U.S. Trajectory Forecasts

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U.S. Trajectory Forecasts

• NOAA ARL produces daily trajectory forecasts for
  certain parts of the country and selected
  locations to support air quality forecasting and
  the AIRMoN deposition network program.
• Forward and backward trajectories are produced 4
  times per day using the NAM forecast data and
  made available via the ARL READY website.
• 36h backward trajectories start at 21 UTC (4pm
  EST) today and tomorrow at 10, 500, 1500 and 1000
  m agl.
• 18 h forward trajectories start at 11 UTC (6am
  EST) today and tomorrow at 10, 500, 1500 and 1000
  m agl.

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Trajectory Model
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Click on a colored region or choose a location
from the drop down menus or links.
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Model update time.
Forward or Backward.
Start day.
Start height above model ground level.
Graphic or trajectory endpoints file.
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18 h Forward Trajectories
36 h Backward Trajectories
Starting locations are identified as black stars.
Colors are used to group trajectories from the
same starting state or province. Small boxes are
plotted along the each trajectory at 6, 12 and 18
UTC and a large box is plotted at 00 UTC.