FVXX20 KWBC 201400
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VOLCANIC ASH ADVISORY STATEMENT-WATCH 
ISSUED 1400 UTC 20 FEB 1999 BY THE WASHINGTON VAAC
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COLIMA  99-012  MEXICO    19.51N 103.62W 
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BACKGROUND:    COLIMA MEXICO (1401-04)
               SUMMIT HEIGHT 13451 FT (4100 M)

SOURCES OF INFORMATION: GOES8 VISIBLE INFRARED SHORTWAVE AND
MULTISPECTRAL IMAGERY.

ERUPTION DETAILS: POSSIBLE NEAR SUMMIT ACTIVITY

DETAILS OF ASH CLOUD: GOES8 SATELLITE IMAGERY THROUGH 1345 UTC DOES
NOT SHOW ANY ASH CLOUD ALTHOUGH A HOT SPOT IS OCCASIONALLY SEEN IN
SHORTWAVE IMAGERY. THE MEXICO CITY MWO HAS CANCELED THEIR SIGMET AND
COLIMA SURFACE OBSERVATIONS HAVE NOT REPORTED ANY ERUPTIVE ACTIVITY 
RECENTLY. WE ARE ENDING THIS EVENT AND PLACING THE VOLCANO IN A WATCH
STATUS.
      
THE COLIMA VOLCANO OBSERVATORY REPORTS THAT THE VOLCANO REMAINS
UNSTABLE WITH THE POTENTIAL TO PRODUCE AN ERUPTION CLOUD WITH LITTLE
OR NO WARNING.  
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WE WILL CONTINUE TO MONITOR THE AREA AND IF THERE IS AN ASH CLOUD
OBSERVED OR REPORTED AT ANY ALTITUDE A VOLCANIC ASH ADVISORY
STATEMENT WARNING WILL BE ISSUED AS SOON AS POSSIBLE.  
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THE WATCH VAAS IS ISSUED ONLY FOR SEISMICALLY MONITORED VOLCANOES AND
BASED ON INFORMATION RECEIVED FROM THE GEOLOGICAL COMMUNITY.  A WATCH
VAAS WILL BE ISSUED DAILY WHEN INFORMATION IS RECEIVED TO INDICATE
THAT A VOLCANO IS RESTLESS AND HAS THE POTENTIAL FOR AN EXPLOSIVE
ERUPTION WITH LITTLE OR NO WARNING. NON-EXPLOSIVE LOW LEVEL AND NEAR
SUMMIT ACTIVITY MAY BE OCCURRING AT PRESENT.
SEE NOAA-ARL HOMEPAGE FOR TEST-VAFTAD AT:
HTTP://WWW.ARL.NOAA.GOV/VAFTAD.HTML (ALL LOWER CASE)
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THE NEXT WATCH STATEMENT WILL BE ISSUED AROUND 21/1400 UTC. 
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