Phoenix weather: Warm weather arrives; triple digits imminent

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By Catherine Holland By Catherine Holland

PHOENIX -- Our first triple-digits days of the year are just around the corner.  Tuesday brought Valley highs into the low 90s, but Wednesday we should see some mid 90s around town, with an official forecast high of 95 degrees.  That's almost 10 degrees above average for this time of year, but a few degree shy of today's record of 100 degrees. 

Overnight lows should dip to the mid 50s to mid 60s around the Valley under mostly clear skies.  Over the weekend, the Valley should see our first 100-degee high on Saturday.  On Sunday and Monday, look for temperatures a bit warmer, near 101 or 102.  The heat should ease up a bit by the middle of next week as our high-pressure ridge loses strength.

Strong high pressure and lots of sunshine is also the reason the Valley is under an Ozone Health Watch today. That could possibly be raised to a High Pollution Advisory tomorrow and Friday.   The Arizona Department of Environmental Quality says ozone is moving in from Southern California and mixing with what's already in place over the Valley.

Ozone is an invisible gas that is created when other pollutants in the air are heated by the sun. Health officials say Phoenix-area residents with existing respiratory conditions should limit time outdoors Wednesday, especially in the late afternoon when ozone production peaks.

Ozone season officially under way; invisible danger in the air

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