WSUS33 KKCI 280955 SIGW MKCW WST 280955 CONVECTIVE SIGMET 27W VALID UNTIL 1155Z NV FROM 50NNE BTY-50ENE BTY-20E BTY-30N BTY-50NNE BTY AREA TS MOV FROM 20030KT. TOPS TO FL290. CONVECTIVE SIGMET 28W VALID UNTIL 1155Z MT FROM 60WNW HVR-40NNW GTF-40ESE FCA-50SSW YQL-60WNW HVR AREA TS MOV FROM 18025KT. TOPS TO FL380. OUTLOOK VALID 281155-281555 FROM 40SSE YQL-50NNW GGW-BAM-BTY-EHF-SNS-FOT-40SSE YDC-40SSE YQL WST ISSUANCES POSS. REFER TO MOST RECENT ACUS01 KWNS FROM STORM PREDICTION CENTER FOR SYNOPSIS AND METEOROLOGICAL DETAILS.