Cold air funnel clouds are possible in the relatively cold, unstable air mass in place over the Ohio valley today, along with isolated heavy downpours, small hail and an isolated severe storm. Cold air funnel clouds are relatively weak rotations that develop in a relatively cold air mass. They are weaker than normal funnel clouds and rarely reach the ground. However, it is something to be aware of today since they can occasionally reach the ground and cause damage. Cold air funnels occurred Sunday in Indiana.