Confidence continues to increase in widespread thunderstorms across parts of the Northwest an northern Great Basin Wednesday. As moisture associated with a prominent shortwave trough lifts northward, thunderstorm development is likely by early afternoon across the higher terrain of northern CA/NV and southern OR. Forecast soundings depict weak buoyancy atop inverted-v thermodynamic profiles, which would support high-based, fast-moving thunderstorms over receptive fuels. With minimal rainfall accumulations, lightning ignitions are likely. A few storms may persist overnight as the shortwave trough continues northward into southern WA and the Cascades. Given the threat for scattered to numerous thunderstorms, critical dry thunderstorm highlights will be maintained and shifted west/south for recent model guidance.
