Remnants of Andres to Enhance Thunderstorms From Arizona to Wyoming
By By Kristina Pydynowski, senior meteorologist
June 08, 2015, 1:23:33 AM EDT
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While Andres became a remnant low Thursday afternoon, some of its moisture will still be drawn into the Western United States to enhance thunderstorm activity into this weekend.
The moisture of once-Major Hurricane Andres is being drawn eastward and will survive the journey to the Desert Southwest and Rockies of the United States.
That moisture will interact with a non-tropical storm system to enhance thunderstorm activity.
Thunderstorms will increase across portions of Arizona, New Mexico, Colorado, Utah, and Wyoming.
The thunderstorms will be most numerous in and around the mountains, and the afternoon and evening hours will be the most active time of the day.
Moisture from Andres will bypass drought-stricken California, but the non-tropical system will still produce daily thunderstorms over the state's mountains into this weekend. Moisture from the non-tropical system will also bring spotty storms to Nevada and Idaho.
Despite having a tropical nature, the moisture from Andres will not be deep enough to bring widespread flooding concerns. However, localized issues may arise.
That is especially true along the smaller streams and creeks being fed by melting snow from the mountains of Colorado, Wyoming and Utah.
The rainfall will be otherwise beneficial with most of the Western U.S. still in the midst of a drought.
The storms could be a risk for hikers or anyone else with outdoor plans. This includes those in Flagstaff or the Grand Canyon in Arizona, San Juan National Forest in Colorado, Ashley National Forecast in Utah or Yellowstone National Park in Wyoming.
Locations across the Desert Southwest are expected to remain dry of shower or thunderstorm activity on Saturday.
Anyone spending a part of Saturday outdoors is urged to keep an eye to the sky and on AccuWeather MinuteCast® and have a plan in place for where to seek shelter in the event a thunderstorm threatens.
As soon as thunder is heard, the risk of being struck by lightning is present.
While the moisture from Andres will be located higher up in the atmosphere, "Dry air located at the surface will lead to gusty outflow boundaries [cooler air rushing away] from the thunderstorms, which can travel miles away from their parent storms," according to AccuWeather Meteorologist Evan Duffey.
As moisture from Andres fizzles, attention will then turn toward Major Hurricane Blanca. Despite weakening, Blanca will still threaten Mexico's Baja California this weekend with its moisture possibly once again enhancing thunderstorm activity in the Southwest U.S. next week.
"It is unusual to have to deal with the remnant moisture from Pacific hurricanes in early June," stated AccuWeather Western Weather Expert Ken Clark. "It is much more likely late in the year than early."
Andres and Blanca are unusual themselves by both becoming major hurricanes before the end of June.
On Wednesday, Blanca became the earliest second major hurricane to form in the eastern Pacific since reliable records began in 1971.
In addition since 1971, there have only been four other occurrences when two major hurricanes formed in the eastern Pacific by the end of June with the most recent being 2010.
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