Why do hail clouds look green

Gallagher claimed that hail cannot possibly produce the green sky, but the size of the drops dictate the exact shade of green. Namely, smaller larger drops lead to a blue-green yellow-green sky. In fact, it's possible, according to Gallagher, that all thunderstorms have some greenish tint at some time in their life cycle, but that they're not often seen at the time. There is no correlation between green skies and tornadoes, but The Weather Channel severe weather expert Dr.

Greg Forbes has had two prior experiences with "green sky tornadoes". I've seen others that had a turquoise tint that didn't have reported severe weather. We would love to see your photos of green skies.

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Using this explanation green clouds are likely when thunderstorm with heavy rain are strongly illuminated from behind by reddish sunlight, such as at sunset.

The high water content of the cloud absorbs red light, resulting in a green colouration. The studies model also predicts that the colour will be blue-green for larger rain drops, and yellow-green for smaller. This explanation does not require hail in the cloud. However it does require a very high water content which may only occur in thunderstorms which are likely to also produce hail.

Thus in SE Queensland it may be that storms that produce hail also appear to have green clouds, but the colour is coincidental and not due to the hail. Gallagher III - 22 October Storm cloud with a blue colour and blowing dust with a strong down draft. Responses to a posting on green clouds on an atmospheric optics email list.