Timelapse video can help a meteorologist see movement at different levels of the atmosphere, providing a unique look at the weather.
The jet stream hunkered to the south Wednesday, promising to bring nearly a week of temperatures that could dip to 20-below or worse in the northern midsection of the country.
Everything had to come together just perfectly to create the killer tornado in Moore, Okla.: wind speed, moisture in the air, temperature and timing. And when they did, the awesome energy released over that city dwarfed the power of the atomic bomb that leveled Hiroshima.
Japanese nuclear reactors are continuing to leak radiation. In fact, radiation has been detected as far out as 100 to 200 miles out to sea from Japan. Can that radiation make it to the United States?