That is amazing. A sub 980 low taking a Madison WI track putting down multiple inches of QPF would be an all-timer around there. Even without the Kucera enhancement.
Bigger problem with going very cold is that the 850s stall or begin to rise overnight. I think the HRRR is reasonable with single digits in the traditionally cooler spots and low teens at BWI/DCA.
The cold in the northern plains in 1996 rivaled or surpassed 1994. In the days of the old wind chill charts we were in the -60 to -80 range. Just obscene -20 for a high stuff. https://www.weather.gov/arx/cold_feb96
Will be interesting to see what DCA records. This is usually a bad setup for them with temps still at 34, but nighttime helps. I think we get on the board, taking the shutout off the table.