This is an archived article that was published on sltrib.com in 2014, and information in the article may be outdated. It is provided only for personal research purposes and may not be reprinted.

Utah's new work week was ushered in by thunder, lightning and heavy rains, prompting the National Weather Service to place the southern two-thirds of the state under a Flash Flood Watch.

That advisory stretches through Tuesday afternoon. Exactly when and where the feared flooding of mountain waterways, slot canyons and burn scars could occur is a mystery Friedrich Nietzsche might ponder, along with questions about time and sentience.

"Lightning and thunder require time, the light of the stars requires time, deeds require time even after they are done, before they can be seen and heard," the 19th century philosopher once wrote.

So? Just wait and see.

As for the Wasatch Front, forecasters predicted Tuesday would indeed be a wet and wild affair. Thunderstorms and rain squalls were expected to cycle through in both the morning and afternoon hours, with daytime high temperatures in the mid- to upper-70s.

Monday's highs were forecast to reach into the 80s as the intensity of thunder and rainfall built through the day. In the evening hours, winds of 10-20 mph were to join the show, driving the heavier rainfall through the nighttime hours.

Southern Utahns braced for widespread and heavy rainstorms, punctuated by nature's rumbling light shows. Highs were to climb into the upper-80s both days.

All that atmospheric stirring and precipitation does wonders for the air our there: the Utah Division of Air Quality forecast "green," or healthy conditions for the entire state into Tuesday.

Still, the Intermountain Allergy & Asthma website warned Monday that grass, chenopods, sagebrush and ragweed are all at "high" levels on its pollen index, with mold "moderate."

To find more detailed forecast information, visit the Tribune's weather page at http://www.sltrib.com/weather.

Twitter: @remims