The Border Patrol is warning of the dangers of crossing the Arizona desert as temperatures shoot up this month.

April marks the start of Ozone Season in the Valley, which runs through September -- a longer-than-average season for higher levels of ozone pollution.

Spring arrived in Arizona early Wednesday morning, at 4:02 local time.  And, as KJZZ’s Dennis Lambert reports from Phoenix, winter was about average this year.

Pea- and nickel-sized hail pounded parts of the Valley Friday afternoon. The late-winter storm is also bringing snow to Northern Arizona.

Despite this week’s rain and snow, water experts say the state is still below average in terms of snowpack, which leads to spring run-off.

It doesn't happen often, and it's always a surprise when it does, but we had what amounted to snow in the Valley on Wednesday afternoon.

Winter weather has prompted transportation officials to close sections of U.S. 60 just east of the Valley.

Coconino County officials are alerting motorists and people in the back-country areas of possible avalanches in the San Francisco peaks through at least Tuesday.

Prices for winter lettuce grown in southwestern Arizona are rising because of damage caused by the freezing temperatures.

Cold has descended on an area of the country that's known for it's near-perfect weather this time of year. For days now, Southern California and Arizona have suffered through nights of sub-freezing temperatures.