PUFF: A Lagrangian Trajectory Volcanic Ash Tracking Model Cleveland Volcano Feb 19 2001


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Feb 19 2001
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PUFF simulation of the Feb 19 eruption of Cleveland Volcano

These images show the puff simulation of Cleveland Volcano, February 19 2001 using available NWS wind fields, specifically the "Aviation model" (grid 203(J), 190.5 km resolution) forecast data. The diffusivity constant was lowered from the default value to 5000 m^2/sec. Ash was initialized in a linear column from 0 to 42000 feet so that all levels are represented. After comparison to the GOES10 imagery, it is apparent that levels between 18000 to 36000 feet coincide with visible (split-window technique) ash.

More information on the eruption and ash cloud can be found at the Alaska Volcano Observatory. Thanks to Dave Schneider and Kevin Engle for the satellite imagery.

GOES10 Split Window 4 minus 5 images with PUFF overlay:
Feb 19 16:00 (+01:00) Feb 19 17:00 (+02:00) Feb 19 18:00 (+03:00) Feb 19 19:00 (+04:00) Feb 19 20:00 (+05:00)
Feb 19 21:00 (+06:00) Feb 19 22:00 (+07:00) Feb 19 23:00 (+08:00) Feb 20 02:00 (+11:00) Feb 20 03:00 (+12:00)
Feb 20 04:00 (+13:00) Feb 20 05:00 (+14:00) Feb 20 06:00 (+15:00) Feb 20 07:00 (+16:00) Feb 20 08:00 (+17:00)
Feb 20 09:00 (+18:00) Feb 20 10:00 (+19:00) Feb 20 11:00 (+20:00) Feb 20 12:00 (+21:00) Feb 20 13:00 (+22:00)
Feb 20 14:00 (+23:00) Feb 20 15:00 (+24:00) Feb 20 16:00 (+25:00) Feb 20 17:00 (+26:00) Feb 20 18:00 (+27:00)
Feb 20 19:00 (+28:00) Feb 20 21:00 (+30:00) Feb 20 22:00 (+31:00) Feb 20 23:00 (+32:00) Feb 21 00:00 (+33:00)
Feb 21 01:00 (+34:00) Feb 21 02:00 (+35:00) Feb 21 03:00 (+36:00) Feb 21 04:00 (+37:00) Feb 21 05:00 (+38:00)
Feb 21 06:00 (+39:00) Feb 21 07:00 (+40:00) Feb 21 08:00 (+41:00) Feb 21 09:00 (+42:00) Feb 21 10:00 (+43:00)
Feb 21 11:00 (+44:00) Feb 21 12:00 (+45:00) Feb 21 13:00 (+46:00) Feb 21 14:00 (+47:00) Feb 21 15:00 (+48:00)

Animated Gif (appx 8M)


Craig Searcy, National Weather Service, Anchorage Forecast Office
Last modified: Fri Jun 15 10:25:43 AKDT 2001
craig.searcy@noaa.gov