Forecast trajectories for the Southeast U.S. and vicinity are summarized
above. The 36-h duration backward trajectories begin at 21 UTC (4 pm EST)
today and tomorrow at heights of 10 m, 500 m, 1000 m, and 1500 m above model
ground level. The 18-h duration forward trajectories begin at 11 UTC (6 am
EST) today and tomorrow at heights of 10 m, 500 m, 1000 m, and 1500 m above
model ground level. The trajectories are computed using meteorological
fields output from the NOAA National
Centers for Environmental Prediction (NCEP) North American Mesoscale
(NAM) forecast model. Model output from the latest 00, 06, 12 or 18 UTC NAM
forecast are first used in the trajectory calculation, then, if necessary
for the backward trajectories, short-term (up to 12 hours) NAM forecasts
from previous run(s) are used. Details on the 12 km NAM gridded data used
in these calculations are available on the forecast
meteorology web page. Maps do not give the NAM model forecast
initialization time if only short-term forecasts are used in the
calculations. Trajectories in different states are shown in different
colors. The trajectory endpoints are plotted on maps (gif) and displayed in
text files (txt).
