USGS's @hydrohammond has developed a new online streamflow-drought prediction tool. River DroughtCast provides machine-learning predictions of streamflow droughts up to 90 days in advance at ~3K gages across CONUS, with uncertainty information for each. Check it out! water.usgs.gov/vizlab/strea...
River DroughtCastStreamflow drought status and forecasts for the conterminous United Stateswater.usgs.gov