Wednesday, July 20, 2005

THRU 0300Z JULY 21, 2005

Northwestern Canada:
Satetllite data does not show quite as many fires burning between Great
Bear Lake and Great Slave Lake in the Northwest Territories as seen in
recent days. However, visible imagery still depicts an enormous batch of
smoke lingering across western Canada. Trends in visible imagery through
this evening show the smoke spreading southeastward and now extending
from northern British Columbia Province across northern Saskatchewan
Province. What appears to be detatched patches of the smoke along the
leading edge of this area have moved as far as central Manitoba Province
(around Lake Winnipeg) and western Ontario Province.

Western U.S.:
Big flare ups have occurred this evening with a couple fires over east
central Idaho and southwestern Montana. Rapidly growing dense smoke
plumes were spreading off to the northeast as seen in evening visible
imagery. Other smaller fires across eastern Washington, eastern Oregon,
the Idaho Panhandle, and western Montana were contributing to a general
haze across the region. To the south a tremendous expanse of smoke has
been noted during the past several days over the Southwest due to quite
a few large fires burning over the region. This smoke which currently
stretches from California and Arizona to western Nebraska has been trapped
somewhat under a large ridge. During the day and into the evening GOES
visible imagery has indicated smoke most likley coming from the large
central Arizona fires has moved westward into southern California and
recently northward into central California as it rounds the back side
of the ridge.


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.