FVXX20 KWBC 292325 COR
.
VOLCANIC ASH ADVISORY STATEMENT
ISSUED 2325 UTC 29 NOV 1999 BY THE WASHINGTON VAAC 
.....CORRECTION TO ADD ASH BOUNDRIES.....
.
GUAGUA PICHINCHA 99-128      ECUADOR 0.17S 78.60W 
.
BACKGROUND:    GUAGUA PICHINCHA ECUADOR (1502-02)
               SUMMIT HEIGHT    15695 FT (4784 M)  
.
SOURCES OF INFORMATION: THE GEOFISICO INSTITUTO IN ECUADOR...GOES 8
VISIBLE AND INFRARED AND MULTISPECTRAL IMAGERY. UPPER LEVEL WINDS
MODEL AND PILOT REPORT CONTAINED IN GUAYAQUIL SIGMET.
.
ERUPTION DETAILS: ERUPTION AT 29/1640 UTC..
.
DETAILS OF ASH CLOUD: IN THE LAST VISIBLE IMAGERY OF THE DAY THE ASH
CLOUD CAN STILL BE SEEN SPREADING SOUTH FROM THE VOLCANO. AT 29/2215
UTC THE LEADING EDGE OF THE ASH IS NOW 192 KM (104 NMI) FROM THE
VOLCANO AND IS ROUGHLY 177 KM (96 NMI) WIDE AND IS BOUNDED BY POINTS
0.17S 79.3W  1.88S 79.3W  1.85S 77.7W  0.17S 77.7W. THE WESTERN EDGE
OF THE ASH IS OBSCURED BY METEOROLOGICAL CLOUD. THE ASH IS MOVING
SOUTH AROUND 20 KNOTS AND BASED ON A PILOT REPORT IS ESTIMATED BELOW
FL300.  
.
TRAJECTORY: ACCORDING TO UPPER AIR MODEL PATTERNS THE VOLCANIC ASH
FROM FL150 TO FL300 WILL MOVE WESTWARD AT 15 KTS. ASH FROM FL300 TO
FL450 WILL MOVE SOUTHWARD AT 10 KTS. THIS DATA IS QUESTIONABLE BASED
ON OBSERVATIONS FROM ECUADOR. 
.
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/)
.
OUTLOOK:  SEE SIGMETS AND VAFTAD
.
THE NEXT STATEMENT WILL BE ISSUED AT 30/0500 UTC.
.
PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
.
NNNN"Attached Graphic Map Depicting Ash" 

"Graphic Map Depicting Ash"