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Daily Fire Weather Index forecast. The Forest fire weather index (FWI) (French: indice forêt météo, IFM) is an estimation of the risk of wildfire computed by Météo France and the Meteorological Service of Canada. It was introduced in France in 1992 but is based on a Canadian empirical model developed and widely used since 1976. [1]
Wildland fire behavior is affected by weather, fuel characteristics, and topography. Weather influences fire through wind and moisture. Wind increases the fire spread in the wind direction, higher temperature makes the fire burn faster, while higher relative humidity, and precipitation (rain or snow) may slow it down or extinguish it altogether ...
These data may be acquired with a radiosonde or simulated by a numerical weather prediction model. The index is calculated over three ranges of atmospheric pressure: low elevation (950-850 millibars (mb)), mid elevation (850-700 mb), and high elevation (700-500 mb). [2]
The treacherous combination of rising temperatures and dried-up fuels has made Canadian forest much more prone to severe wildfires in recent decades, a new study has found. Driving these dangerous ...
The ensemble variant of the GEM is known as the Global Ensemble Prediction System (GEPS). It has 20 members (plus control) and runs out 16 days, the same range as the American global forecast system. The GEPS runs alongside the GFS ensemble to form the North American Ensemble Forecast System. A regional ensemble prediction system (REPS ...
The initial state of the atmosphere and/or the numerical weather prediction model configuration are slightly varied to provide a range of possible forecast solutions. [4] [5] The global ensemble prediction systems at MSC and NWS use slightly different, but equally valid methods to initialize and integrate the atmospheric state. By combining the ...
The threat of renewed fire danger looms over Southern California as strong Santa Ana winds are forecast to intensify Monday night, further endangering communities already grappling with a series ...
Another day of gusty winds is forecast Wednesday for Southern California, where a rare "Particularly Dangerous Situation" red flag warning continues until 3 p.m. for western Los Angeles County and ...