| Fine particulate matter has accumulated in
the surface layer over the past several days and leaves Oklahoma with
moderate air quality today. A polar
and nocturnal thermal inversion traps the particulate matter near the
surface. Sunshine will warm the
surface and increase vertical mixing, and southerly winds will bring somewhat
cleaner and less cold air to parts of the state. Meanwhile, prescribed fires may resume and
produce locally unhealthy smoke.
Otherwise, good air quality will return gradually. |