How long did the Weimer fire last?

According to the heat detections seen by satellite inside the perimeter, it burned from 3 July 2024 to 6 July 2024 (4 days). The perimeter dates it from 3 July 2024 to 3 July 2024.

How much area did it burn?

The official perimeter published by United States agencies (MTBS / NIFC) is 441 hectares (4.4 km²). Other tallies, such as daily incident reports, may give slightly different figures.

Which counties burned?

The fire only entered Coconino (434 ha, 0.0 %).

What was the weather like?

During the fire the temperature reached 32.8 °C, humidity dropped to 5 % and gusts hit 42 km/h. The fire danger index (FWI) reached 41, 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.

US · United States · 2024-07-03 → 2024-07-06

Weimer Fire, July 2024 Coconino

Out · last detection 6 Jul 2024, 09:12 UTC

The fire started on 3 July 2024 in Coconino, United States, and satellites saw it burning for 4 days. United States agencies (MTBS / NIFC) mapped an official burnt perimeter of 441 hectares, spread across a single county.

It is the 363th largest in Arizona since 2016 (of 380 with a page). Number 348 in United States in 2024, of 371.

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Burnt area: 441ha; official perimeter (MTBS / NIFC)
Duration: 4days; 3 Jul 2024 – 6 Jul 2024
Municipalities hit: 1; counties
Started on: 3 Jul; 2024
Heat detections: 61; in a single hotspot: 44 MW
Danger at start: 23; High · FWI index
Average daily power: 229MW; detected power per day, on average

HOTSPOTS BY DAY 3 Jul6 Jul

Play back 6 Jul 2024

How it evolved, day by day

4 Jul 5 Jul 6 Jul

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

The weather it burned in

33°high

42km/h · peak gust

5%lowest humidity

It had gone one day 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

434 ha reached on 4 Jul

0.0 %

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)
3 Jul	29.6 °C	19 %	39 km/h	0.1 mm	High 23
4 Jul	31.6 °C	8 %	40 km/h	0.0 mm	Very high 38
5 Jul	30.6 °C	5 %	42 km/h	0.0 mm	Very high 41
6 Jul	32.8 °C	7 %	33 km/h	0.0 mm	High 38
7 Jul after	33.9 °C	7 %	41 km/h	0.0 mm	Very high 48
8 Jul after	31.9 °C	6 %	49 km/h	0.0 mm	Extreme 52
9 Jul after	32.9 °C	6 %	42 km/h	0.0 mm	Very high 46
10 Jul after	32.8 °C	9 %	51 km/h	0.0 mm	Extreme 52
11 Jul after	33.2 °C	9 %	37 km/h	0.0 mm	Extreme 51
12 Jul after	32.1 °C	17 %	30 km/h	0.7 mm	High 38
13 Jul after	32.1 °C	14 %	35 km/h	0.0 mm	Very high 42
14 Jul after	32.7 °C	15 %	50 km/h	0.5 mm	Very high 45
15 Jul after	31.1 °C	17 %	38 km/h	0.2 mm	Very high 43
16 Jul after	30.9 °C	14 %	28 km/h	0.0 mm	Very high 46

Before and after, from space

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

↔

Before · 26 Jun 2024

After · 13 Jul 2024

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.

The smoke

CAMS · Copernicus

On 1 July 2024 the air beside the fire reached 14 µg/m³ of PM2.5, but no daily average passed the WHO guideline (15).

PM2.5 peak14 µg/m³

Days over the guideline0 days

PM1022 µg/m³

Optical depth0.39

123456

Good Fair Moderate Poor Very poor Extremely poor

Particles from the Copernicus CAMS model at the centre of the perimeter; these are not measurements in each town. The pale bar is the worst hour, the solid one the daily average.

Open-Meteo.com (CC BY 4.0) · Copernicus Atmosphere Monitoring Service (CAMS)

Detections table · 61Every 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

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Frequently asked questions

How long did the Weimer fire last?: According to the heat detections seen by satellite inside the perimeter, it burned from 3 July 2024 to 6 July 2024 (4 days). The perimeter dates it from 3 July 2024 to 3 July 2024.
How much area did it burn?: The official perimeter published by United States agencies (MTBS / NIFC) is 441 hectares (4.4 km²). Other tallies, such as daily incident reports, may give slightly different figures.
Which counties burned?: The fire only entered Coconino (434 ha, 0.0 %).
What was the weather like?: During the fire the temperature reached 32.8 °C, humidity dropped to 5 % and gusts hit 42 km/h. The fire danger index (FWI) reached 41, 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

NASA FIRMS ↗
NIFC · Fire maps ↗

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.

Report an error

What do you think is wrong?

Dates or duration Place or towns Burned area Name It was not a wildfire Same fire as another page Something else

What really happened?

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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.

How we know this

Perimeter: MTBS (US Geological Survey and US Forest Service), official.
Dates adjusted with the VIIRS detections inside the perimeter, which said 3 July 2024 to 3 July 2024. 61 Suomi-NPP VIIRS detections on those dates.
We have not matched this page with any official record.
Weather: Copernicus ERA5 reanalysis at the fire location, in cells of about 25 km.

How we build fire pages: methodology ›

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