This is what tornado weather feels like

When it gets hot and humid outside (right now, it's 90° outside with a dewpoint in the seventies), a certain feeling outside tells long-term residents of this part of the country that things could get nasty. That's being confirmed by scientific observation today, with the Storm Prediction Center slapping a tornado watch over our neighbors just to the south and west. Conveniently, the local National Weather Service office here in Des Moines has begun testing an interactive weather briefing that goes into good detail about the conditions out there. It's a little more technical and a little less graphically pretty than what you'll get on radio or television, but it's candy for weather nerds.