Severe thunderstorm watch Ended

As of 10:23 PM EDT Thursday 21 July 2011, Environment Canada cancelled the Severe thunderstorm watch for
North Bay - Powassan - Mattawa and West Nipissing - French River areas.

*****

As of 3:31 PM EDT Thursday 21 July 2011, Environment Canada issued the following Severe thunderstorm watch for
North Bay - Powassan - Mattawa and West Nipissing - French River areas.

********************

High heat and humidity warning.

A hot and humid tropical air mass will cause the mercury to soar into the low to mid thirties today over the above regions. As a result humidex values will be into the low forties by this afternoon.

A weak cold front will sweep through Northeastern Ontario by this evening with a considerably less humid air mass expected to bring relief from the high humidex values on Friday.

During times of high heat and humidity, it is critical to stay properly hydrated by drinking Plenty of fluid like water or juice. Strenuous outdoor activities should be scheduled during the early morning or evening hours. Wear loose fitting, light weight clothing and spend as much time as possible in air conditioned places. Stay out of the sun and never leave elderly, children or pets unattended in a car.

Weather conditions are favourable for the development of severe thunderstorms until 6:00 PM EDT. The main threats are damaging winds, large hail and torrential downpours.

This is an alert to the potential development of severe thunderstorms with large hail, damaging winds or heavy rainfall..Monitor weather conditions and listen for updated bulletins.

********************