So close... so very close... if we can stay dry just one more day we will put another record in the books for being the first dry calendar month. But mother nature might have different plans, as an upper low is forming to the southwest of BC, bringing the threat of evening showers and perhaps even afternoon thundershowers later today to the South Coast. Looking at the lifted index - the greatest threat of thunderstorm activity will be on Central Vancouver Island and near the Coastal Mountains.
Expect seasonal average temps again today with highs into the low twenties, but as a cooler airmass approaches, temps will also cool off slightly down to about 20 degrees for an afternoon high for the weekend.
The surface high has been just holding steady for a while now keeping the weather systems at bay over the pacific - see surface analysis / sat image. Despite its efforts to keep the systems away, the new upper trough will bring instability to most of Southern BC over the next few days.