Saturday August 26, 2006

THROUGH 1500Z August 26, 2006

The large fires in Okanogan County of Washington are still emitting large
quantities of smoke. Analysis of visible satellite imagery this morning
shows the most dense smoke confined to north central Washington while
somewhat thinner smoke has spread southwestward across western Washington
(just east of Seattle) and over western Oregon (including Portland)
to southwestern Oregon (just west of Medford).

Circulation around a large low pressure system located near the border
region of Idaho/Wyoming/Utah has wrapped at least some of the smoke
produced by the western US fires southeastward over eastern Oregon,
southern Idaho, and northern and eastern Nevada, then eastward across
northern Utah to southern Wyoming. However, cloudiness and the very thin
nature of the smoke is making detection difficult especially over Utah
and Wyoming.

Large area from Eastern Washington to the Upper Mississippi Valley:
A large swath of mainly thin to possibly locally moderately dense smoke
was visible extending from eastern Washington across the Idaho panhandle
and much of Montana to the Northern Plains and Upper Mississippi Valley
including the Dakotas, Minnesota, Iowa, and northern Nebraska. It is
possibly that the smoke also covers a larger area than this especially on
the southern and eastern portions of the area but widespread cloudiness
is preventing additional detection.

Fires in Siskiyou and Trinity counties in California continued to produce
locally dense smoke traveling westward during the morning hours, which
has covered the whole northwestern corner of California.



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.