If I ever learned of a "Turn Down" by another Operator I almost invariably said "No!".
I preferred to start from the default position of "No" then let the weather, etc.....argue me into saying "Yes".
The decision is easy when it is clear cut....good weather or bad weather....it is the in-between stuff that will kill you.
I will bet there were significant presence of snow showers in the area with some reporting sites showing marginal weather.