I know because that 20" amount was taken close to 2:30 AM this morning. With Bedford at about 18.0", Acton at 21.8", Methuen at 18.3" and Lowell at 20.1", and the way that Coastal Front behaved, those amounts seem pretty spot on.
East Acton 21.8 700 AM 2/02 Ham Radio
Hudson 20.9 659 AM 2/02 Ham Radio
Littleton 20.4 805 AM 2/02 Trained Spotter
LOWELL 20.1 836 AM 2/02 Trained Spotter
Wilmington 20.0 221 AM 2/02 General Public
Dracut 19.6 737 AM 2/02 Ham Radio
Tewksbury 19.5 635 AM 2/02 Trained Spotter
Townsend 18.2 931 AM 2/02 Trained Spotter
burlington 18.2 1131 PM 2/01 Trained Spotter
WInchester 18.2 744 AM 2/02 Trained Spotter