Metro Detroit's Snowiest Winters and What Roofs Carried
The Detroit climate record goes back to the 1870s, and near the top of it sit two winters more than a century apart. This note reads the snowfall record book the way a roofer does: not as trivia, but as a log of what the roofs of Macomb County have actually been asked to carry.
Every Michigan roof keeps a diary of its winters, and the National Weather Service keeps the official one. The Detroit climate record reaches back to the 1870s, and at the top of the seasonal snowfall table sit two winters separated by more than 130 years: the winter of 2013 to 2014, when the Detroit area measured 94.9 inches of snow, and the winter of 1880 to 1881, which held the record before it at 93.6 inches. This note is about what a number like that actually means on top of a house: more load cycles, longer ice dam duty, and a spring melt measured in tons of water.
01 /What the record book says
The seasonal snowfall rankings come from NWS Detroit climate records, which track snow season by season at the official Detroit observation site. A typical Detroit season lands in the mid 40s of inches, so a record year is roughly double the usual assignment. And the 2013 to 2014 winter did not win with one blockbuster storm. It won on relentlessness: snow that arrived in ordinary installments and never got a long enough thaw to leave. That is the profile roofers remember, because a snowpack that never leaves is a different animal from a big storm that melts off in four days. The full table of top seasons belongs to the climate record, cited below.
02 /A season total is work, not weight
The first thing to understand about a 90 inch season is that 90 inches never sits on the roof at once. Snow settles, compacts, sublimates, and melts between storms. What a big season really means is repetition: load applied, load carried, load shed, over and over, from November into April. Each cycle flexes the deck and the framing a little and works at fastener holes. One cycle is nothing. A record season strings dozens together, and the roof does that work silently while looking the same from the driveway.
The character of the snow matters as much as the depth. Cold, dry powder is light. Settled, wind-packed snow is several times heavier at the same depth, and a rain-on-snow event, common in a southeast Michigan February, can spike the weight of an existing pack overnight without adding a visible inch. Wind also refuses to spread the load evenly. It scours some slopes bare and piles drifts into valleys, behind chimneys, and on the low roof over the garage, so the stress concentrates exactly where roofs are already most vulnerable. We keep the how-much-is-too-much question in its own note, the heavy wet snow advisory, and that is the right page if this winter's forecast is what brought you here.
03 /Ice dam duration and the spring bill
The second thing a record season changes is time. Ice dams need a persistent snowpack, heat escaping through the roof, and freezing nights. In an ordinary winter those conditions line up for a stretch or two. In a season like 2013 to 2014 they can hold for weeks at a time, which means meltwater standing behind an ice ridge, testing the underlayment at the eaves, night after night. Our note on the winter of the ice dams covers what that season taught us, and the companion piece on how many freeze-thaw cycles a Macomb roof sees each year explains why the melt-refreeze rhythm does more damage than the cold itself.
Then comes the exit. As a rule of thumb, ten to twelve inches of accumulated snow can hold roughly an inch of water, so a record pack leaving in a warm week moves an enormous volume through valleys, gutters, and downspouts. Spring melt is when a winter's quiet damage announces itself: the nail pop that became a drip, the flashing seam the ice pried open, the gutter run that sagged under the load and now drains backward. It is also why we tell homeowners that the season a roof fails is often the one after the hard one.
No snowfall record is worth a fall. Never climb onto a snow-covered or ice-covered roof, and be cautious with anyone who offers to. Load relief, if it is ever needed, is done from the ground with a roof rake on the lower courses. If you believe snow or ice has already damaged your roof, the safe move is a free professional inspection once conditions allow, not a ladder in February.
04 /What we recommend after hard winters
A roof that enters winter with unsealed tabs, tired flashing, or a clogged gutter run pays for a hard season; a sound one mostly shrugs it off. We inspect roofs across Macomb County for free, at no cost or obligation, and we photograph what we find so you have documentation either way. Most winter-related findings are repairs, not replacements, and repairs run $350 to $3,200 (larger or complex repairs can run higher). If you want a number before anyone visits, the 60 second cost calculator uses the same published figures.
If melt or ice has already put water in the house, start with the storm damage service page, and know that we answer 24/7 for emergency tarping. Where a storm event and an insurance policy intersect, our storm damage and insurance claims guide walks the process, and we can meet your adjuster on site, though no contractor can promise what a carrier will approve. For everything else the record book stirs up, the guides library is open. The winters are on the record. The only question is what shape your roof meets the next one in.
- National Weather Service, Detroit/Pontiac forecast office: southeast Michigan forecasts, warnings, and event records. weather.gov/dtx
- National Weather Service Detroit/Pontiac climate records, Detroit area snowfall history