818 FPUS66 KPDT 061458 AFDPDT NORTHEAST OREGON/SOUTHEAST WASHINGTON FORECAST DISCUSSION NATIONAL WEATHER SERVICE PENDLETON OR 800 AM PDT WED AUG 6 1997 12Z MFR SNDG MAKES CNVCTN LUK RATHER UNLIKELY TDA AS VERY WARM ALOFT WITH SW FLOW OVR PDT CWA. HOWEVER WITH UPR TROF AXIS PASSING SO CLOSE AND MDLS INDICATING INSTABILITY THIS AFTN WL LEAVE MENTN OF TSTMS IN MTNS ZONE AND ALONG FTHLLS...BUT WILL REMOVE MENTN FROM LWR BSN. ALSO 24HCHG CHRT SHOWING TEMPS IN COL BSN SAME OR SLIGHTLY WARMER THAN YSTRDA SO WL BUMP UP TEMPS IN MRNG UPDATE. STONESIFER PDT 1000 ALW 1000 PSC 0000 YKM -000 .KPDT...OTS. .KPDT...NONE.