FVXX20 KWBC 210145
VOLCANIC ASH ADVISORY
ISSUED: 2000DEC21/0145Z  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: 2000/203
                                                              
INFORMATION SOURCE: GOES-8  INFRARED AND MULTISPECTRAL
IMAGERY.  POPOCATEPETL CAM. 12Z UPPER AIR DATA FROM MEXICO
CITY. 
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ERUPTION DETAILS: INTERMITTENT EMISSIONS OF MOSTLY STEAM
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DETAILS OF ASH CLOUD: THE POPOCATEPETL REMOTE CAMERA HAS SHOWN
OCCASIONAL EMISSIONS OF MOSTLY STEAM DURING THE DAYLIGHT HOURS
TODAY. SATELLITE IMAGERY THROUGH 0115Z SHOWS THAT THE LARGE
AREA OF ASH BELOW FL240 TO THE SOUTH OF THE VOLCANO HAS BECOME
TOO DISPERSED TO OBSERVE.  EARLIER IMAGERY INDICATED SOME ASH
REMAINING IN THE VICINITY 0F 1742N 9742W OR 170KM (90NMI)
SOUTH SOUTHWEST OF THE SUMMIT.
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A WELL DEFINED BAND ASH ESTIMATED AT FL320 350 KM (185NMI)
LONG AND 65KM (35NMI) WIDE EXTENDS FROM THE POINT 1934N 8947W
TO 2037N 8635W.  MOVEMENT IS EAST NORTHEAST AT 30KT.  MUCH
THINNER ASH EXTENDS UP TO 300KM (165 NMI) TO THE NORTHWEST OF
THIS BAND.

TRAJECTORY: ASH AT FL320 IS MOVING EAST NORTHEAST AT 30KT. ANY
REMAINING ASH BELOW FL240 IS FORECASTED TO MOVE SOUTH TO
SOUTHWEST AT LESS THAN 10 KT,

OUTLOOK: SEE SIGMETS AND VAFTAD.


THE NEXT MESSAGE WILL BE ISSUED BY 21/0800Z.
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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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