How long did the Clover fire last?

According to the heat detections seen by satellite inside the perimeter, it burned from 7 September 2020 to 8 September 2020 (2 days). The perimeter dates it from 7 September 2020 to 7 September 2020.

How much area did it burn?

The official perimeter published by United States agencies (MTBS / NIFC) is 608 hectares (6.1 km²). Other tallies, such as daily incident reports, may give slightly different figures.

Which counties burned?

The fire only entered Clearwater (605 ha, 0.1 %).

What was the weather like?

During the fire the temperature reached 23.2 °C, humidity dropped to 16 % and gusts hit 81 km/h. The fire danger index (FWI) reached 62, class 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 · 2020-09-07 → 2020-09-08

Clover Fire, September 2020 Clearwater

Out · last detection 8 Sept 2020, 10:43 UTC

The fire started on 7 September 2020 in Clearwater, United States, and satellites saw it burning for 2 days. United States agencies (MTBS / NIFC) mapped an official burnt perimeter of 608 hectares, spread across a single county.

It is the 304th largest in Idaho since 2016 (of 379 with a page). Number 367 in United States in 2020, of 441.

The power measured by the satellite is low (3.3 MW in the strongest hotspot), more typical of grass or stubble burning, or a slow surface fire, than of a large crown fire.

Compare with…

Suggestions: Bedrock · 2021 Texas · 2024 Clearwater · 2020 Lewis · 2026

Burnt area: 608ha; official perimeter (MTBS / NIFC)
Duration: 2days; 7 Sept 2020 – 8 Sept 2020
Municipalities hit: 1; counties
Started on: 7 Sept; 2020
Heat detections: 8; in a single hotspot: 3 MW
Danger at start: 62; Extreme · FWI index
Average daily power: 12MW; detected power per day, on average

HOTSPOTS BY DAY 7 Sept8 Sept

How it evolved, day by day

8 Sept 2020 · 12 MW · 8

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

The weather it burned in

23°high

81km/h · peak gust

16%lowest humidity

It had gone 6 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.

How big is it?

It burned the equivalent of 0.4% of the area of London (6.1 km² against 1,583 km²).

London boundary: geoBoundaries · Office for National Statistics (Open Government Licence v3.0).

This compares size, not location: both shapes are at the same scale, north up, centred on each other.

What happened to each town

Clearwater where it started

605 ha reached on 8 Sept

0.1 %

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)
7 Sept	23.2 °C	28 %	81 km/h	0.2 mm	Extreme 62
8 Sept	21.1 °C	16 %	35 km/h	0.0 mm	High 37
9 Sept after	27.3 °C	18 %	27 km/h	0.0 mm	High 36
10 Sept after	29.8 °C	15 %	19 km/h	0.0 mm	High 37
11 Sept after	28.7 °C	18 %	23 km/h	0.0 mm	High 37
12 Sept after	27.3 °C	18 %	22 km/h	0.0 mm	Very high 38
13 Sept after	28.1 °C	27 %	19 km/h	0.0 mm	High 35
14 Sept after	23.9 °C	30 %	18 km/h	0.0 mm	High 32
15 Sept after	25.5 °C	25 %	19 km/h	0.0 mm	High 30
16 Sept after	27.0 °C	26 %	17 km/h	0.0 mm	High 32
17 Sept after	26.7 °C	29 %	16 km/h	0.0 mm	High 33
18 Sept after	23.0 °C	38 %	29 km/h	0.2 mm	High 28

Before and after, from space

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

↔

Before · 31 Aug 2020

After · 15 Sept 2020

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 · 8Every 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 Clover fire last?: According to the heat detections seen by satellite inside the perimeter, it burned from 7 September 2020 to 8 September 2020 (2 days). The perimeter dates it from 7 September 2020 to 7 September 2020.
How much area did it burn?: The official perimeter published by United States agencies (MTBS / NIFC) is 608 hectares (6.1 km²). Other tallies, such as daily incident reports, may give slightly different figures.
Which counties burned?: The fire only entered Clearwater (605 ha, 0.1 %).
What was the weather like?: During the fire the temperature reached 23.2 °C, humidity dropped to 16 % and gusts hit 81 km/h. The fire danger index (FWI) reached 62, class 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 ↗

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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What do you think is wrong?

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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 7 September 2020 to 7 September 2020. 8 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