As noted on previous days, there are some major fires burning in Northern Canada. Colin Seftor at NASA GSFC sent along an OMPS Aerosol Index showing a thick plume to the east of Great Slave Lake in Nunavut. Rene Servranckx sent images of fires burning in the north of Quebec and today a major fire has blown smoke from a fire further north in Quebec across Hudson's Bay (still with lots of ice floating in it) towards the west. Below there is also the HMS track of the smoke outlined by the NOAA analysts.
Above on the right, the AIRNOW AQI loop for PM2.5 today shows a persistant band of moderate aerosol locked in over the Great Lakes and in the area of the upper St. Lawrence River.
Update: June 29 11:00 EDT
The PM2.5 levels decreased over the Great Lakes today but increased in Texas and reached code orange (Unhealthy for Sensitive Groups) in Slidell, Louisiana. Ozone dominated the Code Orange levels in the Los Angeles basin and the AQI reached 129 in San Bernadino.
Fires continue to blow up in Canada and this afternoon a new fire was identified in northern New Mexico. In the southeast, a tropical depression is forming and it might become Tropical Storm or Hurricane Arthur. The week forecast shows that the system will track parallel to the eastern seaboard. This will provide significant blocking to the normal west to east flow so we can expect stagnation in the Great Lakes and midwest to arise, bringing the possibility of increasing pollution.Posted by Ray Hoff at June 28, 2014 9:35 PM