Seattle's "Almost" Hailstorm Is a Wake-Up Call for Outdoor Deck Protection Press Services

The National Weather Service flagged a rare spring storm system capable of producing large hail this month.

BURIEN, United States - April 17, 2025 / Gibson Fence and Deck /

The storm fizzled, but the forecast had all the ingredients for damaging hail

Seattle, WA - April 2025 - Seattle was on edge earlier this month after the National Weather Service flagged a rare spring storm system capable of producing large hail, strong wind gusts, and even tornadoes. The alerts were clear: damaging conditions were possible. Residents shared memes, scrambled to cover outdoor furniture, and waited for the skies to break loose.

But the storm never delivered. Fog and a thick cloud layer kept the atmosphere from heating up enough to trigger widespread instability. That one missing ingredient kept hail from forming—this time.

Every other factor was lined up. We got lucky. But the forecast wasn’t wrong; we might not be so fortunate next time.

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Experts say it’s time to take storm prep seriously—even when the skies stay clear

Storm systems can shift fast. Forecast models might call for blue skies in the morning and hail by dinner. That’s what made the recent alert so serious. Seattle doesn’t often face hail threats, but when it does, the timing can be tight and the risk high. Most homeowners aren’t used to treating spring weather as a threat, but forecasts like this one are a signal to rethink that mindset.

Treat this past scare as a free test run. The forecast wasn’t wrong—it just didn’t fully materialize.

Next time, it might. As weather patterns shift and extremes become more common, fast-moving storm systems will likely hit harder and more often. Homeowners with elevated or exposed decks should think in terms of “when,” not “if.” Check your outdoor space now—not mid-storm. Know where water drains off your deck. Make sure railings are tight, connections are solid, and access doors or gates latch securely. If something looks questionable in calm weather, it’s going to be a liability during a storm.

Protecting outdoor decks now can prevent costly damage later

Before the next storm, prep your deck like it’s going to get hit. Cover exposed boards with heavy-duty tarps, rubber-backed mats, or even plywood sheets. Use bungee cords or deck weights to keep them in place. Move furniture and planters off the deck entirely if you can—stored inside a garage or shed is best. If that’s not an option, group them tightly in a corner and strap them down. Lock grill lids and disconnect propane tanks. For built-in features like outdoor kitchens, wrap exposed appliances and outlets with waterproof covers and add corner bumpers or padding to prevent denting.

Now’s also a good time to think long-term. Composite decking like TimberTech or high-density hardwoods like Ipe resist impact and don’t splinter easily. Fire-retardant-treated wood is another solid option, especially if you're already due for an upgrade.

Secure pergolas or shade structures with reinforced anchoring systems or hurricane ties. Inspect joist hangers, post bases, and fasteners for corrosion—especially if your deck is older. Weak connections fail first in high winds and hail. And don’t forget drainage—make sure nothing is clogging your downspouts, deck gaps, or under-deck channels. Standing water and hail buildup can warp boards, crack finishes, and lead to long-term water damage.

Gibson Fence and Deck is a high-end deck contractor Seattle homeowners can rely on. Our commitment to craftsmanship and client satisfaction has earned the trust of countless Seattle residents. Check out our portfolios online today!