US Counties map on Gridtracker

Recently the 10m band has had good openings to the USA, and as have Worked All States now looking for contacts into new US Counties.

Discovered the program GridTracker allows you to view maps of different awards, including US Counties.

Here is my map of US counties worked. 626 counties worked, 599 confirmed. Need 2594...

Note the large counties on the West coast, fairly easy to work in VK. The East coast is spotty, places like Florida filling in nicely. I have also completed the 3 counties in Delaware. There is a line in the middle of the USA where I have worked few counties. It runs through North Dakota, South Dakota, Nebraska, Kansas, Oklahoma and Western Texas. This is more to do with a small population density rather than a lack of amateurs. Im guessing a rain shadow from the West Coast mountains blocks rainfall to this area, and not much rain comes across from the East, so hard to farm. A bit like central Australia.

A map of average precipitation shows the same line down the middle of the US. Map from Wikipedia

I get the same pattern looking at US Grids. Some rare ones to look out for.