Phoenix weather: waiting for the monsoon to return

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By Andrew Michalscheck By Andrew Michalscheck

PHOENIX -- Even with all the clouds around Arizona Thursday, the atmosphere was still relatively stable. We are, however, expecting changes over the next several days that should enhance our chances for thunderstorms, especially in the mountains of our state.

In the meantime, it’s also going to be pretty warm, with Phoenix highs near 108 through Saturday.

The most potent part of our forecast appears to be a surge of moisture just to the south of us in Mexico. Over the next 48 hours, the steering currents in the upper atmosphere are going to become more southeasterly and allow that moisture into Arizona. That combined with daytime heating should result in a fairly active thunderstorm weekend.  Although at this point, the most active day may be Monday of next week.

In terms of the amounts of rain, it’s pretty hard to settle on a number. However, it’s likely that by early next week, many locations around Phoenix will see up to a quarter of an inch of rain, or more.

The other weather note is an Ozone Advisory for Friday in metro Phoenix. Ozone levels are expected to pose a health risk, especially during the late afternoon and evening hours. We’re all being asked to reduce our driving and refrain for using gasoline powered devices.