Snowstorm synopsis. A strong NW jet will intensify a surface low late Tuesday into Wednesday AM. Not a typical weak inside slider low as pressure deepens to ~985 hPa on approach to N. Vancouver Island. Periods of snow intensify across VI later Tuesday afternoon, with mostly dry conditions across the Lower Mainland. There's a chance the snow is fashionably late.

To find the direct link between climate change & an extreme event is a frivolous one. The Fraser Valley is a flood-prone region, as floods have occurred in the past. This one carved a unique path deep into the Fraser Canyon, the worst place for a stalling atmospheric river. (1/7) The catastrophic atmospheric river had deep tropical roots. That is where sea-surface temperatures are well above average. A warmer atmosphere and warmer sea surface temperature can hold more water vapour, making climate change a culprit here. (2/7)

CURRENT HEAT WAVE & CLIMATE CHANGE 101

Climate change has its fingerprints all over this unprecedented heat event. The extremes of the atmosphere are being re-written before our very eyes this weekend and beyond. (1/7) Climate change increases the frequency and intensity of heat waves. An easy way to think about it is that the temperatures in this current heatwave are a couple of degrees higher because of anthropogenic climate change. (2/7)

Absolutely absurd temperatures forecast, afraid some all-time temperature records are in jeopardy in British Columbia and Pacific Northwest. City emergency management officials: time to enact the extreme heat procedures and plans. Cooling centres, check on vulnerable etc. #BCHeat This part of the world isn’t accustomed to these temperatures: take Abbotsford as an example, perhaps 3 consecutive days at or above all-time readings.