- Issued at
- 04:00 PDT/PST
- Created by
- Snowalters Equivalent
Summer refuses to leave BC just yet
Normally there is a shift in the weather pattern in the latter part of September that ushers in cooler and wetter conditions over BC. Not this year however! A brief break in the sunny conditions yesterday and today will end by Friday morning with sunny and warm conditions returning to the province and persisting into next week. Daytime temperatures are expected to be much above seasonal norms.
A weak trough over central and southern BC will shift eastward allowing a ridge to build onto the coast this afternoon. Mostly cloudy skies over BC this morning will see clearing this afternoon as a ridge of high pressure builds over the western sections of the province. Dry conditions are expected over most regions today except for scattered showers over the northwest interior and regions near the Rockies. Isolated non-severe thunderstorms are also possible over parts of the eastern interior this afternoon. On Friday, a ridge of high pressure will strengthen over BC giving sunny and weather to most parts of the province.
The Yukon will see mostly cloudy skies and mild temperatures today as a southwesterly flow persists over the region. Scattered showers are expected over the southeastern Yukon with increasing showers developing tonight into Friday morning. The southwest Yukon, to the west of Whitehorse, should remain dry as the region lies in the subsidence zone to the lee of the St. Elias range.
The 500 mb animation depicted above shows an upper low centre and associated trough over Washington State with an upper ridge over the Yukon this morning. The upper low will move to lie over over Montana by Friday morning. As the low moves eastward, an upper ridge will build over the BC coast on Friday and into the weekend giving sunny and warm conditions to almost all of BC. The upper ridge will flatten on Monday but still give dry conditions over BC into Wednesday.