FVXX21 KWBC 041735
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 1735 UTC 04 APR 1999 BY THE WASHINGTON VAAC
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POPOCATEPETL 99-062    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: GOES-8 VISIBLE AND MULTISPECTRAL IMAGERY.
1200 UTC MEXICO CITY SOUNDING. CENAPRED REPORT. 
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ERUPTION DETAILS: ERUPTION AROUND 04/0823UTC.
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DETAILS OF ASH CLOUD: ASH CAN NO LONGER BE DETECTED IN GOES-8  MULTI-SPECTRAL IMAGERY THROUGH 1645 UTC.  THE SMALL NORTHERN PORTION OF THE
EVER DISSIPATING CLOUD AROUND FL240 LASTED THE LONGEST MOVING TO THE
AREA AROUND 20.5N 96.2W BEFORE BEING OBSCURED BY HIGH LEVEL CLOUDS
AROUND 1615 UTC. THERE CONTINUES TO BE SOME SMALL NEAR SUMMIT GAS
EVENTS HOWEVER NO ASH HAS BEEN DETECTED IN IMAGERY. 
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TRAJECTORY: ANY ASH STILL OUT THERE FROM THE NORTHERN PORTION OF THE
CLOUD IS MOVING NORTHEAST AROUND 30 KNOTS UNDER THE HIGH
METEOROLOGICAL CLOUDS.
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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 VAFTAD.
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THE NEXT MESSAGE FOR THIS EVENT WILL BE ISSUED BY 04/2330 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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