If ground-based weather recording stations that were once in the middle of undeveloped areas which but now located in the middle of urban areas... there has been no warming trend in the lower 48 states over the last 30 years.
Alaska was showing a cooling trend up until 2012 when they had their “coldest” year since records began. Weather recording stations installed since that time are providing largely anomalous data... gee, I wonder why.
Sorry... typos.
If ground-based weather recording stations that were once in the middle of undeveloped areas but are now in the middle of urban areas... there has been no warming trend in the lower 48 states over the last 30 years.