St. Louis, Missouri – Scattered rain and snow showers are expected to develop across northeast Missouri and west central Illinois Friday afternoon, with precipitation changing to snow as an Arctic front moves through the region.
According to the National Weather Service in St. Louis, precipitation will begin mainly as rain before transitioning to snow later in the afternoon and evening. While widespread travel impacts are not expected, there is a risk for brief bursts of heavier snow, particularly where showers repeatedly move over the same areas.
These heavier snow bursts may produce reduced visibility, isolated slick spots, and localized accumulations up to one-half inch, especially during the evening hours. Gusty winds accompanying the showers could further reduce visibility for short periods.
The timing of the changeover to snow varies by location. Snow is expected to begin between noon and 2 p.m. across far northeast Missouri, spreading southeast through the afternoon, reaching the St. Louis metro area between 4 p.m. and 6 p.m., and moving into southeast Missouri and southwest Illinois between 6 p.m. and 8 p.m.
Although accumulations are expected to remain limited, untreated roads, bridges, and overpasses could become slick during brief heavier snow showers. Conditions may vary significantly over short distances as showers remain scattered and fast-moving.
Drivers are advised to remain alert for rapidly changing conditions during the late afternoon and evening commute, particularly during periods of reduced visibility.
For commuters and evening travelers, even short-lived snow bursts may cause brief slowdowns on area roadways.
