The phrase "incredible outpouring" means a very large and overwhelming expression or display of something, such as support, love, or emotions. Full definition
But for the most part, we have really open minded community here and there has been an incredible outpouring of support and excitement from residents both in and out of South Orange about the fact that someone this young is actually in this position. (inc.com)
The incredible outpouring of heartfelt notes and condolences from all of you have kept me strong but almost universally they have ended with «How can I help?». (businessinsider.com)
«What we have seen is an incredible outpouring of support from people all over the world — for Orlando as a community as well as a cherished travel destination,» he says. (fortune.com)