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WSRS31 RURD 171816

URRV SIGMET 6 VALID 171830/172030 URRR-
URRV ROSTOV-NA-DONU FIR EMBD TS FCST S OF LINE N4241 E03719 - N4429
E03830 - N4431 E04133 - N4310 E04137 TOP FL350 STNR INTSF=