Coastal Fire Weather Forecast to Monday
Friday, June 20, 2025 at 9:30AM Weather Forecast
SYNOPSIS: An unseasonably deep low-pressure system will remain offshore near Haida Gwaii supporting a dry southwesterly flow across most of the Fire Centre on Friday. Showers associated with the low will remain confined to the North Island, Mid Coast, and Haida Gwaii. Instability near the low will support the potential for afternoon thundershowers over Haida Gwaii and the Tweedsmuir Park area. Otherwise, the southern reaches of the Coastal Fire Centre will enjoy a mainly sunny day with moderate inflow winds. Afternoon gusts up to 30-40 km/h can be expected through the Fraser Valley, the Fraser Canyon, and up the Sea-to-Sky corridor. The low will drift south overnight tonight bringing with it increased cloud cover and showers by Friday morning. Bands of showers drifting in from the east will affect mainland zones on Friday with a big downturn in fire weather indices. Showers will be spottier over the Island Friday and primarily confined to the ridge tops. All zones will experience cooler, more humid conditions on Friday.
Saturday to Monday: A ridge of high pressure will build over the North Coast beginning Saturday while the low drifts further south into Oregon. Northern reaches of the Fire Centre including Haida Gwaii and the Mid-Coast will be the first to warm and dry. Showers will linger over inland sections of the Fraser and Pemberton Zones Saturday before clearing on Sunday. The ridge will allow temperatures to gradually return to seasonal temperatures (highs in the mid 20’s) by Monday. The pattern will remain inflow through the period, preventing relative humidities from dropping much below 30%.
Fire Chief J. Caldbeck