91f_ndfdloop_map.gif overlay=91f_ndfdweather_ndfdwx_trans.gif,91f_ndfdfronts_fronts_trans.gif "Forecast valid 18 UTC May 16 2013" 92f_ndfdloop_map.gif overlay=92f_ndfdweather_ndfdwx_trans.gif,92f_ndfdfronts_fronts_trans.gif "Forecast valid 00 UTC May 17 2013"