May brought two storms and six days of measurable rain to the Napa County ALERT monitoring stations (napa.onerain.com). Monthly average rainfall was achieved at many stations for the first time since December. The rain gauges recorded between 0.83 and 2.32 inches during the month, approximately 4.1% of mean annual rainfall (long-term May average is 4.2%). So far in Water Year (WY) 2019-20, we’ve received approximately 48% of our annual precipitation, well below the long-term average of 98% for this time of year. Seasonal rainfall totals at the rain gauges range between 12.5 inches (City of Napa) and 23.7 inches (Mt. Veeder). Barring unprecedented summer rain, WY 2019-20 will replace WY 2006-07 as the driest in the 18-year ALERT System record.