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.
Read More...

For More Weather Information:

Jacksonville, FL Local Forecast Office

4NM S Saint Augustine Beach FL

Marine Point Forecast

[NOTICE]
  • Overnight

    Partly Cloudy

    Light Wind
    1ft

    Low: 48 °F

  • Thursday

    Mostly Sunny

    Winds IncreasingWSW 7kt
    < 1ft

    High: 71 °F

  • Thursday
    Night

    Areas Fog

    Light Wind
    < 1ft

    Low: 54 °F

  • Friday

    Chance Showers

    Winds IncreasingWSW 8kt
    < 1ft

    High: 69 °F

  • Friday
    Night

    Slight Chc Showers

    Light Wind
    < 1ft

    Low: 55 °F

  • Saturday

    Slight Chc Showers

    NNE 10kt
    1ft

    High: 64 °F

  • Saturday
    Night

    Chance Showers

    NNE 9kt
    1-2ft

    Low: 56 °F

  • Sunday

    Slight Chc Showers

    E 7kt
    1-2ft

    High: 68 °F

  • Sunday
    Night

    Mostly Cloudy

    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:

  1. 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.
  2. 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.
  Select Another Point

ABOUT THIS FORECAST

Point Forecast: 29.76°N 81.27°W
Last Update: 10:15 pm EST Jan 20, 2021
Forecast Valid: 12am EST Jan 21, 2021-6pm EST Jan 27, 2021
  Forecast Discussion
  Get as KML Get as XML

RADAR & SATELLITE IMAGES

Link to Local Radar Data Link to Satellite Data