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Hadweenzic River Fire, June 2019 Yukon-Koyukuk

Out · last detection 23 Jun 2019, 22:22 UTC

The fire started on 22 June 2019 in Yukon-Koyukuk, United States, and satellites saw it burning for 1 day. United States agencies (MTBS / NIFC) mapped an official burnt perimeter of 23,240 hectares, spread across a single county.

It is the 37th largest in Alaska since 2016 (of 472 with a page). Number 16 in United States in 2019, of 367.

Burnt area
23,240ha
official perimeter (MTBS / NIFC)
Duration
1day
22 Jun 2019 – 22 Jun 2019
Municipalities hit
1
counties
Started on
22 Jun
2019
Heat detections
4,389
in a single hotspot: 990 MW
Danger at start
24
High · FWI index
Energy released
990MW
sum of detected power

Where it burned

HOTSPOTS BY DAY 22 Jun22 Jun

How it evolved, day by day

23

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

The weather it burned in

31°high
49km/h · peak gust
22%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.

What happened to each town

  1. Yukon-Koyukuk where it started
    24,419 ha reached on 23 Jun
    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)
22 Jun 29.1 °C 27 % 32 km/h 1.0 mm High 24
23 Jun after 25.3 °C 33 % 34 km/h 0.1 mm High 26
24 Jun after 22.7 °C 33 % 36 km/h 0.0 mm High 28
25 Jun after 20.6 °C 22 % 32 km/h 0.0 mm High 30
26 Jun after 24.2 °C 22 % 20 km/h 0.0 mm High 28
27 Jun after 21.8 °C 41 % 37 km/h 0.2 mm High 29
28 Jun after 27.2 °C 34 % 34 km/h 0.0 mm High 28
29 Jun after 31.2 °C 26 % 49 km/h 0.0 mm Very high 40
30 Jun after 27.2 °C 37 % 42 km/h 0.3 mm High 35
1 Jul after 21.0 °C 26 % 53 km/h 0.0 mm Very high 39
2 Jul after 22.6 °C 29 % 27 km/h 0.0 mm High 29
3 Jul after 20.5 °C 44 % 46 km/h 0.3 mm High 30
4 Jul after 23.8 °C 32 % 36 km/h 0.0 mm High 30
5 Jul after 26.2 °C 33 % 41 km/h 0.0 mm High 32
6 Jul after 28.3 °C 26 % 25 km/h 0.0 mm High 30
7 Jul after 28.3 °C 27 % 21 km/h 0.0 mm High 30
8 Jul after 29.1 °C 26 % 23 km/h 0.0 mm High 30
9 Jul after 30.6 °C 23 % 21 km/h 0.0 mm High 33

Before and after, from space

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

Before · 15 Jun 2019
After · 29 Jun 2019

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 · 4,389Every 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 Hadweenzic River fire last?
It burned between 22 June 2019 and 22 June 2019: 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 23,240 hectares (232.4 km²). Other tallies, such as daily incident reports, may give slightly different figures.
Which counties burned?
The fire only entered Yukon-Koyukuk (24,419 ha, 0.1 %).
What was the weather like?
During the fire the temperature reached 31.2 °C, humidity dropped to 22 % and gusts hit 49 km/h. The fire danger index (FWI) reached 40, 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.