Particulate air quality remained in the moderate range today over the east, as we experience yet another late August-like day with high temperatures near 80F in the DC metro area. The Lancaster, Pennsylvania, and Wilmington, Delaware monitors reached the code orange range range at 4 pm (left). The location of the haziness over the northeast and parts of the midatlantic region can also be seen in today's MODIS AOD retrieval (right). The haze is faintly visible in the MODIS true color imagery. One central California monitor also reached the orange range earlier in the day.