blood weather

Any pattern of pleasant weather in one geographic location which is the meteorological product of a natural disaster in another geographic location-such as a tornado, hurricane, or drought.

Dude 1: "Man, it feels great out today! It's 20 degrees cooler than usual!"
Dude 2: "That's blood weather my dude. Houston got wrecked by hurricane Harvey, and I'm pretty sure some people had to die for this to happen."
Dude 1: "Well... it's still nice out..."