Fire risk values, analysed — Download service

In the decision support system Fire Risk Forest and Land, fire risk forecasts and weather are reported as support for decisions on fire in vegetation. Once the forecast has ended, a new calculation of the fire risk values is made based on 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 is saved with the midpoint given in x and y coordinates. Each 11*11 km square 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 the humidity in a slightly deeper layer than the most superficial in the FWI model, e.g. 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: The initial spread index. A measure of the rate of spread of the fire. An index used to calculate an FWI. Calculated from FFMC and reinforced 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. Weighted average of DMC and DC. FWI: Fire Weather Index. Fire risk value calculated from ISI and BUI, which in turn are based on three basic values for moisture content in different layers (FFMC, DMC and DC). The input to 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 the basic value 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 moisture in two soil layers calculated with HBV-Skog, which is a special adaptation of the hydrological runoff model HBV (Hydrological Agency’s Water Balance Department). The input to the model is daily rainfall and daily average temperature. HBV-ö: HBV upper ground layer (see HBV above) HBV-u: HBV lower ground layer (see HBV above) Note that the display service displays the midpoints for which values have been collected. Downloading gives access to the actual values as described above. During the respective calendar year, fire risk forecasts are available in the Fire Risk Forest and Land service. 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 the requirement for login. 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 on https://www.dinsakerhet.se/sakrare-fritid/skog-och-mark/brandriskprognos-for-gras--och-skogsbrander/