How long did the Boundary fire last?

It burned between 1 June 2017 and 1 June 2017: 1 day, according to the start date recorded by United States agencies (MTBS / NIFC) and the heat detections seen by satellite.

How much area did it burn?

The official perimeter published by United States agencies (MTBS / NIFC) is 7,205 hectares (72.0 km²). Other tallies, such as daily incident reports, may give slightly different figures.

Which counties burned?

The fire only entered Coconino (7,198 ha, 0.2 %).

What was the weather like?

During the fire the temperature reached 34.0 °C, humidity dropped to 3 % and gusts hit 80 km/h. The fire danger index (FWI) reached 84, class Very extreme.

Where does this data come from?

From the official burnt perimeter of United States agencies (MTBS / NIFC, public domain), NASA FIRMS VIIRS hotspots and the administrative boundaries of United States. It is not an official report.

US · United States · 2017-06-01 → 2017-06-01

Boundary Fire, June 2017 Coconino

Out · last detection 2 Jun 2017, 08:53 UTC

The fire started on 1 June 2017 in Coconino, United States, and satellites saw it burning for 1 day. United States agencies (MTBS / NIFC) mapped an official burnt perimeter of 7,205 hectares, spread across a single county.

It is the 44th largest in Arizona since 2016 (of 380 with a page). Number 110 in United States in 2017, of 619.

Burnt area: 7,205ha; official perimeter (MTBS / NIFC)
Duration: 1day; 1 Jun 2017 – 1 Jun 2017
Municipalities hit: 1; counties
Started on: 1 Jun; 2017
Heat detections: 1,186; in a single hotspot: 253 MW
Danger at start: 27; High · FWI index
Energy released: 7MW; sum of detected power

HOTSPOTS BY DAY 1 Jun1 Jun

How it evolved, day by day

Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.

The weather it burned in

34°high

80km/h · peak gust

3%lowest humidity

It had gone 0 days without rain (1 mm or more) when it started.

This area had burned before

No earlier perimeters overlap this fire since 2016, when the satellite record begins.

What happened to each town

Coconino where it started

7,198 ha reached on 2 Jun

0.2 %

Burnt area inside each county, from crossing the official perimeter with administrative boundaries. The distance is from the town centre to the nearest fire: staying a kilometre away does not mean it reached the houses.

The weather day by day

ECMWF ERA5 reanalysis at the fire location, the standard reference for past weather, and the Canadian Fire Weather Index (the same system Copernicus uses), computed by WorldFires from that data. Days after the fire run until the first rain.

Open-Meteo.com (CC BY 4.0) · Copernicus Climate Change Service (ERA5)

Day	High	Min. humidity	Peak gust	Rain	Danger (FWI)
1 Jun	22.6 °C	14 %	35 km/h	0.0 mm	High 27
2 Jun after	23.5 °C	15 %	27 km/h	0.0 mm	High 30
3 Jun after	26.8 °C	8 %	37 km/h	0.0 mm	Very high 41
4 Jun after	27.8 °C	11 %	46 km/h	0.0 mm	Extreme 51
5 Jun after	27.8 °C	12 %	52 km/h	0.4 mm	Very high 49
6 Jun after	28.7 °C	11 %	45 km/h	0.0 mm	Very high 47
7 Jun after	28.4 °C	10 %	54 km/h	0.0 mm	Extreme 57
8 Jun after	27.2 °C	6 %	58 km/h	0.0 mm	Extreme 64
9 Jun after	27.1 °C	10 %	68 km/h	0.0 mm	Very extreme 72
10 Jun after	25.7 °C	9 %	68 km/h	0.0 mm	Very extreme 73
11 Jun after	22.6 °C	15 %	71 km/h	0.0 mm	Extreme 69
12 Jun after	19.3 °C	6 %	80 km/h	0.0 mm	Very extreme 77
13 Jun after	23.4 °C	6 %	30 km/h	0.0 mm	Very high 44
14 Jun after	27.9 °C	4 %	29 km/h	0.0 mm	Very high 46
15 Jun after	30.1 °C	3 %	36 km/h	0.0 mm	Extreme 54
16 Jun after	30.6 °C	3 %	31 km/h	0.0 mm	Extreme 55
17 Jun after	31.8 °C	4 %	37 km/h	0.0 mm	Extreme 59
18 Jun after	31.9 °C	10 %	35 km/h	0.1 mm	Extreme 58
19 Jun after	32.3 °C	9 %	34 km/h	0.1 mm	Extreme 57
20 Jun after	34.0 °C	6 %	35 km/h	0.0 mm	Extreme 57
21 Jun after	33.6 °C	6 %	44 km/h	0.0 mm	Extreme 70
22 Jun after	33.0 °C	7 %	63 km/h	0.0 mm	Very extreme 84
23 Jun after	31.7 °C	7 %	33 km/h	0.0 mm	Extreme 58
24 Jun after	32.4 °C	6 %	35 km/h	0.0 mm	Extreme 60
25 Jun after	29.3 °C	12 %	55 km/h	3.4 mm	High 25
26 Jun after	30.7 °C	8 %	55 km/h	0.0 mm	Extreme 58
27 Jun after	29.6 °C	4 %	64 km/h	0.0 mm	Very extreme 72
28 Jun after	29.1 °C	5 %	64 km/h	0.0 mm	Very extreme 76
29 Jun after	30.0 °C	4 %	51 km/h	0.0 mm	Extreme 63
30 Jun after	30.1 °C	4 %	37 km/h	0.0 mm	Extreme 57
1 Jul after	30.5 °C	7 %	45 km/h	0.0 mm	Extreme 57
2 Jul after	28.4 °C	8 %	63 km/h	0.0 mm	Very extreme 73
3 Jul after	29.3 °C	9 %	53 km/h	0.0 mm	Extreme 66
4 Jul after	31.4 °C	5 %	30 km/h	0.0 mm	Extreme 53
5 Jul after	33.1 °C	4 %	34 km/h	0.0 mm	Extreme 53
6 Jul after	32.0 °C	7 %	27 km/h	0.0 mm	Extreme 54
7 Jul after	30.6 °C	11 %	28 km/h	0.3 mm	Very high 48
8 Jul after	29.7 °C	13 %	32 km/h	0.9 mm	Very high 41

Before and after, from space

Drag the line to compare the same ground before the fire and after it.

↔

Before · 25 May 2017

After · 8 Jun 2017

Before After

If the day is cloudy, change the date: each satellite passes once a day. In false colour the burnt ground looks brown or red.

Detections table · 1,186Every satellite heat detection, one by one, with time, satellite, power and coordinates.

⬇ Download CSV Times in UTC. Each detection is a 375 m pixel: a large fire yields hundreds per pass.

Date and time	Satellite	FRP (MW)	Lat	Lon

Other fires nearby

All fires in United States ›

Frequently asked questions

How long did the Boundary fire last?: It burned between 1 June 2017 and 1 June 2017: 1 day, according to the start date recorded by United States agencies (MTBS / NIFC) and the heat detections seen by satellite.
How much area did it burn?: The official perimeter published by United States agencies (MTBS / NIFC) is 7,205 hectares (72.0 km²). Other tallies, such as daily incident reports, may give slightly different figures.
Which counties burned?: The fire only entered Coconino (7,198 ha, 0.2 %).
What was the weather like?: During the fire the temperature reached 34.0 °C, humidity dropped to 3 % and gusts hit 80 km/h. The fire danger index (FWI) reached 84, class Very extreme.
Where does this data come from?: From the official burnt perimeter of United States agencies (MTBS / NIFC, public domain), NASA FIRMS VIIRS hotspots and the administrative boundaries of United States. It is not an official report.

Where to verify it

A satellite detection is not an official report. Final figures and the fire’s status are published by each country’s emergency service.

Emergency number: 911

Satellite cross-check

NASA FIRMS ↗
NIFC · Fire maps ↗

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This page is built from satellite data and official records, and it sometimes gets things wrong: the wrong dates, the wrong town, two fires merged into one, or something that was not a wildfire at all. If you know this fire first-hand (you live nearby, saw it, fought it or reported on it), tell us what really happened and we will check it.

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Where this data comes from

The perimeter is official and in the public domain. For past years it comes from MTBS (Monitoring Trends in Burn Severity), run by the U.S. Geological Survey and the USDA Forest Service, which map it on Landsat and Sentinel-2 imagery. For the current and last year it comes from WFIGS at the National Interagency Fire Center (NIFC): incident perimeters mapped by fire crews, aircraft and imagery. Heat detections come from the VIIRS sensors aboard Suomi-NPP and NOAA-20, distributed by NASA FIRMS at 375 m resolution. County boundaries come from geoBoundaries ADM2 (Public Domain). The area per county is computed by WorldFires by crossing the perimeter with those boundaries, so it may differ slightly from official figures.

Where it burned