FVXX20 KWBC 071100
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 0500 UTC 07 AUGUST 1999 BY THE WASHINGTON VAAC 
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CERRO NEGRO 99-004    NICARAGUA      12.5N 86.7W
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BACKGROUND:    CERRO NEGRO  NICARAGUA  (1404-07)
               SUMMIT HEIGHT 2214 FT (675M)
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SOURCES OF INFORMATION: NEWS MEDIA REPORTS AND GOES-8 SATELLITE
IMAGERY AND INETER IN MANAGUA NICARAGUA. 00 UTC AVIATION MODEL DATA
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ERUPTION DETAILS: ERUPTIONS HAVE BEEN OCCURRING SINCE 05/1600 UTC.
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DETAILS OF ASH CLOUD: NO ASH IS VISIBLE IN CURRENT SATELLITE IMAGERY
THROUGH 07/1015 UTC. A HOT SPOT WAS OCCASIONALLY DISCERNIBLE IN GOES
8 NEAR-INFRARED IMAGERY EARLIER IN THE EVENING.  THERE IS CURRENTLY
THICK METEOROLOGICAL CLOUDS IN THE AREA OF THE VOLCANO. INFORMATION
FROM INETER SUGGESTS THAT THIS IS PRIMARILY A LAVA EVENT.  HOWEVER
MEDIA REPORTS INDICATE THAT YESTERDAY PILOTS NOTED THE PRESENCE OF
ASH AT FL220.
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TRAJECTORY: AVIATION MODEL DATA FROM 07/00 UTC INDICATES ANY ASH AT
SUMMIT LEVEL WOULD MOVE TOWARD THE WEST AT AROUND 10KT. ANY ASH AT
FL220 WOULD MOVE TOWARD THE NORTHWEST AT 10-15 KTS.
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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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THE NEXT MESSAGE WILL BE ISSUED AROUND 07/1700 UTC. 
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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