FVXX21 KWBC 220900
.
VOLCANIC ASH ADVISORY STATEMENT
ISSUED 0900 UTC 22 DEC 1999 BY THE WASHINGTON VAAC 
.
TUNGURAHUA 99-278        ECUADOR 1.47S 78.44W 
.
BACKGROUND:    TUNGURAHUA ECUADOR (1502-08)
               SUMMIT HEIGHT 16480 FT (5023 M)
.
SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY.
GEOPHYSICAL INSTITUTE REPORT AND AVIATION MODEL WIND DATA. 
.
ERUPTION DETAILS: ALMOST CONTINUAL STEAM EMISSIONS WITH OCCASIONAL
PULSES OF ASH.
.
DETAILS OF ASH: THERE ARE SCATTERED MULTI-LAYERED CLOUDS OVER THE
REGION MAKING DETECTION OF ANY ASH DIFFICULT IN NIGHT TIME IMAGERY.
NO ASH WAS DETECTED ON CURRENT SATELLITE IMAGERY THROUGH 22/0815
UTC.
.
TRAJECTORY: ANY ASH BELOW FL250 WOULD MOVE TOWARD THE WEST TO
SOUTHWEST AT 10 TO 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 22/1500 UTC.
.
PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
.
NNNN