SPRINGFIELD, Ore. – A possible cold air funnel (similar to a tornado) may have been responsible for damage seen in a Springfield neighborhood Monday afternoon. Damage including downed trees, broken fences, shingles blown off of rooftops, and a greenhouse pulled off its foundation as the storm moved through the neighborhoods between 42nd and 47th streets in Springfield.
There is no official confirmation if it was a cold air funnel or not, but meteorologists from the National Weather Service Forecast Office in Portland tell KEZI 9 News that the storm cell did show signs of rotation while it was moving across the region.
Since our atmosphere is very unstable from the upper level low spinning off the coast and the jet stream to our south, it can create a shear or crossing of the winds within a thunderstorm. Cold air funnels are usually very small, only reaching an EF-0 or low end EF-1 wind speed, but can still create enough swirl to do localized damage.