- tornadoes . . .
- lightning . . .
- storms . . .
- clouds . . .
- northern lights . . .
- rainbows . . .
- abstracts . . .
- A long horizontal cloud base appears, a squall line along the horizon
watermarked image
- W003658Z
- Squall line coming, 2 of 4; see W003695Z next. A long horizontal cloud base appears along the horizon. Rain falls behind it while dark clouds continue to thicken ahead of it. Air blowing toward the axis accumulates (convergence) and rises to compensate, condensing as a thick cloud sheet and producing rain later when it is further lifted over the boundary.
- +