After that eyes turn to the southwest for what could potentially be another weather-maker for the lower Great Lakes. The low pressure system is now just entering in the southwestern U.S. and as it does it will become cut-off from the main flow in the jet stream. The problem with forecasting this low the past week has been the fact that it has been over a data void Pacific ocean. Other than a few buoys we had no atmosphere sampling of this storm. Now that it has moved onshore, our weather instruments will be able to actually gather data from the system and that's what will be fed into our weather computer models. Early this morning, the 'general track' (and I use that term lightly) has been for the low to move out of east Texas, into Missouri and somewhere through southern Illinois. It's a matter of just how far north or south the low goes that will determine what type of precipitation we will have. A more southern track would mean the chances of getting anything would be slim and a more northern track would increase the chance of receiving rain rather than snow. At this point, it looks like the precipitation may start out as rain Monday afternoon with possibly a rain/snow mixture Monday night. As the low moves into Indiana and Ohio by Tuesday we could see a change over to snow by Tuesday afternoon. The National Weather Service GFS model early this morning had some accumulating snow for Tuesday while the Canadian completely missed us to the south. The devil is in the details and these details will get ironed out within the next 48 hours. Stay tuned!
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