Monsoon may light up Valley sky on Fourth of July - East Valley Tribune: Weather

Monsoon may light up Valley sky on Fourth of July

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Posted: Monday, July 2, 2012 3:21 pm | Updated: 3:04 pm, Tue Jul 3, 2012.

Fireworks may not be the only thing bursting in the sky on the Fourth of July.

On Wednesday, Valley residents have a pretty good chance of seeing the monsoon break loose right on schedule with thunderstorms and lower-than-normal temperatures, according to the National Weather Service.

Beginning late Tuesday and heading into early Wednesday, there is a 30 to 40 percent chance of rain, and from 5 p.m. to midnight on Wednesday, that will increase to a 50 percent chance of thunderstorms, with high temperatures dropping into the mid 90s, according to Charlotte Dewey, meteorologist for the National Weather Service.

“We’re just kind of waiting for things to start getting active over the desert,” Dewey said.

Last year, Valley residents first saw rain from the monsoon on July 11 when there was about a half-inch of rain throughout parts of the Valley, Dewey said. Although the monsoon officially started on June 15, rain showers usually begin around July 4.

A high-pressure system moving in from the east that now is hovering over Texas and New Mexico, is creating heavy rotating winds that are causing instability and a disturbance in the weather.

On Thursday, the high temperature is forecast to be 102, on Friday the high is expected to be 105, and on Saturday, it could climb to 107, Dewey said.

The normal high temperatures for this time of year are about 107 degrees.

As for the expected rain showers on Wednesday, Dewey said that motorists should watch out for low-lying and flat areas as dry surfaces in the desert are quick to flood.

It only takes three inches of water to cause a car to float, Dewey said.

“We urge motorists to be extremely careful,” Dewey said. “Our slogan is: Turn around, don’t drown.”

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