FVXX22 KWBC 072052 VOLCANIC ASH ADVISORY STATEMENT ISSUED 2052 UTC 07 DEC 1999 BY THE WASHINGTON VAAC . POPOCATEPETL 99-109 MEXICO 19.02N 98.62W . BACKGROUND: POPOCATEPETL MEXICO (1401-09) SUMMIT HEIGHT 17930 FT (5465 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE..INFRARED AND MULTISPECTRAL IMAGERY. POPO CAM. 1200 UTC MEXICO CITY UPPER AIR SOUNDING. . ERUPTION DETAILS: PUFF OF ASH AND STEAM 07/1355 UTC. . DETAILS OF ASH CLOUD: SATELLITE IMAGERY THROUGH 2015 UTC CURRENTLY SHOWS NO ASH VISIBLE. MULTISPECTRAL IMAGERY DOES INDICATE A POSSIBLE HOT SPOT ASSOCIATED WITH THE VOLCANO. BOTH POPO CAM AND SATELLITE IMAGERY SHOW SCATTERED CUMULUS CLOUDS SURROUNDING THE SUMMIT. . TRAJECTORY: ASH BETWEEN FL200 AND FL220 WOULD MOVE EAST NORTHEAST AT 10 TO 15 KTS. . 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 www.ssd.noaa.gov/VAAC/washington.html (all lower case except /VAAC/) . OUTLOOK: SEE LATEST SIGMETS. . EFFECTIVE JANUARY 3 2000 AT 0000 UTC... ALL REFERENCES TO LATITUDE AND LONGITUDE IN VOLCANIC ASH ADVISORY STATEMENTS WILL BE IN DEGREES AND MINUTES OF A DEGREE. EXAMPLE: 16.70N 62.20W WILL BE 1642N6212W . THE NEXT STATEMENT WILL BE ISSUED AROUND 08/0300 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN