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Researchers at the University of Arizona Laboratory of Tree-Ring Science led the study.

  • Arizona Daily Star

Today in Tucson should be sunny with a high in the mid 70s.

  • Arizona Daily Star

Expect drier weather through Thursday.

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Four of six warmest years on record have occurred since 2009.

  • Arizona Daily Star

A hard freeze warning is in effect from 3 a.m. to 9 a.m. Saturday.

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  • By Tom Beal Arizona Daily Star

Some areas saw twice their rainfall average. Phoenix might be the biggest story.

  • Arizona Daily Star

Sunday's high temperature will be in the 80's.

Mike Leuthold of the University of Arizona's Atmospheric Sciences Department concluded early Wednesday that Odile's moisture would miss Tucson. 

  • Arizona Daily Star

Up to 1 inch of rain possible with storms.

  • Arizona Daily Star

No real chances of precipitation at least until next week.

  • By Tony Davis Arizona Daily Star

Temperatures in the Southwest are rising faster compared to those of the U.S. as a whole, a new White House report ion climate shows.

  • By Donald A. Falk and Gregg M. Garfin Special to the Arizona Daily Star

Earlier this year, scientists at the NOAA Mauna Loa Observatory in Hawaii announced a major threshold in the Earth system had been crossed: th…

Much of the heat that was supposed to fire up the globe’s air in the past 15 years — but didn’t — has gone into the ocean, a University of Ari…

  • Carmen Duarte Arizona Daily Star

Tucson hit 100 degrees at 2:39 p.m. Tuesday — tying the streak of 39 days of 100 degrees or higher, says the National Weather Service.

A severe thunderstorm warning was issued this afternoon south of Tucson, especially over Green Valley.

A radar image from the National Weather Service this afternoon showed storms all across eastern Pima County, including the Tucson metro area.

Storm activity was also prevalent in Cochise and Santa Cruz counties.

Get ready for a windy cool down in Tucson starting Monday.

  • Arizona Daily Star

The National Weather Service has issued a winter storm warning in effect through 11 p.m. Wednesday. The storm is expected to bring showers and…

Widespread showers and snow are coming down on Pima County, including reports of snow in Vail, Green Valley, Oracle and SaddleBrooke. The Moun…

  • Eric Betterton Special To The Arizona Daily Star

If climate predictions are correct, it will become hotter, drier and dustier in Arizona over the coming decades. That means giant dust storms …

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Eric Betterton