FVXX21 KWBC 142330
.
VOLCANIC ASH ADVISORY STATEMENT
ISSUED 2330 UTC 14 DEC 1999 BY THE WASHINGTON VAAC 
.
TUNGURAHUA 99-248        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...U.S. NUMERICAL MODEL WIND FORECASTS...GEOPHYSICAL
INSTITUTE REPORT AND WIND DATA...
.
ERUPTION DETAILS: CONTINUOUS VENTING OF LIGHT ASH AND
STEAM...OCCASIONAL WEAK TO MODERATE EXPLOSIONS WITH THICKER ASH
.
DETAILS OF ASH: SATELLITE IMAGERY THROUGH 14/2245 UTC SHOWS
EXTENSIVE MULTILAYERED CLOUDINESS WITH SCATTERED SHOWERS AND
THUNDERSTORMS IN THE VICINITY OF THE VOLCANO. THERE IS NO ASH PLUME
DETECTED IN SATELLITE IMAGERY HOWEVER THE LATEST SIGMET FROM
GUAYAQUIL DOES INDICATE ASH TO FL200 OVER THE SUMMIT. HENCE IT IS
BELIEVED THAT THERE MAY BE AT LEAST A SMALL ASH PLUME THAT HAS
EMBEDDED ITSELF WITHIN THE SURROUNDING CLOUD DECKS. CAUTION IS
STRONGLY ADVISED.
.
TRAJECTORY: ASH FROMT THE SUMMIT TO FL200 WOULD MOVE WEST-SOUTHWEST
AT 10 TO 20 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 15/0530 UTC.
.
PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
.
ORRISON
.
NNNN