The Treasure Valley is going to be hot and hazy again on Saturday with highs in the mid 90s in the Treasure Valley, lower 90s in the Magic Valley, and low to mid 80s in higher elevations.
Cloud cover is increasing with scattered showers developing near the Nevada border. Isolated thunderstorms with heavy downpours and gusty winds are possible this afternoon and evening as the first batch of monsoonal moisture makes its way into the region.
Meanwhile, a rare tropical system will be bearing down on southern California with heavy rain overspreading the Desert Southwest Saturday night into Sunday. As of noon on Saturday, Hurricane Hilary is a major Category 3 Hurricane with sustained wind speeds of 115 MPH. It is on track to move over southern California as a strong tropical storm later Sunday evening.
Several rounds of rainfall will impact Idaho between Sunday morning and Tuesday evening. Rain showers overspread southern Idaho between 6 and 9 AM on Sunday.
There will be pockets of heavier rainfall, mainly in the mountains, but overall the rain will be on the lighter side. Temperatures will be drastically cooler on Sunday and Monday with highs in the 60s and 70s.
The main moisture from the remnants of Hilary arrives early Monday morning. Very heavy downpours with rainfall rates are expected leading to a high risk for flash flooding and landslides.
Up to 4" of rainfall is possible in higher elevations and up to 2" in the valleys. Rainfall amounts will drop off quickly further east into the Magic Valley with up to 0.5" expected.
The steadier precipitation pulls away Monday evening with scattered showers and thunderstorms continuing through Wednesday. Skies begin to clear and temperatures heat back up throughout the rest of the week.
