St. Louis, Missouri – A turn toward colder-than-normal weather during the Jan 20–24 period is increasing concern for winter weather across much of Missouri, particularly if precipitation moves through while colder air is established. While significant snow is not guaranteed, the evolving pattern raises the risk for snow or ice in multiple parts of the state.
According to the National Weather Service Climate Prediction Center, Missouri carries a 50–60% probability of below-normal temperatures during the January 20–24 window. Precipitation probabilities remain above normal at 40–50%, a combination that supports wintry precipitation potential when temperatures dip toward or below freezing, especially overnight.
In St. Louis and eastern Missouri, daytime temperatures may hover near seasonal levels but are expected to drop below freezing at night. That setup could allow rain to transition to snow or a wintry mix if systems pass through during colder periods. Central Missouri, including Columbia, Jefferson City, and areas along I-70, faces a higher likelihood of snow sticking due to colder ground temperatures. Northern Missouri may see more persistent cold, increasing the chance of accumulating snow, while southern Missouri could experience fluctuating precipitation types depending on storm timing.
Major travel corridors such as I-70, I-44, I-55, U.S. 60, and U.S. 63 could become slick during wintry precipitation, particularly overnight and during early morning travel. Cold pavement temperatures may allow snow or ice to linger on untreated roads, bridges, and overpasses, increasing the risk of hazardous conditions.
Residents are encouraged to prepare ahead of the Jan 20–24 window by checking heating systems, insulating exposed pipes, and ensuring vehicles are winter-ready. While significant snow is not guaranteed, the evolving pattern supports the possibility of at least one impactful winter weather event across Missouri.
This colder pattern is expected to persist through late week, and additional winter weather advisories or alerts may be issued as confidence in timing and impacts increases.
