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TUNGURAHUA 99-059 ECUADOR 1.47S 78.44W
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BACKGROUND: TUNGURAHUA ECUADOR (1502-08)
SUMMIT HEIGHT 16480 FT (5023 M)
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SOURCES OF INFORMATION: GOES-8 VISIBLE..INFRARED AND MULTISPECTRAL
IMAGERY...NATIONAL WEATHER SERVICE NUMERICAL WEATHER PREDICTION
MODELS...GUAYAQUIL METEOROLOGICAL WATCH OFFICE.
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ERUPTION DETAILS...EXPLOSIVE ERUPTION OF THE VOLCANO SEEN IN
SATELLITE IMAGERY AT ABOUT 1245 UTC
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DETAILS OF ASH: SATELLITE IMAGERY INDICATED AN ERUPTION INITIALLY AT
ABOUT 1245 UTC. SUBSEQUENT VISIBLE AND INFRARED IMAGERY DEPICTS A
NARROW ASH PLUME SPREADING TO THE WEST. THE HEIGHT OF THE ASH IS
ESTIMATED AT FL350 BASED ON AIRCRAFT REPORTS RELAYED BY THE
GUAYAQUIL METEOROLOGICAL WATCH OFFICE AND NUMERICAL WEATHER
PREDICTION MODEL WIND FORECASTS. AT 1415 UTC THE ASH CLOUD EXTENDS
45 KM (24 NMI) TO THE WEST OF THE SUMMIT TO 1.5S 78.8W AND IS 12 KM
(7 NMI) WIDE.
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