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Although July is usually quite dry in BC, the start of the month will be a reversal of this trend. In fact, some areas could end up seeing a month of rain earlier this week, thanks to a moisture-laden system that also carries the risk of storms in the province on Sunday. Some of them could be serious in parts of the Interior. Learn more about the weather and what to expect below.
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A stranded top-level pattern is to blame for the next stretch of rainy conditions.
We are seeing a rex blog in western Canada this weekend. This higher-level blocking pattern occurs when a lower-level blocking pattern is trapped below a higher-level ridge, basically blocking the jet stream and forcing a stagnant pattern to remain in place for days, and even all weeks in extreme cases.
While the Arctic Circle communities endure an impressive stretch of abnormal heat as a result of this stubborn ridge, BC will fall on the unstable side of the blocking pattern with this upper level stuck in the region.
This pattern is responsible for the impending stretch of rain that will begin dragging the south coast and the Lower Mainland from Sunday and will last until Tuesday. BC should expect heavy showers and storms to parade through the province during the first half of the week.
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A steady, shady rain will begin to build up in the region during the day on Sunday, which will probably be the day of heaviest rainfall as we head to the start of the new work week.
In total, precipitation will amount to 30-50 mm for much of the region, with possible isolated pockets of more than 50 mm, especially in parts of the interior. This may not seem like much, but since July is usually quite dry, this is almost a month of rain for some places on July 6th.
On Sunday, there will be a risk of severe storms in parts of the interior, with widespread and low-potential possibilities for much of the southern and central half of AC, including the Lower Mainland. However, there is a risk of stronger storm dynamics for the latter.
Several watersheds are experiencing high flows due to the wide runoff of snowmelt, and heavy rain showers are about to cause additional flood risks during the first week of July.
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Rain will begin to come out of southern BC on Tuesday, leaving behind the possibility of scattered showers and storms for the rest of the week.
We will escape any summer heat throughout British Columbia as we move forward during the first week of the month. Temperatures are expected to be around or slightly below seasonal levels for the next seven days, with highs hovering around 20 ° C during the duration in Vancouver.
Check back for the latest details on the rain towards British Columbia.