November 25, 2014; 5:40 PM ET
A storm packing rain, wind, low clouds and snow will lead to travel difficulties around Washington, D.C., especially Wednesday into Wednesday evening. more >
Rain this morning will change to snow and accumulate less than an inch; roads will be mainly wet
The United States and China surprised climate-policy watchers this week by announcing a rare accord to cut carbon pollution.
The long, harsh winter at the start of 2014 led some experts to predict that the cold season's "polar vortex" would turn into a "pollen vortex" during the warmer parts of the year, with a massive pollen eruption and a brutal allergy season.
The annual surge of sneezing, watery eyes and runny noses for allergy sufferers is only poised to get worse as the climate changes, and new research shows that greenhouse gases have a direct effect on aggravating these problems.