FVXX21 KWBC 041507
VOLCANIC ASH ADVISORY
ISSUED: 2003OCT04/1510Z VAAC: WASHINGTON
 
VOLCANO: MASAYA  1404-10
LOCATION: N1159W08610    AREA: NICARAGUA
                              
SUMMIT ELEVATION: 2083 FT (635 M)

ADVISORY NUMBER: 2003/001

INFORMATION SOURCE: GOES-12 IMAGERY. GFS MODEL WINDS
FORECAST.  UNITED AIRLINES WEATHER DISPATCH - PILOT
REPORT.

ERUPTION DETAILS: PLUME OF STEAM/ASH STARTED AT 04/1245Z.
 
OBS ASH DATE/TIME: 04/1445Z
 
OBS ASH CLOUD: SFC/FL150 3 NM WIDE LINE BETWEEN
N1159W08610 N1206W08620. ASH IS MOVING NW 5-10 KNOTS.

FCST ASH CLOUD +6H: SEE SIGMETS.
 
REMARKS: UNITED WEATHER DISPATCH RELAYED A PILOT REPORT
OF AN ERUPTION TO FL150 AT 1331Z WHILE FLYING OFF THE
COAST OF NICARAGUA.  VISIBLE SATELLITE IMAGERY SHOWED A
WHITE PLUME EMANATING FROM THE LOCATION OF MASAYA
VOLCANO.  MULTI-SPECTRAL TECHNIQUES DID NOT SHOW ANY
INDICATIONS OF ASH...INDICATING THE PLUME MAY BE MOSTLY
STEAM AND GAS...BUT CANNOT RULE OUT THE POSSIBILITY OF
ASH WITHIN THE PLUME. WILL CONTINUE TO MONITOR AND
UPDATE AS MORE INFORMATION BECOMES AVAILABLE...GALLINA 

NEXT ADVISORY: WILL BE ISSUED BY 2003OCT04/2100Z.

             
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"Attached Graphic Map Depicting Ash Only" 

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