FVXX20 KWBC 031330
.
VOLCANIC ASH ADVISORY STATEMENT
ISSUED 1330 UTC 03 DEC 1999 BY THE WASHINGTON VAAC
.
GUAGUA PICHINCHA 99-138         ECUADOR 0.17S 78.60W 
.
BACKGROUND:    GUAGUA PICHINCHA ECUADOR (1502-02)
               SUMMIT HEIGHT    15695 FT (4784 M)  
.
SOURCES OF INFORMATION: THE GEOPHYSICAL INSTITUTE IN ECUADOR.
GOES-8 VISIBLE..INFRARED AND MULTISPECTRAL IMAGERY.  U.S. NUMERICAL
MODEL WIND FORECAST.
.
ERUPTION DETAILS: LARGE ERUPTION AT 03/0300 UTC.
.
DETAILS OF ASH CLOUD: ASH IS NO LONGER VISIBLE ON THE CURRENT
SATELLITE IMAGERY THROUGH 03/1315 UTC. 
.
TRAJECTORY: UPPER AIR PATTERNS BASED ON NUMERICAL GUIDANCE SUGGEST
ANY REMAINING ASH AT FL360 WOULD CONTINUE TO MOVE TO THE WEST AT
5 KNOTS WHILE ANY REMAINING ASH AT FL250 WOULD CONTINUE TO MOVE TO
THE SOUTHWEST AT 5 TO 10 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 AND VAFTAD.
.
WALTER/NOAA/NESDIS/SAB
.
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 ISSUED WILL BE A WATCH STATEMENT DATED 04/1700.
.
PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
.
NNNN