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B.C. Weather: Unusually cold spring a blessing for river forecasters, but June could bring trouble


Snowpack melting slowly and evenly as higher trough carry Arctic Air to B.C.

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A two-week chilly snap that has stored temperatures in B.C. between 5 and ten levels cooler than regular might result in minimal early spring flooding within the Fraser Basin, says a Weather Network meteorologist.

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However, if issues grow to be unusually heat in late May and early June the file snowpack within the Rockies and near-record within the Cariboo may imply bother.

Meteorologist Kevin McKay stated the weird and long-lasting chilly spell was as a consequence of an “upper trough” that was pulling chilly air down from the Arctic and would final one other week. He stated that on Thursday in Vancouver the temperature could not attain 10 levels, which is seven levels colder than regular.

The higher trough can be stopping hotter and wetter programs from the Pacific from transferring east into B.C.

“The last two weeks have been consistently below seasonal temperature-wise,” McKay stated.

“That is good news for flooding. Right now the alpine temperatures are going below freezing at night and a few degrees over during the day, when normally they would be above freezing and the snow would be melting. Any additional snowfall can be concerning if you are on the top end of the average snowpack, but this year in the South Coast the snow pack is below average.”

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This system is slowly transferring east, and when it will get into Alberta by the tip of this week, per week of conventional moist, hotter spring climate is predicted within the South Coast, McKay stated.

This will likely be adopted by hotter and nicer spring climate.

McKay stated this might be a priority if it will get too heat as a result of within the Cariboo — that feeds into the Fraser River — the snowpack is on the highest finish of the vary, whereas the Rockies — that feed into the Fraser and Columbia River basins — have a file snowpack in the mean time.

“Right now it’s a perfect situation to avoid the flooding, but it may be a case of postponing the inevitable if we go from a cold trend to every day being 25 degrees in the Interior and 20 in Vancouver,” he stated.

“We aren’t in the clear in terms of a flood threat, but if we do see it it, it will be after the May long weekend for sure and into June,” he stated.

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According to the B.C. River Forecast Centre, there aren’t any flood warnings or flood watches within the province.

There is a excessive streamflow advisory in impact for the Thompson River close to Spences Bridge, which was website of heavy flooding final November.

The centre’s subsequent Snow Survey and Water Supply Bulletin is due for launch on Tuesday.

The spring thaw is of explicit concern this 12 months after main wildfires, droughts and mudslides that altered the panorama and waterways throughout the south of B.C. in 2021.

dcarrigg@postmedia.com


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