After receiving more than 6 inches yesterday, parts of the Miami Metro area will again be subject to flooding later Sunday.
One of the first cold fronts to reach South Florida all season will collide with deep tropical moisture. The result will be heavy rain-producing thunderstorms. The heaviest rainfall will likely be across the heavily populated portions of Miami-Dade and Broward counties.
Thunderstorms usually set up just west of the populated areas, across the Everglades. However, the approaching cold front will cause the Atlantic sea breeze to be pinned at the coast, over the populated areas. The sea breeze will collide with westerly winds associated with the cold front to form the thunderstorms.
There is so much moisture in the atmosphere, any thunderstorms that form will be capable of producing 2-4 inches of rain in just an hour.
Heavy rainfall belted the Miami area yesterday. The National Weather Service on the campus of Florida International University received over 6 inches of rain Saturday. Miami International Airport, the official observation site for the city, received 3.70 inches Saturday.
Any rainfall Sunday will fall on saturated ground. So, the threat for flooding under any thunderstorms will be high
Sunday will be the last day of heavy rainfall for Miami. The cold front will try to move through South Florida. But, there will only be a slight drop in humidity. Residents farther north in the state will enjoy a significant drop in humidity.
A new tropical threat may loom for the Caribbean and North America in the not-too-distant future, while eight more weeks remain in the Atlantic hurricane season.
The greatest danger of flooding across the central United States will unfold in western Texas, where downpours will be most persistent into Monday.
Fall air has finally arrived in the northeastern United States and may yield the first frost of the season in parts of the region this weekend.
Typhoon Megi will continue to strengthen before threatening lives and property across Taiwan and eastern China this week.
The first windstorm of the season could blast the northern United Kingdom around Tuesday of this coming week as Karl arrives.
Hot, dry and windy weather into Monday will lead to an increased risk of wildfires across Southern California.
SC, GA & N FL (1888)
Southern frost, earliest frost ever so far south.
Yellowstone, MT (1926)
Minus 9 degrees F., lowest for U.S. in September. Severe widespread frost with great crop destruction. Earliest snow in Spokane Co., Washington.
Luzon, Philippines Islands (750 miles east of (1958)
Lowest pressure recorded on earth...877.0 mb or 25.90".