A robust Pacific shortwave moved east from the Great Lakes with attendant|primary low tracking well to the north on the 18th bringing accumulating snow Saturday afternoon and night. A secondary low developed in the Gulf of Maine late Sat night which was too far north to stop low level warming from advancing northward across southern New England Saturday night which changed snow to rain/wintry…
Every event with a place to put it; 4 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS BOX wrote it up.
A robust Pacific shortwave moved east from the Great Lakes with attendant|primary low tracking well to the north on the 18th bringing accumulating snow Saturday afternoon and night. A secondary low developed in the Gulf of Maine late Sat night which was too far north to stop low level warming from advancing northward across southern New England Saturday night which changed snow to rain/wintry mix before ending. The precipitation ended by early Sunday as the storm moved away, followed by drier and colder weather.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Boston/Norton, MA wrote its last area forecast discussion before the first event at Jan 18, 4:19 PM EST, 1 hour 41 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
4 heavy snow. Local standard time, as filed.
Final snow totals generally ranged from 4-6 inches in northern Worcester County. A ham radio operator reported 6.6 inches in Royalston. Several CO-OP observers in Ashburnham, Winchendon, Hubbardston, Fitchburg, and Lunenburg all reported 5.5 inches.
Final snow totals ranged from 4 to 6 inches in western Middlesex County. Trained spotters reported 6 inches in Hudson and 5.7 inches in Dracut.
Final snow totals ranged from 4 to 6 inches. Trained spotters reported 6 inches in Topsfield and Groveland as well as 5.5 inches in Haverhill, Middleton, Bradford, and Methuen.
Final snow totals ranged from 4 to 6 inches. Trained spotters reported 5.6 inches in Pepperell and 5.1 inches in Ayer.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Massachusetts in 2020Every state in 2020This day in weather historyWarnings in Massachusetts, January 2020
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 869386, 869387, 869388, 869399.