NWS Seattle WAFF.W 0001August 13, 2026
Flash Flood Warning: Mason, WA
The National Weather Service office in Seattle issued a flash flood warning for Mason in Washington, which was in force until 5:30 p.m. local time on August 13. It was the 1st flash flood warning the NWS office in Seattle issued in 2026. Washington had 4 flash flood warnings in August 2026, against 3 in an average August of 2008-2025 (Washington's flash flood warnings by year).
ExpiredWarning
In force for 1.9 hours; it has expired. The agency may have replaced it with a new notice.
The notice
- Issued by
- National Weather Service, Seattle WA
- Area
- Mason
- State
- Washington
- Level
- Warning
- Issued
- 3:37 p.m. PDT, August 13, 2026
- Expires
- 5:30 p.m. PDT, August 13, 2026
- CAP severity, certainty, urgency
- Severe, Likely, Immediate
- VTEC event
- KSEW FF.W 0001
- Official source
- National Weather Service: the notice at its source
Source: National Weather Service: the notice at its source. AreaZine rebuilds this page from the agency's record; the agency's page is the one to act on. A U.S. Government work, in the public domain.
The notice as issued
FFWSEW The National Weather Service in Seattle has issued a * Flash Flood Warning for... The Bear Gulch burn scar in... Northwestern Mason County in northwestern Washington... * Until 530 PM PDT. * At 337 PM PDT, Doppler radar indicated thunderstorms producing heavy rain over the Bear Gulch Burn Scar. Flash flooding is ongoing or expected to begin shortly. Excessive rainfall over the burn scar will result in debris flow moving through the Bear Gulch burn scar. The debris flow can consist of rock, mud, vegetation and other loose materials. HAZARD...Flash flooding caused by thunderstorms in and around the Bear Gulch Burn Scar. SOURCE...Radar indicated. IMPACT...Flooding of areas in and around the Bear Gulch Burn Scar. * North Fork Skokomish River headwaters
What the agency told people to do
This is a life threatening situation. Heavy rainfall will cause extensive and severe flash flooding of creeks...streams...and ditches in the Bear Gulch Burn Scar. Severe debris flows can also be anticipated across roads. Roads and driveways may be washed away in places. If you encounter flood waters...climb to safety.
Source: National Weather Service: the notice at its source. The text is the agency's, unedited. A U.S. Government work, in the public domain.