Somebody pressed the pause button for the upper atmosphere. Over the next 5 days, an upper level low is going to get lost from the regular flow of the jet stream. And no one is in a hurry to look for him. Check this out




This is an upper air model for 8pm tomorrow night. Basically, this measures the vorticity or spin in the upper part of our atmosphere. Notice the big dip and vorticity max (denoted in yellow) over the Great Lakes.









This is the same parameter only 24 hours later at 8pm on Saturday night. Nothing has moved! That big white circle over the Atlantic is a strong high pressure system blocking any forward movement of the storm. Meanwhile, look up into Canada. Those closely packed together line represent the jet stream, which is WAY too far North for late September. And there is our storm, still lost and cut off from the party.

And finally, here is Sunday at 8pm. The storm has actually retrograded back to the west! This actually helps us dry out a little bit since this move backwards takes us out of the moist Gulf flow that will cause showers on Friday and Saturday. In this image, the storm has actually become even more isolated or lost. Someone needs to pick this bastard up and take him out to sea.





Bottom line, this is a very strong blocking pattern. When things get this backed up, it takes a big change to get things moving again. That won't happen until at least Tuesday. So expect clouds, showers and humidity from now until then. It won't rain all of the time, but it also won't be dry all of the time. Sunday does look like the driest day but I wouldn't expect much in the way of sunshine. Yuck!