- Lake-effect showers in unstable air
- W895205Z
- A very cold, unstable air mass in autumn has caused strong lake-effect showers to move inland. This one is a single squall of mixed precipitation (graupel, rain, and snow) which looks just like a Cumulonimbus cloud. It has no lightning so it is (by strict definition) a Cumulus Congestus convective shower with a frozen anvil top at about 5km height.
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