Investigators must determine why someone in authority didn't order an evacuation soon after the city and Missouri Gas Energy were notified of a gas leak more than an hour before the explosion near Country Club Plaza.
The Missourian's staff is collecting a list of cancellations, updates about the weather and road conditions.
Traffic jams were a problem throughout the day on Interstate 70, U.S. 63 and other roads in the Columbia area.
The National Weather Service updated its snowfall forecast at midday Thursday from an earlier estimate of 4 to 6 inches.
City crews were focused on priority streets until passable before moving into residential areas, Steve Sapp of Columbia Public Works said.
Treacherous conditions caused many cancelations and delays, especially in Kansas and western Missouri. The storm is expected to ease as it goes Illinois and Indiana, which are expected to get about two inches of snow and some sleet.
The locations are open to provide warmth during normal business hours.
Across wide sections of the state, weather conditions dropped visibility to a point that made driving too risky.
The buses are starting with a regular schedule but will switch to an emergency schedule at 10 a.m.
At 6:40 a.m., the storm was generating thunder snow with cloud-to-ground and in-cloud lightning across a broad area from south of Kansas City toward Springfield.
Locals knew JJ's as a prime after-work stop, though it won broader attention after receiving consistently high ratings from contributors to Zagat's restaurant guides.
Tell us about the road conditions where you are and what areas drivers should avoid.