they ended up reassessing the fujita scale. not sure where it would fit now. you would think it would be in the ef-5 range. >>> today, much quieter, we're looking at the clouds which are slowly breaking. southern maryland, we have a lot more sun north and west. it's not operational yet, but when it goes online, for real, it's going to be spectacular. temps right now, near 80 degrees in town. owings, one of the warm spots at 84. dumfries is at 80. we have a beautiful afternoon now that we've cleared out. here's our michael and son camera. stepping outside this afternoon, enjoy it, not too much of a breeze and temperatures in the 70s. back with a look at the rest of your seven-day forecast in a few minutes. >>> president trump has some strong words for north korea tonight. >> north korea best not make any more threats to the united states. they will be met with fire and fury, like the world has never seen. >> the response comes after north korea crossed a major threshold in its efforts to develop nuclear weapons. our editorial partners at "the washington post" r

but that's fujita scale was invented from the university of chicago in the '70s and implemented by the national weather service in the eighties or late '70s. so what they were able to do with tornadoes like that based on those photographs indicating that ef2 or ef3 but it is probably in the record book but that is a great question. [inaudible] >> have you really look that the data collection? going back to a communication or data collection and how that is a possibility?. >> metadata say great question and i think about quite a bit because it is the question that if i am wrong about the data or mistaken then of course, my conclusions will be different. one of the things that we do is try to use survey currently. the other thing is when we build the models we take into account the ef scale was implemented so as a statistician to put that in my model not in the laboratory since but a statistical sense so live able to capture quite a bit there's all kinds of stuff but it is random variation but if there is any systematic the models will catch it that is the nature of statistical models to

of ef-1 plus tornados, those are, so we rate these tornados on this safer simpson scale-- or the fujita scale and when it starts at zero and ef-1 tornados win about 40 meters per second or 80 mile per hour. so 80 mile per hour hurricanes are stronger and we don't really see any trend in the numbers much storms. so, this absence of trends in tornado occurrence doesn't imply that the tornado climate is stationary, okay? but it often stifles the discussion. so, what we find is the number of days with tornados provide additional information about what, how a tornado might be occurring. unlike hurricanes, we don't have any theory to hold-- hang our hats on with regard to how, what tornados might be like in the future. we do understand the data and there are a lot more tornados than hurricanes, so we have something to go on there. unfortunately, we have become much, much better at observing tornados than in the past. so if you look at a long record of tornados there's generally an increase in numbers, but that's because, we probably are able to communicate what we see and there's just more pe