast Discussion
National Weather Service Jacksonville FL
1014am EST Fri Nov 15 2019

Strong forcing associated with shortwave trough has moved out of the area taking moderate to heavy rainfall eastward early this morning. A strong mid / upper level low over AL/MS area pivots east- southeast through this evening which will enhance precipitation again starting out over the west and northwest zones this afternoon and continue into tonight. Precip won't be as heavy as it was last night and early this morning but amounts of 0.5 to 1 inch possible over parts of southeast GA, with lesser amounts elsewhere. Otherwise, cloudy, cool and a chance of rain rest of today with temps in the 50s over southeast GA and parts of upper Suwannee Valley and then 60s to near 70 for rest of northeast FL. Additional small adjustments to temps may be required this morning to lower max temps than a bit.

Marine
Winds and seas have come up and SCA (Small Craft Advisory) is in effect. Seas at local buoys about 7 feet so moved up timing of SCA (Small Craft Advisory) for the nearshore waters. Rest of the forecast on track.

Near Term
Today through Tonight...Widespread rain continues to spread east across the area early this morning. Areas of moderate to heavy rain has produced isolated rainfall amounts of 2-4 inches over parts of Suwannee...Columbia...and Baker counties in ne Fl. Rain will become more scattered by late morning as surface low pressure in the eastern Gulf moves ne to off the northeast Florida coast. Temperatures will be cool today as clouds and rain keep readings below normal. Mid- upper low lags back to the west and will move over the area tonight which will continue the chance for rain overnight mainly from the I-10 corridor northward across se Ga.

Short Term
SAT THROUGH MON...Cloudy and cool with areas of showers and drizzle Sat morning as strong upper level low presses east across south GA/N FL, deepening a surface low offshore of the GA/Carolina Atlantic coast. Strong, blustery north winds will gust near 25-35 mph at times along the local Atlantic coast and attached inland estuaries in response to the deepening surface low offshore. Winds will gradually decrease as low cloud bases rise into Sat afternoon as the pressure system becomes vertically stacked/phased offshore and tracks ENE Sat night away from the local area. Rain chances tapper off west to east Sat afternoon with dry conditions expected Sat night through Monday as a brief mid level ridge builds in from the west and a weak surface ridge dominates WNW of the local area.

A cool, dry NNW drainage flow will continue below normal temperatures. Low temperatures will range from the upper 30s to low 40s inland but do not expect significant frost formation Sat night or Sunday night as radiational cooling conditions will not be ideal due to lingering clouds low Sat night with elevated surface winds then passing high clouds Sunday night. High temperatures will range in the mid/upper 50s across SE GA to the low/mid 60s across NE FL...about 10-15 deg below climo values.

Long Term
TUE THROUGH FRI...A low chance of showers returns Monday night into Tuesday as the last long wave trough and surface front cross the the SE region. Pattern transitions Wed-Thu with dry conditions and moderating temperatures as stacked high pressure builds over the SE region, then builds east of the FL peninsula into Fri. Cool, below normal temperatures continue Tuesday & Wednesday with high temperatures generally in the 60s to near 70 with low temperatures in the 40s inland/50s coast. Temps moderate back toward climo values Thu & Fri as upper ridge breaks down and flow becomes more zonal aloft as low level winds become southerly.

Marine
Seas will remain elevated for the offshore waters so will continue Advisory for today. Low pressure will develop off the northeast Florida coast today...then slowly move ne and intensify off the Carolina coast through the weekend. Advisory conditions expected to include the near shore waters tonight through the weekend as pressure gradient tightens with slow moving deepening low. Gale force gusts will be possible offshore. Winds will drop off on Monday but seas will stay elevated.

NOAA Jacksonville FL Office: Watches - Warnings - Advisories
FL...Coastal Flood Advisory until 4am EST Saturday for Clay-Coastal Duval-Coastal Flagler-Coastal Nassau-Coastal St. Johns- Inland Duval-Inland Flagler-Inland Nassau-Inland St. Johns- Putnam.

GA...None. AM...Small Craft Advisory until 5am EST Monday 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 midnight tonight to 4pm EST Sunday 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.