Cool Tornado Warning Map!

Here's a cool piece of information that combines my love of weather and my love of geography. This map below shows the days since the last tornado warning by National Weather Service office regions. The map was made on June 30th, so i'm sure it has changed over the last week but for some areas (like where I live it has not).  The dark grey areas are the office regions that have recently issued a tornado warning in the last 30 days. However the red areas are office regions that haven't issued a tornado warning in over a year! 

Interesting enough, one of those regions is the New York City NWS office, which forecasts for NYC, Long Island, parts of the Hudson Valley and southern Connecticut.  According to this map, the last time the NYC region NWS office issued a tornado warning was 728 days ago (Now that it's July 9th, that makes it 737 days!) 

The only office region that has a long streak of no tornado warnings is southern Oregon, where they haven't issued a tornado warning in 3599 days (or 3608 days as of July 9, 2015). That's almost a decade!  

*This map doesn't illustrate the last time an area was hit by a tornado, just the last time a tornado warning was issued by the office. Tornadoes unfortunately do occur without any official warnings.