Scorching Heat West and South-Central; Monsoon Threats; Areas of Heavy Rain

Excessive heat continues in the West and South-Central U.S. Temperatures heat up in the west next week with 90s and 100s north to as high as 127 in the desert. Monsoon flow also continues with threats of flash floods, dust storms, and dry thunderstorms. A low system may produce excessive rain to portions of the Middle Atlantic. Areas of heavy rain from the Gulf to the Great Lakes.
Read More...

Hazardous Weather Conditions

Last Update: 433 PM EDT Sat Jul 21 2018

View Nearby Observations

For More Weather Information:

Key West, FL Local Forecast Office

3NM N American Shoal Light FL

Marine Zone Forecast


Synopsis: A weak pressure pattern will prevail this afternoon and tonight. A broad and weak area of low pressure will develop over the Southeastern United States Sunday and Sunday night, then slide southwest into the northeastern Gulf of Mexico Monday and Monday night. This area of low pressure will recede to the north Wednesday and Wednesday night.

The Approximate Shoreward Edge of the Gulf Stream current, as of July 21st.

30 NM South of Dry Tortugas Light...on Loggerhead Key. 1 NM South of Cosgrove Shoal Light...off the Marquesas Keys. 10 NM South of Sand Key Light...off Key West. 18 NM South of Looe Key...off Big Pine Key. 21 NM South of Sombrero Key Light...off Marathon. 10 NM Southeast of Alligator Reef Light...off Islamorada. 5 NM Southeast of Molasses Reef Light...off Key Largo. 5 NM East of Carysfort Reef Light...off Ocean Reef.

Gulf Stream Information Courtesy of the Naval Oceanographic Office.

Tonight
Southwest to west winds near 10 knots this evening, decreasing to 5 to 10 knots. Seas 1 to 2 feet, subsiding to around 1 foot. Nearshore waters a light chop, becoming smooth to a light chop. Isolated showers and thunderstorms.
Sunday
West winds near 10 knots, increasing to 10 to 15 knots in the afternoon. Seas around 1 foot, building to 1 to 2 feet. nearshore waters a light chop, becoming a light to moderate chop. Isolated showers and thunderstorms.
Sunday Night
West winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a light to moderate chop. Scattered showers and thunderstorms.
Monday
Southwest to west winds near 10 knots. Seas 1 to 2 feet. nearshore waters a light chop. Scattered showers and thunderstorms.
Monday Night And Tuesday
Southwest winds near 10 knots. Seas 1 to 2 feet. Nearshore waters a light chop. Scattered showers and thunderstorms.
Tuesday Night And Wednesday
South to southwest winds 5 to 10 knots. seas around 1 foot. Nearshore waters smooth to a light chop. scattered showers and thunderstorms.
Wednesday Night
South winds 5 to 10 knots becoming southeast after midnight. Seas around 1 foot. Nearshore waters smooth to a light chop. Scattered showers and thunderstorms.
Thursday
Southeast winds 5 to 10 knots. Seas around 1 foot. nearshore waters smooth to a light chop. Scattered showers and thunderstorms.
Thursday Night
Southeast winds near 10 knots. Seas 1 to 2 feet. nearshore waters a light chop. Scattered showers and thunderstorms.
  Click Map For Detailed Forecast

ABOUT THIS FORECAST

Last Update: 433 PM EDT Sat Jul 21 2018
  Forecast Discussion
   

RADAR & SATELLITE IMAGES

Link to Local Radar Data Link to Satellite Data