1 lightning, as filed by the National Weather Service.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Seattle, WA wrote its last area forecast discussion before the first event at Sep 1, 8:30 AM PST, 3 hours 30 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SEATTLE WA 930 AM PDT WED SEP 1 2004 .SYNOPSIS...COOL UNSTABLE AIR WILL MOVE OVER THE REGION IN THE WAKE OF THIS MORNINGS FRONT THIS AFTERNOON AND EVENING WITH SCATTERED SHOWERS AND THE POSSIBILITY OF THUNDERSTORMS. HIGH PRESSURE WILL BUILD OFFSHORE THURSDAY THEN MOVE OVER THE AREA FOR A DRYING AND WARMING TREND INTO THIS WEEKEND. && .DISCUSSION...FRONT REACHED THE COAST AROUND 12Z THIS MORNING AND WENT THROUGH THE PUGET SOUND AREA AROUND 15Z. SATELLITE IMAGERY SHOWS THE CORE OF THE POOL OF COOL AIR BEHIND THE FRONT JUST WEST OF VANCOUVER ISLAND/NORTHERN WASHINGTON COAST WITH LIGHTNING DETECTION EQUIPMENT ALREADY PICKING UP SOME STRIKES. AIR MASS DESTABILIZING IN THE WAKE OF THE FRONT WITH LIFTED INDEXES BELOW ZERO THIS AFTERNOON...CONVECTIVE TEMPERATURES IN THE LOWER 60S AND CAPE VALUES NEAR 500J/KG. COLD CORE MOVING OVER THE NORTHWEST INTERIOR THIS AFTERNOON WITH MODEL 500 MB TEMPERATURES STILL RUNNING AROUND -22C. END RESULT OF ALL THIS IS CURRENT FORECAST OF SHOWERS WITH A CHANCE OF THUNDERSTORMS LOOKS GOOD. TROUGH AXIS MOVING THROUGH 03Z-09Z TONIGHT WITH THE FLOW ALOFT BECOMING NORTHWESTERLY. SOME CONVERGENCE POSSIBLE TONIGHT IN THE PUGET SOUND AREA BEHIND THE TROUGH AXIS BUT THAT WILL DISSIPATE QUICKLY. UPPER LEVEL RIDGE OFFSHORE BUILDING INTO SOUTHERN BRITISH COLUMBIA LATER THURSDAY INTO FRIDAY FOR A RETURN TO MORE NORMAL LATE SUMMER WEATHER. NO UPDATES PLANNED THIS MORNING. FELTON && .SEW...SMALL CRAFT ADVISORY CENTRAL AND EASTERN STRAIT THROUGH TONIGHT. .KATX..VCP11/CSR21 OPERATIONAL. &&
The Seattle radar (KATX), 131 km away, was scanning. The volume nearest the first event began at 20:00 UTC.
1 lightning. Local standard time, as filed.
Lightning struck a chain link fence outside a mobile home. The lightning traveled through the metal skirting beneath a mobile home, damaging it and injuring the woman inside.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Washington in 2004Every state in 2004This day in weather historyWarnings in Washington, September 2004
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5423691.