Showers and scattered thunderstorms were expected to cross the Great Plains into the Upper Great Lakes on Monday.

The front edge of the low-pressure system was expected to track across central Wisconsin and into northern Michigan by Monday evening, while a second wave would stretch across the mid-Mississippi Valley by the afternoon.

In the West, cool weather was expected for the coast, with scattered showers and thunderstorms across the Southwest, Great Basin, and the higher elevations of California. Areas of fog, lingering low clouds, and patches of drizzle to showers to settle along the California shoreline.

Elsewhere, predominantly dry and fair conditions were forecast across the East. Scattered showers and thunderstorms were on tap across areas of the Carolinas.

Temperatures in the Lower 48 states Sunday ranged from a low of 19 degrees at Mt. Washington, N.H., to a high of 102 degrees at Needles, Calif.