It is another hot afternoon in the Treasure Valley with temperatures running around 5 degrees above normal. Even though southern Idaho is under the influence of high pressure, southwest flow is enhancing moisture flow into the area and leading to some instability. However, the storms are very slow-moving underneath the high pressure ridge.
A few thunderstorms approach the Treasure Valley from the Owyhees this evening but any thunderstorms that do reach the Valley will have little precipitation. However, the outflow from the thunderstorms may bring areas of stronger winds and blowing dust to the Treasure and Magic Valleys.
A similar set-up is expected on Sunday, although it will be a touch hotter. Boise is forecast to hit 100 degrees for the first time this year on Sunday. Most areas in the Treasure Valley will come close to, if not exceed, 100 degrees and mountain areas will warm to the mid and upper 80s. In the Magic Valley, highs will climb into the mid to upper 90s. Once again, mountain areas will see scattered thunderstorms develop throughout the afternoon. Strong outflow winds may reach valley locations by evening.
A couple of pieces of energy will break off of a larger low pressure system off of the Pacific Northwest coast next week. As they move through to the north, cooler and breezier conditions are anticipated for the Treasure Valley, particularly on Tuesday and Thursday. Highs will be near normal and wind gusts up to 30 MPH are possible.
