Excessive heat warning extended though Friday

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by Catherine Holland

Weather forecast by Meteorologist Royal Norman

Posted on August 24, 2011 at 7:26 AM

Updated Thursday, Aug 25 at 6:01 PM

PHOENIX – The National Weather Service has extended an excessive heat warning, now in its third day, through Friday night. The warning originally was supposed to expire Thursday night.

While it’s going to stay extremely hot for the next several days, we are likely done breaking records. With a high of 114 degrees forecast for Wednesday, that’s not much comfort.

Both Monday and Tuesday saw record-breaking highs. We topped out at 114 Tuesday, breaking the  previous record of 112, which was set in 1985.

A ridge of high pressure sitting over the Southwest it what has been keeping us so warm, well above the seasonal average of 104 degrees.

“[We’re seeing] very hot temperatures for late August, even for us,” Warnecke said.

We've already had 24 days of 110-plus highs this year. Based on the forecast, we're closing in on the record of 32, which was set in 2007.

This current heat wave should finish peaking today. Temperatures should start to ease down a tiny bit as we get closer to the weekend and monsoonal moisture returns to the weather mix.

There’s a slight chance of some isolated storms Wednesday evening, including the potential for blowing dust in the evening of storms form to the south of the Phoenix metro area.

Plan on a high of 112 Thursday with a slight chance of storms in the afternoon and evening. That chance slightly increases Friday.

We should see a high of 111 then, followed by 109 on Saturday and 110 on Sunday. The chance of storms remains in the forecast through the weekend.

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