Measurable snow likely Wednesday Night through Thursday afternoon. A Winter Storm Watch has been issued for parts of the area southeast of St. Louis. This could have a high impact on the Thursday morning drive.
The current forecast has snow moving back in from the south Wednesday night (after midnight for the Metro). Snow is likely for the morning commute through midday, then snow shifts east and tapers off Thursday afternoon.
With the current track of the low pressure system that will bring snow, the best chance for the highest accumulation starts around the St. Louis Metro and gets higher as you travel the southeast. Lower accumulation is expected to the northwest. See the map below for current snowfall potential.
Any shift in the storm track can cause big changes to that accumulation map. If the track shifts farther south or east, we would see snow chances go down and lower totals around the St. Louis Metro.
If the track shifts farther north or west, then we would see snow chances increase and higher totals shift back into the Metro area.
A second variable is temperatures on Thursday. We will all start the day in the 20s. As we move through Thursday morning into Thursday afternoon, some areas could see temperatures climb above freezing. This could cause rain to mix in with snow. Any rain mixing with snow will lower snowfall totals.
There is still time for the storm track to change and uncertainty in Thursday's temperatures. Just a heads up that we could see more accumulating snow and the potential for a high impact on your Thursday morning drive. We encourage you to stay tuned as we make forecast adjustments.