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Layer: FlameLength_2021_Clip (ID: 8)

Name: FlameLength_2021_Clip

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Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>WildEST – Wildfire Exposure Simulation Tool</SPAN></SPAN></P><P /><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>WildEST is a scripted geospatial process used for simulating potential fire behavior characteristics that addresses two shortcomings of current methods. WildEST performs multiple deterministic simulations under a range of weather types (wind speed, wind direction, fuel moisture content). Rather than weighting results solely according to the temporal relative frequencies of the weather scenarios, the WildEST process integrates results by weighting them according to their weather type probabilities (WTP), which appropriately weights high-spread conditions into the calculations.</SPAN></SPAN></P><P /><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>Most WildEST results apply to the head of the fire. For fire-effects calculations, WildEST also generates flame-length probability rasters that incorporate non-heading spread directions, for which fire intensity is considerably lower than at the head of the fire. These “NVC” FLPs are analogous to FLP rasters produced by FSim. </SPAN></SPAN></P><P /><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>WildEST was run for the </SPAN></SPAN><SPAN><SPAN>CAL 2021 </SPAN></SPAN><SPAN><SPAN>fuelscape at </SPAN></SPAN><SPAN><SPAN>30-m</SPAN></SPAN><SPAN><SPAN> resolution using gridded </SPAN></SPAN><SPAN><SPAN>historical California weather data provided by CALFIRE</SPAN></SPAN><SPAN><SPAN>. Please reference the </SPAN></SPAN><SPAN><SPAN>CAL 2021 </SPAN></SPAN><SPAN><SPAN>report for more information on WildEST analysis.</SPAN></SPAN></P><P><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>This </SPAN></SPAN><SPAN><SPAN>flame length (FL)</SPAN></SPAN><SPAN><SPAN> dataset represents the weighted-average </SPAN></SPAN><SPAN><SPAN>flame length </SPAN></SPAN><SPAN><SPAN>(</SPAN></SPAN><SPAN><SPAN>in feet</SPAN></SPAN><SPAN><SPAN>) for a given pixel in the fuelscape (including any contribution of crown fuel). </SPAN></SPAN></P><P /><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>FL </SPAN></SPAN><SPAN><SPAN>is calculated using heading-only fire behavior and is weighted according to WTP, incorporating both temporal frequencies and the influence of high-spread conditions. Please reference the </SPAN></SPAN><SPAN><SPAN>CAL 2021</SPAN></SPAN><SPAN><SPAN> report for more detailed information. Raster resolution is </SPAN></SPAN><SPAN><SPAN>30m</SPAN></SPAN><SPAN><SPAN>. Data finalized </SPAN></SPAN><SPAN><SPAN>9/24/2021</SPAN></SPAN><SPAN>.</SPAN></P></DIV></DIV></DIV>

Service Item Id: c810f45f30624f368c7f702c60614be8

Copyright Text: Primary data contact: Shane Rosmos (Spatial Informatics Group Senior Scientist) sromsos@sig-gis.com This 2021 dataset is an update produced by Pyrologix (pyrologix.com) for the Pyregence Consortium (pyregence.org). The 2020 dataset was developed by Pyrologix for the USFS Pacific Southwest Region.

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