FVXX21 KNES 251756 VA ADVISORY DTG: 20170925/1756Z VAAC: WASHINGTON VOLCANO: TURRIALBA 345070 PSN: N1001 W08346 AREA: COSTA_RICA SUMMIT ELEV: 10958 FT (3340 M) ADVISORY NR: 2017/255 INFO SOURCE: GOES-EAST. NON-OPERATIONAL GOES-16. NWP MODELS. VOLCANO WEB CAMERA. OVSICORI-UNA. ERUPTION DETAILS: EMS REPORTED AT 24/1712Z OBS VA DTG: 24/1730Z OBS VA CLD: VA NOT IDENTIFIABLE FROM SATELLITE DATA WINDS SFC/FL130 090/10-15KT FCST VA CLD +6HR: 24/2330Z FCST VA CLD +12HR: 25/0530Z FCST VA CLD +18HR: 25/1130Z RMK: NO VA IS OBSERVED IN IMAGERY OR WEBCAM ALTHOUGH THERE ARE EXTENSIVE WX CLOUDS PRESENT. OBSICORI-UNA REPORTED EMS AT 24/1712Z TO 300M ABOVE CRATER. ...SCHWARTZ NXT ADVISORY: WILL BE ISSUED BY 20170926/0000Z