Our new weather pattern continues with the passage of a weak cold front overnight or early Wednesday that will bring a reinforcement to the seasonal air mass in place over Southwest Virginia. As it pushes through, some showers or storms may linger or even redevelop — much of the heavier rain stayed north of the I-64 corridor Tuesday, with some isolated showers and storms elsewhere. Temperatures on Wednesday will be near seasonal norms, which are generally 80s for highs and upper 50s to mid 60s for lows, cooler to the west and warmer to the east. We may see a brief spike of relative warmth on Thursday and perhaps Friday — some highs in the low 90s possible in the Roanoke Valley south and east — before a rather strong front brings a push of Canadian air late Friday and early Saturday. Though the air is becoming modified as it advances southward into August heat, it will knock temperatures back several degrees — 50s lows, with some 40s, and mainly 70s highs, with maybe a few low 80s, still appear a good bet for the weekend. The 6-10-day Climate Prediction Center map continues to paint light blue in the western half of Virginia with darker blue in the states to the west, indicative of the new weather regime that will likely continue normal to below normal temperatures for the next week or possibly two as occasional cold fronts reinforce the existing Candian-influenced air mass and extreme heat remains over the West.