FTOS31 LOWM 170800 TAF LOWW 170815Z 1709/1815 VRB04KT 9999 BKN020 TX21/1814Z TN11/1803Z TEMPO 1719/1723 -SHRA PROB30 TEMPO 1800/1808 0800 BCFG BKN003 BECMG 1809/1811 09008KT=