FVXX21 KWBC 040430
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VOLCANIC ASH ADVISORY
ISSUED 0430 UTC 04 NOVEMBER 1999 BY THE WASHINGTON VAAC 
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TUNGURAHUA 99-071      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 INFRARED AND MULTISPECTRAL
IMAGERY...GUAYAQUIL METEOROLOGICAL WATCH OFFICE...BULLETIN AND WIND
DATA FROM THE INSTITUTO GEOFISICO IN ECUADOR...AVIATION MODEL WIND
FORECAST DATA FROM THE U.S. NATIONAL WEATHER SERVICE.
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ERUPTION DETAILS: ASH EMISSIONS AND INTERMITTENT EXPLOSIONS.  THE
INSTITUTO GEOFISICO REPORTS THAT ON NOVEMBER 3 THERE WAS THE SAME
TYPE OF SEISMIC ACTIVITY AS THEY HAD BEEN RECORDING IN RECENT DAYS.
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DETAILS OF ASH: NO ASH CAN CURRENTLY BE DETECTED IN SATELLITE
IMAGERY AT 04/0345 UTC.  HOWEVER AT ABOUT 0115 UTC SATELLITE IMAGERY
SHOWED A SMALL FAINT AREA OF ASH NEAR THE VOLCANO SUMMIT.  THIS ASH
WAS AT ABOUT FL280 AND IT MOVED TOWARD THE SOUTH SOUTHWEST IN
SUBSEQUENT IMAGERY BEFORE BECOMING TOO DIFFUSE TO OBSERVE AT 0245
UTC. 
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TRAJECTORY: UPPER AIR PATTERNS AND THE ASH MOVEMENT OBSERVED BETWEEN
0115 AND 0245 UTC SUGGEST THAT ASH BETWEEN FL240 AND FL300 WILL MOVE
TOWARD THE SOUTH SOUTHWEST AT 10 KNOTS. 
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REAL TIME SATELLITE IMAGERY ALONG WITH THIS AND OTHER VOLCANIC ASH
ADVISORY STATEMENTS OFTEN ACCOMPANIED BY A MAP DEPICTING ASH
LOCATION ARE AVAILABLE AT INTERNET URL ADDRESS  
http://www.ssd.noaa.gov/VAAC/washington.html
(all lower case except /VAAC/)
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OUTLOOK:  SEE SIGMETS AND VAFTAD.
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THE NEXT STATEMENT WILL BE ISSUED BY 04/1030 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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