What Is A Snow Squall Warning Mean 2025. Snow squall watches and warnings are in effect, with locally heavy accumulations up to 60 cm possible by the time all is said and done. A snow squall warning is a “polygon” warning, similar to severe thunderstorm/tornado warning.

A snow squall warning works the same way as severe thunderstorm warnings and is issued for areas ahead of the squall. The des moines metro experienced their first snow squall warning in october of 2020.