When we present our severe weather forecasts to you on-air and online we usually include the Storm Prediction Center's covective outlook, which indicates where storms will be severe based on Slight, Moderate, and High risk categories. After 35 years the SPC is modifying those categories by adding two of them tomorrow. We'll now have Marginal, Enhanced, Slight, Moderate, and High risks issued. Below is a comparitive breakdown of the new risk categories and the charted criteria for using them on the right.
high-end Slight Enhanced
Obviously this will impact the maps the SPC posts as well as the ones we show you on TV. Below is a comparison of what the April 27th, 2011 severe weather outbreak to our south looked like on the current SPC outlook scheme compared to what it would've looked like using the new categories.
***THESE ARE OLD OUTLOOKS. NO SEVERE WEATHER IS IN OUR FORECAST***
While more categories may be more confusing, I am definitely a fan of replacing "See Text" with Marginal since the "See Text" taken out of the context of their website and discussion is confusing. We have no severe weather in the forecast the for the Louisville area at this time and hopefully we won't have to show you these new outlooks anytime soon!
Read SPC's full article on the changes: Click Here