- Blue green color in storm clouds, rain core
- W930718S
- Warm air to the left is separated from a blue-green rain core at right by a low, foggy cloud line with rising air along it. Below it a lowering begins to take shape. The blue or green color in the rain curtain was natural and, contrary to popular notions, does not imply the presence of hail. Instead, it is the natural consequence of filtering of white skylight (from above) through a deep layer of cloudy air near storm clouds.
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