A rare Rex Block weather pattern is set to move into Alberta this weekend, bringing heavy rain and strong winds that could cause localized flooding and power outages. The unusual meteorological event, characterized by a high-pressure system sitting directly above a low-pressure system, will stall over the region, prolonging the adverse conditions.
What is a Rex Block?
According to Environment Canada, a Rex Block occurs when a high-pressure system blocks the eastward movement of a low-pressure system, causing the low to remain stationary. This setup often leads to prolonged periods of rain, wind, and unstable weather. The phenomenon is rare in Alberta, making this weekend's event particularly noteworthy.
Expected Impacts
The heavy rain is expected to begin late Friday and continue through Sunday, with accumulations of 50 to 80 millimeters in some areas. Strong winds, gusting up to 70 km/h, are also forecast, which could down trees and cause power outages. The combination of rain and wind may lead to hazardous driving conditions and localized flooding in low-lying areas.
"Residents should prepare for potential flooding and be cautious when traveling," said a meteorologist from Environment Canada. "The Rex Block is a stubborn weather pattern, and we expect conditions to persist through the weekend."
Precautions and Advisories
Environment Canada has issued rainfall warnings for several regions, including Calgary and Edmonton. Officials advise clearing storm drains and securing loose outdoor objects. Drivers are urged to reduce speed and avoid flooded roads. The province's emergency management agency is monitoring the situation and ready to respond if needed.
