We’re in the opening act now, on pace for a long-duration storm with a violent ramp-up. Roads are already snowy—pavement temps are 10–15°F, so everything stuck immediately. Expect conditions to deteriorate fast through mid to late afternoon.
Peak rates: 2–4″/hr bursts ~2 PM–midnight, with thundersnow possible 4–10 PM.
Near-blizzard this evening along parts of the coast (best shot: Nantucket & Chatham; possible on the South Shore).
Coastal front sets up: just NW of it is the jackpot zone. Snow starts fluffy everywhere, then turns heavier/pastier near the coast this evening; mix on the Cape & Islands late evening before flipping back.
Overnight → Monday: Snow intensity steps down after midnight (0.5–1″/hr), then lighter / fits & starts Monday (about 0.25–0.33″/hr), with a few lulls. Back edge late day Monday; upslope keeps flakes going in parts of ME.
Power / coast: Isolated outages from snow load + wind; very minor coastal splash-over possible around early Monday AM high tide on the South Shore.
Widespread 12–18″ for many; 18–24″ common across favored belts.
High-end corridors:
Just NW of the coastal front: Norwell/Rockland → Weymouth → Quincy → Dedham (localized 2+ feet).
Frontal zone aloft: Dracut/Lowell → Lawrence → Haverhill → Rockingham County NH (another 2′ target).
Eastern slopes: Berkshires & southern Greens boosted by upslope.
Islands: Even with brief mixing, ~1′ is still on the table given the extreme rates.
North into ME: amounts trail off deeper into the far north, but still a region-wide snowstorm.
This is among the coldest storm starts in recent memory: Worcester at 2°F, Boston 8°F during snow onset. With air temps this low and pavement 10–15°F, treatment effectiveness is limited and roads go snow-covered almost instantly.
We’ll livestream after the Patriots game so we’re not competing for your screen during kickoff, and we’ll keep pushing video updates in-app.
Track it: free 1DegreeOutside app (App Store/Google Play) for radar, hourly, and these videos.
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