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California fires map december 20174/16/2024 It appears that a vulnerable power system, urbanization of fire-prone areas, flammable invasive species, and poor communication of dangerous conditions contributed to this catastrophic event. Importantly, operational mesoscale forecast models provided excellent forecasts of the high winds several days in advance. High-resolution meteorological modeling realistically simulated the strong winds associated with this event. The climatological conditions preceding the fires are reviewed, including near-normal precipitation and above-normal temperatures during the summer, as well as much above-normal precipitation the previous winter, which led to abundant dry grass that provided fuel for the wind-driven fires. This paper describes the synoptic and mesoscale conditions that were associated with the wildfires, with strong, easterly “Diablo” winds playing a central role in both initiating and supporting the fires. These “Wine Country” wildfires were the most destructive in California history, with 44 deaths the loss of 9,000 buildings damage to approximately 21,000 structures $10 billion of insured losses and substantially greater total economic loss. This map was created by Liz Anderson, Emily Zentner, Veronika Nagy, Chris Hagan, Renee Thompson, Katy Kidwell and Helga Salinas.A series of large wildfires began over the terrain north of San Francisco, California, during the evening of 8 October 2017 and spread across nearly 250,000 acres, including areas near the towns of Santa Rosa and Napa. Fire namesĬapRadio changed the names of three fires on this map that included a racial slur in accordance with Associated Press guidelines and our own standards. Fires may be missing altogether or have missing or incorrect attribute data. As of September 2020, Cal Fire had found that the dataset is missing 483 notable fires and is looking to find and add these. However, the data is by nature incomplete and duplicates may exist. Ten acres is the federal minimum for reporting.Ĭal Fire says that this dataset - which runs from 1878 to 2020 as of April 2021 and is updated annually - is one of the most complete datasets of California’s fires through history. Cal Fire’s data includes timber fires that burned more than 10 acres, brush fires that burned more than 50 acres and grass fires that burned more than 300 acres, so some smaller fires may not be shown here. Some fires may be missing because historical records were lost or damaged, were too small for the minimum cutoffs, had inadequate documentation or have not yet been incorporated into the database. ![]() ![]() This means that the causes shown for some fires may be out of date. Cal Fire enters the cause of each year’s fires when this data is captured annually and does not update them if investigations are later completed or determinations are changed. Fire causesĪlso displayed here are the reported cause and acres of each fire shown. These fires are also categorized by the meteorological season in which they started, which are as follows: Winter (December - February), Spring (March - May), Summer (June - August) and Fall (September - November). 2020 is also shown separately because there has been only one recorded fire year so far in the 2020s decade in this dataset. Fires that started between 18 are shown separately here due to more inconsistencies in data for earlier fires. ![]() 77 fires that did not include a year in the data have been left out. These wildfires are categorized by the decade or time period in which they started. This map and data is not intended to be used for legal purposes or statistical analysis. Forest Service, the Bureau of Land Management and the U.S. This map shows the perimeters of more than 20,000 wildfires that have been recorded in California from 1878 to 2020 using data from Cal Fire, the National Parks Service, the U.S.
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