Parnamirim Hoopoes Castform thundery Vaitkus NOTAMs Blacksod forecasters hydrogeologic flight Worsening forecast forecaster SKYWARN forecasts meteorological preflight AWOS Enneatypes actual RTQQ SA07 JIAAC might squally MCDU ACARS Karush Farwest icing Korherr LSAG adverse Splints NTSB plan whiteout