California and Nevada’s climate and weather patterns create fire-prone environments for many wildland–urban interface communities, highlighting the value in understanding the relationships between drought and wildfire. More specifically, information is needed on how drought indices are related to fire danger outputs that are commonly used in fire management.
Current Drought Conditions
The 2019 Water Year was off to a dry start in California-Nevada. According to the U.S. Drought Monitor, ~74% of California-Nevada is in moderate (D1) to extreme drought (D3) as of December 4, 2018. Extreme drought (D3) conditions began impacting Ventura-Santa Barbara counties while D1-D2 conditions expanded over the Sierras and northern coastal California. Precipitation at the end of November into early December improved some of these conditions.
Current Drought Conditions
Over the course of the 2018 Water Year (Oct. 2017 - Sept. 2018), drought crept back into California-Nevada. According to the U.S. Drought Monitor, drought conditions have not changed over the last 2 months except for expansion of severe drought (D3) at the Oregon and Utah borders. As of Sept. 25, ~48% of California-Nevada was in moderate to extreme drought and ~43% was abnormally dry. Current forecasts show most drought areas persisting into the early winter with above-normal temperatures likely.
July 2018 drought outlook for the states of California and Nevada. This two page document includes current drought conditions, a regional climate update, drought and climate outlook.
May 2018 drought outlook for the states of California and Nevada. This two page document includes current drought conditions, a regional climate update, drought and climate outlook.
Below is a summary of the 23 May webinar led by Brian Fuchs, Climatologist with the National Drought Mitigation Center, and Ed Delgado, National Program Manager, Predictive Services, National Interagency Fire Center. The webinar explained drought conditions and outlook, as well as drought and wildfire in the region.