Tepic fire, May 2018 Tepic
The fire started on 5 May 2018 in Tepic, Mexico, and satellites saw it burning for 15 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 6,529 hectares from heat detections, spread across a single municipality.
It is the 16th largest in Nayarit since 2016 (of 179 with a page). Number 27 in Mexico in 2018, of 235.
- Burnt area
- 6,529ha
- GWIS perimeter (Copernicus)
- Duration
- 15days
- 5 May 2018 – 19 May 2018
- Municipalities hit
- 1
- municipalities
- Started on
- 5 May
- 2018
- Heat detections
- 372
- in a single hotspot: 149 MW
- Danger at start
- 29
- High · FWI index
- Energy released
- 2.5GW
- sum of detected power
Where it burned
How it evolved, day by day
Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.
The weather it burned in
It had gone 2 days without rain (1 mm or more) when it started. Rain came after the fire: 2.4 mm on 4 Jun.
This area had burned before
35% of the perimeter overlaps earlier fires recorded since 2016: 2,278 ha in 2016.
What happened to each town
-
6,557 ha reached on 5 May4.0 %
Burnt area inside each municipality, from crossing the GWIS 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.
Official record
According to CONAFOR, this fire started on 6 May 2018 and burned 3,872 ha (the satellite measured 6,529 ha). The two figures differ a lot, so these may not be exactly the same fire: take them as nearby records.
- Tepic Ejido 6 de Enero 6 May 2018 3,872 ha · extinguished on 20 May 2018 · cause: unknown
CONAFOR (Comisión Nacional Forestal), estadística de incendios forestales en datos.gob.mx (CC BY 4.0). This is the agency’s consolidated statistic: it measures the area in its own way, which is why it can differ from the satellite.
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 May | 29.7 °C | 30 % | 39 km/h | 0.6 mm | High 29 |
| 6 May | 28.7 °C | 40 % | 40 km/h | 8.2 mm | Very low 4 |
| 7 May | 28.9 °C | 38 % | 37 km/h | 10.2 mm | Very low 3 |
| 8 May | 27.1 °C | 43 % | 39 km/h | 6.2 mm | Very low 2 |
| 9 May | 26.5 °C | 36 % | 40 km/h | 0.4 mm | Low 9 |
| 10 May | 26.5 °C | 41 % | 36 km/h | 0.5 mm | Moderate 12 |
| 11 May | 26.2 °C | 47 % | 37 km/h | 1.4 mm | Low 7 |
| 12 May | 26.1 °C | 39 % | 45 km/h | 0.0 mm | Moderate 14 |
| 13 May | 27.5 °C | 30 % | 40 km/h | 0.0 mm | Moderate 19 |
| 14 May | 28.2 °C | 31 % | 40 km/h | 0.2 mm | Moderate 20 |
| 15 May | 29.2 °C | 27 % | 42 km/h | 0.0 mm | High 24 |
| 16 May | 28.6 °C | 31 % | 38 km/h | 0.0 mm | High 24 |
| 17 May | 29.4 °C | 31 % | 40 km/h | 0.0 mm | High 25 |
| 18 May | 28.9 °C | 25 % | 41 km/h | 0.0 mm | High 26 |
| 19 May | 28.1 °C | 17 % | 45 km/h | 0.0 mm | High 32 |
| 20 May after | 27.7 °C | 14 % | 41 km/h | 0.0 mm | High 33 |
| 21 May after | 28.6 °C | 16 % | 40 km/h | 0.0 mm | High 33 |
| 22 May after | 28.5 °C | 18 % | 39 km/h | 0.0 mm | High 34 |
| 23 May after | 28.8 °C | 24 % | 41 km/h | 0.0 mm | High 34 |
| 24 May after | 29.0 °C | 21 % | 42 km/h | 0.0 mm | High 36 |
| 25 May after | 28.3 °C | 26 % | 41 km/h | 0.0 mm | High 34 |
| 26 May after | 28.2 °C | 36 % | 38 km/h | 0.0 mm | High 29 |
| 27 May after | 27.5 °C | 42 % | 40 km/h | 0.0 mm | High 26 |
| 28 May after | 27.7 °C | 44 % | 36 km/h | 0.0 mm | High 24 |
| 29 May after | 26.4 °C | 50 % | 39 km/h | 0.0 mm | High 22 |
| 30 May after | 29.7 °C | 35 % | 42 km/h | 0.0 mm | High 26 |
| 31 May after | 29.2 °C | 41 % | 39 km/h | 0.1 mm | High 26 |
| 1 Jun after | 29.2 °C | 46 % | 45 km/h | 0.3 mm | High 26 |
| 2 Jun after | 29.8 °C | 39 % | 43 km/h | 0.7 mm | High 23 |
| 3 Jun after | 27.6 °C | 47 % | 44 km/h | 0.2 mm | High 24 |
| 4 Jun after | 28.8 °C | 44 % | 43 km/h | 2.4 mm | Low 10 |
Before and after, from space
Drag the line to compare the same ground before the fire and after it.
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 · 372Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
Frequently asked questions
- How long did the Tepic fire last?
- GWIS (Copernicus) dates it between 5 May 2018 and 19 May 2018: 15 days between the first and last heat detection of the perimeter.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 6,529 hectares (65.3 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Tepic (6,557 ha, 4.0 %).
- What was the weather like?
- During the fire the temperature reached 29.7 °C, humidity dropped to 14 % and gusts hit 45 km/h. The fire danger index (FWI) reached 36, class High.
- Where does this data come from?
- From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Mexico (geoBoundaries). 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
Where this data comes from
The perimeter comes from the Copernicus Global Wildfire Information System (GWIS), which rebuilds it from MODIS and VIIRS heat detections and publishes it under CC BY 4.0. It is not measured on imagery as in Europe, so it is an estimate. Heat detections come from the VIIRS sensors aboard Suomi-NPP and NOAA-20, distributed by NASA FIRMS at 375 m resolution. Municipal boundaries come from geoBoundaries ADM2 (Creative Commons Attribution 4.0 (CC BY 4.0)). The area per municipality is computed by WorldFires by crossing the perimeter with those boundaries, so it may differ from each country’s official figure.