bob henson is a meteorologist and blogger with "weather underground," an online weather service ownedather.com. bob, start with the tornados, if you would. how unusual either in terms of the time of year or the number of them or the severity, what are you seeing? >> well, it's not uncommon to get tornadoes in the south, including texas, all through the wintertime, it's certainly possible. the strength of the tornado that hit in the dallas area saturday was unusual. it was the strongest tornado over to hit texas in december. there have been tornadoes that strong in other parts of texas in the south in december. it was unusual because it hit the eastern part of the dallas-fort worth metro area. forecasters are worried what would happen if a tornado hit d.f.w. hit on. this was a glancing blow but still pretty catastrophic. >> brown: are we better at predicting or forecasting them? >> this was better on the watches as the storms moved in, so we're certainly better at capturing those. indicative of that is something like 1,000 structures were damaged or destroyed but the first number of de