Washington DNR·
Acreage updated from 3449 to 3676 acres
Significant incidentUpdated
Active Wildfire · Chelan County, WA
SISI Firenear Chelan County, WA
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15%
Contained
Size
3,676acres
Status
Active
Discovered
Updates
Washington DNR·
fire_cause updated to DNR NOT RESPONSIBLE
WFIGS·
Containment updated from 5% to 15%. Personnel updated to 116. Fire behavior: Active.
InciWeb·
WAOWF Sisi Fire: Last updated: 2026-09-17 --- The type of incident is Wildfire and involves the following unit(s) Okanogan-Wenatchee National Forest. --- State: Washington --- Coordinates: Latitude: 48° 20 48 Longitud...
Washington DNR·
Acreage updated from 3193 to 3449 acres
Washington DNR·
fire_cause updated to DNR NOT RESPONSIBLE
WFIGS·
Personnel updated to 120. Fire behavior: Moderate.
InciWeb·
WAOWF Sisi Fire: Last updated: 2026-09-16 --- The type of incident is Wildfire and involves the following unit(s) Okanogan-Wenatchee National Forest. --- State: Washington --- Coordinates: Latitude: 48° 20 48 Longitud...
Washington DNR·
fire_cause updated to DNR NOT RESPONSIBLE
WFIGS·
Personnel updated to 114.
InciWeb·
WAOWF Sisi Fire: Last updated: 2026-09-15 --- The type of incident is Wildfire and involves the following unit(s) Okanogan-Wenatchee National Forest. --- State: Washington --- Coordinates: Latitude: 48° 20 48 Longitud...
Washington DNR·
fire_cause updated to DNR NOT RESPONSIBLE
WFIGS·
Personnel updated to 119.
InciWeb·
WAOWF Sisi Fire: Last updated: 2026-09-14 --- The type of incident is Wildfire and involves the following unit(s) Okanogan-Wenatchee National Forest. --- State: Washington --- Coordinates: Latitude: 48° 20 48 Longitud...
Washington DNR·
fire_cause updated to DNR NOT RESPONSIBLE
WFIGS·
Personnel updated to 118. Fire behavior: Minimal.
InciWeb·
WAOWF Sisi Fire: Last updated: 2026-09-13 --- The type of incident is Wildfire and involves the following unit(s) Okanogan-Wenatchee National Forest. --- State: Washington --- Coordinates: Latitude: 48° 20 48 Longitud...
3 routine updates · acreage, cause, containment, personnelShow ↓
- Acreage updated from 3054 to 3193 acres
- fire_cause updated to DNR NOT RESPONSIBLE
- Containment updated from 11% to 5%. Personnel updated to 117.
InciWeb·
WAOWF Sisi Fire: Last updated: 2026-09-12 --- The type of incident is Wildfire and involves the following unit(s) Okanogan-Wenatchee National Forest. --- State: Washington --- Coordinates: Latitude: 48° 20 48 Longitud...
3 routine updates · acreage, cause, personnelShow ↓
- Acreage updated from 2764 to 3054 acres
- fire_cause updated to DNR NOT RESPONSIBLE
- Personnel updated to 137.
InciWeb·
WAOWF Sisi Fire: Last updated: 2026-09-11 --- The type of incident is Wildfire and involves the following unit(s) Okanogan-Wenatchee National Forest. --- State: Washington --- Coordinates: Latitude: 48° 20 48 Longitud...
Washington DNR·
fire_cause updated to DNR NOT RESPONSIBLE
WFIGS· First report
First report.
Personnel updated to 130. Fire behavior: Active.
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SISI FireSignificant · 3,676 ac · 15% containedFollow