"Rainfall warning in effect for: Howe Sound - Heavy rain is expected.
An incredible series of storms are set to cross the BC Coast this week. An intense jet stream over the Pacific is gathering very warm moist air from southern latitudes. A subtropically-influenced airstream will bombard the mountains of Vancouver Island and the Lower Mainland from today through Thursday morning.
The first two storms will boost rainfall totals well above the warning criteria for a 24-hour period. Following systems will add to the week's rainfall and the initial warnings will likely be extended for successive 24-hour periods though mid-week. The inflooding warm air will drive the freezing level to nearly 2500 metres. In some areas, additional water from snow-melt will add even more water to drainage basins, creeks, and rivers.
The West Coast of Vancouver Island, Inland areas including Port Alberni and Howe Sound will absorb the brunt of the saturated airstream. Rainfall totals in the range of 100 to 200 millimetres are expected through Tuesday morning, And that will be just the beginning...
Heavy downpours are likely to cause flash floods and water pooling on roads. Don't approach washouts near rivers, creeks and culverts.
Rainfall Warnings are issued when significant rainfall is expected.
Environment Canada meteorologists will update alerts as required. Please monitor local media or Weatheradio. Email reports of severe weather to pacificstorm@ec.gc.ca or tweet with the hashtag #BCStorm."
A High Streamflow Advisory has been issued for the South Coast, including Howe Sound. Rivers are expected to rise in response rainfall overnight on Monday, with rapid rises in levels expected into late Tuesday. In areas where rainfall is the heaviest, it is likely that advisories will be upgraded to Flood Watch level. This includes the North Shore Mountains and Howe Sound and may extend to other areas. Read the full release.
December 8, 2014
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