Phoenix weather: First weekend of summer includes toasty temps in the ValleyPosted: Updated:
PHOENIX -- It may have felt like summer started months ago in the Valley, but according to the calendar, Friday is the first official full day, and the weather will vouch for it.
High pressure to our southeast continues to influence our hot and dry weather pattern. We’re forecasting a high of 107 in Phoenix both Friday and Saturday with 106 on Sunday.
Meanwhile, a trough of low pressure across the Pacific Northwest will continue to produce gusty winds across northern Arizona for the weekend. The trough will shift to the east by Sunday just before a stronger system moves in for Monday. This system may create stronger winds for northern Arizona on Monday.
Red flag warnings are in effect for the Mogollon Rim and to the north from 11 a.m. to 8 p.m. Friday. Sustained winds are expected to range from 15 to 25 mphwith gusts of up to 40 mph.
The Prescott area does not fall under this Red Flag Warning, but weather conditions will still be critical for crews batteling the Doce fire. Sustained southwest winds will range from 10 to 25 miles per hour with gusts of 30 to 35 miles per hour. Relative humidity will be down to 10 percent during the afternoon. There will be very little change into the weekend.
Next week, temperatures across the Valley will remain seasonably hot, but by Wednesday, a stronger ridge of high pressure will build into the region. This will trigger temperatures to soar from the 110- to 115-degree range into Thursday. Excessive Heat Warnings may be issued by the National Weather Service during this time.