Drought Indicators

The province of BC uses four core indicators and additional supplemental indicators to establish:
  • if there is a drought or a possibility of drought
  • what the drought level is at a given point in time.
The province measures the following four core indicators to establish whether there is a drought:
  • Basin Snow Indices
  • Seasonal Volume Runoff Forecasts
  • 30 Day Percent of Average Precipitation
  • 7-Day Average Streamflow
The drought level is linked to a threshold established for each of the core indicators (see page 14 of the British Columbia Drought Response Plan).

In addition, the following supplemental indicators also help assess the situation.
  • Aquifer levels
  • Individual indicator hydrometric station results
  • Multi-year trends
  • Reservoir inflows
  • Wildfire danger class ratings
Source: British Columbia Drought Response Plan, June 2015