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Weather and Climate

Tucson Sets Hottest Year Record, Again

Jan 1, 2018 Record was set in 2014, tied last year and broken in 2017.
Cars travel on the Catalina Highway.

AAA: More Than 1/3 of Arizonans Will Travel for Holidays

Dec 22, 2017 While many will take to the road, most will not be leaving the state.
The sun sets after a hot summer day.

November Sets Tucson Heat Record

Dec 4, 2017 And 2017 is on track to be warmest year recorded in Southern Arizona.
The highest temperature ever recorded in Tucson was 117 degrees, in 1990.

Thanksgiving High Temp Could be Hottest on Record in Tucson

Nov 21, 2017 Each day of the four-day weekend could see record temperatures, and 2017 may mark hottest year ever in the city.
Looking across the city of Tucson from Tumamoc Hill.

No Rain Fell in Tucson in October, Officially

Nov 1, 2017 It was the 12th time the Weather Service recorded no rainfall for the month.

Weather Service Rolling Out More Precise System for Dust-Storm Warnings

Oct 31, 2017 The new system will only notify cell phone users within a certain range of the storm.
The bright sun sets behind some trees near Soleng Tom Elementary School on Tucson's east side.

Study: Most Americans Face Growing Number of Extreme-Heat Days

Oct 30, 2017 Two-thirds of the population experiencing higher number of extreme-heat days compared with previous decades.
NOAA's 2017-18 winter temperature probabilities.

Southern Arizona Can Expect a Mild Winter Despite Recent Heat Records

Oct 20, 2017 Warm and dry, for the southern half of the country, but not enough to break the top 10, meteorologists predict.
Global average carbon dioxide concentrations as seen by NASA’s Orbiting Carbon Observatory-2 mission, June 1-15, 2015.

NASA: Spike In Atmospheric CO2 Related To El Nino

Oct 18, 2017 A vicious cycle might await if future climates reflect similar conditions of heat and drought.
Hurriane Maria in the Caribbean approaching Puerto Rico, September 2017.

Raytheon Drones Fly Into Hurricanes to Collect Data

Sep 28, 2017 'Coyotes' were used recently in Hurricane Maria to aid in continuous monitoring.
Cars drive through flooded streets during a monsoon storm. From July 2017.

Dry End Bringing a Close to Above-Average Monsoon

Sep 25, 2017 Months that proceeded a record-breaking July have brought below-average rain.

'Mini-Spike' in AZ Gas Prices After Hurricane Harvey Expected to Pass Quickly

Sep 5, 2017 An industry analyst says a significant rise isn't expected, and prices should return to normal by the end of the month.
A man rests in the shade on a hot day in Tucson.

Dry, Hot August Follows Record-Setting July Rain

Sep 4, 2017 Weather Service meteorologist says storms become less frequent in September, unless a large Pacific storm hits.
The five-day outlook shows a strong chance that a cyclone will form of the Baja Peninsula by the end of the week, possibly bringing storms to Southern Arizona.

Large Pacific Storm Could Bring Heavy Rain to Southern Arizona

Aug 28, 2017 Storm forming south of the Baja Peninsula has strong chance of becoming a cyclone.
DeAnna Bublitz finds plenty of cicadas on the University of Arizona's mesquite trees.

Summer's Insects Draw Scientists to Southern Arizona

Aug 28, 2017 Hot and humid weather is optimal for exploring the outdoors.
The Flandrau Science Center and Planetarium (left) and the Kuiper Space Sciences Building (right) on the University of Arizona campus.

UA Opens Science Classes to the Community

Aug 14, 2017 The school is offering reduced tuition to attend lectures in many subjects.

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