How the record has moved
Each step is a change on the interagency incident record — acreage, containment or crews — with the date it was reported. No satellite reading is involved.
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Wednesday 23 September
First reported
—
acreage not yet reported
21
days burning so far
—
no share of the perimeter reported held yet
The official record as of 9:09am today
The Thorn Fire is on the interagency wildfire record in Riverside County, California. The figures below are the official record. A satellite heat map and day-by-day history appear here as soon as detections are attributed to this fire.
Undetermined
The cause has not yet been determined.
21 days
on record — first written down on Wednesday 23 September at 4:20pm local time.
33.886, -117.407lat, lon
is the official point of origin on the interagency record.
Conditions measured 6.0 miles from the fire: 81°F, air at 21% humidity, a 11 mph wind out of the north.
Six other fires are burning inside the same view. Citrus Fire started on Tuesday 1 September, 1.4 miles west, and has reached 15 acres. Kramer Fire started on Sunday 23 August, 4.8 miles south-east, and has reached 1 acres. Copper Fire started on Saturday 12 September, 5.5 miles west, and has reached 1 acres. Gustin Fire started on Friday 18 September, 5.8 miles south-east, and has reached 30 acres. Eagle Fire started on Thursday 27 August, 5.9 miles west, and has reached 0 acres. Harford Fire started on Sunday 4 October, 6.3 miles south-east, and has reached 54 acres. Their heat is counted against them, not against this fire, and the pale rings on the map mark where they are recorded.
Smoke has been recorded lying over this ground five times so far. The thickest of it was moderate between 1:10pm and 4:30pm local time. The last of those windows closed 161 hours ago, so what is overhead now is not known.
No satellite heat has been attributed to this fire yet — either it is too new for a pass to have caught it, or it is too small to register from orbit. Everything above is from the interagency incident record and updates as that record does.