FVXX20 KWBC 131800
VOLCANIC ASH ADVISORY
ISSUED: 2001AUG13/1800Z   VAAC: WASHINGTON
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VOLCANO: TUNGURAHUA  1502-08
LOCATION: 0128S 7826W    AREA: ECUADOR
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SUMMIT ELEVATION: 16480 FT (5023 M)
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ADVISORY NUMBER: 2001/167
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INFORMATION SOURCE: GOES-8 VISIBLE/INFRARED/MULTISPECTRAL IMAGERY.
13/1200Z UPPER WINDS FORECAST FROM THE 13/0600Z AVIATION MODEL.
SIGMETS FROM GUAYAQUIL MET WATCH OFFICE.
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ERUPTION DETAILS: CONTINUOUS ERUPTION SINCE 06/1203Z. NEW EMISSIONS
OBSERVED AT 13/1130Z AND 13/1700Z.
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DETAILS OF ASH CLOUD:  SATELLITE IMAGERY THROUGH 1715Z INDICATES TWO
DISTINCT AREAS OF ASH. THE FIRST AREA IS THIN AND IS A RESULT OF THE
1130Z ERUPTION. THIS ASH IS LOCATED ALONG A LINE 156 KM (84 NMI) LONG
AND 65 KM (35 NMI) WIDE FROM 0019S7821W TO 0140S7754W. THIS ASH IS
ESTIMATED TO BE BETWEEN FL350 AND FL400 BASED ON PILOT REPORTS AND
UPPER AIR FORECAST WINDS. 
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THE SECOND AREA OF THICK ASH IS A RESULT OF THE NEW 1700Z ERUPTION.
THIS ASH IS LOCATED OVER THE VOLCANO AND IS BOUND BY POINTS
0115S7826W...0127S7819W...0136S7837W. THIS ASH IS OBSERVED UP TO
FL350 BY AIRCRAFT.
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TRAJECTORY: UPPER AIR PATTERNS SUGGEST ASH ABOVE FL250 TO BE MOVING
NORTHEAST AT 10 TO 15 KNOTS. ASH ABOVE FL350 WILL BE MOVING NORTH
NORTHEAST AT 15 KNOTS. ASH FROM SUMMIT LEVEL TO FL250 WILL BE MOVING
WEST SOUTHWEST AT 5 TO 10 KNOTS. 
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OUTLOOK: SEE SIGMETS AND VAFTAD.
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THE NEXT ADVISORY WILL BE ISSUED BY 14/0000Z.
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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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HUGHES
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NNNN"Attached Graphic Map Depicting Ash Only" 

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