Please choose your default site



Barrie - Collingwood - Hillsdale

Alerts in Effect

Severe Thunderstorm Watch

Issued at 14:44 Sunday 02 August 2015

A significant, widespread severe weather situation is likely this afternoon and extending well into this evening. A few clusters of strong to severe thunderstorms continue to affect parts of the Bruce Peninsula. Conditions will become increasingly favourable for the development of even stronger thunderstorms across Southwestern Ontario from regions east of Lake Huron and eventually farther south. Severe thunderstorms over eastern Lower Michigan are expected to become more organized, and will be capable of producing very strong wind gusts, large hail and heavy rain as they move into southwestern Ontario this afternoon. This watch will likely be extended southwards and eastwards throughout the afternoon as this dynamic thunderstorm situation continues to develop. Very strong wind gusts can damage buildings, down trees and blow large vehicles off the road. Remember, severe thunderstorms can produce tornadoes. Be prepared for severe weather. Take cover immediately, if threatening weather approaches. Stay indoors when a thunderstorm strikes. There isn't a place outside that is safe during a thunderstorm. Stay away from all windows, skylights and doors. The Office of the Fire Marshal and Emergency Management recommends that you take cover immediately, if threatening weather approaches. Environment Canada meteorologists will update alerts as required. Please monitor local media or Weatheradio. To report severe weather, send an email to or tweet reports to #ONStorm. For more information:


Track the Storm

  • Beta
  • Tools

Full Screen

Open Map
No Delays
Minor Delays
Major Delays
Time Period:
Offshore Point
Not Available

Bare or Wet
Partly Covered

No Data
Click on a highway to view the forecast along the route:
Zoom in to see individual cameras
Click to view traffic
Alert in effect for this region
Current conditions at this location
Time Period:
LegendMap controlsSelect a highway
Interstate highway
State highway
Rain Rain
Ice Ice Snow Snow
Environment Canada
No Data
1 strike
Multiple strikes

    Active Weather Viewer Videos

    Move Collapse
    Default saved

    Search Location


    Look up Canadian postal code or US zip code