A California low is moving across the southwest and will be pushing into the southern Rockies Wednesday into Thursday, bringing snow to the Rocky Mountain region.

Flights landing Saturday night at Denver International Airport unwittingly helped trigger the formation of ice crystals in a cloud layer just above the ground, producing a bit of snow — though it was mostly light and did not accumulate.

After a dry December, Denver is back on track for average snowfall totals thanks to a frigid and frosty January.

Thursday is a Pinpoint Weather Alert Day as there is still uncertainty around the track of the storm.