"What is the saying April showers?
Proverb. The month of April, traditionally a rainy period, gives way to May, when flowers will bloom because of the water provided to them by the April rains. (by extension) A period of discomfort can provide the basis for a period of happiness and joy."
https://en.wiktionary.org/wiki/April_showers_bring_May_flowers
This is not a "BOOM".
Ah sorry, didnt check if it was posted earlier. But to me its a clear indication that we are in for a ride in April.