Meteorologists Predict Southwest Winter May Be Wetter Than Normal

Published: Tuesday, September 4, 2018 - 4:11pm

The National Weather Service has predicted the Valley will move away from 110 degrees and higher temperatures as a relatively wetter than normal monsoon cycle winds down.

Meteorologist Marvin Percha said Arizona saw a little more rain than neighboring states because activity in the central and eastern Tropical Pacific was shifting from a La Niña into a potential El Niño pattern.

Percha said early predictions show a 60 to 70 percent chance for the El Niño to fully form, which typically moves the jet stream that carries vital moisture over the central west coast.

"The jet stream tends to be further south across the Pacific," he explained, "and then it heads north up through the central and eastern U.S. and that favors warmer than normal winters across the central-eastern part of the country and wetter than normal winters in the southwest."

He cautioned against planning on moisture in the southwest Rockies and California just yet. Weather charts will have evolved for closer predictions in eight more weeks.

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