Thunderstorm Wind — Spokane, Washington

2014-07-23 · near South Cheney, Spokane, Washington

Event narrative

A wet microburst brought sustained winds of 35 to 50 mph with gusts 60 to 70 mph across Spokane County. The winds descended near Cheney and peaked while passing through Airway Heights, Northwestern Spokane, and Deer Park. Hundreds of Ponderosa Pines were snapped and downed from Northwestern Spokane to Deer Park. Downed trees led to widespread structural damage, blocked roads, power outages, and injuries. Significant damage was observed at the Riverside Village Mobile Home Park from trees falling on mobile homes prompting a search and rescue. One woman was trapped but was not injured. At least 40 mobile homes and cars in the park were severely damaged. Forty eight trees were knocked down at a resort on Lake Eloika. Trees fell on six RVs and the resort's oldest cabin forcing the owners to close their doors for a short period of time. One person was injured when a tree landed on his vehicle while driving along Lakeside Dr near Reflection Lake in Elk, WA. A tree branch flew through his windshield and drove him off the road severing his arm and impaling his hip. He eventually lost his arm in the accident. Three other people were injured near the Spokane Courthouse by falling tree branches. Over 30,000 people lost power during the event. Because of the extent of damage, some residents and businesses remained in the dark for up to four days. Downed power poles and lightning strikes sparked several new wildfires which quickly grew due to the strong winds. The winds completely damaged a airport hanger and caused between ten to twelve thousand dollars worth of damage to planes.

Wider weather episode

A deep trough of low pressure dropped down the Washington Coastline then swung inland into the Inland Northwest during the afternoon of July 23rd. The wave took on a strong negative tilt and moved into a moist and very unstable air mass. The outcome was a widespread severe weather event for Eastern Washington and Northern Idaho producing large hail, flash flooding, and widespread wind damage. Large hail and heavy rain were the initial threats early in the afternoon. Late in the afternoon, the threat shifted to damaging winds with hundreds of downed or snapped trees. The hardest hit areas were Northeastern Washington and Northern Idaho. Falling trees led to some injuries in Eastern Washington.

View location on OpenStreetMap → (47.4328, -117.5208)

Source: NOAA Storm Events Database, event_id 533104. Narrative written by the NWS forecast office that issued the report.