Century mark expected to make first appearance in Phoenix

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By Andrew Michalscheck By Andrew Michalscheck

PHOENIX -- Many of you were dreading this day, others couldn't wait, but it looks like the first 100-degree day of the year will arrive in the Valley Sunday.

Grab the iced teas, look for the nearest pool and make sure your air conditioner is ready to rock.

High pressure over the northeastern Pacific continues to expand, allowing a warm and dry air mass to pump in from the northwest. This setup will allow the mercury to rise into the triple digits for the end of the weekend and start of the next workweek.

Sunday morning, look for the coolest part of our day, as low temperatures dip into the upper 60s across the Valley. 3TV forecasters expect Sky Harbor airport to reach 100 on Sunday and 101 both Monday and Tuesday before we break the heat midweek.

Our forecasting models suggest a storm system will move through the Great Basin and Rockies on Wednesday, while dragging a dry cool front across our area. This will allow temperatures to gradually drop. On Wednesday, we’re looking at the mid 90s for highs across the Valley, followed by the low 90s Thursday through Saturday.

To put things in perspective, a normal high temperature for this time of the year at Sky Harbor is 89 degrees. Last year, we hit the 100-degree mark on April 21. On average, we see our first 100-degree temperature on May 2.