How long did the Pack fire last?

According to the heat detections seen by satellite inside the perimeter, it burned from 20 June 2022 to 8 July 2022 (19 days). The perimeter dates it from 20 June 2022 to 20 June 2022.

How much area did it burn?

The official perimeter published by United States agencies (MTBS / NIFC) is 12,080 hectares (120.8 km²). Other tallies, such as daily incident reports, may give slightly different figures.

Which counties burned?

The fire only entered Yukon-Koyukuk (12,298 ha, 0.0 %).

What was the weather like?

During the fire the temperature reached 28.4 °C, humidity dropped to 25 % and gusts hit 34 km/h. The fire danger index (FWI) reached 16, class Moderate.

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 · 2022-06-20 → 2022-07-08

Pack Fire, June 2022 Yukon-Koyukuk

Out · last detection 8 Jul 2022, 23:32 UTC

The fire started on 20 June 2022 in Yukon-Koyukuk, United States, and satellites saw it burning for 19 days. United States agencies (MTBS / NIFC) mapped an official burnt perimeter of 12,080 hectares, spread across a single county.

It is the 88th largest in Alaska since 2016 (of 472 with a page). Number 51 in United States in 2022, of 493.

Compare with…

Suggestions: Bear Mountain · 2017 Paddle · 2022

Burnt area: 12,080ha; official perimeter (MTBS / NIFC)
Duration: 19days; 20 Jun 2022 – 8 Jul 2022
Municipalities hit: 1; counties
Started on: 20 Jun; 2022
Heat detections: 527; in a single hotspot: 183 MW
Danger at start: 0; Very low · FWI index
Average daily power: 599MW; detected power per day, on average

HOTSPOTS BY DAY 20 Jun8 Jul

Play back 8 Jul 2022

How it evolved, day by day

20 Jun 27 Jun 30 Jun 2 Jul 5 Jul 7 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

28°high

34km/h · peak gust

25%lowest humidity

It had gone 0 days without rain (1 mm or more) when it started. Rain came after the fire: 9.2 mm on 9 Jul.

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 7.6% of the area of London (121 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

Yukon-Koyukuk where it started

12,298 ha reached on 20 Jun

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)
20 Jun	20.4 °C	55 %	23 km/h	4.4 mm	Very low 0
21 Jun	23.5 °C	31 %	22 km/h	0.0 mm	Very low 3
22 Jun	23.3 °C	36 %	30 km/h	0.0 mm	Low 10
23 Jun	20.5 °C	52 %	34 km/h	7.4 mm	Very low 1
24 Jun	21.1 °C	36 %	32 km/h	0.2 mm	Very low 4
25 Jun	26.1 °C	25 %	22 km/h	0.0 mm	Low 11
26 Jun	27.5 °C	26 %	17 km/h	0.0 mm	Moderate 14
27 Jun	26.4 °C	29 %	18 km/h	0.0 mm	Moderate 16
28 Jun	22.9 °C	41 %	31 km/h	2.4 mm	Very low 4
29 Jun	23.1 °C	40 %	26 km/h	0.0 mm	Low 8
30 Jun	25.9 °C	31 %	16 km/h	0.0 mm	Moderate 12
1 Jul	28.4 °C	30 %	16 km/h	0.0 mm	Moderate 16
2 Jul	27.6 °C	38 %	23 km/h	2.2 mm	Very low 5
3 Jul	26.6 °C	46 %	30 km/h	1.8 mm	Very low 4
4 Jul	26.8 °C	43 %	23 km/h	2.2 mm	Very low 3
5 Jul	27.8 °C	39 %	15 km/h	0.2 mm	Low 10
6 Jul	27.7 °C	40 %	22 km/h	0.9 mm	Low 10
7 Jul	26.6 °C	46 %	23 km/h	3.3 mm	Very low 3
8 Jul	25.7 °C	49 %	18 km/h	4.1 mm	Very low 1
9 Jul after	24.0 °C	58 %	25 km/h	9.2 mm	Very low 0

Before and after, from space

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

↔

Before · 13 Jun 2022

After · 15 Jul 2022

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 · 527Every 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 Pack fire last?: According to the heat detections seen by satellite inside the perimeter, it burned from 20 June 2022 to 8 July 2022 (19 days). The perimeter dates it from 20 June 2022 to 20 June 2022.
How much area did it burn?: The official perimeter published by United States agencies (MTBS / NIFC) is 12,080 hectares (120.8 km²). Other tallies, such as daily incident reports, may give slightly different figures.
Which counties burned?: The fire only entered Yukon-Koyukuk (12,298 ha, 0.0 %).
What was the weather like?: During the fire the temperature reached 28.4 °C, humidity dropped to 25 % and gusts hit 34 km/h. The fire danger index (FWI) reached 16, class Moderate.
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?

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 20 June 2022 to 20 June 2022. 527 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