FVXX20 KWBC 232130 VOLCANIC ASH ADVISORY STATEMENT ISSUED 2130 UTC 23 MAY 2000 BY THE WASHINGTON VAAC . POPOCATEPETL 00-025 MEXICO 1901N 9837W . BACKGROUND: POPOCATEPETL MEXICO (1401-09) SUMMIT HEIGHT 17930 FT (5465 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE..INFRARED AND MULTISPECTRAL IMAGERY. MEXICO CITY METEOROLOGICAL WATCH OFFICE. CENAPRED VOLCANO CAM. MEXICO CITY UPPER AIR SOUNDING. 12 HOUR WIND FORECAST FROM THE 23/1200 UTC AVIATION MODEL. . ERUPTION DETAILS: ERUPTION AT 23/1430 UTC AND A MODERATE EXHALATION AT 23/1910 UTC. . DETAILS OF ASH CLOUD: NO ASH CAN BE SEEN IN SATELLITE IMAGERY THROUGH 23/2045 UTC DUE TO THE DENSE WEATHER CLOUDS COVERING THE AREA. SHORTLY AFTER THE 1430 UTC ERUPTION A SMALL ASH PLUME AT ABOUT FL320 WAS OBSERVED MOVING TO THE NORTHWEST BUT THE AREA IS NOW TOO CLOUDY TO VIEW THIS ASH. AT 1910 UTC AN EXHALATION WAS REPORTED AND OBSERVERS ON THE GROUND BELIEVE IT PRODUCED A SMALL AMOUNT OF ASH BUT AGAIN CLOUDS PREVENTED SATELLITE DETECTION AND THE HEIGHT OF THIS ASH IS UNKNOWN. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH BETWEEN THE SUMMIT AND FL320 WOULD MOVE TOWARD THE WEST AT LESS THAN 10 KNOTS. . OUTLOOK: SEE SIGMETS AND VAFTAD . THE NEXT STATEMENT WILL BE ISSUED BY 24/0330 UTC. . 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/) . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN