TAF KGRK 030000Z 0300/0406 15012KT 9999 FEW250 QNH2987INS WND 16008KT AFT 0308 
  BECMG 0316/0317 15015G20KT 9999 FEW050 FEW180 QNH2986INS 
  BECMG 0404/0405 15012KT 9999 FEW090 QNH2992INS TX38/0321Z TN25/0312Z