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WSRS31 RURD 291420

URRV SIGMET 3 VALID 291430/291630 URRR-
URRV ROSTOV-NA-DONU FIR SEV TURB FCST S OF LINE N4900 E04652 - N5017
E04203 AND N OF LINE N4642 E03727 - N4228 E04656 - N4256 E04930
SFC/FL150 STNR NC=