Seattle is in for a genuinely stormy Saturday — mostly cloudy skies, a high near 55°F, and an 80% chance of showers and thunderstorms this afternoon. Grab your packable rain jacket and start rethinking any outdoor plans for mid-day.
Today’s Setup
An upper-level trough is parked directly over Western Washington with 500 mb temperatures near -30°C — extraordinarily cold for mid-May, according to the National Weather Service. That unstable air mass is the engine behind today’s storm threat. Scattered showers will be ongoing this morning with some rain shadow relief over parts of central Puget Sound, but don’t bank on staying dry for long.
Timing the Storms
Your best outdoor window is early, before 7 AM, when rain chances are relatively light. Things escalate quickly from there. The National Weather Service expects thunderstorm chances to ramp up around midday, with the heaviest activity between 1 PM and 4 PM. Late afternoon adds another twist: a Puget Sound convergence zone is forecast to develop, and with today’s northwesterly flow aloft, NWS meteorologists note it could set up right over Seattle. Heavier showers at any point today may also produce small hail.
Rain, Hail, and Convergence Zone Risk
This is not routine Pacific Northwest drizzle. Genuine thunderstorm potential, hail in stronger cells, and a possible convergence zone overhead mean exposed spots — waterfront parks, the Burke-Gilman Trail, Alki Beach — should be avoided during peak afternoon hours. Snow levels are near 3,500 feet, so mountain passes will see accumulating snow. The Weather Prediction Center has not issued an excessive rainfall risk for the Seattle metro area — today’s main hazards are lightning and hail.
Gameday Weather: Mariners at T-Mobile Park
The Seattle Mariners vs. San Diego Padres game at T-Mobile Park today falls right in the storm window. Thunderstorms are most likely between 1 PM and 4 PM, with showers likely continuing into the evening. A compact travel umbrella and waterproof hiking boots are smart if you’re walking in from a parking garage. Deck yourself out with a Seattle Mariners jersey or Seattle Mariners fitted cap and make a day of it — just keep one eye on the radar. Still need seats? Get tickets on SeatGeek or Find tickets on StubHub.
For indoor alternatives tonight, John Butler with Band performs at Moore Theatre and Monét X Change: High Heels, Bad Knees takes the stage at Neptune Theatre — both great dry-weather options.
What To Wear
Layers and waterproofing are non-negotiable today. A packable rain jacket is the practical pick, and south-southwest winds running 7 to 12 mph will make 55°F feel noticeably cooler. Save the golf round for next week — conditions today are genuinely dangerous if lightning develops.
Slow-Cooker Saturday Dinner
Rainy, cold, and stormy outside? Perfect excuse to let a programmable slow cooker do the work — load it up with chili or white bean soup in the morning and dinner handles itself. Or braise short ribs low and slow in an enameled cast iron Dutch oven for something truly satisfying. Need ingredients? You can order groceries on Amazon and have everything for tonight’s dinner delivered to your door.
Next Few Days
Sunday is a genuine turnaround. The trough shifts south and a ridge builds offshore, bringing partly sunny skies and a much more comfortable high near 62°F with nearly calm winds — near perfect for the Seattle Sounders FC vs. LA Galaxy match at Lumen Field and the Mariners vs. Padres rematch at T-Mobile Park. The ridge holds through most of next week with only weak systems passing well to the north, so the outlook is quiet and mild. Browse outdoor gear deals to restock your rain kit before the next system eventually finds us.
