We are projecting a clipper system to come down from Canada and put down potentially significant snows, as well as some icy conditions.
The clipper will be coming down quickly, so the system in itself will be a quick one-two punch before moving out. However, despite its quickness, the system will be able to put down potentially over 6 inches in some spots. The map says isolated 10-14 inches, but this was biased off of the 12z GFS as the ECMWF is dramatically different. We like to stick with trends.
What is clear, however, is the chance for ice. We have inserted the potential for a tenth of an inch of ice in Central Ohio, Central Indiana and North Illinois. We have low confidence in ice amounts, so this is a general 'first step' for the ice forecasts.
This system will be sampled thursday into friday, meaning that will be the first time that the models have actual upper air data to work with, therefore improving their accuracy of their forecasts, as well as ours.
**Something that may happen is the potential for phasing of this clipper and another system coming from the south. If this is to happen, we may see drastically different results than this map. We will keep a close eye on this situation**
By the way, this is the introduction of our new winter weather accumulation forecast map.
EDIT: We looked back and found the ECMWF to have similar snowfalls as depicted on our graphic. Sorry for the wrong information.