DESCRIPTIVE TEXT NARRATIVE FOR SMOKE/DUST OBSERVED IN SATELLITE IMAGERY
THROUGH 0215Z JULY 20, 2008

SO2 from Okmok Volcano crossing Northern US/Southern Canada:
A dense but narrow plume of SO2 was clearly seen in late evening visible
imagery stretching east from the Pacific across central Washington,
northern Idaho, north-central Montana, central North Dakota, southeast
Manitoba, central Ontario south of James Bay and into central Quebec
before becoming too diffuse to detect in satellite imagery.  The plume
may contain volcanic ash over portions of the US based on PIREPS.

Impact of California Fires:
Moderate to dense smoke stretched northward from the Basin Complex in
Monterey County into northern California, the southern half of Oregon
and extreme northwest Nevada.  An extensive area of light smoke covered
the north-central Rockies, the north-central Plains and the Midwest.


Northwest Territories/Manitoba:
Large area of smoke of various thicknesses covered much of the central
Northwest Territories including portions of Hudson Bay.

Unless otherwise indicated:

Areas of smoke are analyzed using GOES-EAST and GOES-WEST Visible satellite imagery.

Only a general description of areas of smoke or significant smoke plumes will be analyzed.

A quantitative assessment of the density/amount of particulate or the vertical distribution is not included.

Widespread cloudiness may prevent the detection of smoke even from significant fires.