Parts of the Pacific Northwest faced their first severe thunderstorm watch in 600 days Thursday, kicking off a multiday weather event that has already knocked out power to roughly 10,000 customers and sent damaging winds screaming across Eastern Oregon at up to 80 miles per hour.
The system, unusual for May in a region that rarely sees severe convective storms, is now pushing into Idaho and Montana with the threat of large hail, localized flash flooding, and even a weak tornado. Heavy rain is forecast to continue through Monday, with pockets of two to three inches expected near Yellowstone National Park.
For the millions of Americans living across this stretch of the inland Northwest, the message is simple: this is not normal weather for this time of year, and the worst may not be over.
The Severe Thunderstorm Watch issued Thursday for parts of Eastern Washington and Eastern Oregon broke a drought of its own kind. The FOX Forecast Center reported that parts of the inland Northwest had not seen such a watch in over three years.
"This region historically sees very few severe storms in May; in fact, parts of the inland Northwest have not seen a severe thunderstorm watch issued in over three years."
That long quiet streak ended with force. Thursday evening, NOAA received reports of damaging wind gusts reaching 80 mph in Eastern Oregon. In a Spokane neighborhood, a large tree came down and took power lines with it. The Spokane Valley Fire Department responded to a house fire initially reported as caused by a lightning strike, though whether that cause has been confirmed remains unclear.
By early Friday, Poweroutage.us tracked approximately 10,000 customers still without electricity across the region. No timeline for full restoration has been announced.
Friday's forecast shifted the threat eastward into Idaho and Montana. The FOX Forecast Center warned of severe thunderstorms capable of producing large hail and even a weak tornado, a rare prospect for a region more accustomed to dry springs.
Details on tornado probability, expected track, or specific timing remain sparse. But the broader pattern is clear: this system is not a one-day event. A Level 1 out of 4 flash flood threat now covers most of Montana and extends into northern Wyoming through the weekend.
The rainfall totals tell the story. The FOX Forecast Center offered a striking comparison:
"This one event could produce as much rain as this part of the Northern Plains usually receives across the entire month of May."
Localized pockets of two to three inches are expected through Monday, with Yellowstone National Park squarely in the path. For a region where infrastructure, drainage, and emergency planning are not built around frequent severe storms, that volume of water in a compressed window poses real risk.
This kind of unusual atmospheric pattern has driven extreme weather events across the continental United States in recent months, locking in conditions that communities are not prepared for.
The Northwest storm threat arrives against a backdrop of catastrophic flooding already underway in Washington state. Close to two feet of rain fell in parts of the Cascade Mountains, triggering more than 600 rescues across 10 counties and 572 assisted evacuations, AP News reported. At times, as many as 100,000 people were under evacuation orders. Multiple levee breaches compounded the damage.
Governor Bob Ferguson warned that the state faces a long recovery, with conditions potentially worsening before they improve.
"We're in the long haul. If you get an evacuation order, for God's sakes, follow it."
Snohomish Regional Fire and Rescue Battalion Chief Jamal Beckham described the danger residents faced: "They did not understand how rapidly the water rises."
That warning applies just as forcefully to the communities now in the crosshairs of this weekend's system. When severe weather arrives in places that seldom see it, the gap between expectation and reality can be lethal.
The inland Northwest is not the Texas Panhandle or central Oklahoma. Residents in Eastern Washington, Eastern Oregon, and western Montana are not conditioned to track severe thunderstorm watches or scan the sky for rotation. Emergency management systems in these areas are calibrated for wildfire season, not convective storms.
That matters. When a massive storm outbreak rolls through the central plains, communities there have sirens, storm shelters, and decades of institutional muscle memory. The Northwest does not.
The 80 mph winds that hit Eastern Oregon Thursday were not the kind of event local infrastructure absorbs easily. Downed trees, snapped power lines, and a house fire in Spokane, all from a single evening of severe weather, illustrate how quickly damage compounds in places where it rarely happens.
And the meteorological cause of this unusual pattern remains unexplained. The FOX Forecast Center characterized the system as historically rare for May but did not detail the atmospheric mechanics driving it into the region. That gap matters for forecasters and emergency planners trying to assess whether this kind of event is becoming more frequent.
Across the country, communities from northern Texas to the Northern Plains have absorbed punishing severe weather this spring.
The immediate concerns are straightforward. Flash flooding is the primary threat through the weekend across Montana and northern Wyoming. Heavy rain near Yellowstone could affect park visitors and surrounding communities with limited evacuation routes. Power restoration for the roughly 10,000 customers still in the dark remains an open question.
Whether this system produces a tornado in Idaho or Montana, and how strong it might be, is another unknown. The FOX Forecast Center flagged the possibility of a weak tornado but offered no specifics on probability or expected track.
For residents from Spokane to Yellowstone, the next several days demand attention. This is not the kind of weather the Northwest plans for. And as communities in Enid, Oklahoma, and elsewhere have learned this spring, severe weather does not wait for you to be ready.
When the watch goes up, you move. Especially when it's the first one in 600 days.
