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WSUY31 SUMU 281420

SUEO SIGMET 4 VALID 281420/281620 SUMU-
SUEO MONTEVIDEO FIR EMBD TS FCST WI S3136 W05801 - S3156 W05704 - S3321 W05719 - S3320 W05823 - S3136 W05801 TOP FL360 MOV E 05KT NC=