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California Drought Early Warning System

Conditions for the week of December 6-12

In November, California’s South Coast climate division reported its second and third highest monthly minimum and average temperatures, respectively, and an average of just 0.10 inch of rainfall (average is 1.51 inches for that period). This heat and dryness continued into early December. Fueled by these conditions and Santa Ana winds up to 80 mph that raised a purple warning flag for the first time on record, wildfires raged in Ventura and Los Angeles Counties over the past week. Inland, along the southeastern California/Nevada border region, abnormally dry conditions (D0) were extended northwestward into southern Inyo County, CA. 

Read more about the California DEWS

U.S. Drought Monitor - California DEWS

As of December 12, 2017

Author: Jessica Blunden,NCEI/NOAA

U.S. Drought Monitor - California DEWS
U.S. Drought Monitor - California DEWS
Drought Conditions (Percent Area)
WeekNoneD0-D4D1-D4D2-D4D3-D4D4
Current
12/12/2017
55.70%44.30%9.90%0.00%0.00%0.00%
Last Week
12/05/2017
65.38%34.62%9.90%0.00%0.00%0.00%
Three Months Ago
9/12/2017
77.88%22.12%8.24%0.04%0.00%0.00%
Start of Calendar Year
1/03/2017
18.07%81.93%67.61%54.02%38.17%18.31%
Start of Water Year
10/03/2017
77.88%22.12%8.24%0.00%0.00%0.00%
One Year Ago
12/13/2016
12.16%87.84%73.04%60.27%42.80%21.04%

Drought Intensities

  •       None: No Drought
  •       D0: Abnormally Dry
  •       D1: Moderate Drought
  •       D2: Severe Drought
  •       D3: Extreme Drought
  •       D4: Exceptional Drought
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