Forecasting wildfire danger is a challenging task due to its complexity involving climate system, interactions with vegetation and socio-economic components (Hantson et al., 2016). As result of the remarkable progress in numerical weather forecasting (Bauer et al., 2015), its application for fire forecasting has also advanced, and some government agencies are now providing fire weather forecasting services. For instance, the National Interagency Coordination Center (NICC, https://www.nifc.gov/nicc/predictive/outlooks/outlooks.htm) issues public service forecasts of fire hazard in the United States for up to 7 days (called the 7-Day Significant Fire Potential Outlook). These forecasts categorize the fire potential into nine levels, considering fuel dryness, fire weather, ignition triggers, and resource capability. The European Forest Fire Information System (EFFIS, https://effis.jrc. ec.europa.eu) or the Global Wildfire Information System (GWIS, https://gwis.jrc.ec.europa.eu/) also provide fire danger forecast using four different indices based on the Fire Weather Index (FWI) system.