Fire risk values, analysed — view service

In the decision support system Fire Risk Forest and Mark, fire risk forecasts and weather are calculated as support for decisions on issues related to fire in vegetation. At the end of the forecast, a new calculation of the fire risk values is made on the basis of the latest available weather data. This “analysis data” is stored. After each year’s fire season, the analysed historical data set of the model-calculated boxes of 11*11 km with the midpoint in x and y coordinates is saved. Please note that the WMS service only contains the previous year’s data. Each 11*11 km box has the attributes listed below (some variation may occur from year to year): FFMC: Fine Fuel Moisture Code represents the humidity of leaves and grass. The maximum water storage in this layer is less than 1 mm. Included in the FWI model. DMC: The Duff Moisture Code represents humidity in a slightly deeper layer than the most superficial in the FWI model, such as moss and the superficial soil layer. The storage in this layer corresponds to about 15 mm of water DC: The Drought Code shows the moisture content of thick compact humus layers (about 100 mm water). DC is part of the FWI model. ISI: Initial Spread Index. A measure of fire dispersal speed. An index used to calculate an FWI value. Calculated from FFMC and amplified by wind speed. BUI: Buildup Index. Can be seen as a general measure of humidity for the slightly deeper soil layers. An index value used to calculate a fire risk value, FWI value. Weighted average of DMC and DC. FWI: Fire Weather Index. Fire risk calculated from the ISI and BUI, which in turn are based on three basic values for moisture content in different layers (FFMC, DMC and DC). The input data for the calculation is the daily rainfall as well as temperature, relative humidity and wind speed in the middle of the day. FWI index: Index of spread risk and fire behaviour in forest land. Based on baseline FWI (see above). Currently divided into six different index levels (1, 2, 3, 4, 5, 5E) where index 1 is the lowest risk and index 5E is the highest risk. HBV: Weighted soil moisture value based on the humidity of two layers of soil calculated with HBV-Forest, which is a special adaptation of the hydrological drainage model HBV (Water Balance Department of the Hydrological Agency). The input data for the model are daily rainfall and daily average temperature. HBV island: HBV upper ground layer (see HBV above) HBV-u: HBV lower ground layer (see HBV above) Please note that the View Service displays the midpoints for which values have been collected. Downloading gives access to the actual values as described above. Fire risk forecasts are available in the fire forest and land service during the respective calendar year. The service requires login and authorisation is given primarily to municipal rescue services, county administrative boards, forestry, etc. A simplified information from the system is also presented publicly without a login requirement. Here is the public service: https://www.msb.se/sv/amnesomraden/skydd-mot-olyckor-och-farliga-amnen/naturolyckor-och-klimat/skogsbrand-och-vegetationsbrand/brandriskprognoser/ or https://www.dinsakerhet.se/sakrare-fritid/skog-och-mark/brandriskprognos-for-gras--och-skogsbrander/