12z UKMET is snow through probably 123 or so for DCA. At 126, 0c 850 line is just north of DCA but just south of BWI/HGR and C MD to the M/D line. Temps are in the upper 20s for most through 123... then rise to 30 at 126... and around 32 give or take a degree at 129/132 and sit there for the rest of the run