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Ibex Fire, July 2017 Custer

Out · last detection 25 Jul 2017, 20:22 UTC

The fire started on 24 July 2017 in Custer, United States, and satellites saw it burning for 1 day. United States agencies (MTBS / NIFC) mapped an official burnt perimeter of 6,790 hectares, spread across a single county.

It is the 51th largest in Idaho since 2016 (of 379 with a page). Number 119 in United States in 2017, of 619.

Burnt area
6,790ha
official perimeter (MTBS / NIFC)
Duration
1day
24 Jul 2017 – 24 Jul 2017
Municipalities hit
1
counties
Started on
24 Jul
2017
Heat detections
1,355
in a single hotspot: 1,103 MW
Danger at start
28
High · FWI index
Energy released
72MW
sum of detected power

Where it burned

HOTSPOTS BY DAY 24 Jul24 Jul

How it evolved, day by day

25

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

The weather it burned in

28°high
59km/h · peak gust
8%lowest humidity

It had gone 8 days without rain (1 mm or more) when it started. Rain came after the fire: 1.4 mm on 13 Sept.

This area had burned before

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

What happened to each town

  1. Custer where it started
    6,820 ha reached on 25 Jul
    0.5 %

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)
24 Jul 24.6 °C 15 % 49 km/h 0.9 mm High 28
25 Jul after 22.2 °C 21 % 39 km/h 2.7 mm Low 8
26 Jul after 20.6 °C 40 % 30 km/h 5.5 mm Very low 2
27 Jul after 21.4 °C 35 % 31 km/h 2.9 mm Very low 2
28 Jul after 22.4 °C 29 % 23 km/h 0.4 mm Low 7
29 Jul after 24.5 °C 21 % 23 km/h 0.4 mm Moderate 17
30 Jul after 24.2 °C 18 % 34 km/h 1.2 mm Moderate 16
31 Jul after 26.6 °C 13 % 42 km/h 0.0 mm High 28
1 Aug after 24.8 °C 18 % 48 km/h 0.8 mm High 25
2 Aug after 26.0 °C 13 % 41 km/h 0.0 mm High 30
3 Aug after 26.9 °C 12 % 33 km/h 0.0 mm High 31
4 Aug after 26.3 °C 16 % 46 km/h 0.0 mm High 36
5 Aug after 23.7 °C 16 % 40 km/h 0.0 mm High 34
6 Aug after 22.8 °C 17 % 30 km/h 0.0 mm High 31
7 Aug after 21.4 °C 27 % 29 km/h 0.0 mm High 28
8 Aug after 21.8 °C 19 % 25 km/h 0.0 mm High 26
9 Aug after 20.5 °C 26 % 26 km/h 0.0 mm High 26
10 Aug after 22.8 °C 23 % 25 km/h 0.1 mm High 26
11 Aug after 23.3 °C 20 % 24 km/h 1.0 mm Moderate 19
12 Aug after 23.9 °C 21 % 35 km/h 0.8 mm High 24
13 Aug after 17.2 °C 39 % 57 km/h 0.5 mm High 26
14 Aug after 16.4 °C 38 % 34 km/h 0.6 mm Moderate 17
15 Aug after 20.4 °C 15 % 35 km/h 0.0 mm High 28
16 Aug after 20.3 °C 24 % 42 km/h 0.1 mm High 29
17 Aug after 22.5 °C 19 % 34 km/h 0.0 mm High 29
18 Aug after 24.8 °C 12 % 43 km/h 0.0 mm High 37
19 Aug after 21.6 °C 16 % 59 km/h 0.0 mm Very high 42
20 Aug after 22.2 °C 14 % 42 km/h 0.0 mm High 37
21 Aug after 23.5 °C 17 % 26 km/h 0.0 mm High 33
22 Aug after 25.6 °C 13 % 36 km/h 0.0 mm High 37
23 Aug after 18.5 °C 26 % 30 km/h 0.0 mm High 32
24 Aug after 19.9 °C 37 % 41 km/h 2.5 mm Low 7
25 Aug after 22.1 °C 21 % 56 km/h 0.5 mm High 24
26 Aug after 25.1 °C 17 % 38 km/h 0.0 mm High 31
27 Aug after 26.7 °C 8 % 33 km/h 0.0 mm High 37
28 Aug after 25.4 °C 13 % 32 km/h 0.0 mm Very high 40
29 Aug after 26.0 °C 11 % 44 km/h 0.0 mm Very high 43
30 Aug after 22.4 °C 22 % 36 km/h 1.4 mm Moderate 18
31 Aug after 22.7 °C 20 % 48 km/h 0.5 mm High 32
1 Sept after 25.5 °C 16 % 31 km/h 0.0 mm High 32
2 Sept after 28.0 °C 11 % 38 km/h 0.0 mm Very high 41
3 Sept after 28.1 °C 9 % 37 km/h 0.0 mm Very high 42
4 Sept after 25.8 °C 12 % 37 km/h 0.0 mm Very high 43
5 Sept after 23.9 °C 13 % 34 km/h 0.0 mm Very high 41
6 Sept after 23.3 °C 16 % 30 km/h 0.0 mm High 38
7 Sept after 23.5 °C 16 % 23 km/h 0.0 mm Very high 39
8 Sept after 20.8 °C 25 % 38 km/h 3.3 mm Low 7
9 Sept after 21.8 °C 34 % 38 km/h 0.6 mm Moderate 15
10 Sept after 21.5 °C 26 % 42 km/h 0.0 mm High 24
11 Sept after 25.1 °C 18 % 24 km/h 0.0 mm High 28
12 Sept after 22.3 °C 23 % 40 km/h 0.0 mm High 32
13 Sept after 18.8 °C 26 % 50 km/h 1.4 mm Moderate 17

Before and after, from space

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

Before · 17 Jul 2017
After · 31 Jul 2017

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 · 1,355Every 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 timeSatelliteFRP (MW)LatLon

Other fires nearby

All fires in United States ›

Frequently asked questions

How long did the Ibex fire last?
It burned between 24 July 2017 and 24 July 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 6,790 hectares (67.9 km²). Other tallies, such as daily incident reports, may give slightly different figures.
Which counties burned?
The fire only entered Custer (6,820 ha, 0.5 %).
What was the weather like?
During the fire the temperature reached 28.1 °C, humidity dropped to 8 % and gusts hit 59 km/h. The fire danger index (FWI) reached 43, class Very high.
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

Does something look wrong on this page?

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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We will only use your email to reply about this report. Privacy. This is not an emergency service: if there is a fire now, call 911.

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.