By now, Coloradans are well-aware of big snow that’s set to roll through the state from Wednesday through Friday. As tends to be the case with snowfall forecasts, they can change quite a bit in days and hours leading up to when the winter weather arrives.

Here’s a look at the current percent chance for up to 18 inches of snowfall in various places around the state, compared to what that percent chance was on Tuesday afternoon, according to the National Weather Service.

Most notably, most places have less of a chance of 18 inches today compared to yesterday, though there has been an uptick in that probability in some spots, including Castle Rock, which tends to be a pain point for I-25 travelers.

A map of the probabilities around the full state from the National Weather Service can be seen at the top of this article, with a comparison to Tuesday’s percent chance found below:

• Aspen: 0 percent chance (no change)
• Bailey: 67 percent chance (-4 percent)
• Boulder: 30 percent chance (-14 percent)
• Castle Rock: 62 percent chance (+5 percent)
• Colorado Springs: 11 percent chance (-14 percent)
• Denver: 10 percent chance (-24 percent)
• Estes Park: 48 percent chance (+5 percent)
• Fort Collins: 5 percent chance (+5 percent)
• Grand Junction: 0 percent chance (no change)
• Pueblo: 0 percent chance (no change)
• Silverton: 28 percent chance (-3 percent)
• Steamboat Springs: 0 percent chance (no chance)
• Walsenburg: 25 percent chance (-15 percent)
• Westcliffe: 38 percent chance (+19 percent)
• Winter Park: 70 percent chance (-20 percent)

The most dangerous day to travel is expected to be Thursday. Travel may become extremely difficult to impossible.

Follow along on the National Weather Service website for the most up-to-date information.