Continued Smoke through Central U.S.
The smoke that has been over the Great Lakes,
Mississippi Valley, and Plains States over the
past several days is still there, as seen on
HMS imagery, below left. This has resulted in
the elevated AOD
seen in the MODIS
shown below right.
Other wildfires burning in Nevada have spread
smoke from Nevada through Utah, Wyoming, and
parts of South Dakota, Nebraska, and Colorado.
The EPA AirNow AQI
loop below indicates
that the smoke may have affected ground-level
air quality, with Moderate AQIs in a swath from
the southern Plains through the Mississippi Valley
and Great Lakes into the Mid-Atlantic. There is
another area of Moderate AQIs in the Pacific Northwest,
and northern Rocky Mountains States reaching into
British Columbia where a brief spot of AQI
for Sensitive Groups flares up mid-afternoon that
may be caused by the fires in Washington over the
past week. Lidar
observations at UMBC
show a cloud capped boundary layer, extending up to 2 km, in the early observations. Smoke aloft, as indicated in the HMS smoke product, was observed as well extending up to 5 km.
The fires and smoke seen in Arizona in the HMS
imagery above led to poor visibility in the
Grand Canyon, as seen in the NPS webcam image
below left. For comparison, images on clear and
hazy days are shown below right.
Posted by John Sullivan at July 22, 2014 9:29 PM