The rain most Utahns welcomed Saturday caused major problems for Salt Lake-area fire and police departments.

By mid-afternoon, lightning had knocked out the power in several blocks, causing power surges that triggered fire and burglar alarms throughout Salt Lake County.Fire trucks and police cars kept busy answering dozens of false alarms. Adding to the confusion, the power went off in the Salt Lake County sheriff's office, Salt Lake police station and the Salt Lake City Fire Department. Dispatchers momentarily worked by light created by generators.

More than 100 lightning strikes were detected from one storm that developed in southwest and south-central Utah within a 30-minute period Saturday morning.

Widespread thunderstorms through out the state were caused by an air mass that became moist and unstable. Combining with the heat from the sun, the strong thunderstorms dominated the weather Saturday, decreasing in the evening.

The forecast for Sunday and Monday calls for partly cloudy skies with more scattered afternoon thundershowers. Highs Sunday and Monday will be mostly in the 90s, while the lows Sunday night will be in the mid-50s to the mid-60s.

The extended forecast Tuesday through Thursday calls for partly cloudy skies to continue, with widely scattered afternoon and early nighttime thunderstorms mainly in the southern and eastern portions of the state.

Highs will be in the upper 80s in the north to near 100 in the south. Lows will be in the upper 50s to near 70.