FEMA flood map notices
Flood map changes in Okanogan County, Washington
FEMA has published 2 flood hazard notices covering Okanogan County, Washington since November 2023. The most recent, map revision flood hazard determinations, was published Aug 21, 2026.
Notices for Okanogan County
- Aug 21, 2026Map revisionChanges in Flood Hazard DeterminationsAlso covers 24 other counties
- Dec 18, 2025Map revisionChanges in Flood Hazard DeterminationsAlso covers 28 other counties
Also covered by these notices
FEMA often studies whole watersheds, so one notice can span several counties.
- Maricopa County, AZ
- Navajo County, AZ
- Pima County, AZ
- Los Angeles County, CA
- Riverside County, CA
- Sacramento County, CA
- San Bernardino County, CA
- San Diego County, CA
- San Joaquin County, CA
- Santa Clara County, CA
- Shasta County, CA
- Sonoma County, CA
- Adams County, CO
- Arapahoe County, CO
- Boulder County, CO
- Jefferson County, CO
- Larimer County, CO
- Mesa County, CO
- Teller County, CO
- Weld County, CO
- Hawaii County, HI
- Ada County, ID
- Clark County, NV
- Jackson County, OR
- Multnomah County, OR
- Pennington County, SD
- Clark County, WA
- King County, WA
What these notices mean
- Proposed
- FEMA has new draft flood maps. This starts a 90-day window when owners can appeal with technical data. It's the best time to act.
- Final
- Appeals are resolved. The new maps usually take effect about six months later, when lenders start applying the new zones.
- Map revision
- A Letter of Map Revision changes one stretch of the map, often after a levee, channel project or new survey.
Notices are organized by county and community, so a notice for your county doesn't mean your property is changing zones. What flood zones mean