We've noticed temps @ BWI have been running high, and we think we may have found the culprit. Using imagery from @Maxar's Earthwatch, we see a new building/pavement to the south of the ASOS in 2019 vs 2018. This land cover change may have a warming effect especially w/ a S wind. pic.twitter.com/NCcm2q3vl2

— Maxar | WeatherDesk (@Maxar_Weather) September 13, 2019