Wintry Conditions from the Northern Rockies to Upper Midwest; Critical Fire Weather Across the West

Snow and ice will continue to impact portions of the Northern Rockies, Northern Plains, and Upper Midwest. Father south, heavy rainfall and a few severe thunderstorms are possible over the Middle Mississippi Valley. Another system will bring heavy precipitation to the Pacific Northwest Friday, while critical fire weather conditions prevail over California, the Southern Rockies, and High Plains.
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Last Update: 1011 AM EDT Thu Oct 22 2020

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Miami - South Florida Local Forecast Office

11NM ESE South Palm Beach FL

Marine Zone Forecast


...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING...
Synopsis: High pressure over the Southeast United States continues to dominate the weather pattern with abundant moisture across the area. A trough of low pressure in the western Caribbean will move northeastward this weekend with moisture remaining across the region.

.GULF STREAM HAZARDS...Seas of 4 to 6 feet. Gusty winds, lightning, and waterspouts possible.

The approximate location of the west wall of the Gulf Stream as of Oct 22, 2020 at 1200 UTC...

7 nautical miles east southeast of Fowey Rocks. 12 nautical miles east southeast of Port Everglades. 11 nautical miles east northeast of Lake Worth. 17 nautical miles east northeast of Jupiter Inlet.

This data courtesy of the Naval Oceanographic Office.

Rest Of Today
East winds 15 to 20 knots. Seas 2 to 4 feet with occasional seas to 5 feet. Period 5 seconds. Intracoastal waters choppy in exposed areas. Scattered showers and slight chance of thunderstorms.
Tonight
East winds around 15 knots with gusts to around 20 knots. Seas 2 to 4 feet with occasional seas to 5 feet. Period 5 seconds. Intracoastal waters a moderate chop. Scattered showers.
Friday
East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas to 6 feet. Period 4 seconds. East northeast swell 3 feet. Intracoastal waters a moderate chop. Scattered showers. Scattered thunderstorms.
Friday Night
East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas to 6 feet. Period 4 seconds. East northeast swell 3 feet. Intracoastal waters a moderate chop. Scattered showers and thunderstorms.
Saturday
East winds around 10 knots. Seas 2 to 4 feet with occasional seas to 5 feet. Intracoastal waters a light chop. Scattered showers and thunderstorms.
Saturday Night
East southeast winds around 10 knots. In the gulf stream, gusts up to 20 knots late in the evening. Seas 2 to 4 feet with occasional seas to 5 feet. Intracoastal waters a light chop. Numerous showers and thunderstorms.
Sunday
East northeast winds around 10 knots. Seas 3 to 5 feet with occasional seas to 6 feet. East northeast swell 3 feet. Intracoastal waters a light chop. Numerous showers and chance of thunderstorms.
Sunday Night
East northeast winds 5 to 10 knots. Seas 3 to 5 feet with occasional seas to 6 feet. East northeast swell 3 feet. Intracoastal waters a light chop. Scattered showers and chance of thunderstorms late in the evening, then slight chance of thunderstorms and isolated showers after midnight.
Monday
East northeast winds 5 to 10 knots. Seas 3 to 5 feet with occasional seas to 6 feet. North northeast swell 3 feet. Intracoastal waters a light chop. Slight chance of thunderstorms and isolated showers.
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Last Update: 1011 AM EDT Thu Oct 22 2020
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