FVXX22 KWBC 040830
VOLCANIC ASH ADVISORY STATEMENT
ISSUED 0830 UTC 04 DEC 1999 BY THE WASHINGTON VAAC 
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SAN CRISTOBAL  99-012   NICARAGUA  12.7N 87.0W 
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BACKGROUND:      SAN CRISTOBAL  NICARAGUA  (1404-02)
                 SUMMIT HEIGHT 5725 FT  (1745 M)
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SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL
IMAGERY...0000 UTC AVIATION MODEL UPPER-AIR SOUNDING DATA
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ERUPTION DETAILS: ASH AND STEAM VENTING...BEGINNING AROUND 1630 UTC
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DETAILS OF ASH CLOUD: SATELLITE IMAGERY THROUGH 04/0745 UTC SHOWS NO
ASH SIGNATURES BUT EARLIER THE PLUME WAS ONLY OBSERVABLE IN VISIBLE
IMAGERY
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TRAJECTORY: WEST AT 10 TO 15 KNOTS.
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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  
www.ssd.noaa.gov/VAAC/washington.html
(all lower case except /VAAC/)
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OUTLOOK:  SEE LATEST SIGMETS.
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....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 
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THE NEXT STATEMENT WILL BE ISSUED BY 04/1430 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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