May 19, 2014

Scattered Code Yellow Air Quality throughout United States; Dust in Dakotas

Code Yellow PM2.5 levels were recorded today across the Pacific Northwest, Central Plains, Southeast and Great Lakes states (top left). The worst PM2.5 conditions were observed near 6AM in Southern California, near the border of Baja California. In terms of smoke/aerosol layers, the HMS analysis team suggest satellites indicate an elongated plume of mixed aerosols (smoke/dust/sulfates) across southern Manitoba and Ontario with at least partial origin from agricultural fires burning in Saskatchewan and Manitoba provinces. In addition, remnant dust is reported in east North Dakota and northeast South Dakota, likely originating as the result of high wind gusts in Montana (top right). Due to cloud cover in this region, it's difficult to distinguish elevated aerosol optical depth (AOD) in this region, however there is slight raised AOD further south, across Nebraska/Kansas (bottom left). The NAAPS Total Optical Depth model output provides corroborating evidence of dust, forecasting moderate levels in the Dakotas to remain through tomorrow (bottom right).

Posted by Alexandra St Pe at May 19, 2014 2:54 PM
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