Severe Thunderstorms over the Plains, Heavy Rain Threat Continues over Portions of the Mississippi Valley

Heavy rainfall with localized flooding will remain possible over portions of the Mississippi Valley and the Plains through midweek. In addition, severe thunderstorms will be possible over the southern and central Plains. Some of the storms could contain damaging winds and large hail.
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Hazardous Weather Conditions

Last Update: 306 AM EDT Thu Aug 17 2017

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Miami - South Florida Local Forecast Office

4NM WSW Marco Island FL

Marine Zone Forecast


Synopsis: High pressure over the region will keep light to moderate east to southeast flow over the coastal waters, as well as the slight chance for showers and thunderstorms. An upper level low pressure system approaching from the east will bring a higher chance for thunderstorm activity Saturday into Sunday. Seas are forecast to run less than 2 feet until the weekend, then slowly build to 2 to 4 feet, under a strengthening easterly wind.

.GULF STREAM HAZARDS...none.

THE APPROXIMATE LOCATION OF THE WEST WALL OF THE GULF STREAM AS OF AUG 17, 2017 AT 1200 UTC...

7 NAUTICAL MILES EAST OF FOWEY ROCKS. 11 NAUTICAL MILES EAST OF PORT EVERGLADES. 11 NAUTICAL MILES EAST SOUTHEAST OF LAKE WORTH. 14 NAUTICAL MILES EAST NORTHEAST OF JUPITER INLET.

THIS DATA COURTESY OF THE NAVAL OCEANOGRAPHIC OFFICE.

Today
East winds 5 to 10 knots becoming west southwest in the afternoon. Seas less than 2 feet. Dominant period 2 seconds. Bay and inland waters a light chop. A slight chance of showers and thunderstorms in the morning,...then a chance of showers and thunderstorms in the afternoon.
Tonight
North northeast winds 5 to 10 knots becoming east after midnight. Seas less than 2 feet. Dominant period 2 seconds. Bay and inland waters a light chop. A chance of showers and thunderstorms.
Friday
Southeast winds 5 to 10 knots becoming south southwest in the afternoon. Seas less than 2 feet. Dominant period 3 seconds. Bay and inland waters a light chop. A chance of showers and thunderstorms.
Friday Night
East winds 5 to 10 knots. Seas less than 2 feet. Dominant period 2 seconds. Bay and inland waters a light chop. A slight chance of showers and thunderstorms through the night.
Saturday
East winds 5 to 10 knots nearshore and northeast 10 to 15 knots offshore. Seas less than 2 feet. Bay and inland waters a light chop. Showers and thunderstorms likely.
Saturday Night And Sunday
East southeast winds 5 to 10 knots nearshore and east southeast 10 to 15 knots offshore. Seas around 2 feet. Bay and inland waters a light chop. Showers and thunderstorms likely.
Sunday Night And Monday
East winds 10 to 15 knots. Seas less than 2 feet nearshore and 2 to 3 feet offshore. Bay and inland waters a light chop. A chance of showers and thunderstorms.
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ABOUT THIS FORECAST

Last Update: 306 AM EDT Thu Aug 17 2017
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