Global News Calgary posted this video of a storm on Tuesday, Aug. 14, in Calgary, Canada.
The reported winds sustained as high as 41 mph and gusting to as high as 60 mph north-northwest. The thunderstorm was between 2:45 and 4:00 p.m. local time at Calgary International and Calgary/Springbank Airport.
"Jay Mangat shot this amazing footage as a sign on Deerfoot approaching 32nd Ave in the NE of Calgary was being blown around. At the end of the video, one of the signs fall off due to the violent shaking."
Showers and thunderstorms will return to the Southwest late this week and could reach part of California.
A cold front swinging into the Northeast will bring the threat of severe weather to part of the region on Tuesday afternoon.
The southwest Gulf of Mexico has given birth to the Atlantic basin's fourth tropical storm of the season and will send torrential rain into northern Mexico.
Flooding is a concern across southwest Mexico through midweek as Norbert moves just offshore.
The Alaskan wood frog, which freezes itself during the harsh winter months, can remain in an extreme frozen state far longer than researchers originally thought.
An area of low pressure will bring a threat of heavy rain and flooding to parts of southern Europe through the middle of the week.
Mecca, CA (1950)
126 degrees - highest ever for U.S. in Sept.
East Coast (1775)
Matecumbe Key, FL (1935)
Labor Day Hurricane hit Florida. Pressure at Matecumbe Key dipped to 26.35"/892.3 mb. Most intense hurricane ever to hit the U.S. with 200-mph wind. Tide of 15 feet; 408 dead.