Gallery Section
Telling the story with pictures

Frost Free Season is Getting Longer

Frost Free Season is Getting Longer

All regions of the continental U.S. have seen the frost-free season, defined as the stretch between the last below-32°F reading in the spring and the first in the fall, grow longer.

A Seasonal & Regional Tornado Breakdown

A Seasonal & Regional Tornado Breakdown

The probability of a tornado touchdown somewhere in the U.S. jumps to nearly 80 percent in May and nearly 90 percent in June.

Temps Marching Upward Since First Earth Day

Temps Marching Upward Since First Earth Day

The contiguous U.S. has warmed 2.1°F since the first Earth Day in 1970.

Spring Snow Cover

Spring Snow Cover

While this has been a snowy winter, the past 50 years have shown a trend of less overall spring snow cover in the Northern Hemisphere.

Spring is Arriving Earlier in the U.S.

Spring is Arriving Earlier in the U.S.

Spring is arriving earlier across the U.S. by an average of three days.

2013 Record Highs vs. Record Lows

2013 Record Highs vs. Record Lows

For the first time in 20 years, the U.S. is on track to set more record lows than record highs in 2013.

Autumn is Falling Back

Autumn is Falling Back

Foliage color and timing has been starting later, on average, in a warming world.

Record Highs vs. Record Lows

Record Highs vs. Record Lows

Record highs have outpaced record lows by a bigger margin each decade since the 1960s.