- Clouds are thickening and lowering as a strong squall line approaches
- W021011Z
- A strong squall line is on the way. Clouds are thickening and lowering, until a dark line appears along the horizon and approaches quickly. This is the system's gust front, the leading edge of cooler outflow air just ahead of the rain. Warm air feeds into the storms above the surface along the axis and ahead of it, maintaining them by forward propagation.
-
+