Flash flooding possible for parts of Upper Midwest
A slow-moving weather system progressing from the northern Plains to the Great Lakes will bring excessive rainfall and a risk of flash flooding to portions of the Upper Midwest on Friday. The heaviest rainfall is expected from central Iowa northeastward across southeastern Minn. and into Wisc. Rainfall totals of 1-2 inches, with locally-higher amounts, are possible through Saturday morning.
Hazardous Weather Conditions
19NM SE The Elbow Light FL
Marine Point Forecast [NOTICE]
SEAS ARE GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE
HEIGHT OF THE HIGHEST 1/3 OF THE WAVES. INDIVIDUAL WAVES MAY BE
MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
- SynopsisTHE SUBTROPICAL RIDGE WILL EXPAND ACROSS THE FLORIDA
PENINSULA THIS AFTERNOON AND TONIGHT...RESULTING IN FRESH EASTERLY
BREEZES THROUGH SUNDAY NIGHT. BREEZES MAY START TO DECREASE ON
MONDAY AND MONDAY NIGHT.
THE APPROXIMATE SHOREWARD EDGE OF THE GULF STREAM AS OF AUGUST
23 NM S OF DRY TORTUGAS LIGHT...ON LOGGERHEAD KEY.
8 NM S OF COSGROVE SHOAL LIGHT...OFF THE MARQUESAS KEYS.
8 NM S OF SAND KEY LIGHT...OFF KEY WEST.
10 NM S OF LOOE KEY...OFF BIG PINE KEY.
15 NM S OF SOMBRERO KEY LIGHT...OFF MARATHON.
11 NM SE OF ALLIGATOR REEF LIGHT...OFF ISLAMORADA.
6 NM SE OF MOLASSES REEF LIGHT...OFF KEY LARGO.
1 NM E OF CARYSFORT REEF LIGHT...OFF OCEAN REEF.
GULF STREAM INFORMATION COURTESY OF THE NAVAL OCEANOGRAPHIC OFFICE.
- This Afternoon ESE wind 10 to 15 kt. Isolated showers. Seas around 3 ft.
- Tonight E wind 10 to 15 kt. Isolated showers, with thunderstorms also possible after 9pm. Seas 2 to 3 ft.
- Saturday E wind around 15 kt. Isolated showers and thunderstorms. Seas around 4 ft.
- Saturday Night E wind around 15 kt. Isolated showers and thunderstorms. Seas 3 to 4 ft.
- Sunday E wind around 15 kt. Isolated showers and thunderstorms. Seas around 3 ft.
- Sunday Night E wind 10 to 15 kt. Isolated showers and thunderstorms. Seas around 3 ft.
- Labor Day E wind around 10 kt. Scattered showers and thunderstorms, mainly after 9am. Seas 2 to 3 ft.
- Monday Night E wind around 10 kt. Scattered showers and thunderstorms. Seas around 2 ft.
- Tuesday E wind around 10 kt. Scattered showers and thunderstorms. Seas around 2 ft.
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.
HOURLY WEATHER GRAPH
NATIONAL DIGITAL FORECAST DATABASE