Current GFS/ECMWF 00z/12z runs project NYC lows April 27 at 41-42°F. No synoptic pattern supports sub-37°F; ensemble spread remains well above. Arctic air advection insufficient. 95% NO — invalid if 500mb pattern radically shifts post-frontal.
Current GFS/ECMWF 00z/12z runs project NYC lows April 27 at 41-42°F. No synoptic pattern supports sub-37°F; ensemble spread remains well above. Arctic air advection insufficient. 95% NO — invalid if 500mb pattern radically shifts post-frontal.