A cold front brought gusty thunderstorms with locally heavy rainfall to parts of northeastern Argentina and Uruguay on Tuesday, and another front will bring a renewed threat for strong to severe storms Thursday into Thursday night.
The cities of Buenos Aires and Montevideo will again be in the path of these storms, which will be capable of producing damaging winds, locally heavy rainfall and hail.
Satellite image on Bing Maps showing thunderstorms that moved across northeastern Argentina and Uruguay on Tuesday morning.
A brief break from the stormy weather occurred on Wednesday as the first frontal boundary lifted north into Brazil promoting a cooler and dry day across the region.
The second frontal boundary will bring a new threat for strong to severe thunderstorms Thursday afternoon and evening for both Buenos Aires and Montevideo.
The second front will lift northward by Friday allowing a much cooler air mass to push into both cities through the weekend.
Meanwhile, the threat of heavy rain and gusty thunderstorms will shift into areas from Paraguay into southeastern Brazil for the weekend where flooding will be the primary concern.
A tropical threat from the Atlantic on the United States and Caribbean islands may increase into next week.
United States residents may pay higher heating costs this fall as colder air is expected to grip the Rockies and Plains at times and some quick-hitting chilly shots may impact the Northeast.
Rescue efforts are underway in Hiroshima, Japan, after several landslides buried people and caused severe damage on Wednesday morning, local time.
Monsoonal moisture from the tropics slammed the Phoenix area and other parts of the Southwest with heavy rainfall, causing flooding in the region.
A long-lived and intense thunderstorm dumped hail that ended up being measured in feet in some parts of Mexico City Sunday afternoon and evening.
A zone of thundery rain with the risk of flooding and travel delays will occur into the weekend from the northern Plains to the central Appalachians and part of the mid-Atlantic.
Salt Lake City, UT (1986)
Heavy rain in the Wasatch Mountains causes urban flooding. At least two feet of water covered the eastern part of the city.
Cutbank, MT (1992)
Temperature drops from 87 degrees to 49 degrees in 8 hours.
Houston, TX (1999)
105 degrees, new record for date.