TAF KGRK 1308/1414 17009KT 9999 SKC QNH2978INS 
  BECMG 1309/1310 19009KT 9999 SKC QNH2977INS 
  BECMG 1313/1314 21010G20KT 9999 SKC QNH2975INS TX40/1320Z TN18/1308Z