FVXX20 KWBC 222030
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 2030 UTC 22 FEB 1999 BY THE WASHINGTON VAAC
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COLIMA 99-016  MEXICO 19.51N 103.62W
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BACKGROUND:    COLIMA MEXICO (1401-04)
               SUMMIT HEIGHT 13451 FT (4100 M)
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SOURCES OF INFORMATION: SURFACE OBSERVATION FROM COLIMA (MMIA).
GOES-8 VISIBLE INFRARED AND MULTISPECTRAL IMAGERY. MWO MEXICO CITY.
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ERUPTION DETAILS: AROUND 22/1845 UTC
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DETAILS OF ASH CLOUD: THE ERUPTION CLOUD HAS BEEN INVESTIGATED
FURTHER BY THE MWO IN MEXICO CITY AND FOUND TO BE COMPRISED OF
MOSTLY STEAM. THERE WAS A SLIGHT DETECTION OF ASH IN MULTISPECTRAL
IMAGERY SHORTLY AFTER THE ERUPTION TO THE EAST NORTHEAST AROUND 23
KM (12 NMI) HOWEVER IT FADED WITHIN 45 MINUETS AND IS NO LONGER
DETECTABLE. THERE CONTINUES TO BE A HOTSPOT SIGNATURE AT THE VOLCANO
HOWEVER AT 2002 UTC NO ERUPTION CLOUD COULD BE DETECTED AND THE
SURFACE OBSERVATION FROM COLIMA NOW ONLY REPORTS SOME STEAM COMING
FROM THE VOLCANO.  THERE IS ALSO A LAYER OF HIGH LEVEL CLOUDS MOVING
OVER THE AREA FROM THE WEST.
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TRAJECTORY: FROM GOES SATELLITE DERIVED WINDS ANY ASH SHOULD MOVE TO
THE NORTHEAST TO EAST FROM FL140 TO FL250 AT 20 TO 35 KNOTS.
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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/messages.html
(all lower case except /VAAC/)
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OUTLOOK: SEE SIGMETS.
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THE NEXT MESSAGE WILL BE ISSUED BY 23/0200 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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