When there's strong enough convection, along with plenty of moisture, a winter storm can produce thundersnow. During a winter storm, snowflakes and sleet pellets high in the clouds can collide.

As pockets of snow work through Western Washington, a few of them have been vigorous enough to produce something very unusual ...

But sometimes it’s a flash high above the surface that really steals the show. Vivid bouts of thundersnow are a rare but beautiful phenomenon that some folks are lucky to experience during the ...

PORTLAND, Ore. (KOIN) — A rare weather event known as “thundersnow” was documented in Astoria on Wednesday. According to the National Weather Service data, a bolt of lightning was recorded ...

PORTLAND, Ore. (KOIN) — Video has surfaced of the rare thundersnow weather picked up on National Weather Service radar in Astoria on Wednesday. The anomaly was captured on a local resident’s ...

Swap out the rain, and replace it with snow, and you have what the National Oceanic and Atmospheric Administration (NOAA) describes as the “rare weather phenomenon” known as thundersnow.

ESSEX COUNTY, N.J. (PIX11) — An unusual weather phenomenon known as thundersnow was reported near Essex County Sunday evening, according to the National Weather Service. The rare weather event ...