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Forecast Trajectory Maps for Alaskan 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 run on a regular schedule whether or not there is an eruption

Time help (UTC=GMT; local)
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Updated on Fri Feb 15 03:36:53 GMT 2013

HYSPLIT Forecast Trajectories
Volcano Trajectory start time after model initialization (hrs)
+6 +12 +18 +24
NAM GFS NAM GFS NAM GFS NAM GFS
Cleveland NAM HYSPLIT Trajectories beginning 6 hours after model initial time from the Cleveland Volcano GFS HYSPLIT Trajectories beginning 6 hours after model initial time from the Cleveland Volcano NAM HYSPLIT Trajectories beginning 12 hours after model initial time from the Cleveland Volcano GFS HYSPLIT Trajectories beginning 12 hours after model initial time from the Cleveland Volcano NAM HYSPLIT Trajectories beginning 18 hours after model initial time from the Cleveland Volcano GFS HYSPLIT Trajectories beginning 18 hours after model initial time from the Cleveland Volcano NAM HYSPLIT Trajectories beginning 24 hours after model initial time from the Cleveland Volcano GFS HYSPLIT Trajectories beginning 24 hours after model initial time from the Cleveland Volcano
txt txt txt txt txt txt txt txt
Iliamna NAM HYSPLIT Trajectories beginning 6 hours after model initial time from the Iliamna Volcano GFS HYSPLIT Trajectories beginning 6 hours after model initial time from the Iliamna Volcano NAM HYSPLIT Trajectories beginning 12 hours after model initial time from the Iliamna Volcano GFS HYSPLIT Trajectories beginning 12 hours after model initial time from the Iliamna Volcano NAM HYSPLIT Trajectories beginning 18 hours after model initial time from the Iliamna Volcano GFS HYSPLIT Trajectories beginning 18 hours after model initial time from the Iliamna Volcano NAM HYSPLIT Trajectories beginning 24 hours after model initial time from the Iliamna Volcano GFS HYSPLIT Trajectories beginning 24 hours after model initial time from the Iliamna Volcano
txt txt txt txt txt txt txt txt
Little_Sitkin NAM HYSPLIT Trajectories beginning 6 hours after model initial time from the Little_Sitkin Volcano GFS HYSPLIT Trajectories beginning 6 hours after model initial time from the Little_Sitkin Volcano NAM HYSPLIT Trajectories beginning 12 hours after model initial time from the Little_Sitkin Volcano GFS HYSPLIT Trajectories beginning 12 hours after model initial time from the Little_Sitkin Volcano NAM HYSPLIT Trajectories beginning 18 hours after model initial time from the Little_Sitkin Volcano GFS HYSPLIT Trajectories beginning 18 hours after model initial time from the Little_Sitkin Volcano NAM HYSPLIT Trajectories beginning 24 hours after model initial time from the Little_Sitkin Volcano GFS HYSPLIT Trajectories beginning 24 hours after model initial time from the Little_Sitkin Volcano
txt txt txt txt txt txt txt txt

txt - Trajectory endpoints format help

Forecast Details

Forecast trajectories for Alaska are summarized above. 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) North American Meso (NAM) and the Global Forecast System (GFS) forecast models. Details on the NAM and 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) and displayed in text files (txt).

*Note that the NAM and GFS trajectories are updated separately because the NAM and GFS models are run at different times at NCEP.



Related Links

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

Inquiries should be addressed to:
Barbara Stunder
Email: barbara.stunder@noaa.gov


Modified: December 14, 2012
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