A strong winter-like storm making its way into the Valley will bring blowing dust and dropping temperatures Wednesday and Thursday before temperatures warm up for the weekend.
The forecast calls for areas of blowing dust Wednesday afternoon and evening, with gusts up to 35 mph. Blowing dust may impact travel between Arizona and California and around much of the state, according to the Arizona Department of Transportation Web site.
The Arizona Department of Environmental Quality has issued a PM-10 health watch for Wednesday following a wind advisory from the National Weather Service for all of Arizona.
A PM-10 health watch is issued when “particulate matter” levels may approach federal standards. Particulate matter at high levels can be a concern for people with respiratory or heart conditions, the young and the elderly. The ADEQ advises limited time outdoors during a health watch.
High temperatures Wednesday should be close to normal at this time of year, between 74 and 79. There is a slight chance of rain in the evening, with lows in the mid 40s to mid 50s.
Thursday may bring showers and thunderstorms, with a significant temperature drop. The high may only be in the low 60s, with lows in the upper 30s to upper 40s.
More rain is expected Thursday evening, which should help the air quality forecast for the rest of the week, ADEQ said.
The storm could bring snow showers to Flagstaff Wednesday evening and Thursday, with the snow level dropping to 4,500 feet.
Friday and the weekend should warm up in the Valley under partly sunny skies, with high temperatures forecast for the upper 60s to mid 70s.