FVXX23 KWBC 211530
VOLCANIC ASH ADVISORY STATEMENT-CORRECTION TIME OF NEXT STATEMENT
ISSUED 1530 UTC 21 JAN 2000 BY THE WASHINGTON VAAC 
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MASAYA 00-003         NICARAGUA  1159N 8610W
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BACKGROUND:    MASAYA NICARAGUA (1404-10)
               SUMMIT HEIGHT 2083 FT (635 M)
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SOURCES OF INFORMATION:  GOES-8 VISIBLE..INFRARED...AND
MULTISPECTRAL IMAGERY...0600 UTC AVIATION MODEL FORECAST SOUNDING
DATA...GEOPHYSICAL LAB IN MANAGUA...
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ERUPTION DETAILS: CONTINUOUS LIGHT EMISSIONS OF GASES AND POSSIBLE
ASH...
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DETAILS OF ASH CLOUD: GOES-8 SATELLITE IMAGERY THROUGH 1445 UTC IS
SUGGESTING THAT A PLUME OF GASES AND POSSIBLY ASH IS LEAVING THE
MASAYA SUMMIT. THE PLUME IS NOTED TO BE LOW-LEVEL AND IS ESTIMATED
TO BE AS HIGH AS ONLY FL030. COORDINATION WITH THE GEOPHYSICAL LAB
IN MANAGUA HAS VERIFIED AN INCREASE IN SEISMIC ACTIVITY OVER THE
LAST FEW DAYS WHICH WOULD SUPPORT INCREASED VOLCANIC ACTIVITY.
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AT 21/1445 UTC THE PLUME EXTENDS 223 KM (120 NMI) FROM THE SUMMIT TO
THE POINT 1048N8749W. IT IS 37 KM (20 NMI) WIDE.


TRAJECTORY: SOUTHWEST AT 15 KNOTS...
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OUTLOOK:  SEE LATEST SIGMETS.
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THE NEXT STATEMENT WILL BE ISSUED BY 21/2130 UTC.
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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/)
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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ORRISON/CLARK/NOAA/NESDIS/SAB
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