Friday August 18, 2006

THROUGH 1530Z August 18, 2006.

The cluster of large fires burning in the Okanogan National Forest
in north central Washington state were continuing to emit a large
quantity of moderately dense to locally dense smoke which was spreading
in both a northward direction into southern British Columbia Province
of southwestern Canada and southeastward across eastern Washington and
the Idaho panhandle. Some of the thinner leftover smoke may also exist
along the Columbia River Basin and possibly even west of the Cascades in
the Seattle region. Other fires located especially over Clackamas County
of northwestern Oregon and around the Linn/Deschutes/Lane County border
region of west central Oregon were actively producing moderately dense
smoke this morning which appeared to be moving north into the Portland
metro area.

Northern California:
Large fires in Siskiyou and Trinity Counties of northern California are
producing a moderately dense to locally dense batch of smoke that is
primarily spreading westward across western Siskiyou, northern Trinity,
and northern Humboldt Counties.

The very large fires burning in central Elko County of northeastern
Nevada are responsible for an elongated swath of mainly thin to perhaps
moderately dense smoke this morning which extended from northeastern
Nevada across southeastern Idaho and northern Utah(over the northern
Great Salt Lake) and over central Wyoming. Some of the residual smoke
may also be present farther to the east over the Dakotas and the Upper
Mississippi Valley/western Great Lakes region, but widespread cloudiness
is preventing detection from satellite imagery.

A thin stripe of possibly leftover detached smoke from the western
US fires(primarily the northeastern Nevada fires) was detected in the
relatively cloud free region of southwestern and south central Nebraska
as well as northwestern Kansas.

Similar to yesterday morning, satellite imagery showed a narrow but long
smoke plume originating from the fire in Atoka County of southeastern
Oklahoma and spreading to the north-northwest just west of the Tulsa
metro area. The first few visible images this morning also showed
possible smoke in a region stretching from western Arkansas/eastern
Oklahoma southwestward across the Dallas metro area to central Texas
potentially even south of the Waco region. This area of possible smoke
was likely due to contributions from the Atoka Oklahoma County fire as
well as from several other smoke producing fires over eastern Texas,
Arkansas, and Louisiana yesterday.

Southeastern Texas/Louisiana to the Southern and Central Appalachians:
Very early morning GOES-West imagery along with GOES-East imagery
indicated a hazy airmass across a large region stretching from
southeastern Texas and Louisiana to the central and southern Appalachians
around eastern Kentucky, eastern Tennessee, and northern Georgia. A large
ridge aloft present over this region was likely assisting in trapping
any pollutants which are present. There is the possibility that some
remnant smoke could be present in this region but the overall contribution
(if any) would appear to be rather minor.



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.