MWN went into that night with this...
211800Z 30049KT 45SM CLR M32/M36 A//// RMK SLPNO T13221356
When we can radiate near max efficiency while MWN is unsaturated, I find the valleys can drop down near that MWN dewpoint.
Here's the CON hourlies...dropped like a rock
CON,1984-01-21 20:00,KCON 212000Z 31009KT 20SM CLR M13/M24 A3046 RMK SLP325 T11281244
CON,1984-01-21 21:00,KCON 212100Z 32007KT 20SM CLR M13/M25 A3046 RMK SLP325 T11331250 51003
CON,1984-01-21 22:00,KCON 212200Z 00000KT 20SM CLR M14/M25 A3048 RMK SLP333 T11391250
CON,1984-01-21 23:00,KCON 212300Z 00000KT 7SM CLR M19/M25 A3053 RMK SLP350 T11891250
CON,1984-01-22 00:00,KCON 220000Z 07004KT 7SM CLR M23/M27 A3055 RMK SLP358 T12281267 411281294 52030
CON,1984-01-22 01:00,KCON 220100Z 00000KT 7SM CLR M25/M29 A3055 RMK SLP358 T12501289
CON,1984-01-22 02:00,KCON 220200Z 00000KT 7SM CLR M27/M31 A3055 RMK SLP358 T12721311
CON,1984-01-22 03:00,KCON 220300Z 00000KT 7SM CLR M29/M32 A3056 RMK SLP361 T12891322 53003
CON,1984-01-22 04:00,KCON 220400Z 00000KT 7SM CLR M30/M33 A3057 RMK SLP365 T13001328
CON,1984-01-22 05:00,KCON 220500Z 00000KT 7SM CLR M31/M34 A3057 RMK SLP365 T13111344
CON,1984-01-22 06:00,KCON 220600Z 00000KT 7SM CLR M32/M34 A3058 RMK SLP367 T13171339 411281317 52007
CON,1984-01-22 07:00,KCON 220700Z 00000KT 7SM CLR M32/M34 A3059 RMK SLP371 T13221339
CON,1984-01-22 08:00,KCON 220800Z 00000KT 7SM CLR M33/M34 A3061 RMK SLP377 T13331344 59085
CON,1984-01-22 09:00,KCON 220900Z 00000KT 7SM CLR M34/M35 A3061 RMK SLP378 T13391350 51010
CON,1984-01-22 10:00,KCON 221000Z 00000KT 7SM CLR M34/M36 A3062 RMK SLP380 T13441356
CON,1984-01-22 11:00,KCON 221100Z 00000KT 7SM CLR M35/M36 A3063 RMK SLP383 T13501361
CON,1984-01-22 12:00,KCON 221200Z 00000KT 7SM CLR M36/M37 A//// RMK SLP389 T13611372