FVXX21 KWBC 031745
.
VOLCANIC ASH ADVISORY STATEMENT
ISSUED 1745 UTC 03 SEPTEMBER 1999 BY THE WASHINGTON VAAC 
.
POPOCATEPETL 99-097 MEXICO 19.02N 98.62W 
.
BACKGROUND:    POPOCATEPETL MEXICO (1401-09)
               SUMMIT HEIGHT 17930 FT (5465 M)
.
SOURCES OF INFORMATION: MEXICO CITY MWO...GOES-8 VISIBLE..INFRARED
AND MULTISPECTRAL IMAGERY..AND CENAPRED VOLCANO CAM.
.
ERUPTION DETAILS: ERUPTION AT 03/1605 UTC.
.
DETAILS OF ASH CLOUD: MULTISPECTRAL IMAGERY AT 03/1702 UTC SHOWS A
WELL DEFINED AREA OF ASH LOCATED APPROXIMATELY 21 KM TO THE SOUTH-SOUTHWEST OF THE SUMMIT.  THIS AREA OF ASH IS 10KM WIDE AND EXTENDS
FROM 19.0N/98.9W TO 18.9N/98.8W.  SINCE UPPER AIR REPORTS ARE NOT
AVAILABLE AT THIS TIME WE ARE RELYING ON MEXICO CITY MWO REPORT THAT
THE ASH IS AT FL350.  ANIMATED SATELLITE IMAGERY WOULD SUGGEST THAT
THIS HEIGHT IS REASONABLE.  FURTHER MORE THE CURRENT VAFTAD RUN FOR
THIS EVENT WILL BE DELAYED DUE TO COMPUTER PROBLEMS AT NCEP.
. 
TRAJECTORY: WEST-SOUTHWEST 20 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 AND VAFTAD.
.
NEXT MESSAGE WILL BE ISSUED AT 03/2345 UTC.   
.
PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
.
NNNN
"Attached Graphic Map Depicting Ash" 

""