Southern U.S. Heavy Rain; Lake Effect Snow Redevelops

Locally heavy rain may bring a threat of flash, urban, and small stream flooding across the lower Mississippi Valley Thursday and Friday. A clipper crossing southern Canada will bring lake effect snow to the Great Lakes and light snow to the Northeast Thursday into Saturday morning.
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Jacksonville, FL Local Forecast Office

4NM S Saint Augustine Beach FL

Marine Point Forecast

[NOTICE]

Overnight

Light Wind
1ft
Low: 48 °F
Thursday

WSW 7kt
< 1ft
High: 71 °F
Thursday
Night
Light Wind
< 1ft
Low: 54 °F
Friday

WSW 8kt
< 1ft
High: 69 °F
Friday
Night
Light Wind
< 1ft
Low: 55 °F
Saturday

NNE 10kt
1ft
High: 64 °F
Saturday
Night
NNE 9kt
1-2ft
Low: 56 °F
Sunday

E 7kt
1-2ft
High: 68 °F
Sunday
Night
Light Wind
< 1ft
Low: 59 °F

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 10:15 pm EST Jan 20, 2021
Forecast Valid: 12am EST Jan 21, 2021-6pm EST Jan 27, 2021

View Nearby Observations

Detailed Forecast

Synopsis: A weak front will stall over the local waters tonight, then it will lift north as a warm front Thursday. This boundary will meander across south Georgia Thursday night through Friday as high pressure builds east of south Florida. The front will shift south across north Florida late Friday into early Saturday as high pressure builds northeast of the region. Onshore flow develops Saturday as a coastal trough forms over the adjacent Atlantic waters Sunday. The trough will lift north as a warm front Monday with increasing southerly flow over the local waters ahead of the next cold front early next week.

.GULF STREAM...

The approximate location of the west wall of the Gulf Stream as of Jan 20, 2021 at 1200 UTC...

51 nautical miles east of Flagler Beach. 63 nautical miles east of Saint Augustine Beach. 77 nautical miles east of Jacksonville Beach. 97 nautical miles east southeast of St Simons Island.

This data courtesy of the Naval Oceanographic Office.

Overnight

Variable winds 5 kt or less. Partly cloudy. Seas around 1 ft.

Thursday

Variable winds less than 5 kt becoming WSW 5 to 7 kt in the afternoon. Mostly sunny. Seas 1 ft or less.

Thursday Night

Variable winds 5 kt or less. Areas of fog after 4am. Seas 1 ft or less.

Friday

Variable winds less than 5 kt becoming WSW 5 to 8 kt in the morning. A chance of showers, mainly after 1pm. Areas of fog before 7am. Seas 1 ft or less.

Friday Night

Variable winds 5 kt or less. A slight chance of showers before 1am. Seas 1 ft or less.

Saturday

NNE wind 5 to 10 kt. A slight chance of showers. Seas around 1 ft.

Saturday Night

NNE wind 6 to 9 kt. A chance of showers. Seas 1 to 2 ft.

Sunday

E wind 5 to 7 kt. A slight chance of showers. Seas 1 to 2 ft.

Sunday Night

Variable winds 5 kt or less. Mostly cloudy. Seas 1 ft or less.

*Notices:

This forecast is for a single location. For safety concerns, mariners should be aware of the weather over a larger area. Forecast information for a larger area can be found within the zone forecast and the NDFD graphics.
The forecast conditions at a particular point may not exceed the criteria of a Small Craft Advisory, Gale, Storm etc. These watches/warnings/advisories are issued for the entire zone in which the point resides and mariners should act accordingly.