https://www.cnet.com/news/hurricane-harvey-new-color-national-weather-service-maps-texas-louisiana-tropical-storm-harvey/

In a tweet sent out Monday, the NWS explained that so much rain has fallen on Texas and Louisiana because of the storm, the previous map code didn't cover it. Water levels could reach 50 inches in some areas, the NWS reports.

The previous map used a kind of a red-violet color to indicate rain levels over 15 inches. The new map the NWS tweeted out added a dark purple level to show rainfall of 20-30 inches, and a new lavender color indicating rainfall over 30 inches. Yes, a grim use of Prince's famed "purple rain."