There are no significant weather events being reporting in Niagara at this time.
Note that local snow accumulations may be significant.
When winds of 40 km/hr or greater are expected to cause widespread reductions in visibility to 400 metres or less, due to blowing snow, or blowing snow in combination with falling snow, for at least 4 hours
When blowing snow, caused by winds of at least 30 km/hr, is expected to reduce visibility to 800 metres or less for at least 3 hours
Issued when the temperature or wind chill is expected to reach minus 30 C (degress Celsius) for at least two hours
When 15 cm or more of snow falls within 12 hours or less
When, down wind of large bodies of water, like the Great Lakes, snow squalls are imminent or occurring with one or more of the following conditions being produced:
When significant ice is expected to form on roads, sidewalks, or other surfaces over much of a region because of the freezing of residual water from either melted snow, or falling/fallen rain due to a rapid drop in temperature
When freezing rain is expected to pose a hazard to transportation or property or when freezing rain is expected for at least 2 hours
When a period of freezing drizzle is expected for at least 8 hours
When severe and potentially dangerous winter weather conditions are expected, including: