Heavy rain and flash flooding possible in portions of the Southwest this weekend

An upper-level low in the Southwest U.S. will act as a trigger for thunderstorms this weekend. The area of greatest concern is in New Mexico, southeast Utah and portions of southern Colorado. Storms will be slow moving and could bring several rounds of rain to the same areas. Rainfall amounts may exceed 3 inches in localized areas. Flash Flood Watches are in effect.
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Hazardous Weather Conditions

Last Update: 1019 AM EDT Sun Aug 20 2017

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Miami - South Florida Local Forecast Office

3NM WNW Marco Island FL

Marine Zone Forecast


Synopsis: Moderate east-southeast winds will continue over the local waters through the day, becoming fresh tonight and Monday with a moderate chop and seas up to 4 feet. A tropical wave moving over the region today, bringing scattered to numerous showers and thunderstorms. After a break in the rain Monday, another tropical wave will bring scattered to numerous showers and thunderstorms Tuesday into Wednesday. Winds and seas may be locally higher near thunderstorms.

.GULF STREAM HAZARDS...East-southeast winds increasing to 15 to 20 knots late tonight.

The approximate location of the west wall of the Gulf Stream as of Aug 19, 2017 at 1200 UTC...

9 nautical miles east southeast of Fowey Rocks. 15 nautical miles east southeast of Port Everglades. 11 nautical miles east northeast of Lake Worth. 12 nautical miles east of Jupiter Inlet.

This data courtesy of the Naval Oceanographic Office.

Rest Of Today
East winds 5 to 10 knots nearshore and east 10 to 15 knots offshore. Seas around 2 feet. Period 3 seconds. Bay and inland waters a light chop. Showers likely and a chance of thunderstorms.
Tonight
East winds 10 to 15 knots. Seas less than 2 feet nearshore and 2 to 3 feet offshore. Period 3 seconds. Bay and inland waters a light chop. A chance of showers and a slight chance of thunderstorms late in the evening.
Monday
East southeast winds 5 to 10 knots nearshore and east 10 to 15 knots offshore. Seas less than 2 feet nearshore and 2 to 3 feet offshore. Period 3 seconds. Bay and inland waters light chop. A slight chance of showers and thunderstorms.
Monday Night
East northeast winds 10 to 15 knots nearshore and east 15 to 20 knots offshore. Seas less than 2 feet nearshore and 2 to 3 feet offshore. Period 3 seconds. Bay and inland waters a moderate chop. A slight chance of showers and thunderstorms.
Tuesday
East winds 5 to 10 knots. Seas around 2 feet. Bay and inland waters a light chop. A chance of showers in the morning. A chance of thunderstorms. Showers likely.
Tuesday Night
East southeast winds 5 to 10 knots. Seas less than 2 feet. Bay and inland waters a light chop. A chance of showers and thunderstorms.
Wednesday
Southeast winds 5 to 10 knots. Seas less than 2 feet. Bay and inland waters a light chop. Showers and thunderstorms likely.
Wednesday Night
Southeast winds 5 to 10 knots. Seas less than 2 feet. Bay and inland waters a light chop. A chance of showers and thunderstorms.
Thursday
South winds 5 to 10 knots. Seas around 2 feet. Bay and inland waters a light chop. Showers and thunderstorms likely.
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ABOUT THIS FORECAST

Last Update: 1019 AM EDT Sun Aug 20 2017
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