Flood Warning Issued for Johnson Creek Affecting Clackamas and Multnomah Counties
This alert is no longer in effect.
NOAA issued it on April 6, 2026, 4 months ago. Warnings of this kind stay in effect for hours to a few days, so this page is a historical record of what was issued, not a current warning. For conditions where you are right now, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia).
Areazine synthesizes this NWS weather alert directly from NOAA's official public data feed. See our methodology for full source attribution and refresh cadence.
NWS Portland has issued a Flood Warning for Johnson Creek at Sycamore, where minor flooding is forecast to reach 11.3 feet by late Thursday afternoon.
Read this weather record in 30 seconds
- Record type
- Flood Warning
- Affected area
- Clackamas and Multnomah Counties, Oregon
- Issued
- April 6, 2026
- Issuing authority
- NWS Portland OR
Flood notices turn on location and timing. Treat the named area as this record's scope; do not assume nearby counties, parishes, or waterways were included.
Record status: historical. It was issued 4 months ago; use the issuing agency's live warning service for current conditions in Clackamas and Multnomah Counties, Oregon.
Alert Details
The National Weather Service in Portland, OR, has issued a Flood Warning for Johnson Creek at Sycamore. This alert replaces the previous River Flood Watch for the area.
Affected Areas
The warning specifically impacts Clackamas and Multnomah Counties in Oregon. Minor flooding is expected along Johnson Creek, particularly in the areas between SE 92nd Street and SE 122nd Street, as well as the region between Johnson Creek and SE Harold Street.
What You Should Do
Residents and motorists are urged to follow the "Turn around, don't drown" rule when encountering flooded roads. Most flood-related deaths occur in vehicles. Do not attempt to drive around barricades or through flooded areas.
Expected Conditions
Minor flooding is forecast as the river rises. As of 8:30 AM PDT on Thursday, the river stage was measured at 9.4 feet. The bankfull stage is 10.0 feet, while the flood stage is 11.0 feet. The river is forecast to rise to a maximum value of 11.3 feet late this afternoon.
Timeline
The Flood Warning is effective as of 9:01 AM PDT on March 12, 2026. The onset of flooding conditions is expected at 11:00 AM PDT today. The warning remains in effect until 5:00 AM PDT on Saturday, March 14, 2026.
Original source: NOAA Official Notice ↗
Related Weather Alerts
All Weather Alerts →Frequently Asked Questions
Common questions about this NWS weather alert.