09/11/2026
Another September storm system coming to the PNW soon. Fortunately power outages were relatively small with the last one, hopefully this one too.
PNW SATURDAY STORMS⛈️a compact upper-level low will move inland across southwestern Washington and northwestern Oregon Saturday, bringing widespread showers and unusually cold air aloft. As the colder air moves over the relatively milder surface, temperatures will decrease rapidly with height, creating steeper lapse rates and increasing atmospheric instability. This setup can support scattered thunderstorms capable of lightning, brief heavy rain, gusty winds and small hail.
The circulation around the low will also increase localized low-level wind shear and spin in the atmosphere. Convergence boundaries beneath the low could concentrate that rotation, allowing stronger shower updrafts to stretch it vertically and produce cold-air funnel clouds. Most cold-air funnels remain weak and never reach the ground, but an isolated brief touchdown cannot be ruled out, especially near the coast or over the open waters of the Pacific.
If you have outdoor plans, such as hiking, camping or boating, be prepared for storms and move indoors and off water quickly if storms approach⛈️