FVXX21 KWBC 212100
.
VOLCANIC ASH ADVISORY STATEMENT
ISSUED 2100 UTC 21 DEC 1999 BY THE WASHINGTON VAAC 
.
TUNGURAHUA 99-276        ECUADOR 1.47S 78.44W 
.
BACKGROUND:    TUNGURAHUA ECUADOR (1502-08)
               SUMMIT HEIGHT 16480 FT (5023 M)
.
SOURCES OF INFORMATION: GOES-8 VISIBLE INFRARED AND MULTISPECTRAL
IMAGERY. AVIATION UPPER AIR SOUNDING FORECAST. SURFACE REPORT FROM
SERB THROUGH GUAYAQUIL MWO
.
ERUPTION DETAILS: OCCASIONAL EMISSIONS OF ASH AND STEAM TO FL220.
.
DETAILS OF ASH: A SINGLE SATELLITE IMAGERY AT 1745 UTC SHOWED A
POSSIBLE LOW LEVEL ASH PLUME MOVING SOUTHWEST. OTHER SATELLITE
IMAGES ARE NOT AVAILABLE.  A SURFACE OBSERVATION FROM SERB AS
REPORTED BY THE GUAYAQUIL REPORTED ASH AT FL220 MOVING SOUTHWEST.
.
TRAJECTORY: ASH AT FL220 WOULD MOVE SW AT 15 KNOTS.
.
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.
.
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 BY 22/0300 UTC.
.
PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
.
NNNN