Quarterly Drought Status Update: July - September 2019
The monsoon activity began late in the summer with some heavy rainfall events, but they were highly localized, and precipitation was below average for most locations.
The dry conditions in July and August continued in September reversing the long-term drought improvements last quarter after the extremely wet winter and relatively wet spring. This led to a significant degradation in long-term drought conditions and the expansion of Moderate (D1), Severe (D2) and Extreme Drought (D3), particularly in the northern two-thirds of the state.
Cochise, western Maricopa and eastern Yavapai counties had above average monsoon rainfall and saw little degradation in long-term drought conditions.
Without an El Niño or La Niña signature in the Pacific, there is little climate signal suggesting any tendency for above or below normal precipitation heading towards the fall and early winter season.
This report was prepared by the Arizona Drought Monitoring Technical Committee, October 4, 2019. Arizona's long-term drought status map is updated quarterly and the next update in early January will reflect the conditions of October, November and December. The long-term drought status for each watershed is determined by comparing the precipitation and streamflow percentiles for the past 24, 36 and 48 months to a 40-year historical record.