The cloud was reported by control tower personnel at 1:18 p.m. and likely disappeared soon after, National Weather Service spokesman Steve Anderson said.
"They're very short-lived," he said. "They last a matter of minutes."
The clouds are funnels of cold air that protrude a few hundred feet below the base of the parent cloud and rotate or spin like a top, according to the National Weather Service.
They are rarely associated with winds strong enough to do any damage.
Anderson said those who see a funnel cloud should take shelter in a sturdy structure if the cloud is directly over them.