WSMX31 MMMX 100058 MMEX SIGMET A1 VALID 100057/100457 MMMX- MMFR MEXICO FIR EMBD TS OBS AT 0057Z WI N2006W09826 - N1953W09841 - N1928W09838 - N1928W09803 - N1917W09804 - N1908W09740 - N1936W09732 - N1934W09751 - N2008W09753 CB TOP ABV FL420 MOV NE 05KT WKN. =