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Weather and Climate

Southern Arizonans got a taste of winter for the new year, 2019.

Photos: Storm Drops Snow on Southern Arizona

Jan 2, 2019 Forecasters issued a winter storm warning for the region until 5 p.m.
The Santa Rosa Canal ferries Central Arizona Project water to farmland within the Maricopa Stanfield Irrigation and Drainage District, Oct. 23, 2018.

Charting a New Course for Water Supply in the Southwest

Dec 28, 2018 Water managers in Colorado River Basin states spent much of 2018 working on drought contingency plans.
Sunrise over Mt. Lemmon in the Coronado National Forest.

Study: Slow Growth Ahead for the Forests of the Southwest

Dec 21, 2018 The UA report shows a decline in productivity in the 21st century as the climate warms.
Mosquitoes are historically among the worst carriers of infectious disease globally.

Researcher: Climate Change Could Worsen Mosquito-Borne Diseases

Dec 17, 2018 UA professor says globalization and increasing transportation also speed the spread of such diseases.
Low water levels at Lake Mead outside Las Vegas are prompting water leaders throughout the Western U.S. to undertake negotiations over the Colorado River's future.

Top Water Official Gives States Deadline for Colorado River Drought Deal

Dec 14, 2018 A final deal will require federal legislation and approval by the Arizona Legislature.
One of the electric vehicles in the Pima County fleet. The county plans to convert 10 percent of its fleet to EVs by 2025.

County Commits to Carbon Reduction Strategy

Dec 7, 2018 Pima County's updated sustainability plan renews its commitment to reducing carbon emissions.
The 2013 Rim Fire in California burned more than 257,000 acres.

Climate Change and Adaptation in the Southwest

Dec 6, 2018 Two recent reports have brought renewed attention to the effects of climate change on local, regional and global levels.
A research station collects snow data in Colorado's San Juan mountains, March 2018.

Early Season Snow Delights Skiers, but the Drought is Far From Over

Nov 23, 2018 Experts say the bigger picture is more complicated, and is compounded by the effects of climate change.
Earth's North Polar region.

Climate Change Could Drive Vegetation Changes

Nov 19, 2018 Tucson-based scientist charting similar changes from Ice Age.
Vehicles driving in the summer heat.

$4.5M to Support UA Center's Research on Climate Change

Oct 30, 2018 The Southwest Climate Adaptation Science Center is an initiative investigating climate change in the Southwest.
Residents of Southern Arizona employ water-saving methods to grow produce.

Citizen-Science Project Looks to Test for Polluted Rainwater

Oct 29, 2018 The five-year program teaches residents how to measure what's in their harvested rainwater.
Cracked earth in the Joshua Tree National Park, where the National Park Service says severe drought and warming temperatures will likely affect the populations and home ranges of many species.

El Niño Could Bring Drought Relief to the Southwest

Oct 24, 2018 El Niño rainfall could relieve drought conditions in states like Arizona, but drought will persist elsewhere.
The National Weather Service in Tucson, Arizona.

Cool, Wet October Follows Hottest September Recorded

Oct 15, 2018 This October is on track to be one of the rainiest.
More than 80 volunteers helped fill and place sandbags at Menagers Dam.

Dozens Remain Displaced as Tohono O'odham Nation Continues Flood Recovery

Oct 9, 2018 Damage assessments continue days after a tropical storm came close to breaching an earthen dam.
A wash in Tucson begins to flood its banks after heavy monsoon rain.

Flood Management Plan Could Bring Lower Insurance Rates

Oct 4, 2018 Pima County supervisors start process to draft a new plan that could save homeowners on flood insurance.
Photo published on the Tohono O'odham Nation's Facebook page captioned "Flooding near Menagers Dam Community."

Officials Warn Dam Could Fail and Flood Tohono O'odham Village

Oct 3, 2018 An earthen dam stands between a lake swollen with runoff and the community of Ali Chuk.

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