From the WSJ:
Officials in storm-ravaged parts of Oklahoma and Kansas are complaining about last weekend's influx of storm chasers—a ragtag band of amateur weather spotters, researchers, extreme-weather tour guides, news crews and adventure seekers. Their ranks have expanded in recent years with the advent of TV shows such as "Storm Chasers," cheaper technology for tracking weather and social-media sites where people can post news and videos of the latest storm.
Now, when a well-publicized storm pattern like last weekend's rolls around, chances are high for what storm chasers call "a convergence," in which they begin to get in each other's way—not to mention the way of emergency workers.
"In the past, there might have been 25 or 50" storm chasers during a weather event, said Todd Thorn of Storm Chasing Adventure Tours of Bozeman, Mont., which charges clients $2,400 for a week of chasing. "Now, there might be several hundred on a big day on the weekend."
The National Weather Service rightly applauds the services of chasers/spotters that provide the eyes to see what Doppler radar cannot. But, to coin a phrase, too many eyes spoil the view... not to mention cause traffic congestion.