1 flash flood, 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 Aug 16, 1:30 PM PST, 2 hours 30 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SEATTLE WA 230 PM PDT MON AUG 16 2004 .SYNOPSIS...A WEAK WEATHER SYSTEM WILL MOVE INTO WESTERN WASHINGTON TUE AND DISSIPATE...BRINGING A CHANCE OF SPRINKLES. HIGH PRES WILL BUILD ALOFT THROUGH THE WEEK. ONSHORE SURFACE FLOW WILL BRING AREAS OF MORNING CLOUDS...BUT IN GENERAL SKIES WILL BE SUNNY. ANOTHER WEATHER SYSTEM WILL APPROACH LATE IN THE WEEKEND. && .DISCUSSION...LOTS OF CONVECTION IN THE CASCADES...MAINLY EAST OF THE CREST. BUT MID LEVEL CLOUDS HAVE PERSISTED OVER PUGET SOUND KEEPING TEMPS MUCH BELOW FORECASTS. WEAK SYSTEM OFF COAST WILL PROBABLY SPREAD LITTLE MORE THAN CLOUDS OVER THE AREA TUE...BUT WITH LINGERING SHOWER THREAT IN THE MORNING AND APPROACHING SHORT WAVE...WENT WITH CHANCE POPS ALL DAY TUE. UPPER RIDGE REBOUNDS AFTER THAT KEEPING SKIES MOSTLY CLEAR THE REST OF THE WEEK. ONSHORE SURFACE FLOW OF VARYING DEGREES EACH DAY WILL KEEP TEMPS FROM SOARING AND ALSO BRING LATE NIGHT AND MORNING CLOUDS INLAND AS FAR AS PUGET SOUND. NEXT SYSTEM IS ON COAST BY SUN NIGHT ACCORDING TO GFS AND HAS SOME SUPPORT FROM OTHER MODELS. PACNW OFFICES HAVE AGREED TO INTRODUCE CHANCE POPS ON DAY 7. BURKE && .SEW...SMALL CRAFT ADVISORY CENTRAL STRAIT AND EAST ENTRANCE. .KATX..VCP11/CSR21 OPERATIONAL. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SEATTLE WA 410 AM PDT MON AUG 16 2004 PZZ110-130>135-150-153-156-WAZ001>018-160835- ADMIRALTY INLET AREA-CENTRAL CASCADE FOOTHILLS-CENTRAL COAST-STRAIT OF JUAN DE FUCA-EVERETT AND VICINITY-HOOD CANAL/KITSAP PENINSULA-NORTH COAST-NORTHERN CASCADE FOOTHILLS-NORTHWEST INTERIOR-OLYMPICS-SAN JUAN COUNTY- SEATTLE METROPOLITAN AREA-SOUTHWEST INTERIOR-TACOMA AREA- WEST SLOPES CENTRAL CASCADES AND PASSES- WEST SLOPES NORTHERN CASCADES AND PASSES-WESTERN WHATCOM COUNTY- 410 AM PDT MON AUG 16 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE NORTHERN AND CENTRAL COASTAL AND INLAND WATERS OF WASHINGTON. THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE NORTHERN AND CENTRAL PARTS OF WESTERN WASHINGTON. .DAY ONE... NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN... NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
1224 PM PDT MON AUG 16 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
1221 PM TSTM WND GST 5 ESE RAINIER 46.86N 122.58W
08/16/2004 42 MPH THURSTON WA TRAINED SPOTTER
GUST RECORDED AT 921 AM. NEARBY TREES DOWN. 0.71 INCHES
OF RAINFALL.
&&
JLBPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
333 PM PDT MON AUG 16 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
0331 PM HAIL 5 ESE RAINIER 46.86N 122.58W
08/16/2004 0.75 INCH THURSTON WA TRAINED SPOTTER
&&
JLBThe Seattle radar (KATX), 60 km away, was scanning. The volume nearest the first event began at 00:05 UTC.
1 flash flood. Local standard time, as filed.
A flash flood caused a mudslide to cover Highway 20 near Rainy Pass. The road was closed for 3 days as crews attempted to remove about 1,200 cubic yards of mud.
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, August 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: 5419746.