Issued: 12am on Thursday, January 1st 1970
Technical Forecast Discussion
Short term (Wednesday 9/26 through Saturday 9/29)
The cold frontal boundary will be to the southeast of the area on this evening. The combination of the trough and dry air behind the cold frontal boundary will result in both pushing moisture out of the region heading into Thursday with dry, cool air replacing it. Skies should continue to clear through the late evening. CAA will be prevalent this evening as lows drop to the high 50s. Drier air will be in the region early Thursday, but moisture will still exist as mid level southwesterly flow continues to advect moisture from the Gulf of Mexico region. This is also evident as the stationary front will be located along the moisture advection. This will continue the near overcast conditions that the area has been experiencing, but showers are not likely as high pressure will sit over the eastern portion of the Great Lakes and upper level flow will be largely zonal as the trough moves out and another approaches. Another cold front approaches on Friday. The propagation of moisture from the last front will result in this front having much less moisture to work with, making it weaker. Showers are not likely and conditions should clear as another wave of cold, dry air moves through the region, creating fair conditions on Saturday.
Long term (Sunday 9/30 through Tuesday 10/2)
Some weak CAA looks to exist on Saturday from the previous cold front as temperatures will go into the mid to high 60s during the day. The air should stay relatively dry, but the moisture advection from the gulf will slowly propagate northward mid-Sunday. Upper level flow will be zonal through Sunday which will not make for ideal conditions for precipitation, but a isolated storm or two cannot be ruled out as humidity will be present at peak heating time. Upper level ridging develops on Monday that will push most of the moisture northward letting Monday be a clear and dry day. A warm front looks to move through late Monday. On Tuesday, lingering moisture will bring a chance for showers and a few storms.