Why you saw a halo around the moon last night

There's also a lot of folklore when this happens, as the saying claims a ring around the moon means rain soon.
After the tragedy in Uvalde, TX, schools across the country including Central Indiana made significant upgrades and modifications to their school security.
It’s not a guarantee, but the halo or ring you occasionally observe around the sun or moon could forebode inclement weather.

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A Halo around the moon often means it will rain soon. – Mendonoma

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What makes a halo around the sun or moon?