FVXX20 KWBC 110310
VOLCANIC ASH ADVISORY
ISSUED: 2001DEC11/0310Z   VAAC: WASHINGTON
.
VOLCANO: POPOCATEPETL 1401-09
LOCATION: 1901N 9837W    AREA: MEXICO
.                             
SUMMIT ELEVATION: 17930 FT (5465 M) 
.
ADVISORY NUMBER: 2001/104
.
INFORMATION SOURCE: SIGMET FROM THE MEXICO CITY
METEOROLOGICAL WATCH OFFICE..GOES-8 INFRARED AND
MULTISPECTRAL IMAGERY. MEXICO CITY 00Z SOUNDING.
.
ERUPTION DETAILS: ASH OVER THE VOLCANO OBSERVED AT 11/0158Z.
.
DETAILS OF ASH CLOUD: ASH WAS OBSERVED OVER THE VOLCANO AT
0158Z EXTENDING 5NM ENE OF THE VOLCANO BETWEEN FL170 TO
FL200.  NO ASH CAN BE DETECTED IN SATELLITE IMAGERY. 
HOTSPOT ACTIVITY BEGAN ABOUT 0115Z AND HAS CONTINUED THROUGH
THE CURRENT 0245Z IMAGE.  THE VOLCANO IS OBSCURED BY THIN
HIGH CLOUDS.
.
TRAJECTORY: UPPER AIR PATTERNS SUGGESTS THAT ANY ASH BETWEEN
THE SUMMIT AND FL210 WOULD MOVE TO THE EAST NORTHEAST AT
ABOUT 25 KNOTS.
.
OUTLOOK:  SEE SIGMETS.
.
NEXT ADVISORY: WILL BE ISSUED BY 2001DEC11/0900Z
.
NNNN