Although it is never a smart decision to enter actively volcanic locations, it is even less smart to go near a volcanic lake without prior knowledge about the lake’s de-gassing. These areas are generally heavily regulated by local conservationists and park rangers, so you will never truly be in danger, just close to it.
Lines of Clouds
These lines are called “inflow bands,” which are quite literally channels of high-intensity weather that allow storm clouds to travel faster. These inflow bands are also indicators of impending tornadoes, and they usually stretch to the southern side of the storm and finish in the south-east, which is generally where most violent weather comes from in America.