FVXX20 KWBC 151500
VOLCANIC ASH ADVISORY
ISSUED: 2000DEC15/1500Z  VAAC: WASHINGTON
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VOLCANO: POPOCATEPETL 1401-09
LOCATION: 1901N 9837W    AREA: MEXICO
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SUMMIT ELEVATION: 17930 FT (5465 M)
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ADVISORY NUMBER: 2000/179
                                                              
INFORMATION SOURCE: GOES-8 VISIBLE ... INFRARED AND
MULTISPECTRAL IMAGERY. 1200Z MEXICO CITY UPPER AIR SOUNDINGS.
MEXICO CITY MWO
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ERUPTION DETAILS: CONTINUING ASH EMISSIONS 
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DETAILS OF ASH CLOUD: GOES8 IMAGERY THROUGH 1345Z SHOWS A
LARGE AREA OF ASH WITH SOME NEW THICKER ASH NEAR THE SUMMIT. 
THIS THICK ASH IS 79 KM (43 NMI) LONG FROM 1855N 9827W TO
1850N 9912W AND IS 44 KM (24NMI) WIDE AND IS ESTIMATED TO BE
UP TO FL290.  SURROUNDING THIS AREA IS AN AREA OF THINNER ASH
ROUGHLY BOUNDED BY POINTS 1905N 9834W TO 1754N 9814W TO 1714N
9851W TO 1720N 9901W TO 1740N 9901W TO 1804N 9848W TO 1832N
9854W TO 1840N 9922W TO 1905N 9932W TO 1920N 9913W AND 1923N
9855W.  THIS ASH IS ESTIMATED TO BE BETWEEN FL250 AND FL290.
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THE DISPERSING AREA OF ASH WEST OF THE VOLCANO IS 144 KM (78
NMI) LONG EXTENDING FROM 1832N 10013W TO 1735N 10108W AND IS
50 KM (27 NMI) WIDE AT THE WIDEST POINT.  THIS ASH WAS
ESTIMATED AT FL220.
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TRAJECTORY: ASH UP TO FL250 WOULD MOVE SW AT ABOUT 5 KTS ASH
BETWEEN FL250 AND FL29O WOULD MOVE SOUTH AT ABOUT 10 KTS.
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OUTLOOK: SEE SIGMETS AND VAFTAD.
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THE NEXT MESSAGE WILL BE ISSUED BY 15/2100Z.
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REAL TIME SATELLITE IMAGERY AND VOLCANIC ASH ADVISORIES OFTEN
ACCOMPANIED BY A MAP DEPICTING ASH LOCATION ARE AVAILABLE AT
INTERNET URL ADDRESS
HTTP://WWW.SSD.NOAA.GOV/VAAC/WASHINGTON.HTML
(ALL LOWER CASE EXCEPT /VAAC/)
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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NNNN"Attached Graphic Map Depicting Ash" 

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