Out of sensitivity to the impending natural disaster, the campaigns have suspended fundraising in some of states with potential to feel the effects.
They've also re-arranged their schedules, opting not to be seen stumping as the storm strikes.
Here's a schedule of what is (and is not) happening in Colorado this week:
Craig Romney: Mitt Romney's son is campaigning in Longmont and Denver.
Jill Biden: The wife of Vice President Joe Biden campaigns in Colorado Springs and Fort Collins.
Barack Obama: (CANCELED) The President was planning a speech in Colorado Springs.
Paul Ryan: (CANCELED) Mitt Romney's running mate was planning three events in Greeley, Castle Rock, and Canon City.
Bill Clinton: The former President is scheduled to give speeches on behalf of Barack Obama in Denver and Aurora.
Barack Obama: The President is scheduled to make a campaign stop in Boulder as part of a three-state swing, but the campaign cautions that "travel is subject to change due to weather conditions."
Mitt Romney: The GOP nominee is expected to hold a campaign rally at Comfort Dental Amphitheater in Greenwood Village. The venue can hold 18,000 people.