Farmzone: Waterloo, Ontario change_»

Conditions are favourable for the development of severe thunderstorms that may be capable of producing strong wind gusts, large hail and heavy rain. Severe thunderstorms are possible late this afternoon as a cold front moves through from the northwest. The main threats are damaging wind gusts of 100 km/h and torrential downpours giving 25 to 50 mm of rain in under an hour. Thunderstorms will end this evening as considerably cooler and less humid air arrives in the wake of the cold front. ### Large hail can damage property and cause injury. Strong wind gusts can toss loose objects, damage weak buildings, break branches off trees and overturn large vehicles. Intense lightning is likely with any thunderstorm that develops. Remember, severe thunderstorms can produce tornadoes. Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@canada.ca or tweet reports using #ONStorm. For more information: http://www.emergencymanagementontario.ca/english/beprepared/beprepared.html.

Hot and humid conditions coming to an end this evening. The tropical air mass continues to hang on to Southern Ontario late this afternoon, with temperatures in the upper twenties to low thirties and widespread humidex values of 35 to 40. A cold front will move through the region this evening, with considerably cooler and less humid air being ushered in by northwesterly winds in the wake of the front. ### Extreme heat affects everyone. The risks are greater for young children, pregnant women, older adults, people with chronic illnesses and people working or exercising outdoors. Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@canada.ca or tweet reports using #ONStorm.