Hottest temps of the year creep into the forecast

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By Christina O'Haver By Christina O'Haver

PHOENIX -- A ridge of high pressure building into Arizona will bring about some of the hottest temperatures so far for the year by midweek.

Saturday afternoon, Phoenix Sky Harbor reported a high of 107. This was noticeably warmer than Friday’s 103. The normal high for this date is 106.

Temperatures are expected to gradually climb Sunday and Monday. By Tuesday, some Valley communities may reach 112. That heat is expected to stick around for Wednesday.

As the ridge tracks north and east, moisture is expected to be pulled into Arizona from the south, signifying what may be the start of the monsoon. By Thursday, we may see storms impacting the southeast portion of Arizona, with isolated storms possible across the rest of the state on Independence Day. The atmosphere may still be too dry to squeeze out any rain for the Valley, so we may just see dust storms.

Otherwise, daytime highs should drop several degrees Friday and into next weekend, with overnight lows warming several degrees, thanks to the higher humidity and cloud cover.

For firefighters battling the San Juan Fire east of Show Low, winds were relatively lighter Saturday afternoon, in comparison to Friday. For Sunday, winds are expected to gust to around 25 mph from the west during the afternoon. Humidity will be between 15 and 20 percent, and highs will be in the upper 80s.