Well that clears things up... :)
A digging upper level trough will move quickly east across the western half of the United States. The trough will deepen in response to
amplifying ridge along the West Coast by Monday night. The positively tilted trough will rotate a potent positive vorticity maximum through
the middle Mississippi Valley region by Monday causing cyclogenesis to occur over Texas. The surface low will then track northeast through
the Ohio Valley Monday night. The warm sector will remain to the south of the forecast area and ample moisture will stream north with the
system Monday morning from southwest to northeast. A mix of rain/snow will take place across the area Monday into Monday night.
850 mb temperatures are expected to fall from around -6 degrees C to around -10 degrees C by Sunday morning. As the next system
approaches Monday morning, mid level temperatures will warm back to just above freezing across the southern half of the forecast area.
Will need to monitor temperatures through the column for the possibility for freezing precipitation in the overrunning precipitation threat.
As low moves northeast of the area Monday night, cold air advection returns in the mid levels as 850 mb temperatures drop back to around -6 degrees C.