FVXX21 KWBC 171530
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VOLCANIC ASH ADVISORY STATEMENT                              
ISSUED 1530 UTC 17 FEB 1999 BY THE WASHINGTON VAAC
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POPOCATEPETL 99-005 MEXICO  19.02N 98.62W
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BACKGROUND:    POPOCATEPETL MEXICO (1401-09)
               SUMMIT HEIGHT 17930 FT (5465 M)
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SOURCES OF INFORMATION: SIGMET FROM MEXICO CITY METEOROLOGICAL WATCH
OFFICE, CENAPRED, 1200 UTC SOUNDING FROM VERACRUZ, MEXICO..GOES 8
VISIBLE...INFRARED...AND MULTISPECTRAL IMAGERY.
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ERUPTION DETAILS: EXHALATION AT 17/1448 UTC TO FL210.
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DETAILS OF ASH CLOUD: THE METEOROLOGICAL WATCH OFFICE IN MEXICO CITY
REPORTS AN EXHALATION OF POPO TO FL210. A PILOT REPORT IN THE AREA
SHOWS THE WINDS AT FL200 MOVING TOWARDS THE EAST AT 25KTS.  LATEST
GOES8 IMAGERY DOES NOT SHOW ANY ASH AT THIS TIME BUT SHORTWAVE
IMAGERY SHOWS A HOT SPOT OVER THE VOLCANO
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TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH THAT IS PRESENT
BETWEEN FL170 AND FL210 WILL MOVE TO THE EAST AT 25 TO 35 KTS.
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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 SENT AT 17/2130 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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