Download our Flood Warning app
Our Flood Warning app is available for download on the Google Play and Apple App stores.
The app shows:
- Data for Skykomish, Snoqualmie, Tolt, Raging, Cedar, Green and White rivers, and Issaquah Creek.
- Current river flows, flood stage data, and forecasts.
- Hydrographs to see several days of river data and forecasts.
- U.S. Geological Survey and National Weather Service and Northwest River Forecast Center updates about every 10 minutes.
The app was developed by King County and is funded by the King County Flood Control District.
Flood alert phases
Flood alerts can help you decide what actions to take to protect your safety, your family’s safety, and reduce property damages and economic impacts associated with flooding. During high water conditions, King County activates its Flood Warning Center, which uses a four-phase warning system. Sign up for flood alerts to receive warnings for flooding phases 2, 3, and 4. Phase 1 is an alert for King County staff and is not sent to the public.
Flood phases indicate the severity of flooding and guide King County’s response. The thresholds for each phase are based on river gages which measure flow and depth of the river. Flood phases are issued independently for six major rivers.
- Phase 1: County personnel are on alert, and preparations are made to open the Flood Warning Center. No warning is sent to the public for Phase 1.
- Phase 2: Minor flooding in some areas. The Flood Warning Center is open. Staff at the Center monitor river gages and flood conditions around the clock and are available to take calls from the public. A Flood Alert is sent to people signed up for Phase 2 warnings.
- Phase 3: Moderate flooding in some areas. Investigation crews are sent out to monitor flood control facilities (such as levees). A Flood Alert is sent to people signed up for Phase 3 warnings.
- Phase 4: Major flooding in some areas. A Flood Alert is sent to people signed up for Phase 4 warnings. This is the most severe flooding phase. If you receive a Phase 4 Flood Alert, you should take action immediately to protect yourself and your family from flooding.
Other emergency alerting / notification / warning systems
You may be able to subscribe to multiple emergency alert providers depending on where you live. More warnings can give you more time to prepare for emergency situations, so take advantage of as many as you can. We recommend the following alert systems:
Check with your local jurisdiction for emergency alerts. Sign up to receive alerts by all methods possible: phone call, text message, and e-mail. If you have multiple phones or email addresses, consider signing up for alerts with all of them.