Larkspur Forensic Weather & Hail Impact Report

Look, I’ve been replacing roofs up here for over fifteen years, and if there’s one thing I tell every homeowner in Larkspur, it’s that we’re sitting right in the bullseye of Colorado’s worst weather. You see how the Palmer Divide juts up right south of town? That ridge acts like a giant speed bump for spring and summer storms. When those cold fronts slam into the warm, moist air coming off the plains, the whole system gets squeezed and spun upward, which is exactly how you get those sudden, violent supercells that pop up out of nowhere around 4 p.m. in May and June. And because we’re at that altitude, the hail doesn’t have time to melt before it hits your shingles—we’re talking marble to baseball-sized ice coming down at a steep angle, often with straight-line winds that can hit 70 or 80 miles an hour. That combination isn’t just a few dings; it’s a full-on assault on your roof’s surface.

The real kicker is how the wind works with the hail here. Those same storms that drop the ice also generate these weird, swirling downdrafts that funnel right down the canyons and across the open lots in Larkspur. So you’ll get hail pounding one side of your roof while the wind is ripping shingles up from the opposite edge, and then the next gust flips them over like playing cards. It’s not like a coastal hurricane where you get steady rain and wind for hours—ours is a violent, 20-minute barrage where the hail is driven sideways into your valleys and flashing, and the wind is lifting the tabs right off the deck. I’ve seen brand-new architectural shingles with granule loss so bad they looked 20 years old after one storm, and the damage is often hidden—you won’t see it from the ground, but the felt underneath is shredded. That’s why I always tell folks here: if you hear that roar coming from the southwest, don’t just check your gutters—call me before the next rain, because the second storm will finish what the first one started.