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Forecast Trajectory Maps for Volcanoes

NOTE: this web server is not maintained in an "operational" environment and should not be relied upon for 24/7 access.

NOTE: these trajectories are from https://nomads.ncep.noaa.gov/pub/data/nccf/com/hysplit/prod/traj.YYYYMMDD

Time help (UTC=GMT; local)
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Updated on Thu Apr 18 16:30:02 UTC 2024

HYSPLIT Forecast Trajectories
Volcano Trajectory start time after model initialization (hrs)
+6 +12 +18 +24
GFS GFS GFS GFS
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txt - Trajectory endpoints format help

Forecast Details

Forecast trajectories summarized above come from https://nomads.ncep.noaa.gov/pub/data/nccf/com/hysplit/prod/traj.YYYYMMDD. The 6-h duration forward trajectories begin at the specified number of hours after the start of the meteorological model initialization. The trajectories are computed using meteorological fields output from the NOAA National Centers for Environmental Prediction (NCEP) Global Forecast System (GFS) forecast model. Details on the GFS gridded data used in these calculations are available on the meteorological forecast data web page. Trajectories starting at different heights are shown in different colors. The trajectory endpoints are plotted on maps (gif), displayed in text files (txt), and can be viewed in Google Earth.

These are not official forecasts for an eruption and do not show ash fall.




Related Links

Anchorage Volcanic Ash Advisory Center (VAAC)
Washington Volcanic Ash Advisory Center (VAAC)
Alaska Volcano Observatory (AVO)
Hawaiian Volcano Observatory (HVO)
HYSPLIT for current eruptions
HYSPLIT for hypothetical eruptions
Run HYSPLIT for any volcano

Inquiries should be addressed to:
Alice Crawford
Email: alice.crawford@noaa.gov



Modified: April 26, 2021
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