Observing & Predicting
- September 17, 2014
Natural variability can explain much of Earth's average temperature variation since the end of the last ice age, but over the past century, global average temperature has risen from near the coldest to the warmest levels in the past 11,300 years.
- September 16, 2014
Temperature extremes have been pretty unusual across the United States so far in 2014. Looking back over this time period quickly reveals at least part of what was going on: the polar jet stream got into a serious rut.
- September 10, 2014
Flash floods scoured Phoenix and surrounding areas on September 8, 2014. How did the rainfall totals compare to normal September precipitation?
- September 8, 2014
It's the time of year for potentially toxic algae blooms in Lake Erie. But the stage for most blooms is set in spring.
- September 4, 2014
On July 11, Lake Mead reached its lowest water level since construction of the Hoover Dam in the 1930s. Many scientists are concerned that the prolonged drought could be a sign that the region will face significant water supply challenges due to climate change.
- September 3, 2014
Drought in the far West and the southern portion of the Great Plains—regions that are already experiencing extreme and exceptional drought—will likely continue or worsen through September.