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Neck Fire, September 2019 Iron

Out · last detection 6 Sept 2019, 20:27 UTC

The fire started on 5 September 2019 in Iron, United States, and satellites saw it burning for 1 day. United States agencies (MTBS / NIFC) mapped an official burnt perimeter of 7,906 hectares, spread across a single county.

It is the 22th largest in Utah since 2016 (of 165 with a page). Number 37 in United States in 2019, of 367.

Burnt area
7,906ha
official perimeter (MTBS / NIFC)
Duration
1day
5 Sept 2019 – 5 Sept 2019
Municipalities hit
1
counties
Started on
5 Sept
2019
Heat detections
91
in a single hotspot: 58 MW
Danger at start
57
Extreme · FWI index
Energy released
1.8GW
sum of detected power

Where it burned

HOTSPOTS BY DAY 5 Sept5 Sept

How it evolved, day by day

6

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
60km/h · peak gust
7%lowest humidity

It had gone 35 days without rain (1 mm or more) when it started.

This area had burned before

6% of the perimeter overlaps earlier fires recorded since 2016: 485 ha in 2018.

What happened to each town

  1. Iron where it started
    7,936 ha reached on 6 Sept
    0.9 %

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)
5 Sept 30.8 °C 15 % 38 km/h 0.3 mm Extreme 57
6 Sept after 29.8 °C 19 % 33 km/h 0.6 mm Very high 43
7 Sept after 31.0 °C 12 % 32 km/h 0.0 mm Very high 49
8 Sept after 26.6 °C 11 % 60 km/h 0.0 mm Extreme 68
9 Sept after 27.0 °C 7 % 49 km/h 0.0 mm Extreme 63
10 Sept after 25.1 °C 14 % 64 km/h 0.0 mm Very extreme 76
11 Sept after 23.3 °C 9 % 35 km/h 0.0 mm Extreme 50
12 Sept after 23.6 °C 10 % 33 km/h 0.0 mm Extreme 52
13 Sept after 27.7 °C 6 % 23 km/h 0.0 mm Very high 44
14 Sept after 30.5 °C 6 % 30 km/h 0.0 mm Extreme 52
15 Sept after 28.3 °C 10 % 49 km/h 0.0 mm Extreme 68
16 Sept after 25.5 °C 14 % 74 km/h 0.0 mm Very extreme 85
17 Sept after 24.5 °C 7 % 49 km/h 0.0 mm Extreme 65
18 Sept after 24.7 °C 9 % 55 km/h 0.0 mm Extreme 68
19 Sept after 23.9 °C 8 % 68 km/h 0.0 mm Very extreme 82

Before and after, from space

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

Before · 29 Aug 2019
After · 12 Sept 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 · 91Every 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 Neck fire last?
It burned between 5 September 2019 and 5 September 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 7,906 hectares (79.1 km²). Other tallies, such as daily incident reports, may give slightly different figures.
Which counties burned?
The fire only entered Iron (7,936 ha, 0.9 %).
What was the weather like?
During the fire the temperature reached 31.0 °C, humidity dropped to 7 % and gusts hit 60 km/h. The fire danger index (FWI) reached 68, 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

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?

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.