We all know that blizzards are more likely to occur in the winter, but do you know when you are most

We all know that blizzards are more likely to occur in the winter, but do you know when you are most likely to witness a waterspout? If not, this graphic is for you.These calendar heat maps show the annual trends for ten weather-related phenomena. To generate them, I summed the number of instances of each event for every day of the year between 2005 and 2014, inclusive. I then converted the counts to percentiles separately for each type event so that I could use a consistent scale, which ranges from 10th percentile (anything less is light yellow) to 90th percentile (anything greater is dark green).  A few fun facts:-Though wildfires are uncommon in the winter months, there is an outlier on January 1st. Possibly due to fireworks, but July 3rd is more wildfire prone than July 4th!-Of the events graphed, hail is the most concentrated in a single month (June). Lightning, which is also associated with thunderstorms, is slightly more common in the summer months rather than late spring.-While funnel clouds and tornadoes exhibit similar seasonality, most commonly occurring in the spring, waterspouts prefer the summer. Data source:http://www.ncdc.noaa.gov/stormevents/http://www.nws.noaa.gov/directives/sym/pd01016005curr.pdf (definitions of the terms) -- source link

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